linux-kernel - Re: [PATCH v4 00/12] KVM: x86: Add AMD Guest PerfMonV2 PMU support

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Message-ID: <168083228231.867070.5028004042976729728.b4-ty@google.com>
Date:   Thu,  6 Apr 2023 19:02:27 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Like Xu <like.xu.linux@...il.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 00/12] KVM: x86: Add AMD Guest PerfMonV2 PMU support

On Tue, 14 Feb 2023 13:07:45 +0800, Like Xu wrote:
> Starting with Zen4, core PMU on AMD platforms such as Genoa and
> Ryzen-7000 will support PerfMonV2, and it is also compatible with
> legacy PERFCTR_CORE behavior and msr addresses.
> 
> If you don't have access to the hardware specification, the commits
> d6d0c7f681fd..7685665c390d for host perf can also bring a quick
> overview. Its main change is the addition of three msr's equivalent
> to Intel V2, namely global_ctrl, global_status, global_status_clear.
> 
> [...]

Applied 1-3 to kvm-x86 pmu.  Note, I grabbed my full version of patch 2 that
also converts the "get" path.

My apologies for not reviewing this earlier in the cycle.  I need to pivot to
TDX+SNP stuff "soon", so AMD v2 support will likely miss 6.4, but I'll prioritize
reviewing and merging support in 6.5.

Thanks!

[01/12] KVM: x86/pmu: Rename pmc_is_enabled() to pmc_is_globally_enabled()
        https://github.com/kvm-x86/linux/commit/cdd2fbf6360e
[02/12] KVM: VMX: Refactor intel_pmu_{g,}set_msr() to align with other helpers
        https://github.com/kvm-x86/linux/commit/8bca8c5ce40b
[03/12] KVM: x86/pmu: Rewrite reprogram_counters() to improve performance
        https://github.com/kvm-x86/linux/commit/649bccd7fac9

--
https://github.com/kvm-x86/linux/tree/next
https://github.com/kvm-x86/linux/tree/fixes