From: Sean Christopherson <seanjc@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 5/9] KVM: VMX: Remove restriction that PMU version > 0 for PERF_CAPABILITIES
Date: Fri, 2 Aug 2024 11:55:07 -0700 [thread overview]
Message-ID: <20240802185511.305849-6-seanjc@google.com> (raw)
In-Reply-To: <20240802185511.305849-1-seanjc@google.com>
Drop the restriction that the PMU version is non-zero when handling writes
to PERF_CAPABILITIES now that KVM unconditionally checks for PDCM support.
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/kvm/vmx/vmx.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index c1d06f800b8e..f636d811bdc1 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2460,8 +2460,6 @@ int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
vmx->pt_desc.guest.addr_a[index / 2] = data;
break;
case MSR_IA32_PERF_CAPABILITIES:
- if (data && !vcpu_to_pmu(vcpu)->version)
- return 1;
if (data & PMU_CAP_LBR_FMT) {
if ((data & PMU_CAP_LBR_FMT) !=
(kvm_caps.supported_perf_cap & PMU_CAP_LBR_FMT))
--
2.46.0.rc2.264.g509ed76dc8-goog
next prev parent reply other threads:[~2024-08-02 18:55 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-02 18:55 [PATCH 0/9] KVM: x86: Add a quirk for feature MSR initialization Sean Christopherson
2024-08-02 18:55 ` [PATCH 1/9] KVM: x86: Co-locate initialization of feature MSRs in kvm_arch_vcpu_create() Sean Christopherson
2024-08-02 18:55 ` [PATCH 2/9] KVM: x86: Disallow changing MSR_PLATFORM_INFO after vCPU has run Sean Christopherson
2024-08-02 18:55 ` [PATCH 3/9] KVM: x86: Quirk initialization of feature MSRs to KVM's max configuration Sean Christopherson
2024-08-02 18:55 ` [PATCH 4/9] KVM: x86: Reject userspace attempts to access PERF_CAPABILITIES w/o PDCM Sean Christopherson
2024-08-02 18:55 ` Sean Christopherson [this message]
2024-08-02 18:55 ` [PATCH 6/9] KVM: x86: Reject userspace attempts to access ARCH_CAPABILITIES w/o support Sean Christopherson
2024-08-02 18:55 ` [PATCH 7/9] KVM: x86: Remove ordering check b/w MSR_PLATFORM_INFO and MISC_FEATURES_ENABLES Sean Christopherson
2024-08-02 18:55 ` [PATCH 8/9] KVM: selftests: Verify get/set PERF_CAPABILITIES w/o guest PDMC behavior Sean Christopherson
2024-08-02 18:55 ` [PATCH 9/9] KVM: selftests: Add a testcase for disabling feature MSRs init quirk Sean Christopherson
2024-10-31 19:51 ` [PATCH 0/9] KVM: x86: Add a quirk for feature MSR initialization Sean Christopherson
2024-11-01 19:23 ` Sean Christopherson
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