+static int
+is_vring_iotlb_invalidate(struct vhost_virtqueue *vq,
+ struct vhost_iotlb_msg *imsg)
+{
+ uint64_t istart, iend, vstart, vend;
+
+ istart = imsg->iova;
+ iend = istart + imsg->size - 1;
+
+ vstart = (uintptr_t)vq->desc;
+ vend = vstart + sizeof(struct vring_desc) * vq->size - 1;
+ if (vstart <= iend && istart <= vend)
+ return 1;
+
+ vstart = (uintptr_t)vq->avail;
+ vend = vstart + sizeof(struct vring_avail);
+ vend += sizeof(uint16_t) * vq->size - 1;
+ if (vstart <= iend && istart <= vend)
+ return 1;
+
+ vstart = (uintptr_t)vq->used;
+ vend = vstart + sizeof(struct vring_used);
+ vend += sizeof(struct vring_used_elem) * vq->size - 1;
+ if (vstart <= iend && istart <= vend)
+ return 1;
+
+ return 0;
+}
+
+static int
+vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+ struct vhost_iotlb_msg *imsg = &msg->payload.iotlb;
+ uint16_t i;
+ uint64_t vva, len;
+
+ switch (imsg->type) {
+ case VHOST_IOTLB_UPDATE:
+ len = imsg->size;
+ vva = qva_to_vva(dev, imsg->uaddr, &len);
+ if (!vva)
+ return VH_RESULT_ERR;
+
+ for (i = 0; i < dev->nr_vring; i++) {
+ struct vhost_virtqueue *vq = dev->virtqueue[i];
+
+ vhost_user_iotlb_cache_insert(vq, imsg->iova, vva,
+ len, imsg->perm);
+
+ if (is_vring_iotlb_update(vq, imsg))
+ *pdev = dev = translate_ring_addresses(dev, i);
+ }
+ break;
+ case VHOST_IOTLB_INVALIDATE:
+ for (i = 0; i < dev->nr_vring; i++) {
+ struct vhost_virtqueue *vq = dev->virtqueue[i];
+
+ vhost_user_iotlb_cache_remove(vq, imsg->iova,
+ imsg->size);
+
+ if (is_vring_iotlb_invalidate(vq, imsg))
+ vring_invalidate(dev, vq);
+ }
+ break;
+ default:
+ RTE_LOG(ERR, VHOST_CONFIG, "Invalid IOTLB message type (%d)\n",
+ imsg->type);
+ return VH_RESULT_ERR;
+ }
+
+ return VH_RESULT_OK;
+}
+
+static int
+vhost_user_set_postcopy_advise(struct virtio_net **pdev,
+ struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+#ifdef RTE_LIBRTE_VHOST_POSTCOPY
+ struct uffdio_api api_struct;
+
+ dev->postcopy_ufd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
+
+ if (dev->postcopy_ufd == -1) {
+ RTE_LOG(ERR, VHOST_CONFIG, "Userfaultfd not available: %s\n",
+ strerror(errno));
+ return VH_RESULT_ERR;
+ }
+ api_struct.api = UFFD_API;
+ api_struct.features = 0;
+ if (ioctl(dev->postcopy_ufd, UFFDIO_API, &api_struct)) {
+ RTE_LOG(ERR, VHOST_CONFIG, "UFFDIO_API ioctl failure: %s\n",
+ strerror(errno));
+ close(dev->postcopy_ufd);
+ dev->postcopy_ufd = -1;
+ return VH_RESULT_ERR;
+ }
+ msg->fds[0] = dev->postcopy_ufd;
+ msg->fd_num = 1;
+
+ return VH_RESULT_REPLY;
+#else
+ dev->postcopy_ufd = -1;
+ msg->fd_num = 0;
+
+ return VH_RESULT_ERR;
+#endif
+}
+
+static int
+vhost_user_set_postcopy_listen(struct virtio_net **pdev,
+ struct VhostUserMsg *msg __rte_unused,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+
+ if (dev->mem && dev->mem->nregions) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Regions already registered at postcopy-listen\n");
+ return VH_RESULT_ERR;
+ }
+ dev->postcopy_listening = 1;
+
+ return VH_RESULT_OK;
+}
+
+static int
+vhost_user_postcopy_end(struct virtio_net **pdev, struct VhostUserMsg *msg,
+ int main_fd __rte_unused)
+{
+ struct virtio_net *dev = *pdev;
+
+ dev->postcopy_listening = 0;
+ if (dev->postcopy_ufd >= 0) {
+ close(dev->postcopy_ufd);
+ dev->postcopy_ufd = -1;
+ }
+
+ msg->payload.u64 = 0;
+ msg->size = sizeof(msg->payload.u64);
+ msg->fd_num = 0;
+
+ return VH_RESULT_REPLY;
+}
+
+typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
+ struct VhostUserMsg *msg,
+ int main_fd);
+static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
+ [VHOST_USER_NONE] = NULL,
+ [VHOST_USER_GET_FEATURES] = vhost_user_get_features,
+ [VHOST_USER_SET_FEATURES] = vhost_user_set_features,
+ [VHOST_USER_SET_OWNER] = vhost_user_set_owner,
+ [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner,
+ [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table,
+ [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base,
+ [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd,
+ [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num,
+ [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr,
+ [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base,
+ [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base,
+ [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick,
+ [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call,
+ [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err,
+ [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features,
+ [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features,
+ [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num,
+ [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable,
+ [VHOST_USER_SEND_RARP] = vhost_user_send_rarp,
+ [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu,
+ [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd,
+ [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
+ [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise,
+ [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen,
+ [VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end,
+};
+
+