Re: [Xen-devel] [PATCH 0/2] MTRR/PAT virtualization

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 9/10/07 16:30, "Dong, Eddie" <eddie.dong@xxxxxxxxx> wrote:

>>> BTW, if we don't remove those fixed 1:1 mapping, even without MTRR
>>> patch, we may meet problem in future when there are complicated
>>> drivers in domain0. E.g. high end graphics driver in domain0 may use
>>> UC for its batch buffer, same for audio driver and other PCIe
>>> drivers in future. Processor will see 2 different memory attribute
>>> in its direct page table.
>> 
>> Yup. Jan Beulich posted a patch some time ago. At least some variant
>> of that is certainly needed and I plan to put that in before 3.2.0.
> 
> So we can rely on you for this change, right?

Yeah. It'll be specific to PV domains with I/O privileges though.

 -- Keir


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