Re: [RFC PATCH v3 27/58] KVM: x86/pmu: Create a function prototype to disable MSR interception

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Subject: Re: [RFC PATCH v3 27/58] KVM: x86/pmu: Create a function prototype to disable MSR interception
From: "Mi, Dapeng" <dapeng1.mi@xxxxxxxxxxxxxxx>
Date: Wed, 20 Nov 2024 15:57:22 +0800
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>, Xiong Zhang <xiong.y.zhang@xxxxxxxxx>, Kan Liang <kan.liang@xxxxxxxxx>, Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>, Manali Shukla <manali.shukla@xxxxxxx>, Sandipan Das <sandipan.das@xxxxxxx>, Jim Mattson <jmattson@xxxxxxxxxx>, Stephane Eranian <eranian@xxxxxxxxxx>, Ian Rogers <irogers@xxxxxxxxxx>, Namhyung Kim <namhyung@xxxxxxxxxx>, gce-passthrou-pmu-dev@xxxxxxxxxx, Samantha Alt <samantha.alt@xxxxxxxxx>, Zhiyuan Lv <zhiyuan.lv@xxxxxxxxx>, Yanfei Xu <yanfei.xu@xxxxxxxxx>, Like Xu <like.xu.linux@xxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Raghavendra Rao Ananta <rananta@xxxxxxxxxx>, kvm@xxxxxxxxxxxxxxx, linux-perf-users@xxxxxxxxxxxxxxx
In-reply-to: <ZzzWLyhFmwSON6K6@google.com>
References: <20240801045907.4010984-1-mizhang@google.com> <20240801045907.4010984-28-mizhang@google.com> <ZzzWLyhFmwSON6K6@google.com>
User-agent: Mozilla Thunderbird

On 11/20/2024 2:17 AM, Sean Christopherson wrote:
> On Thu, Aug 01, 2024, Mingwei Zhang wrote:
>> Add one extra pmu function prototype in kvm_pmu_ops to disable PMU MSR
>> interception.
> This hook/patch should be unnecessary, the logic belongs in the vendor refresh()
> callback.

Yes.

References:
- [RFC PATCH v3 00/58] Mediated Passthrough vPMU 3.0 for x86
  - From: Mingwei Zhang
- [RFC PATCH v3 27/58] KVM: x86/pmu: Create a function prototype to disable MSR interception
  - From: Mingwei Zhang
- Re: [RFC PATCH v3 27/58] KVM: x86/pmu: Create a function prototype to disable MSR interception
  - From: Sean Christopherson

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