Re: [Xen-devel] [PATCH v2 2/3] x86 Test and expose CPUID faulting capabilities in /proc/cpuinfo

[Kyle Huey]

On Thu, Sep 15, 2016 at 3:25 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
>>>> On 15.09.16 at 12:05, <david.vrabel@xxxxxxxxxx> wrote:
>> On 14/09/16 22:01, Kyle Huey wrote:
>>> Xen advertises the underlying support for CPUID faulting but not does pass
>>> through writes to the relevant MSR, nor does it virtualize it, so it does
>>> not actually work. For now mask off the relevant bit on MSR_PLATFORM_INFO.
>>
>> Could you clarify in the commit message that it is PV guests that are
>> affected.
>
> What makes you think HVM ones aren't?

Testing on EC2, HVM guests are affected as well.  Not sure what to do
about that.

- Kyle