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-rw-r--r--hw/virtio/virtio.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 939f802110..1edef5945d 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -1116,6 +1116,16 @@ static bool virtio_ringsize_needed(void *opaque)
return false;
}
+static bool virtio_extra_state_needed(void *opaque)
+{
+ VirtIODevice *vdev = opaque;
+ BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
+ VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
+
+ return k->has_extra_state &&
+ k->has_extra_state(qbus->parent);
+}
+
static void put_virtqueue_state(QEMUFile *f, void *pv, size_t size)
{
VirtIODevice *vdev = pv;
@@ -1210,6 +1220,53 @@ static const VMStateDescription vmstate_virtio_ringsize = {
}
};
+static int get_extra_state(QEMUFile *f, void *pv, size_t size)
+{
+ VirtIODevice *vdev = pv;
+ BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
+ VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
+
+ if (!k->load_extra_state) {
+ return -1;
+ } else {
+ return k->load_extra_state(qbus->parent, f);
+ }
+}
+
+static void put_extra_state(QEMUFile *f, void *pv, size_t size)
+{
+ VirtIODevice *vdev = pv;
+ BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
+ VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
+
+ k->save_extra_state(qbus->parent, f);
+}
+
+static const VMStateInfo vmstate_info_extra_state = {
+ .name = "virtqueue_extra_state",
+ .get = get_extra_state,
+ .put = put_extra_state,
+};
+
+static const VMStateDescription vmstate_virtio_extra_state = {
+ .name = "virtio/extra_state",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .needed = &virtio_extra_state_needed,
+ .fields = (VMStateField[]) {
+ {
+ .name = "extra_state",
+ .version_id = 0,
+ .field_exists = NULL,
+ .size = 0,
+ .info = &vmstate_info_extra_state,
+ .flags = VMS_SINGLE,
+ .offset = 0,
+ },
+ VMSTATE_END_OF_LIST()
+ }
+};
+
static const VMStateDescription vmstate_virtio_device_endian = {
.name = "virtio/device_endian",
.version_id = 1,
@@ -1245,6 +1302,7 @@ static const VMStateDescription vmstate_virtio = {
&vmstate_virtio_64bit_features,
&vmstate_virtio_virtqueues,
&vmstate_virtio_ringsize,
+ &vmstate_virtio_extra_state,
NULL
}
};