linux-kernel - [PATCH 5/9] KVM: VMX: Remove restriction that PMU version > 0 for PERF

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Message-ID: <20240802185511.305849-6-seanjc@google.com>
Date: Fri,  2 Aug 2024 11:55:07 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>, Sean Christopherson <seanjc@...gle.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 5/9] KVM: VMX: Remove restriction that PMU version > 0 for PERF_CAPABILITIES

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@...gle.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