Re: [Xen-devel] [PATCH] VMX: Eliminate cr3 store/load vmexit when UG enabled

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 29.10.13 at 02:02, "Zhang, Yang Z" <yang.z.zhang@xxxxxxxxx> wrote:
> Jan Beulich wrote on 2013-10-28:
>>>>> On 24.10.13 at 06:41, "Zhang, Yang Z" <yang.z.zhang@xxxxxxxxx> wrote:
>>> Andrew Cooper wrote on 2013-10-23:
>>>> On 23/10/13 08:39, Yang Zhang wrote:
>>>>> From: Yang Zhang <yang.z.zhang@xxxxxxxxx>
>>>>> 
>>>>> With the feature of unrestricted guest, there should no vmexit be
>>>>> triggered when guest accesses the cr3 in non-paging mode.
>>>>> 
>>>>> Signed-off-by: Yang Zhang <yang.z.zhang@xxxxxxxxx>
>>>> 
>>>> You English here confused me for a bit.  I presume you mean "Xen
>>>> should not cause vmexits for cr3 accesses in unrestricted guests",
>>>> whereas the current meaning implies that hardware wont generate a
>>>> vmexit for cr3 accesses for unrestricted guests (which is not correct
>>>> according to the SDM).
>>>> 
>>> 
>>> Apology for my poor English. Yes, your understanding is right.
>> 
>> So assuming we'll get an ack from one of the VMX maintainers, should
>> this then be committed with the suggested change to the description?
> 
> Sure. If no need to revise the current patch, please help to commit it with 
> the comments Paolo suggested.

Andrew you mean?

Jan


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