[Xen-devel] Re: [PATCH 12/12] xen/mtrr: Add mtrr_if support for Xen mtrr

["H. Peter Anvin" <hpa@xxxxxxxxx>]

On 09/28/2010 10:13 AM, Jeremy Fitzhardinge wrote:
> 
> Yes, we could just mask out the MTRR CPU feature and rely entirely on PAT.
> 
> The alternative would be to use the wrmsr hooks to emulate the Intel
> MTRR registers by mapping them to hypercalls, but that seems needlessly
> complex.
> 

Indeed.  Relying on pure PAT is the Right Thing[TM].

        -hpa


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