Re: [PATCH 3/3] x86, AMD: Disable wrongly set X86_FEATURE_LAHF_LM CPUID bit

H. Peter Anvin
2009-08-30T19:23:14Z

On 08/30/2009 04:50 AM, Borislav Petkov wrote:
> clear_cpu_cap(c, X86_FEATURE_LAHF_LM);
> + if (!rdmsrl_amd_safe(0xc001100d, &val)) {
> + val &= ~(1ULL << 32);
> + wrmsr_amd_safe(0xc001100d, (u32) val,
> + (u32)(val >> 32));
> + }
> + }

We presumably want/need wrmsrl_amd_safe() here!

-hpa

--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.