linux-kernel - [RFC PATCH 13/41] KVM: x86/pmu: Add a helper to check if passthrough PMU is enabled

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Date: Fri, 26 Jan 2024 16:54:16 +0800
From: Xiong Zhang <xiong.y.zhang@...ux.intel.com>
To: seanjc@...gle.com,
	pbonzini@...hat.com,
	peterz@...radead.org,
	mizhang@...gle.com,
	kan.liang@...el.com,
	zhenyuw@...ux.intel.com,
	dapeng1.mi@...ux.intel.com,
	jmattson@...gle.com
Cc: kvm@...r.kernel.org,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	zhiyuan.lv@...el.com,
	eranian@...gle.com,
	irogers@...gle.com,
	samantha.alt@...el.com,
	like.xu.linux@...il.com,
	chao.gao@...el.com,
	xiong.y.zhang@...ux.intel.com
Subject: [RFC PATCH 13/41] KVM: x86/pmu: Add a helper to check if passthrough PMU is enabled

From: Mingwei Zhang <mizhang@...gle.com>

Add a helper to check if passthrough PMU is enabled for convenience as it
is vendor neutral.

Signed-off-by: Mingwei Zhang <mizhang@...gle.com>
---
 arch/x86/kvm/pmu.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/kvm/pmu.h b/arch/x86/kvm/pmu.h
index 51011603c799..28beae0f9209 100644
--- a/arch/x86/kvm/pmu.h
+++ b/arch/x86/kvm/pmu.h
@@ -267,6 +267,11 @@ static inline bool pmc_is_globally_enabled(struct kvm_pmc *pmc)
 	return test_bit(pmc->idx, (unsigned long *)&pmu->global_ctrl);
 }
 
+static inline bool is_passthrough_pmu_enabled(struct kvm_vcpu *vcpu)
+{
+	return vcpu_to_pmu(vcpu)->passthrough;
+}
+
 void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu);
 void kvm_pmu_handle_event(struct kvm_vcpu *vcpu);
 int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
-- 
2.34.1