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[3/8] kvm tools: add status notification hook for virtio

Message ID 1367612957-6719-3-git-send-email-sasha.levin@oracle.com (mailing list archive)
State New, archived
Headers show

Commit Message

Sasha Levin May 3, 2013, 8:29 p.m. UTC 
Some devices want to know their status, use this hook to allow them to
get that notification.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
---
 tools/kvm/include/kvm/virtio.h | 1 +
 tools/kvm/virtio/pci.c         | 2 ++
 2 files changed, 3 insertions(+)
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Patch

diff --git a/tools/kvm/include/kvm/virtio.h b/tools/kvm/include/kvm/virtio.h
index 924279b..269ea4a 100644
--- a/tools/kvm/include/kvm/virtio.h
+++ b/tools/kvm/include/kvm/virtio.h
@@ -80,6 +80,7 @@  struct virtio_ops {
 	void (*notify_vq_eventfd)(struct kvm *kvm, void *dev, u32 vq, u32 efd);
 	int (*signal_vq)(struct kvm *kvm, struct virtio_device *vdev, u32 queueid);
 	int (*signal_config)(struct kvm *kvm, struct virtio_device *vdev);
+	void (*notify_status)(struct kvm *kvm, void *dev, u8 status);
 	int (*init)(struct kvm *kvm, void *dev, struct virtio_device *vdev,
 		    int device_id, int subsys_id, int class);
 	int (*exit)(struct kvm *kvm, struct virtio_device *vdev);
diff --git a/tools/kvm/virtio/pci.c b/tools/kvm/virtio/pci.c
index 227d567..fec8ce0 100644
--- a/tools/kvm/virtio/pci.c
+++ b/tools/kvm/virtio/pci.c
@@ -210,6 +210,8 @@  static bool virtio_pci__io_out(struct ioport *ioport, struct kvm *kvm, u16 port,
 		break;
 	case VIRTIO_PCI_STATUS:
 		vpci->status = ioport__read8(data);
+		if (vdev->ops->notify_status)
+			vdev->ops->notify_status(kvm, vpci->dev, vpci->status);
 		break;
 	default:
 		ret = virtio_pci__specific_io_out(kvm, vdev, port, data, size, offset);