diff options
| author | Borislav Petkov <bp@suse.de> | 2014-12-01 11:12:21 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-12-01 11:51:05 +0100 |
| commit | 2ef84b3bb97f03332f0c1edb4466b1750dcf97b5 (patch) | |
| tree | ad10420bec232c18c734b9100984794844574b15 | |
| parent | 009d0431c3914de64666bec0d350e54fdd59df6a (diff) | |
| download | linux-2ef84b3bb97f03332f0c1edb4466b1750dcf97b5.tar.gz linux-2ef84b3bb97f03332f0c1edb4466b1750dcf97b5.tar.bz2 linux-2ef84b3bb97f03332f0c1edb4466b1750dcf97b5.zip | |
x86, microcode, AMD: Do not use smp_processor_id() in preemtible context
Hand down the cpu number instead, otherwise lockdep screams when doing
echo 1 > /sys/devices/system/cpu/microcode/reload.
BUG: using smp_processor_id() in preemptible [00000000] code: amd64-microcode/2470
caller is debug_smp_processor_id+0x12/0x20
CPU: 1 PID: 2470 Comm: amd64-microcode Not tainted 3.18.0-rc6+ #26
...
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1417428741-4501-1-git-send-email-bp@alien8.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | arch/x86/include/asm/microcode_amd.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/amd.c | 8 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/amd_early.c | 2 |
3 files changed, 6 insertions, 6 deletions
diff --git a/arch/x86/include/asm/microcode_amd.h b/arch/x86/include/asm/microcode_amd.h index b7b10b82d3e5..48a48024ebe4 100644 --- a/arch/x86/include/asm/microcode_amd.h +++ b/arch/x86/include/asm/microcode_amd.h @@ -59,7 +59,7 @@ static inline u16 find_equiv_id(struct equiv_cpu_entry *equiv_cpu_table, extern int __apply_microcode_amd(struct microcode_amd *mc_amd); extern int apply_microcode_amd(int cpu); -extern enum ucode_state load_microcode_amd(u8 family, const u8 *data, size_t size); +extern enum ucode_state load_microcode_amd(int cpu, u8 family, const u8 *data, size_t size); #define PATCH_MAX_SIZE PAGE_SIZE extern u8 amd_ucode_patch[PATCH_MAX_SIZE]; diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c index 8fffd845e22b..bfbbe6195e2d 100644 --- a/arch/x86/kernel/cpu/microcode/amd.c +++ b/arch/x86/kernel/cpu/microcode/amd.c @@ -376,7 +376,7 @@ static enum ucode_state __load_microcode_amd(u8 family, const u8 *data, return UCODE_OK; } -enum ucode_state load_microcode_amd(u8 family, const u8 *data, size_t size) +enum ucode_state load_microcode_amd(int cpu, u8 family, const u8 *data, size_t size) { enum ucode_state ret; @@ -390,8 +390,8 @@ enum ucode_state load_microcode_amd(u8 family, const u8 *data, size_t size) #if defined(CONFIG_MICROCODE_AMD_EARLY) && defined(CONFIG_X86_32) /* save BSP's matching patch for early load */ - if (cpu_data(smp_processor_id()).cpu_index == boot_cpu_data.cpu_index) { - struct ucode_patch *p = find_patch(smp_processor_id()); + if (cpu_data(cpu).cpu_index == boot_cpu_data.cpu_index) { + struct ucode_patch *p = find_patch(cpu); if (p) { memset(amd_ucode_patch, 0, PATCH_MAX_SIZE); memcpy(amd_ucode_patch, p->data, min_t(u32, ksize(p->data), @@ -444,7 +444,7 @@ static enum ucode_state request_microcode_amd(int cpu, struct device *device, goto fw_release; } - ret = load_microcode_amd(c->x86, fw->data, fw->size); + ret = load_microcode_amd(cpu, c->x86, fw->data, fw->size); fw_release: release_firmware(fw); diff --git a/arch/x86/kernel/cpu/microcode/amd_early.c b/arch/x86/kernel/cpu/microcode/amd_early.c index 06674473b0e6..3d988a30a21d 100644 --- a/arch/x86/kernel/cpu/microcode/amd_early.c +++ b/arch/x86/kernel/cpu/microcode/amd_early.c @@ -389,7 +389,7 @@ int __init save_microcode_in_initrd_amd(void) eax = cpuid_eax(0x00000001); eax = ((eax >> 8) & 0xf) + ((eax >> 20) & 0xff); - ret = load_microcode_amd(eax, container, container_size); + ret = load_microcode_amd(smp_processor_id(), eax, container, container_size); if (ret != UCODE_OK) retval = -EINVAL; |