[RFC v2 2/7] virtio: Add virtio_queue_host_notifier_status

["Eugenio Pérez" <eperezma@redhat.com>]

This allows shadow virtqueue code to assert the queue status before
making changes.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
 include/hw/virtio/virtio.h | 1 +
 hw/virtio/virtio.c         | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index b7ece7a6a8..227cec13a8 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -316,6 +316,7 @@ void virtio_device_release_ioeventfd(VirtIODevice *vdev);
 bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev);
 EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
 void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled);
+bool virtio_queue_host_notifier_status(const VirtQueue *vq);
 void virtio_queue_host_notifier_read(EventNotifier *n);
 void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,
                                                 VirtIOHandleAIOOutput handle_output);
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 1fd1917ca0..53473ae4df 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -3594,6 +3594,11 @@ EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq)
     return &vq->host_notifier;
 }
 
+bool virtio_queue_host_notifier_status(const VirtQueue *vq)
+{
+    return vq->host_notifier_enabled;
+}
+
 void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled)
 {
     vq->host_notifier_enabled = enabled;
-- 
2.27.0