This way QMP command can iterate through them and find the devices it
needs to enable shadow virtqueue in.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
 include/hw/virtio/vhost-vdpa.h | 2 ++
 hw/virtio/vhost-vdpa.c         | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h
index 9188226d8b..0d565bb5bd 100644
--- a/include/hw/virtio/vhost-vdpa.h
+++ b/include/hw/virtio/vhost-vdpa.h
@@ -12,6 +12,7 @@
 #ifndef HW_VIRTIO_VHOST_VDPA_H
 #define HW_VIRTIO_VHOST_VDPA_H
 
+#include "qemu/queue.h"
 #include "hw/virtio/virtio.h"
 
 typedef struct VhostVDPAHostNotifier {
@@ -24,6 +25,7 @@ typedef struct vhost_vdpa {
     uint32_t msg_type;
     MemoryListener listener;
     struct vhost_dev *dev;
+    QLIST_ENTRY(vhost_vdpa) entry;
     VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX];
 } VhostVDPA;
 
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index c63e311d7c..e0dc7508c3 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -26,6 +26,9 @@
 #include "qapi/qapi-commands-net.h"
 #include "qapi/error.h"
 
+static QLIST_HEAD(, vhost_vdpa) vhost_vdpa_devices =
+    QLIST_HEAD_INITIALIZER(vhost_vdpa_devices);
+
 static bool vhost_vdpa_listener_skipped_section(MemoryRegionSection *section)
 {
     return (!memory_region_is_ram(section->mr) &&
@@ -280,6 +283,7 @@ static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp)
     dev->opaque =  opaque ;
     v->listener = vhost_vdpa_memory_listener;
     v->msg_type = VHOST_IOTLB_MSG_V2;
+    QLIST_INSERT_HEAD(&vhost_vdpa_devices, v, entry);
 
     vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE |
                                VIRTIO_CONFIG_S_DRIVER);
@@ -377,6 +381,7 @@ static int vhost_vdpa_cleanup(struct vhost_dev *dev)
     trace_vhost_vdpa_cleanup(dev, v);
     vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs);
     memory_listener_unregister(&v->listener);
+    QLIST_REMOVE(v, entry);
 
     dev->opaque = NULL;
     return 0;
-- 
2.27.0