[PATCH v7 13/17] KVM: x86/pmu: Allow Host-Only/Guest-Only bits with nSVM and mediated PMU

[Yosry Ahmed]

From: Jim Mattson <jmattson@xxxxxxxxxx>

Now that KVM correctly handles Host-Only and Guest-Only bits in the
event selector MSRs, allow the guest to set them if the vCPU advertises
SVM and uses the mediated PMU.

Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx>
Signed-off-by: Yosry Ahmed <yosry@xxxxxxxxxx>
---
 arch/x86/kvm/svm/pmu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kvm/svm/pmu.c b/arch/x86/kvm/svm/pmu.c
index b892a25ea4ca9..c18286545a7ac 100644
--- a/arch/x86/kvm/svm/pmu.c
+++ b/arch/x86/kvm/svm/pmu.c
@@ -213,7 +213,11 @@ static void amd_pmu_refresh(struct kvm_vcpu *vcpu)
 	}
 
 	pmu->counter_bitmask[KVM_PMC_GP] = BIT_ULL(48) - 1;
+
 	pmu->reserved_bits = 0xfffffff000280000ull;
+	if (guest_cpu_cap_has(vcpu, X86_FEATURE_SVM) && kvm_vcpu_has_mediated_pmu(vcpu))
+		pmu->reserved_bits &= ~AMD64_EVENTSEL_HOST_GUEST_MASK;
+
 	pmu->raw_event_mask = AMD64_RAW_EVENT_MASK;
 	/* not applicable to AMD; but clean them to prevent any fall out */
 	pmu->counter_bitmask[KVM_PMC_FIXED] = 0;
-- 
2.54.0.794.g4f17f83d09-goog