From: Sandipan Das <sandipan.das@xxxxxxx>
Pass on the passthrough PMU setting from kvm->arch into kvm_pmu for each
vcpu. As long as the host supports PerfMonV2, the guest PMU version does
not matter.
Note that guest vCPUs without a local APIC do not allocate an instance of
struct kvm_lapic because of which reading the guest LVTPC before switching
over to the PMI vector results in a NULL pointer dereference. Such vCPUs
also cannot receive PMIs. Hence, disable passthrough mode in such cases.
Signed-off-by: Sandipan Das <sandipan.das@xxxxxxx>
Signed-off-by: Mingwei Zhang <mizhang@xxxxxxxxxx>
---
arch/x86/kvm/svm/pmu.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/kvm/svm/pmu.c b/arch/x86/kvm/svm/pmu.c
index 64060cbd8210..0a16f0eb2511 100644
--- a/arch/x86/kvm/svm/pmu.c
+++ b/arch/x86/kvm/svm/pmu.c
@@ -211,6 +211,8 @@ static void amd_pmu_refresh(struct kvm_vcpu *vcpu)
pmu->counter_bitmask[KVM_PMC_FIXED] = 0;
pmu->nr_arch_fixed_counters = 0;
bitmap_set(pmu->all_valid_pmc_idx, 0, pmu->nr_arch_gp_counters);
+ pmu->passthrough = vcpu->kvm->arch.enable_passthrough_pmu &&
+ lapic_in_kernel(vcpu);
if (pmu->version > 1 || guest_cpuid_has(vcpu, X86_FEATURE_PERFCTR_CORE)) {
for (i = 0; i < pmu->nr_arch_gp_counters; i++) {
--
2.46.0.rc1.232.g9752f9e123-goog
