linux-kernel - Re: [PATCH 0/2] KVM: x86/pmu: Globally enable GP counters at "RESET"

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Message-ID: <171262712105.1419825.3878505678593336929.b4-ty@google.com>
Date: Mon,  8 Apr 2024 19:01:29 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Babu Moger <babu.moger@....com>, Sandipan Das <sandipan.das@....com>, 
	Like Xu <like.xu.linux@...il.com>, Mingwei Zhang <mizhang@...gle.com>, 
	Dapeng Mi <dapeng1.mi@...ux.intel.com>
Subject: Re: [PATCH 0/2] KVM: x86/pmu: Globally enable GP counters at "RESET"

On Fri, 08 Mar 2024 17:36:39 -0800, Sean Christopherson wrote:
> Globally enable GP counters in PERF_GLOBAL_CTRL when refreshing a vCPU's
> PMU to emulate the architecturally defined post-RESET behavior of the MSR.
> 
> Extend pmu_counters_test.c to verify the behavior.
> 
> Note, this is slightly different than what I "posted" before: it keeps
> PERF_GLOBAL_CTRL '0' if there are no counters.  That's technically not
> what the SDM dictates, but I went with the common sense route of
> interpreting the SDM to mean "globally enable all GP counters".
> 
> [...]

Applied to kvm-x86 fixes, thanks!

[1/2] KVM: x86/pmu: Set enable bits for GP counters in PERF_GLOBAL_CTRL at "RESET"
      https://github.com/kvm-x86/linux/commit/de120e1d692d
[2/2] KVM: selftests: Verify post-RESET value of PERF_GLOBAL_CTRL in PMCs test
      https://github.com/kvm-x86/linux/commit/08a828249b16

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