Re: [Xen-devel] mapping of memory below 16Mb

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 24/1/08 16:35, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

>> That's a dom0 issue. Xen itself does not proactively mess with the MTRRs.
> 
> Yes and no: Yes in the sense that Dom0 could be given an alternative
> hypercall to specify memory types. No in the sense that we already have
> such a hypercall (setting the MTRRs) that would simply need to do
> translation to PAT semantics rather than writing to the MTRR MSRs.

If Linux is getting native PAT support, then we shouldn't need MTRR->PAT
shimming code in Xen. And thank goodness for that!

 -- Keir



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