[RFC v3 11/29] vhost: Add vhost_vring_pause operation

[Eugenio Pérez]

With this operation a device can be paused by a backend, allowing the
later to ask status without the risk of the device override it.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
 include/hw/virtio/vhost-backend.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/hw/virtio/vhost-backend.h 
b/include/hw/virtio/vhost-backend.h
index 8a6f8e2a7a..94d3323905 100644
--- a/include/hw/virtio/vhost-backend.h
+++ b/include/hw/virtio/vhost-backend.h
@@ -125,6 +125,8 @@ typedef int (*vhost_get_device_id_op)(struct vhost_dev 
*dev, uint32_t *dev_id);
 
 typedef bool (*vhost_force_iommu_op)(struct vhost_dev *dev);
 
+typedef int (*vhost_vring_pause_op)(struct vhost_dev *dev);
+
 typedef struct VhostOps {
     VhostBackendType backend_type;
     vhost_backend_init vhost_backend_init;
@@ -169,6 +171,7 @@ typedef struct VhostOps {
     vhost_dev_start_op vhost_dev_start;
     vhost_vq_get_addr_op  vhost_vq_get_addr;
     vhost_get_device_id_op vhost_get_device_id;
+    vhost_vring_pause_op vhost_vring_pause;
     vhost_force_iommu_op vhost_force_iommu;
 } VhostOps;
 
-- 
2.27.0