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Reply-To: Sean Christopherson <seanjc@google.com>
Date:   Thu,  6 Oct 2022 00:03:13 +0000
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Message-ID: <20221006000314.73240-8-seanjc@google.com>
Subject: [PATCH v5 7/8] KVM: x86: Handle PERF_CAPABILITIES in common x86's kvm_get_msr_feature()
From:   Sean Christopherson <seanjc@google.com>
To:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Sean Christopherson <seanjc@google.com>,
        Paolo Bonzini <pbonzini@redhat.com>
Cc:     Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
        kvm@vger.kernel.org, Like Xu <like.xu.linux@gmail.com>
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Precedence: bulk

Handle PERF_CAPABILITIES directly in kvm_get_msr_feature() now that the
supported value is available in kvm_caps.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kvm/svm/svm.c | 3 ---
 arch/x86/kvm/vmx/vmx.c | 3 ---
 arch/x86/kvm/x86.c     | 3 +++
 3 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 6b680b249975..0d8935e7a943 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2714,9 +2714,6 @@ static int svm_get_msr_feature(struct kvm_msr_entry *msr)
 		if (boot_cpu_has(X86_FEATURE_LFENCE_RDTSC))
 			msr->data |= MSR_F10H_DECFG_LFENCE_SERIALIZE;
 		break;
-	case MSR_IA32_PERF_CAPABILITIES:
-		msr->data = kvm_caps.supported_perf_cap;
-		return 0;
 	default:
 		return KVM_MSR_RET_INVALID;
 	}
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 850ff6e683d1..6ff832178e48 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -1849,9 +1849,6 @@ static int vmx_get_msr_feature(struct kvm_msr_entry *msr)
 		if (!nested)
 			return 1;
 		return vmx_get_vmx_msr(&vmcs_config.nested, msr->index, &msr->data);
-	case MSR_IA32_PERF_CAPABILITIES:
-		msr->data = kvm_caps.supported_perf_cap;
-		return 0;
 	default:
 		return KVM_MSR_RET_INVALID;
 	}
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b6a973d53f93..9443ddb358e6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1653,6 +1653,9 @@ static int kvm_get_msr_feature(struct kvm_msr_entry *msr)
 	case MSR_IA32_ARCH_CAPABILITIES:
 		msr->data = kvm_get_arch_capabilities();
 		break;
+	case MSR_IA32_PERF_CAPABILITIES:
+		msr->data = kvm_caps.supported_perf_cap;
+		break;
 	case MSR_IA32_UCODE_REV:
 		rdmsrl_safe(msr->index, &msr->data);
 		break;
-- 
2.38.0.rc1.362.ged0d419d3c-goog