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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-09-04 17:45:41 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-09-04 17:45:41 +0200 |
| commit | 9ca581b50dab6103183396852cc08e440fcda18e (patch) | |
| tree | 029775bfe0ce0adcce7f0dd7f1ca8f98efe1768c | |
| parent | Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/... (diff) | |
| parent | x86/AMD: Apply erratum 665 on machines without a BIOS fix (diff) | |
| download | linux-9ca581b50dab6103183396852cc08e440fcda18e.tar.xz linux-9ca581b50dab6103183396852cc08e440fcda18e.zip | |
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fix from Thomas Gleixner:
"A single fix for an AMD erratum so machines without a BIOS fix work"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/AMD: Apply erratum 665 on machines without a BIOS fix
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index f5c69d8974e1..b81fe2d63e15 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -669,6 +669,17 @@ static void init_amd_gh(struct cpuinfo_x86 *c) set_cpu_bug(c, X86_BUG_AMD_TLB_MMATCH); } +#define MSR_AMD64_DE_CFG 0xC0011029 + +static void init_amd_ln(struct cpuinfo_x86 *c) +{ + /* + * Apply erratum 665 fix unconditionally so machines without a BIOS + * fix work. + */ + msr_set_bit(MSR_AMD64_DE_CFG, 31); +} + static void init_amd_bd(struct cpuinfo_x86 *c) { u64 value; @@ -726,6 +737,7 @@ static void init_amd(struct cpuinfo_x86 *c) case 6: init_amd_k7(c); break; case 0xf: init_amd_k8(c); break; case 0x10: init_amd_gh(c); break; + case 0x12: init_amd_ln(c); break; case 0x15: init_amd_bd(c); break; } |