x86, AMD: Disable wrongly set X86_FEATURE_LAHF_LM CPUID bit
fbd8b181 turns off the bit for /proc/cpuinfo. However, a proper/full fix would be to additionally turn off the bit in the CPUID output so that future callers get correct CPU features info. Do that by basically reversing what the BIOS wrongfully does at boot. Signed-off-by: NBorislav Petkov <borislav.petkov@amd.com> LKML-Reference: <1251705011-18636-3-git-send-email-petkovbb@gmail.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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