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x86, microcode, AMD: Add microcode revision to /proc/cpuinfo 

Enable microcode revision output for AMD after 506ed6b53e ("x86,
intel: Output microcode revision in /proc/cpuinfo") did it for Intel.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
This commit is contained in:
Borislav Petkov 2011-10-17 16:34:36 +02:00
parent 881e23e567
commit bcb80e5387
2 changed files with 7 additions and 2 deletions
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4
arch/x86/kernel/cpu/amd.c
View File

@ -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);
/*
@ -442,6 +444,8 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
}
#endif
rdmsr_safe(MSR_AMD64_PATCH_LEVEL, &c->microcode, &dummy);
/* We need to do the following only once */
if (c != &boot_cpu_data)
return;

5
arch/x86/kernel/microcode_amd.c
View File

@ -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;
}