Re: [X86] Add recent Centaur CPUs to PAT whitelist
From: H. Peter Anvin
Date: Thu May 22 2008 - 12:49:37 EST
Dave Jones wrote:
On Wed, May 21, 2008 at 04:56:28PM -0700, H. Peter Anvin wrote:
> Dave Jones wrote:
> > From conversation with Centaur engineers, both the newer generations
> > of the VIA C7, and their future CPUs support PAT, with no known errata.
> > Signed-off-by: Dave Jones <davej@xxxxxxxxxx>
> Question: are there any VIA CPUs that display the PAT CPUID flag that
> aren't covered by the above?
No. They only added PAT support with the current Esther (C7) generation iirc.
OK, so we should just enable VIA unconditionally as long as PAT is
displayed and not worry about generation numbers; same with Transmeta
(only the Transmeta Efficeon supported PAT, and it had a
strictly-coherent memory system.)
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