Re: [PATCH 3/3] x86, AMD: Disable wrongly set X86_FEATURE_LAHF_LMCPUID bit

From: Borislav Petkov
Date: Mon Aug 31 2009 - 03:34:50 EST

On Sun, Aug 30, 2009 at 01:48:49PM -0700, H. Peter Anvin wrote:
> On 08/30/2009 01:29 PM, Borislav Petkov wrote:
> >
> > Ok, what do we want actually? We have rdmsr_safe and rdmsrl_safe where
> > the last one engineers the 2 u32s into a u64. My gut feeling would opt
> > for the 2 32bit values instead of one 64bit since they're naturally
> > returned into %eax:%edx. And in the most cases we need only one of the
> > values. However, the MSRs themselves are 64bit... Hmmm...
> >
> The 2x32 bit interface is the legacy interface. It turned out to be a
> bad idea, but it's hard to clean up all the users.

Ok, fixed. All other small-ish problems addressed too.

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