diff options
| -rw-r--r-- | include/linux/kvm_host.h | 1 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 15 |
2 files changed, 15 insertions, 1 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 8091a4d90ddf..eafabd5c66b2 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -307,6 +307,7 @@ struct kvm_assigned_dev_kernel { int host_busnr; int host_devfn; int host_irq; + bool host_irq_disabled; int guest_irq; struct msi_msg guest_msi; #define KVM_ASSIGNED_DEV_GUEST_INTX (1 << 0) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index eb70ca6c7145..fc6127cbea1f 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -170,6 +170,7 @@ static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work) KVM_ASSIGNED_DEV_GUEST_MSI) { assigned_device_msi_dispatch(assigned_dev); enable_irq(assigned_dev->host_irq); + assigned_dev->host_irq_disabled = false; } mutex_unlock(&assigned_dev->kvm->lock); kvm_put_kvm(assigned_dev->kvm); @@ -181,8 +182,12 @@ static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id) (struct kvm_assigned_dev_kernel *) dev_id; kvm_get_kvm(assigned_dev->kvm); + schedule_work(&assigned_dev->interrupt_work); + disable_irq_nosync(irq); + assigned_dev->host_irq_disabled = true; + return IRQ_HANDLED; } @@ -196,8 +201,16 @@ static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) dev = container_of(kian, struct kvm_assigned_dev_kernel, ack_notifier); + kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0); - enable_irq(dev->host_irq); + + /* The guest irq may be shared so this ack may be + * from another device. + */ + if (dev->host_irq_disabled) { + enable_irq(dev->host_irq); + dev->host_irq_disabled = false; + } } static void kvm_free_assigned_irq(struct kvm *kvm, |