Re: [Xen-devel] [PATCH] x86emul: don't allow INVLPG in real mode

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 22.04.16 at 16:40, <wei.liu2@xxxxxxxxxx> wrote:
> On Fri, Apr 22, 2016 at 08:17:35AM -0600, Jan Beulich wrote:
>> As both INVLPG and INVLPGA have basically the same exception rules
>> (leaving aside that INVLPGA requires SVME enabled, which so far isn't
>> being taken care of, and that INVLPG requires ModRM.mod != 3), fold
>> the handling of the two as much as possible alongside achieving the
>> goal of the patch (at once doing the #UD checks pror to the #GP one,
>> which ought to be more in line with how hardware does things).
>> 
>> But please note that AMD and Intel disagree on what exceptions INVLPG
>> may raise, and the more reasonable Intel variant is being followed.
>> 
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>> 
> 
> So this patch supersedes Andrew's patch to fix invlpg on AMD with shadow
> paging?

No, it is addressing an issue I found while reviewing Andrew's.

Jan


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