Re: [Xen-devel] [PATCH 1/3] Nested VMX: update nested paging mode when vmswitch is in progress

["Egger, Christoph" <chegger@xxxxxxxxx>]

On 14.01.14 08:38, Zhang, Yang Z wrote:
> Jan Beulich wrote on 2014-01-14:
>>>>> On 14.01.14 at 03:33, "Zhang, Yang Z" <yang.z.zhang@xxxxxxxxx> wrote:
>>> Zhang, Yang Z wrote on 2013-12-24:
>>>
>>> Any comments ?
>>
>> Considering Christoph's comments and reservations, if you can't alone
>> deal with this I think you should work with the AMD people to
>> eliminate or address his concerns.
>>
> 
> Yes. But the problem puzzled me is that Christoph said nested SVM works
> well w/o my patch which I cannot understand. Because according my analysis
> in previous thread, it also buggy in AMD side. But if they really solved
> the issue in their side, I wonder how they fix it. Perhaps I can use the
> same solution in VMX side without touch the common code.
> 
> Christoph, can you help to check it? thanks.

The fix I mentioned solves the vmswitch problem on AMD side.
The page mode problem you discovered is a seperate issue for
both SVM and VMX that needs to be addressed.

Christoph


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