[PATCH v3 2/5] target/arm/kvm: Fix PMU feature bit early

[Akihiko Odaki]

kvm_arm_get_host_cpu_features() used to add the PMU feature
unconditionally, and kvm_arch_init_vcpu() removed it when it is actually
not available. Conditionally add the PMU feature in
kvm_arm_get_host_cpu_features() to save code.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 target/arm/kvm.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index 70f79eda33cd..849e2e21b304 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -280,6 +280,7 @@ static bool 
kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
     if (kvm_arm_pmu_supported()) {
         init.features[0] |= 1 << KVM_ARM_VCPU_PMU_V3;
         pmu_supported = true;
+        features |= 1ULL << ARM_FEATURE_PMU;
     }
 
     if (!kvm_arm_create_scratch_host_vcpu(cpus_to_try, fdarray, &init)) {
@@ -448,7 +449,6 @@ static bool 
kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
     features |= 1ULL << ARM_FEATURE_V8;
     features |= 1ULL << ARM_FEATURE_NEON;
     features |= 1ULL << ARM_FEATURE_AARCH64;
-    features |= 1ULL << ARM_FEATURE_PMU;
     features |= 1ULL << ARM_FEATURE_GENERIC_TIMER;
 
     ahcf->features = features;
@@ -1888,13 +1888,8 @@ int kvm_arch_init_vcpu(CPUState *cs)
     if (!arm_feature(env, ARM_FEATURE_AARCH64)) {
         cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_EL1_32BIT;
     }
-    if (!kvm_check_extension(cs->kvm_state, KVM_CAP_ARM_PMU_V3)) {
-        cpu->has_pmu = false;
-    }
     if (cpu->has_pmu) {
         cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_PMU_V3;
-    } else {
-        env->features &= ~(1ULL << ARM_FEATURE_PMU);
     }
     if (cpu_isar_feature(aa64_sve, cpu)) {
         assert(kvm_arm_sve_supported());

-- 
2.45.2