linux-kernel - Re: [PATCH v2] KVM: x86/pmu: Support full width counting

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Date:   Fri, 8 May 2020 11:52:26 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     like.xu@...el.com, Like Xu <like.xu@...ux.intel.com>
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] KVM: x86/pmu: Support full width counting

On 08/05/20 10:42, Xu, Like wrote:
>> Given the bugs, it is clear that you should also modify the pmu.c
>> testcase for kvm-unit-tests to cover full-width writes (and especially
>> the non-full-width write behavior of MSR_IA32_PERFCTRn).  Even before
>> the QEMU side is begin worked on, you can test it with "-cpu
>> host,migratable=off".
>
> Sure, I added some testcases in pmu.c to cover this feature.
> 
> Please review the v3 patch
> https://lore.kernel.org/kvm/20200508083218.120559-1-like.xu@linux.intel.com/
> 
> as well as the kvm-unit-tests testcase.

Awesome, thanks for the quick reply!

Paolo