[RFC PATCH v5 13/26] Add vhost_svq_get_svq_call_notifier

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

This allows vhost-vdpa device to retrieve device -> svq call eventfd.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
 hw/virtio/vhost-shadow-virtqueue.h |  2 ++
 hw/virtio/vhost-shadow-virtqueue.c | 12 ++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/hw/virtio/vhost-shadow-virtqueue.h b/hw/virtio/vhost-shadow-virtqueue.h
index eb0a54f954..9e089edb17 100644
--- a/hw/virtio/vhost-shadow-virtqueue.h
+++ b/hw/virtio/vhost-shadow-virtqueue.h
@@ -18,6 +18,8 @@ typedef struct VhostShadowVirtqueue VhostShadowVirtqueue;
 void vhost_svq_set_svq_kick_fd(VhostShadowVirtqueue *svq, int svq_kick_fd);
 const EventNotifier *vhost_svq_get_dev_kick_notifier(
                                               const VhostShadowVirtqueue *svq);
+const EventNotifier *vhost_svq_get_svq_call_notifier(
+                                              const VhostShadowVirtqueue *svq);
 void vhost_svq_set_host_mr_notifier(VhostShadowVirtqueue *svq, void *addr);
 
 void vhost_svq_start(struct vhost_dev *dev, unsigned idx,
diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c
index e3dcc039b6..7acac1be87 100644
--- a/hw/virtio/vhost-shadow-virtqueue.c
+++ b/hw/virtio/vhost-shadow-virtqueue.c
@@ -72,6 +72,18 @@ void vhost_svq_set_host_mr_notifier(VhostShadowVirtqueue *svq, void *addr)
     svq->host_notifier_mr = addr;
 }
 
+/*
+ * Obtain the SVQ call notifier, where vhost device notifies SVQ that there
+ * exists pending used buffers.
+ *
+ * @svq Shadow Virtqueue
+ */
+const EventNotifier *vhost_svq_get_svq_call_notifier(
+                                               const VhostShadowVirtqueue *svq)
+{
+    return &svq->hdev_call;
+}
+
 /**
  * Convenience function to set guest to SVQ kick fd
  *
-- 
2.27.0