[PATCH v1 1/5] virtio: Introduce notify_queue

["Edgar E. Iglesias" <edgar.iglesias@gmail.com>]

From: "Edgar E. Iglesias" <edgar.iglesias@amd.com>

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
---
 hw/virtio/virtio.c             | 7 +++++++
 include/hw/virtio/virtio-bus.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 153ee0a0cf..8a53fb5f93 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -2700,12 +2700,19 @@ static void virtio_irq(VirtQueue *vq)
 
 void virtio_notify(VirtIODevice *vdev, VirtQueue *vq)
 {
+    BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
+    VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
+
     WITH_RCU_READ_LOCK_GUARD() {
         if (!virtio_should_notify(vdev, vq)) {
             return;
         }
     }
 
+    if (k->notify_queue) {
+        k->notify_queue(qbus->parent, virtio_get_queue_index(vq));
+    }
+
     trace_virtio_notify(vdev, vq);
     virtio_irq(vq);
 }
diff --git a/include/hw/virtio/virtio-bus.h b/include/hw/virtio/virtio-bus.h
index 7ab8c9dab0..043dbeb4cf 100644
--- a/include/hw/virtio/virtio-bus.h
+++ b/include/hw/virtio/virtio-bus.h
@@ -39,6 +39,7 @@ DECLARE_OBJ_CHECKERS(VirtioBusState, VirtioBusClass,
 struct VirtioBusClass {
     /* This is what a VirtioBus must implement */
     BusClass parent;
+    void (*notify_queue)(DeviceState *d, uint16_t index);
     void (*notify)(DeviceState *d, uint16_t vector);
     void (*save_config)(DeviceState *d, QEMUFile *f);
     void (*save_queue)(DeviceState *d, int n, QEMUFile *f);
-- 
2.43.0