+ struct vhost_virtqueue *vq = dev->virtqueue[state->index];
+
+ vq->size = state->num;
+
+ if (dev->dequeue_zero_copy) {
+ vq->nr_zmbuf = 0;
+ vq->last_zmbuf_idx = 0;
+ vq->zmbuf_size = vq->size;
+ vq->zmbufs = rte_zmalloc(NULL, vq->zmbuf_size *
+ sizeof(struct zcopy_mbuf), 0);
+ if (vq->zmbufs == NULL) {
+ RTE_LOG(WARNING, VHOST_CONFIG,
+ "failed to allocate mem for zero copy; "
+ "zero copy is force disabled\n");
+ dev->dequeue_zero_copy = 0;
+ }
+ }
+
+ vq->shadow_used_ring = rte_malloc(NULL,
+ vq->size * sizeof(struct vring_used_elem),
+ RTE_CACHE_LINE_SIZE);
+ if (!vq->shadow_used_ring) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "failed to allocate memory for shadow used ring.\n");
+ return -1;
+ }