[PATCH v2 20/22] KVM: ARM64: Reset PMU state when resetting vcpu
From: Shannon Zhao <hidden>
Date: 2015-09-11 08:55:13
Also in:
kvm, kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine (kvm), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Paolo Bonzini, Marc Zyngier, Oliver Upton, Linus Torvalds
From: Shannon Zhao <redacted> Signed-off-by: Shannon Zhao <redacted> --- 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