Re: [PATCH] x86 boot time check for cpu features

From: Brian Gerst (bgerst@didntduck.org)
Date: Fri Nov 03 2000 - 20:28:59 EST

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Alan Cox wrote:
>
> > Alan Cox wrote:
> > > Q: are any of the things you test present in processors only after we
> > > do magic 'cpuid' enable invocations ?
> >
> > Hmm, after a bit more investigation, it appears that the Cyrix MII
> > processors support cmov instructions, even though we currently don't
> > compile for that processor with -march=i686. Please ignore this patch
> > until I can come up with something better.
>
> I believe the MII always has CPUID enabled. It was the older Cyrixes that did
> not. DaveJ is the guru..

Well, according to comments in bugs.h, some broken BIOSes disable cpuid.

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