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authorKevin Winchester <kjwinchester@gmail.com>2009-08-10 19:56:45 -0300
committerIngo Molnar <mingo@elte.hu>2009-08-11 13:34:54 +0200
commitfbd8b1819e80ac5a176d085fdddc3a34d1499318 (patch)
tree7b2d450a6f64808ccf5bc6f8049a877c8db86ff0 /kernel/exit.c
parent0d01f31439c1e4d602bf9fdc924ab66f407f5e38 (diff)
x86: Clear incorrectly forced X86_FEATURE_LAHF_LM flag
Due to an erratum with certain AMD Athlon 64 processors, the BIOS may need to force enable the LAHF_LM capability. Unfortunately, in at least one case, the BIOS does this even for processors that do not support the functionality. Add a specific check that will clear the feature bit for processors known not to support the LAHF/SAHF instructions. Signed-off-by: Kevin Winchester <kjwinchester@gmail.com> Acked-by: Borislav Petkov <petkovbb@googlemail.com> LKML-Reference: <4A80A5AD.2000209@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/exit.c')
0 files changed, 0 insertions, 0 deletions