[Qemu-devel] [PATCH v9 09/20] Add new virtio API virtio_queue_get_avail_idx

[Antonios Motakis]

This function allows to get the current available ring index.

Signed-off-by: Antonios Motakis <address@hidden>
Signed-off-by: Nikolay Nikolaev <address@hidden>
---
 hw/virtio/virtio.c         | 5 +++++
 include/hw/virtio/virtio.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index aeabf3a..3c46e86 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -1058,6 +1058,11 @@ hwaddr virtio_queue_get_ring_size(VirtIODevice *vdev, 
int n)
            virtio_queue_get_used_size(vdev, n);
 }
 
+uint16_t virtio_queue_get_avail_idx(VirtIODevice *vdev, int n)
+{
+    return vring_avail_idx(&vdev->vq[n]);
+}
+
 uint16_t virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n)
 {
     return vdev->vq[n].last_avail_idx;
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index 3e54e90..3bb0db2 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -239,6 +239,7 @@ hwaddr virtio_queue_get_desc_size(VirtIODevice *vdev, int 
n);
 hwaddr virtio_queue_get_avail_size(VirtIODevice *vdev, int n);
 hwaddr virtio_queue_get_used_size(VirtIODevice *vdev, int n);
 hwaddr virtio_queue_get_ring_size(VirtIODevice *vdev, int n);
+uint16_t virtio_queue_get_avail_idx(VirtIODevice *vdev, int n);
 uint16_t virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n);
 void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx);
 void virtio_queue_invalidate_signalled_used(VirtIODevice *vdev, int n);
-- 
1.8.3.2