Re: [Xen-devel] [PATCH v2 1/3] x86/VPMU: Support only versions 2 through 4 of architectural performance monitoring

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Boris Ostrovsky [mailto:boris.ostrovsky@xxxxxxxxxx]
> Sent: Wednesday, December 02, 2015 12:50 AM
> 
> We need to have at least version 2 since it's the first version to
> support various control and status registers (such as
> MSR_CORE_PERF_GLOBAL_CTRL) that VPMU relies on always having.
> 
> Since we don't fully support version 4 yet report it as version 3 in
> CPUID.
> 
> With explicit testing for PMU version we can now remove CPUID model
> check.
> 
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>

Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>

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