[RFC PATCH v3 27/58] KVM: x86/pmu: Create a function prototype to disable MSR interception

[Mingwei Zhang <mizhang@xxxxxxxxxx>]

Add one extra pmu function prototype in kvm_pmu_ops to disable PMU MSR
interception.

Signed-off-by: Mingwei Zhang <mizhang@xxxxxxxxxx>
Signed-off-by: Dapeng Mi <dapeng1.mi@xxxxxxxxxxxxxxx>
Tested-by: Yongwei Ma <yongwei.ma@xxxxxxxxx>
---
 arch/x86/include/asm/kvm-x86-pmu-ops.h | 1 +
 arch/x86/kvm/cpuid.c                   | 4 ++++
 arch/x86/kvm/pmu.c                     | 5 +++++
 arch/x86/kvm/pmu.h                     | 2 ++
 4 files changed, 12 insertions(+)

diff --git a/arch/x86/include/asm/kvm-x86-pmu-ops.h b/arch/x86/include/asm/kvm-x86-pmu-ops.h
index fd986d5146e4..1b7876dcb3c3 100644
--- a/arch/x86/include/asm/kvm-x86-pmu-ops.h
+++ b/arch/x86/include/asm/kvm-x86-pmu-ops.h
@@ -24,6 +24,7 @@ KVM_X86_PMU_OP(is_rdpmc_passthru_allowed)
 KVM_X86_PMU_OP_OPTIONAL(reset)
 KVM_X86_PMU_OP_OPTIONAL(deliver_pmi)
 KVM_X86_PMU_OP_OPTIONAL(cleanup)
+KVM_X86_PMU_OP_OPTIONAL(passthrough_pmu_msrs)
 
 #undef KVM_X86_PMU_OP
 #undef KVM_X86_PMU_OP_OPTIONAL
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index f2f2be5d1141..3deb79b39847 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -381,6 +381,10 @@ static void kvm_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
 	vcpu->arch.reserved_gpa_bits = kvm_vcpu_reserved_gpa_bits_raw(vcpu);
 
 	kvm_pmu_refresh(vcpu);
+
+	if (is_passthrough_pmu_enabled(vcpu))
+		kvm_pmu_passthrough_pmu_msrs(vcpu);
+
 	vcpu->arch.cr4_guest_rsvd_bits =
 	    __cr4_reserved_bits(guest_cpuid_has, vcpu);
 
diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index 3afefe4cf6e2..bd94f2d67f5c 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -1059,3 +1059,8 @@ int kvm_vm_ioctl_set_pmu_event_filter(struct kvm *kvm, void __user *argp)
 	kfree(filter);
 	return r;
 }
+
+void kvm_pmu_passthrough_pmu_msrs(struct kvm_vcpu *vcpu)
+{
+	static_call_cond(kvm_x86_pmu_passthrough_pmu_msrs)(vcpu);
+}
diff --git a/arch/x86/kvm/pmu.h b/arch/x86/kvm/pmu.h
index e1af6d07b191..63f876557716 100644
--- a/arch/x86/kvm/pmu.h
+++ b/arch/x86/kvm/pmu.h
@@ -41,6 +41,7 @@ struct kvm_pmu_ops {
 	void (*deliver_pmi)(struct kvm_vcpu *vcpu);
 	void (*cleanup)(struct kvm_vcpu *vcpu);
 	bool (*is_rdpmc_passthru_allowed)(struct kvm_vcpu *vcpu);
+	void (*passthrough_pmu_msrs)(struct kvm_vcpu *vcpu);
 
 	const u64 EVENTSEL_EVENT;
 	const int MAX_NR_GP_COUNTERS;
@@ -292,6 +293,7 @@ void kvm_pmu_destroy(struct kvm_vcpu *vcpu);
 int kvm_vm_ioctl_set_pmu_event_filter(struct kvm *kvm, void __user *argp);
 void kvm_pmu_trigger_event(struct kvm_vcpu *vcpu, u64 eventsel);
 bool kvm_pmu_check_rdpmc_passthrough(struct kvm_vcpu *vcpu);
+void kvm_pmu_passthrough_pmu_msrs(struct kvm_vcpu *vcpu);
 
 bool is_vmware_backdoor_pmc(u32 pmc_idx);
 
-- 
2.46.0.rc1.232.g9752f9e123-goog