diff options
Diffstat (limited to 'virt/kvm/arm/pmu.c')
| -rw-r--r-- | virt/kvm/arm/pmu.c | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c index 69ccce308458..4b43e7f3b158 100644 --- a/virt/kvm/arm/pmu.c +++ b/virt/kvm/arm/pmu.c @@ -230,13 +230,44 @@ static void kvm_pmu_update_state(struct kvm_vcpu *vcpu) return; overflow = !!kvm_pmu_overflow_status(vcpu); - if (pmu->irq_level != overflow) { - pmu->irq_level = overflow; - kvm_vgic_inject_irq(vcpu->kvm, vcpu->vcpu_id, - pmu->irq_num, overflow); + if (pmu->irq_level == overflow) + return; + + pmu->irq_level = overflow; + + if (likely(irqchip_in_kernel(vcpu->kvm))) { + int ret; + ret = kvm_vgic_inject_irq(vcpu->kvm, vcpu->vcpu_id, + pmu->irq_num, overflow); + WARN_ON(ret); } } +bool kvm_pmu_should_notify_user(struct kvm_vcpu *vcpu) +{ + struct kvm_pmu *pmu = &vcpu->arch.pmu; + struct kvm_sync_regs *sregs = &vcpu->run->s.regs; + bool run_level = sregs->device_irq_level & KVM_ARM_DEV_PMU; + + if (likely(irqchip_in_kernel(vcpu->kvm))) + return false; + + return pmu->irq_level != run_level; +} + +/* + * Reflect the PMU overflow interrupt output level into the kvm_run structure + */ +void kvm_pmu_update_run(struct kvm_vcpu *vcpu) +{ + struct kvm_sync_regs *regs = &vcpu->run->s.regs; + + /* Populate the timer bitmap for user space */ + regs->device_irq_level &= ~KVM_ARM_DEV_PMU; + if (vcpu->arch.pmu.irq_level) + regs->device_irq_level |= KVM_ARM_DEV_PMU; +} + /** * kvm_pmu_flush_hwstate - flush pmu state to cpu * @vcpu: The vcpu pointer |