--- /dev/null
+From e1a534f5d074db45ae5cbac41d8912b98e96a006 Mon Sep 17 00:00:00 2001
+From: Huacai Chen <chenhuacai@loongson.cn>
+Date: Thu, 14 Jul 2022 16:41:34 +0800
+Subject: MIPS: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK
+
+From: Huacai Chen <chenhuacai@loongson.cn>
+
+commit e1a534f5d074db45ae5cbac41d8912b98e96a006 upstream.
+
+When CONFIG_CPUMASK_OFFSTACK and CONFIG_DEBUG_PER_CPU_MAPS is selected,
+cpu_max_bits_warn() generates a runtime warning similar as below while
+we show /proc/cpuinfo. Fix this by using nr_cpu_ids (the runtime limit)
+instead of NR_CPUS to iterate CPUs.
+
+[ 3.052463] ------------[ cut here ]------------
+[ 3.059679] WARNING: CPU: 3 PID: 1 at include/linux/cpumask.h:108 show_cpuinfo+0x5e8/0x5f0
+[ 3.070072] Modules linked in: efivarfs autofs4
+[ 3.076257] CPU: 0 PID: 1 Comm: systemd Not tainted 5.19-rc5+ #1052
+[ 3.084034] Hardware name: Loongson Loongson-3A4000-7A1000-1w-V0.1-CRB/Loongson-LS3A4000-7A1000-1w-EVB-V1.21, BIOS Loongson-UDK2018-V2.0.04082-beta7 04/27
+[ 3.099465] Stack : 9000000100157b08 9000000000f18530 9000000000cf846c 9000000100154000
+[ 3.109127] 9000000100157a50 0000000000000000 9000000100157a58 9000000000ef7430
+[ 3.118774] 90000001001578e8 0000000000000040 0000000000000020 ffffffffffffffff
+[ 3.128412] 0000000000aaaaaa 1ab25f00eec96a37 900000010021de80 900000000101c890
+[ 3.138056] 0000000000000000 0000000000000000 0000000000000000 0000000000aaaaaa
+[ 3.147711] ffff8000339dc220 0000000000000001 0000000006ab4000 0000000000000000
+[ 3.157364] 900000000101c998 0000000000000004 9000000000ef7430 0000000000000000
+[ 3.167012] 0000000000000009 000000000000006c 0000000000000000 0000000000000000
+[ 3.176641] 9000000000d3de08 9000000001639390 90000000002086d8 00007ffff0080286
+[ 3.186260] 00000000000000b0 0000000000000004 0000000000000000 0000000000071c1c
+[ 3.195868] ...
+[ 3.199917] Call Trace:
+[ 3.203941] [<98000000002086d8>] show_stack+0x38/0x14c
+[ 3.210666] [<9800000000cf846c>] dump_stack_lvl+0x60/0x88
+[ 3.217625] [<980000000023d268>] __warn+0xd0/0x100
+[ 3.223958] [<9800000000cf3c90>] warn_slowpath_fmt+0x7c/0xcc
+[ 3.231150] [<9800000000210220>] show_cpuinfo+0x5e8/0x5f0
+[ 3.238080] [<98000000004f578c>] seq_read_iter+0x354/0x4b4
+[ 3.245098] [<98000000004c2e90>] new_sync_read+0x17c/0x1c4
+[ 3.252114] [<98000000004c5174>] vfs_read+0x138/0x1d0
+[ 3.258694] [<98000000004c55f8>] ksys_read+0x70/0x100
+[ 3.265265] [<9800000000cfde9c>] do_syscall+0x7c/0x94
+[ 3.271820] [<9800000000202fe4>] handle_syscall+0xc4/0x160
+[ 3.281824] ---[ end trace 8b484262b4b8c24c ]---
+
+Cc: stable@vger.kernel.org
+Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
+Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ arch/mips/kernel/proc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/mips/kernel/proc.c
++++ b/arch/mips/kernel/proc.c
+@@ -168,7 +168,7 @@ static void *c_start(struct seq_file *m,
+ {
+ unsigned long i = *pos;
+
+- return i < NR_CPUS ? (void *) (i + 1) : NULL;
++ return i < nr_cpu_ids ? (void *) (i + 1) : NULL;
+ }
+
+ static void *c_next(struct seq_file *m, void *v, loff_t *pos)
--- /dev/null
+From 0c551abfa004ce154d487d91777bf221c808a64f Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
+Date: Wed, 6 Jul 2022 12:10:43 +0200
+Subject: powerpc/fsl-pci: Fix Class Code of PCIe Root Port
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+From: Pali Rohár <pali@kernel.org>
+
+commit 0c551abfa004ce154d487d91777bf221c808a64f upstream.
+
+By default old pre-3.0 Freescale PCIe controllers reports invalid PCI Class
+Code 0x0b20 for PCIe Root Port. It can be seen by lspci -b output on P2020
+board which has this pre-3.0 controller:
+
+ $ lspci -bvnn
+ 00:00.0 Power PC [0b20]: Freescale Semiconductor Inc P2020E [1957:0070] (rev 21)
+ !!! Invalid class 0b20 for header type 01
+ Capabilities: [4c] Express Root Port (Slot-), MSI 00
+
+Fix this issue by programming correct PCI Class Code 0x0604 for PCIe Root
+Port to the Freescale specific PCIe register 0x474.
+
+With this change lspci -b output is:
+
+ $ lspci -bvnn
+ 00:00.0 PCI bridge [0604]: Freescale Semiconductor Inc P2020E [1957:0070] (rev 21) (prog-if 00 [Normal decode])
+ Capabilities: [4c] Express Root Port (Slot-), MSI 00
+
+Without any "Invalid class" error. So class code was properly reflected
+into standard (read-only) PCI register 0x08.
+
+Same fix is already implemented in U-Boot pcie_fsl.c driver in commit:
+http://source.denx.de/u-boot/u-boot/-/commit/d18d06ac35229345a0af80977a408cfbe1d1015b
+
+Fix activated by U-Boot stay active also after booting Linux kernel.
+But boards which use older U-Boot version without that fix are affected and
+still require this fix.
+
+So implement this class code fix also in kernel fsl_pci.c driver.
+
+Cc: stable@vger.kernel.org
+Signed-off-by: Pali Rohár <pali@kernel.org>
+Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
+Link: https://lore.kernel.org/r/20220706101043.4867-1-pali@kernel.org
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ arch/powerpc/sysdev/fsl_pci.c | 8 ++++++++
+ arch/powerpc/sysdev/fsl_pci.h | 1 +
+ 2 files changed, 9 insertions(+)
+
+--- a/arch/powerpc/sysdev/fsl_pci.c
++++ b/arch/powerpc/sysdev/fsl_pci.c
+@@ -523,6 +523,7 @@ int fsl_add_bridge(struct platform_devic
+ struct resource rsrc;
+ const int *bus_range;
+ u8 hdr_type, progif;
++ u32 class_code;
+ struct device_node *dev;
+ struct ccsr_pci __iomem *pci;
+ u16 temp;
+@@ -596,6 +597,13 @@ int fsl_add_bridge(struct platform_devic
+ PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
+ if (fsl_pcie_check_link(hose))
+ hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
++ /* Fix Class Code to PCI_CLASS_BRIDGE_PCI_NORMAL for pre-3.0 controller */
++ if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0) {
++ early_read_config_dword(hose, 0, 0, PCIE_FSL_CSR_CLASSCODE, &class_code);
++ class_code &= 0xff;
++ class_code |= PCI_CLASS_BRIDGE_PCI_NORMAL << 8;
++ early_write_config_dword(hose, 0, 0, PCIE_FSL_CSR_CLASSCODE, class_code);
++ }
+ } else {
+ /*
+ * Set PBFR(PCI Bus Function Register)[10] = 1 to
+--- a/arch/powerpc/sysdev/fsl_pci.h
++++ b/arch/powerpc/sysdev/fsl_pci.h
+@@ -23,6 +23,7 @@ struct platform_device;
+
+ #define PCIE_LTSSM 0x0404 /* PCIE Link Training and Status */
+ #define PCIE_LTSSM_L0 0x16 /* L0 state */
++#define PCIE_FSL_CSR_CLASSCODE 0x474 /* FSL GPEX CSR */
+ #define PCIE_IP_REV_2_2 0x02080202 /* PCIE IP block version Rev2.2 */
+ #define PCIE_IP_REV_3_0 0x02080300 /* PCIE IP block version Rev3.0 */
+ #define PIWAR_EN 0x80000000 /* Enable */
--- /dev/null
+From 90b5d4fe0b3ba7f589c6723c6bfb559d9e83956a Mon Sep 17 00:00:00 2001
+From: Michael Ellerman <mpe@ellerman.id.au>
+Date: Thu, 28 Jul 2022 00:32:17 +1000
+Subject: powerpc/powernv: Avoid crashing if rng is NULL
+
+From: Michael Ellerman <mpe@ellerman.id.au>
+
+commit 90b5d4fe0b3ba7f589c6723c6bfb559d9e83956a upstream.
+
+On a bare-metal Power8 system that doesn't have an "ibm,power-rng", a
+malicious QEMU and guest that ignore the absence of the
+KVM_CAP_PPC_HWRNG flag, and calls H_RANDOM anyway, will dereference a
+NULL pointer.
+
+In practice all Power8 machines have an "ibm,power-rng", but let's not
+rely on that, add a NULL check and early return in
+powernv_get_random_real_mode().
+
+Fixes: e928e9cb3601 ("KVM: PPC: Book3S HV: Add fast real-mode H_RANDOM implementation.")
+Cc: stable@vger.kernel.org # v4.1+
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
+Link: https://lore.kernel.org/r/20220727143219.2684192-1-mpe@ellerman.id.au
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ arch/powerpc/platforms/powernv/rng.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/arch/powerpc/platforms/powernv/rng.c
++++ b/arch/powerpc/platforms/powernv/rng.c
+@@ -67,6 +67,8 @@ int powernv_get_random_real_mode(unsigne
+ struct powernv_rng *rng;
+
+ rng = raw_cpu_read(powernv_rng);
++ if (!rng)
++ return 0;
+
+ *v = rng_whiten(rng, __raw_rm_readq(rng->regs_real));
+
mbcache-don-t-reclaim-used-entries.patch
mbcache-add-functions-to-delete-entry-if-unused.patch
ia64-processor-fix-wincompatible-pointer-types-in-ia64_get_irr.patch
+powerpc-fsl-pci-fix-class-code-of-pcie-root-port.patch
+powerpc-powernv-avoid-crashing-if-rng-is-null.patch
+mips-cpuinfo-fix-a-warning-for-config_cpumask_offstack.patch
projects / thirdparty / kernel / stable-queue.git / commitdiff
