linux-kernel - Re: [PATCH v2 0/2] KVM: x86: Fix MSR_IA32_PERF_CAPABILITIES writes check and vmx_pmu_msrs

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Date:   Sun, 19 Dec 2021 20:24:25 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>, kvm@...r.kernel.org
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>, oliver.sang@...el.com,
        Like Xu <like.xu@...ux.intel.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] KVM: x86: Fix MSR_IA32_PERF_CAPABILITIES writes
 check and vmx_pmu_msrs_test

On 12/16/21 17:52, Vitaly Kuznetsov wrote:
> This is a continuation of "KVM: selftests: Avoid KVM_SET_CPUID2 after
> KVM_RUN in vmx_pmu_msrs_test" work. Instead of fixing the immediate issue,
> drop incorrect check in KVM which was making the result of host initiated
> writes to MSR_IA32_PERF_CAPABILITIES dependent on guest visible CPUIDs and
> the corresponding tests in vmx_pmu_msrs_test, this will also make the issue
> reported by kernel test robot to go away.
> 
> Vitaly Kuznetsov (2):
>    KVM: selftests: vmx_pmu_msrs_test: Drop tests mangling guest visible
>      CPUIDs
>    KVM: x86: Drop guest CPUID check for host initiated writes to
>      MSR_IA32_PERF_CAPABILITIES
> 
>   arch/x86/kvm/x86.c                              |  2 +-
>   .../selftests/kvm/x86_64/vmx_pmu_msrs_test.c    | 17 -----------------
>   2 files changed, 1 insertion(+), 18 deletions(-)
> 

Queued, thanks,

Paolo