--- /dev/null
+From 700870119f49084da004ab588ea2b799689efaf7 Mon Sep 17 00:00:00 2001
+From: Josh Boyer <jwboyer@redhat.com>
+Date: Thu, 18 Apr 2013 07:51:34 -0700
+Subject: x86, efi: Don't map Boot Services on i386
+
+From: Josh Boyer <jwboyer@redhat.com>
+
+commit 700870119f49084da004ab588ea2b799689efaf7 upstream.
+
+Add patch to fix 32bit EFI service mapping (rhbz 726701)
+
+Multiple people are reporting hitting the following WARNING on i386,
+
+ WARNING: at arch/x86/mm/ioremap.c:102 __ioremap_caller+0x3d3/0x440()
+ Modules linked in:
+ Pid: 0, comm: swapper Not tainted 3.9.0-rc7+ #95
+ Call Trace:
+ [<c102b6af>] warn_slowpath_common+0x5f/0x80
+ [<c1023fb3>] ? __ioremap_caller+0x3d3/0x440
+ [<c1023fb3>] ? __ioremap_caller+0x3d3/0x440
+ [<c102b6ed>] warn_slowpath_null+0x1d/0x20
+ [<c1023fb3>] __ioremap_caller+0x3d3/0x440
+ [<c106007b>] ? get_usage_chars+0xfb/0x110
+ [<c102d937>] ? vprintk_emit+0x147/0x480
+ [<c1418593>] ? efi_enter_virtual_mode+0x1e4/0x3de
+ [<c102406a>] ioremap_cache+0x1a/0x20
+ [<c1418593>] ? efi_enter_virtual_mode+0x1e4/0x3de
+ [<c1418593>] efi_enter_virtual_mode+0x1e4/0x3de
+ [<c1407984>] start_kernel+0x286/0x2f4
+ [<c1407535>] ? repair_env_string+0x51/0x51
+ [<c1407362>] i386_start_kernel+0x12c/0x12f
+
+Due to the workaround described in commit 916f676f8 ("x86, efi: Retain
+boot service code until after switching to virtual mode") EFI Boot
+Service regions are mapped for a period during boot. Unfortunately, with
+the limited size of the i386 direct kernel map it's possible that some
+of the Boot Service regions will not be directly accessible, which
+causes them to be ioremap()'d, triggering the above warning as the
+regions are marked as E820_RAM in the e820 memmap.
+
+There are currently only two situations where we need to map EFI Boot
+Service regions,
+
+ 1. To workaround the firmware bug described in 916f676f8
+ 2. To access the ACPI BGRT image
+
+but since we haven't seen an i386 implementation that requires either,
+this simple fix should suffice for now.
+
+[ Added to changelog - Matt ]
+
+Reported-by: Bryan O'Donoghue <bryan.odonoghue.lkml@nexus-software.ie>
+Acked-by: Tom Zanussi <tom.zanussi@intel.com>
+Acked-by: Darren Hart <dvhart@linux.intel.com>
+Cc: Josh Triplett <josh@joshtriplett.org>
+Cc: Matthew Garrett <mjg59@srcf.ucam.org>
+Cc: H. Peter Anvin <hpa@zytor.com>
+Cc: Ingo Molnar <mingo@kernel.org>
+Cc: Thomas Gleixner <tglx@linutronix.de>
+Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Signed-off-by: Josh Boyer <jwboyer@redhat.com>
+Signed-off-by: Matt Fleming <matt.fleming@intel.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/x86/platform/efi/efi.c | 11 +++++++----
+ 1 file changed, 7 insertions(+), 4 deletions(-)
+
+--- a/arch/x86/platform/efi/efi.c
++++ b/arch/x86/platform/efi/efi.c
+@@ -588,10 +588,13 @@ void __init efi_enter_virtual_mode(void)
+
+ for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+ md = p;
+- if (!(md->attribute & EFI_MEMORY_RUNTIME) &&
+- md->type != EFI_BOOT_SERVICES_CODE &&
+- md->type != EFI_BOOT_SERVICES_DATA)
+- continue;
++ if (!(md->attribute & EFI_MEMORY_RUNTIME)) {
++#ifdef CONFIG_X86_64
++ if (md->type != EFI_BOOT_SERVICES_CODE &&
++ md->type != EFI_BOOT_SERVICES_DATA)
++#endif
++ continue;
++ }
+
+ size = md->num_pages << EFI_PAGE_SHIFT;
+ end = md->phys_addr + size;
--- /dev/null
+From 4f0acd31c31f03ba42494c8baf6c0465150e2621 Mon Sep 17 00:00:00 2001
+From: Masoud Sharbiani <msharbiani@twitter.com>
+Date: Fri, 20 Sep 2013 15:59:07 -0700
+Subject: x86/reboot: Add quirk to make Dell C6100 use reboot=pci automatically
+
+From: Masoud Sharbiani <msharbiani@twitter.com>
+
+commit 4f0acd31c31f03ba42494c8baf6c0465150e2621 upstream.
+
+Dell PowerEdge C6100 machines fail to completely reboot about 20% of the time.
+
+Signed-off-by: Masoud Sharbiani <msharbiani@twitter.com>
+Signed-off-by: Vinson Lee <vlee@twitter.com>
+Cc: Robin Holt <holt@sgi.com>
+Cc: Russell King <rmk+kernel@arm.linux.org.uk>
+Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
+Link: http://lkml.kernel.org/r/1379717947-18042-1-git-send-email-vlee@freedesktop.org
+Signed-off-by: Ingo Molnar <mingo@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/x86/kernel/reboot.c | 16 ++++++++++++++++
+ 1 file changed, 16 insertions(+)
+
+--- a/arch/x86/kernel/reboot.c
++++ b/arch/x86/kernel/reboot.c
+@@ -460,6 +460,22 @@ static struct dmi_system_id __initdata p
+ DMI_MATCH(DMI_PRODUCT_NAME, "Precision M6600"),
+ },
+ },
++ { /* Handle problems with rebooting on the Dell PowerEdge C6100. */
++ .callback = set_pci_reboot,
++ .ident = "Dell PowerEdge C6100",
++ .matches = {
++ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
++ DMI_MATCH(DMI_PRODUCT_NAME, "C6100"),
++ },
++ },
++ { /* Some C6100 machines were shipped with vendor being 'Dell'. */
++ .callback = set_pci_reboot,
++ .ident = "Dell PowerEdge C6100",
++ .matches = {
++ DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
++ DMI_MATCH(DMI_PRODUCT_NAME, "C6100"),
++ },
++ },
+ { }
+ };
+
projects / thirdparty / kernel / stable-queue.git / commitdiff
