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[3/3] target/arm/kvm: Report PMU unavailability

Message ID 20240629-pmu-v1-3-7269123b88a4@daynix.com (mailing list archive)
State New, archived
Headers show
Series target/arm/kvm: Report PMU unavailability | expand

Commit Message

Akihiko Odaki June 29, 2024, 12:50 p.m. UTC 
target/arm/kvm.c checked PMU availability but claimed PMU is
available even if it is not. In fact, Asahi Linux supports KVM but lacks
PMU support. Only advertise PMU availability only when it is really
available.

Fixes: dc40d45ebd8e ("target/arm/kvm: Move kvm_arm_get_host_cpu_features and unexport")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 target/arm/kvm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index 7cf5cf31dec4..6bb72c09be10 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;