From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
---
arch/arm64/kvm/reset.c | 3 +++
include/kvm/arm_pmu.h | 2 ++
virt/kvm/arm/pmu.c | 18 ++++++++++++++++++
3 files changed, 23 insertions(+)
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index 0b43265..ee2c2e9 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c
@@ -107,5 +107,8 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
/* Reset timer */
kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq);
+ /* Reset PMU */
+ kvm_pmu_vcpu_reset(vcpu);
+
return 0;
}
diff --git a/include/kvm/arm_pmu.h b/include/kvm/arm_pmu.h
index 5f1ea2b..d74e183 100644
--- a/include/kvm/arm_pmu.h
+++ b/include/kvm/arm_pmu.h
@@ -37,6 +37,7 @@ struct kvm_pmu {
};
#ifdef CONFIG_KVM_ARM_PMU
+void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu);
void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu);
unsigned long kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
unsigned long select_idx);
@@ -46,6 +47,7 @@ void kvm_pmu_software_increment(struct kvm_vcpu *vcpu, unsigned long val);
void kvm_pmu_set_counter_event_type(struct kvm_vcpu *vcpu, unsigned long data,
unsigned long select_idx);
#else
+void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu) {}
void kvm_pmu_sync_hwstate(struct kvm_vcpu *vcpu) {}
unsigned long kvm_pmu_get_counter_value(struct kvm_vcpu *vcpu,
unsigned long select_idx)
diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c
index 9e75372..8476d5e 100644
--- a/virt/kvm/arm/pmu.c
+++ b/virt/kvm/arm/pmu.c
@@ -91,6 +91,24 @@ static void kvm_pmu_stop_counter(struct kvm_vcpu *vcpu,
}
/**
+ * kvm_pmu_vcpu_reset - reset pmu state for cpu
+ * @vcpu: The vcpu pointer
+ *
+ */
+void kvm_pmu_vcpu_reset(struct kvm_vcpu *vcpu)
+{
+ int i;
+ struct kvm_pmu *pmu = &vcpu->arch.pmu;
+
+ for (i = 0; i < ARMV8_MAX_COUNTERS; i++) {
+ kvm_pmu_stop_counter(vcpu, i);
+ pmu->pmc[i].idx = i;
+ pmu->pmc[i].vcpu = vcpu;
+ }
+ pmu->irq_pending = false;
+}
+
+/**
* kvm_pmu_sync_hwstate - sync pmu state for cpu
* @vcpu: The vcpu pointer
*
--
2.0.4
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