From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: Sean Christopherson <seanjc@google.com>
Cc: Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Like Xu <likexu@tencent.com>, Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [PATCH 6/7] KVM: x86: Ignore benign host accesses to "unsupported" PEBS and BTS MSRs
Date: Tue, 14 Jun 2022 09:45:01 +0200 [thread overview]
Message-ID: <875yl3k7sy.fsf@redhat.com> (raw)
In-Reply-To: <20220611005755.753273-7-seanjc@google.com>
Sean Christopherson <seanjc@google.com> writes:
> Ignore host userspace reads and writes of '0' to PEBS and BTS MSRs that
> KVM reports in the MSR-to-save list, but the MSRs are ultimately
> unsupported. All MSRs in said list must be writable by userspace, e.g.
> if userspace sends the list back at KVM without filtering out the MSRs it
> doesn't need.
>
> 8183a538cd95 ("KVM: x86/pmu: Add IA32_DS_AREA MSR emulation to support guest DS")
> 902caeb6841a ("KVM: x86/pmu: Add PEBS_DATA_CFG MSR emulation to support adaptive PEBS")
> c59a1f106f5c ("KVM: x86/pmu: Add IA32_PEBS_ENABLE MSR emulation for extended PEBS")
These are 'Fixes:' tags I suppose?
...
--
Vitaly
next prev parent reply other threads:[~2022-06-14 7:45 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-11 0:57 [PATCH 0/7] KVM: x86: Attempt to wrangle PEBS/PMU into submission Sean Christopherson
2022-06-11 0:57 ` [PATCH 1/7] KVM: x86: Give host userspace full control of MSR_IA32_MISC_ENABLES Sean Christopherson
2022-06-15 7:10 ` [KVM] [confidence: ] f2712bd257: kvm-unit-tests.msr.fail kernel test robot
2022-06-15 7:10 ` kernel test robot
2022-06-11 0:57 ` [PATCH 2/7] KVM: VMX: Give host userspace full control of MSR_IA32_PERF_CAPABILITIES Sean Christopherson
2022-06-11 0:57 ` [PATCH 3/7] Revert "KVM: x86/pmu: Accept 0 for absent PMU MSRs when host-initiated if !enable_pmu" Sean Christopherson
2022-06-11 0:57 ` [PATCH 4/7] Revert "KVM: x86: always allow host-initiated writes to PMU MSRs" Sean Christopherson
2022-06-11 0:57 ` [PATCH 5/7] KVM: VMX: Use vcpu_get_perf_capabilities() to get guest-visible value Sean Christopherson
2022-06-11 0:57 ` [PATCH 6/7] KVM: x86: Ignore benign host accesses to "unsupported" PEBS and BTS MSRs Sean Christopherson
2022-06-13 14:09 ` Sean Christopherson
2022-06-20 14:29 ` Paolo Bonzini
2022-06-14 7:45 ` Vitaly Kuznetsov [this message]
2022-06-11 0:57 ` [PATCH 7/7] KVM: x86: Ignore benign host writes to "unsupported" F15H_PERF_CTL MSRs Sean Christopherson
2022-06-20 14:31 ` [PATCH 0/7] KVM: x86: Attempt to wrangle PEBS/PMU into submission Paolo Bonzini
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