Messages in this thread Patch in this message | | | From | Borislav Petkov <> | Subject | [PATCH 2/2] x86, microcode, AMD: Add microcode revision to /proc/cpuinfo | Date | Mon, 17 Oct 2011 17:25:15 +0200 |
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From: Borislav Petkov <borislav.petkov@amd.com>
Enable microcode revision output for AMD after 506ed6b53e00ba303ad778122f08e1fca7cf5efb did it for Intel.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> --- arch/x86/kernel/cpu/amd.c | 4 ++++ arch/x86/kernel/microcode_amd.c | 5 +++-- 2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index b13ed39..c193b8d 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -412,6 +412,8 @@ static void __cpuinit early_init_amd_mc(struct cpuinfo_x86 *c) static void __cpuinit early_init_amd(struct cpuinfo_x86 *c) { + u32 dummy; + early_init_amd_mc(c); /* @@ -446,6 +448,8 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c) if (c != &boot_cpu_data) return; + rdmsr(MSR_AMD64_PATCH_LEVEL, c->microcode, dummy); + if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) { if (c->x86 > 0x10 || diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c index 591be0e..d494799 100644 --- a/arch/x86/kernel/microcode_amd.c +++ b/arch/x86/kernel/microcode_amd.c @@ -74,14 +74,13 @@ static struct equiv_cpu_entry *equiv_cpu_table; static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig) { struct cpuinfo_x86 *c = &cpu_data(cpu); - u32 dummy; if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) { pr_warning("CPU%d: family %d not supported\n", cpu, c->x86); return -1; } - rdmsr(MSR_AMD64_PATCH_LEVEL, csig->rev, dummy); + csig->rev = c->microcode; pr_info("CPU%d: patch_level=0x%08x\n", cpu, csig->rev); return 0; @@ -130,6 +129,7 @@ static int apply_microcode_amd(int cpu) int cpu_num = raw_smp_processor_id(); struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num; struct microcode_amd *mc_amd = uci->mc; + struct cpuinfo_x86 *c = &cpu_data(cpu); /* We should bind the task to the CPU */ BUG_ON(cpu_num != cpu); @@ -150,6 +150,7 @@ static int apply_microcode_amd(int cpu) pr_info("CPU%d: new patch_level=0x%08x\n", cpu, rev); uci->cpu_sig.rev = rev; + c->microcode = rev; return 0; } -- 1.7.4.rc2
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