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

["Dong, Eddie" <eddie.dong@xxxxxxxxx>]

Keir Fraser 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? 
:-)

 
> If you need both then may as well enable both in the same
> patch. Just make
> it for pass-thru domains only, clean up the patch as I
> described before, and
> I'll be happy. Probably.
> 
Sure!

How about the initial MTRR value? Taking it easy, we can
do this when create a VCPU and leave future work to do in
Bochs BIOS. What is your opnion? in HVM loader from now?



thx,eddie

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