diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 61bc71882f079..0e5584f4acd70 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -734,6 +734,10 @@ void kvm_set_cpu_caps(void) F(NULL_SEL_CLR_BASE) | F(AUTOIBRS) | 0 /* PrefetchCtlMsr */ ); + kvm_cpu_cap_init_kvm_defined(CPUID_8000_0022_EAX, + F(PERFMON_V2) + ); + /* * Synthesize "LFENCE is serializing" into the AMD-defined entry in * KVM's supported CPUID if the feature is reported as supported by the @@ -1128,7 +1132,7 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) entry->edx = 0; break; case 0x80000000: - entry->eax = min(entry->eax, 0x80000021); + entry->eax = min(entry->eax, 0x80000022); /* * Serializing LFENCE is reported in a multitude of ways, and * NullSegClearsBase is not reported in CPUID on Zen2; help @@ -1233,6 +1237,28 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) entry->ebx = entry->ecx = entry->edx = 0; cpuid_entry_override(entry, CPUID_8000_0021_EAX); break; + /* AMD Extended Performance Monitoring and Debug */ + case 0x80000022: { + union cpuid_0x80000022_ebx ebx; + + entry->ecx = entry->edx = 0; + if (!enable_pmu || !kvm_cpu_cap_has(X86_FEATURE_PERFMON_V2)) { + entry->eax = entry->ebx; + break; + } + + cpuid_entry_override(entry, CPUID_8000_0022_EAX); + + if (kvm_cpu_cap_has(X86_FEATURE_PERFMON_V2)) + ebx.split.num_core_pmc = kvm_pmu_cap.num_counters_gp; + else if (kvm_cpu_cap_has(X86_FEATURE_PERFCTR_CORE)) + ebx.split.num_core_pmc = AMD64_NUM_COUNTERS_CORE; + else + ebx.split.num_core_pmc = AMD64_NUM_COUNTERS; + + entry->ebx = ebx.full; + break; + } /*Add support for Centaur's CPUID instruction*/ case 0xC0000000: /*Just support up to 0xC0000004 now*/ diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index d9669e3cc00a7..ff48cdea1fbff 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -5036,6 +5036,10 @@ static __init void svm_set_cpu_caps(void) kvm_pmu_cap.num_counters_gp); else kvm_cpu_cap_check_and_set(X86_FEATURE_PERFCTR_CORE); + + if (kvm_pmu_cap.version != 2 || + !kvm_cpu_cap_has(X86_FEATURE_PERFCTR_CORE)) + kvm_cpu_cap_clear(X86_FEATURE_PERFMON_V2); } /* CPUID 0x8000001F (SME/SEV features) */