[PATCH 15/31] vdpa: Add vhost_svq_get_num

[Eugenio Pérez]

This reports the guest's visible SVQ effective length, not the device's
one.

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

diff --git a/hw/virtio/vhost-shadow-virtqueue.h 
b/hw/virtio/vhost-shadow-virtqueue.h
index 3521e8094d..035207a469 100644
--- a/hw/virtio/vhost-shadow-virtqueue.h
+++ b/hw/virtio/vhost-shadow-virtqueue.h
@@ -29,6 +29,7 @@ const EventNotifier *vhost_svq_get_svq_call_notifier(
                                               const VhostShadowVirtqueue *svq);
 void vhost_svq_get_vring_addr(const VhostShadowVirtqueue *svq,
                               struct vhost_vring_addr *addr);
+uint16_t vhost_svq_get_num(const VhostShadowVirtqueue *svq);
 size_t vhost_svq_driver_area_size(const VhostShadowVirtqueue *svq);
 size_t vhost_svq_device_area_size(const VhostShadowVirtqueue *svq);
 
diff --git a/hw/virtio/vhost-shadow-virtqueue.c 
b/hw/virtio/vhost-shadow-virtqueue.c
index 0f2c2403ff..f129ec8395 100644
--- a/hw/virtio/vhost-shadow-virtqueue.c
+++ b/hw/virtio/vhost-shadow-virtqueue.c
@@ -212,6 +212,11 @@ void vhost_svq_get_vring_addr(const VhostShadowVirtqueue 
*svq,
     addr->used_user_addr = (uint64_t)svq->vring.used;
 }
 
+uint16_t vhost_svq_get_num(const VhostShadowVirtqueue *svq)
+{
+    return svq->vring.num;
+}
+
 size_t vhost_svq_driver_area_size(const VhostShadowVirtqueue *svq)
 {
     size_t desc_size = sizeof(vring_desc_t) * svq->vring.num;
-- 
2.27.0