RE: [Xen-devel][PATCH 2/2] Enhance MTRR/PAT virtualization for EPT & VT-d enabled both

["Xin, Xiaohui" <xiaohui.xin@xxxxxxxxx>]

The new flag is used to not to reconstruct vt-d page tables when guest tried to 
set MTRR range. At that time, we called hvm_set_uc_mode() to refill the emt 
fied of EPT entries. But we don't need to reconstruct the vt-d page tables. It 
costs too much especially when guest memory is large. Basically, the vt-d page 
table is constructed when p2m tables is created which during the domain 
creation time, so we may skip the step during hvm_set_uc_mode().

Thanks
Xiaohui

>-----Original Message-----
>From: Keir Fraser [mailto:keir.fraser@xxxxxxxxxxxxx]
>Sent: 2009年1月22日 18:16
>To: Xin, Xiaohui; xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [Xen-devel][PATCH 2/2] Enhance MTRR/PAT virtualization for EPT &
>VT-d enabled both
>
>You add a new flag 'is_untaint'. What is tainted/untainted? No comment and
>not a descriptive field name.
>
> -- Keir
>
>On 22/01/2009 09:48, "Xin, Xiaohui" <xiaohui.xin@xxxxxxxxx> wrote:
>
>> The patch attached is to set effective memory type for EPT according to the
>> VT-d snoop control capability, and also includes some cleansup for EPT & VT-d
>> both enabled.
>>
>> Signed-off-by: Zhai, Edwin Edwin.Zhai@xxxxxxxxx
>>
>> Signed-off-by: Xin, Xiaohui xiaohui.xin@xxxxxxxxx
>>
>>
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-devel
>

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