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Re: [Xen-devel] [PATCH 1/3] x86/vpmu: Calculate vpmu_enabled() based on vpmu_mode value

On 13/02/17 02:29, Boris Ostrovsky wrote:
> vpmu_enabled() is currently reported based on VPMU_CONTEXT_ALLOCATED
> bit of VPMU's flags. This presents a problem on Intel processors where
> VPMU context is allocated lazily, during the first access to VPMU MSRs.
> With such delayed allocation we, for example, cannot properly report
> CPUID's leaf 0xa since it is likely that the leaf is queried by a
> guest before the guest attempts ro read or write the MSR.
> Instead of keying vpmu_enabled() off the flags we should compute it
> based on vpmu_mode.
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>


Otherwise, Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

I can fix this up on commit if there are no other issues.


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