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| author | Paul Mundt <lethal@linux-sh.org> | 2009-08-15 13:00:02 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-08-15 13:00:02 +0900 |
| commit | 4b6b987969b076298485697bfb0d0e35502642a3 (patch) | |
| tree | a8f5ebd6a0b9efbe30272012d759669b0c5ddc13 /arch/x86/kernel/cpu/amd.c | |
| parent | df47cd096c8f54a5242e3a2ffb4525c804567eda (diff) | |
| parent | 60e0a4c7adc700f2d2929cdb2d0055e519a3eb3d (diff) | |
Merge branch 'master' into sh/hwblk
Diffstat (limited to 'arch/x86/kernel/cpu/amd.c')
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index e2485b03f1c..63fddcd082c 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -400,6 +400,13 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) level = cpuid_eax(1); if((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58) set_cpu_cap(c, X86_FEATURE_REP_GOOD); + + /* + * Some BIOSes incorrectly force this feature, but only K8 + * revision D (model = 0x14) and later actually support it. + */ + if (c->x86_model < 0x14) + clear_cpu_cap(c, X86_FEATURE_LAHF_LM); } if (c->x86 == 0x10 || c->x86 == 0x11) set_cpu_cap(c, X86_FEATURE_REP_GOOD); |