4 * Copyright (c) 2016 IGEL Co., Ltd.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * * Neither the name of IGEL Co.,Ltd. nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 #ifdef RTE_LIBRTE_VHOST_NUMA
41 #include <rte_ethdev.h>
42 #include <rte_malloc.h>
43 #include <rte_memcpy.h>
45 #include <rte_kvargs.h>
46 #include <rte_virtio_net.h>
47 #include <rte_spinlock.h>
49 #include "rte_eth_vhost.h"
51 #define ETH_VHOST_IFACE_ARG "iface"
52 #define ETH_VHOST_QUEUES_ARG "queues"
53 #define ETH_VHOST_CLIENT_ARG "client"
55 static const char *drivername = "VHOST PMD";
57 static const char *valid_arguments[] = {
64 static struct ether_addr base_eth_addr = {
77 rte_atomic32_t allow_queuing;
78 rte_atomic32_t while_queuing;
79 struct pmd_internal *internal;
80 struct rte_mempool *mb_pool;
82 uint16_t virtqueue_id;
96 volatile uint16_t once;
99 struct internal_list {
100 TAILQ_ENTRY(internal_list) next;
101 struct rte_eth_dev *eth_dev;
104 TAILQ_HEAD(internal_list_head, internal_list);
105 static struct internal_list_head internal_list =
106 TAILQ_HEAD_INITIALIZER(internal_list);
108 static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
110 static rte_atomic16_t nb_started_ports;
111 static pthread_t session_th;
113 static struct rte_eth_link pmd_link = {
115 .link_duplex = ETH_LINK_FULL_DUPLEX,
116 .link_status = ETH_LINK_DOWN
119 struct rte_vhost_vring_state {
122 bool cur[RTE_MAX_QUEUES_PER_PORT * 2];
123 bool seen[RTE_MAX_QUEUES_PER_PORT * 2];
125 unsigned int max_vring;
128 static struct rte_vhost_vring_state *vring_states[RTE_MAX_ETHPORTS];
131 eth_vhost_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
133 struct vhost_queue *r = q;
134 uint16_t i, nb_rx = 0;
136 if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
139 rte_atomic32_set(&r->while_queuing, 1);
141 if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
144 /* Dequeue packets from guest TX queue */
145 nb_rx = rte_vhost_dequeue_burst(r->vid,
146 r->virtqueue_id, r->mb_pool, bufs, nb_bufs);
150 for (i = 0; likely(i < nb_rx); i++) {
151 bufs[i]->port = r->port;
152 r->rx_bytes += bufs[i]->pkt_len;
156 rte_atomic32_set(&r->while_queuing, 0);
162 eth_vhost_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
164 struct vhost_queue *r = q;
165 uint16_t i, nb_tx = 0;
167 if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
170 rte_atomic32_set(&r->while_queuing, 1);
172 if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
175 /* Enqueue packets to guest RX queue */
176 nb_tx = rte_vhost_enqueue_burst(r->vid,
177 r->virtqueue_id, bufs, nb_bufs);
180 r->missed_pkts += nb_bufs - nb_tx;
182 for (i = 0; likely(i < nb_tx); i++)
183 r->tx_bytes += bufs[i]->pkt_len;
185 for (i = 0; likely(i < nb_tx); i++)
186 rte_pktmbuf_free(bufs[i]);
188 rte_atomic32_set(&r->while_queuing, 0);
194 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
199 static inline struct internal_list *
200 find_internal_resource(char *ifname)
203 struct internal_list *list;
204 struct pmd_internal *internal;
209 pthread_mutex_lock(&internal_list_lock);
211 TAILQ_FOREACH(list, &internal_list, next) {
212 internal = list->eth_dev->data->dev_private;
213 if (!strcmp(internal->iface_name, ifname)) {
219 pthread_mutex_unlock(&internal_list_lock);
230 struct rte_eth_dev *eth_dev;
231 struct internal_list *list;
232 struct pmd_internal *internal;
233 struct vhost_queue *vq;
235 char ifname[PATH_MAX];
236 #ifdef RTE_LIBRTE_VHOST_NUMA
240 rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
241 list = find_internal_resource(ifname);
243 RTE_LOG(INFO, PMD, "Invalid device name: %s\n", ifname);
247 eth_dev = list->eth_dev;
248 internal = eth_dev->data->dev_private;
250 #ifdef RTE_LIBRTE_VHOST_NUMA
251 newnode = rte_vhost_get_numa_node(vid);
253 eth_dev->data->numa_node = newnode;
256 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
257 vq = eth_dev->data->rx_queues[i];
261 vq->internal = internal;
262 vq->port = eth_dev->data->port_id;
264 for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
265 vq = eth_dev->data->tx_queues[i];
269 vq->internal = internal;
270 vq->port = eth_dev->data->port_id;
273 for (i = 0; i < rte_vhost_get_queue_num(vid) * VIRTIO_QNUM; i++)
274 rte_vhost_enable_guest_notification(vid, i, 0);
276 eth_dev->data->dev_link.link_status = ETH_LINK_UP;
278 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
279 vq = eth_dev->data->rx_queues[i];
282 rte_atomic32_set(&vq->allow_queuing, 1);
284 for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
285 vq = eth_dev->data->tx_queues[i];
288 rte_atomic32_set(&vq->allow_queuing, 1);
291 RTE_LOG(INFO, PMD, "New connection established\n");
293 _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC);
299 destroy_device(int vid)
301 struct rte_eth_dev *eth_dev;
302 struct vhost_queue *vq;
303 struct internal_list *list;
304 char ifname[PATH_MAX];
306 struct rte_vhost_vring_state *state;
308 rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
309 list = find_internal_resource(ifname);
311 RTE_LOG(ERR, PMD, "Invalid interface name: %s\n", ifname);
314 eth_dev = list->eth_dev;
316 /* Wait until rx/tx_pkt_burst stops accessing vhost device */
317 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
318 vq = eth_dev->data->rx_queues[i];
321 rte_atomic32_set(&vq->allow_queuing, 0);
322 while (rte_atomic32_read(&vq->while_queuing))
325 for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
326 vq = eth_dev->data->tx_queues[i];
329 rte_atomic32_set(&vq->allow_queuing, 0);
330 while (rte_atomic32_read(&vq->while_queuing))
334 eth_dev->data->dev_link.link_status = ETH_LINK_DOWN;
336 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
337 vq = eth_dev->data->rx_queues[i];
342 for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
343 vq = eth_dev->data->tx_queues[i];
349 state = vring_states[eth_dev->data->port_id];
350 rte_spinlock_lock(&state->lock);
351 for (i = 0; i <= state->max_vring; i++) {
352 state->cur[i] = false;
353 state->seen[i] = false;
355 state->max_vring = 0;
356 rte_spinlock_unlock(&state->lock);
358 RTE_LOG(INFO, PMD, "Connection closed\n");
360 _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC);
364 vring_state_changed(int vid, uint16_t vring, int enable)
366 struct rte_vhost_vring_state *state;
367 struct rte_eth_dev *eth_dev;
368 struct internal_list *list;
369 char ifname[PATH_MAX];
371 rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
372 list = find_internal_resource(ifname);
374 RTE_LOG(ERR, PMD, "Invalid interface name: %s\n", ifname);
378 eth_dev = list->eth_dev;
380 state = vring_states[eth_dev->data->port_id];
381 rte_spinlock_lock(&state->lock);
382 state->cur[vring] = enable;
383 state->max_vring = RTE_MAX(vring, state->max_vring);
384 rte_spinlock_unlock(&state->lock);
386 RTE_LOG(INFO, PMD, "vring%u is %s\n",
387 vring, enable ? "enabled" : "disabled");
389 _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE);
395 rte_eth_vhost_get_queue_event(uint8_t port_id,
396 struct rte_eth_vhost_queue_event *event)
398 struct rte_vhost_vring_state *state;
402 if (port_id >= RTE_MAX_ETHPORTS) {
403 RTE_LOG(ERR, PMD, "Invalid port id\n");
407 state = vring_states[port_id];
409 RTE_LOG(ERR, PMD, "Unused port\n");
413 rte_spinlock_lock(&state->lock);
414 for (i = 0; i <= state->max_vring; i++) {
415 idx = state->index++ % (state->max_vring + 1);
417 if (state->cur[idx] != state->seen[idx]) {
418 state->seen[idx] = state->cur[idx];
419 event->queue_id = idx / 2;
421 event->enable = state->cur[idx];
422 rte_spinlock_unlock(&state->lock);
426 rte_spinlock_unlock(&state->lock);
432 vhost_driver_session(void *param __rte_unused)
434 static struct virtio_net_device_ops vhost_ops;
436 /* set vhost arguments */
437 vhost_ops.new_device = new_device;
438 vhost_ops.destroy_device = destroy_device;
439 vhost_ops.vring_state_changed = vring_state_changed;
440 if (rte_vhost_driver_callback_register(&vhost_ops) < 0)
441 RTE_LOG(ERR, PMD, "Can't register callbacks\n");
443 /* start event handling */
444 rte_vhost_driver_session_start();
450 vhost_driver_session_start(void)
454 ret = pthread_create(&session_th,
455 NULL, vhost_driver_session, NULL);
457 RTE_LOG(ERR, PMD, "Can't create a thread\n");
463 vhost_driver_session_stop(void)
467 ret = pthread_cancel(session_th);
469 RTE_LOG(ERR, PMD, "Can't cancel the thread\n");
471 ret = pthread_join(session_th, NULL);
473 RTE_LOG(ERR, PMD, "Can't join the thread\n");
477 eth_dev_start(struct rte_eth_dev *dev)
479 struct pmd_internal *internal = dev->data->dev_private;
482 if (rte_atomic16_cmpset(&internal->once, 0, 1)) {
483 ret = rte_vhost_driver_register(internal->iface_name,
489 /* We need only one message handling thread */
490 if (rte_atomic16_add_return(&nb_started_ports, 1) == 1)
491 ret = vhost_driver_session_start();
497 eth_dev_stop(struct rte_eth_dev *dev)
499 struct pmd_internal *internal = dev->data->dev_private;
501 if (rte_atomic16_cmpset(&internal->once, 1, 0))
502 rte_vhost_driver_unregister(internal->iface_name);
504 if (rte_atomic16_sub_return(&nb_started_ports, 1) == 0)
505 vhost_driver_session_stop();
509 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
510 uint16_t nb_rx_desc __rte_unused,
511 unsigned int socket_id,
512 const struct rte_eth_rxconf *rx_conf __rte_unused,
513 struct rte_mempool *mb_pool)
515 struct vhost_queue *vq;
517 vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
518 RTE_CACHE_LINE_SIZE, socket_id);
520 RTE_LOG(ERR, PMD, "Failed to allocate memory for rx queue\n");
524 vq->mb_pool = mb_pool;
525 vq->virtqueue_id = rx_queue_id * VIRTIO_QNUM + VIRTIO_TXQ;
526 dev->data->rx_queues[rx_queue_id] = vq;
532 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
533 uint16_t nb_tx_desc __rte_unused,
534 unsigned int socket_id,
535 const struct rte_eth_txconf *tx_conf __rte_unused)
537 struct vhost_queue *vq;
539 vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
540 RTE_CACHE_LINE_SIZE, socket_id);
542 RTE_LOG(ERR, PMD, "Failed to allocate memory for tx queue\n");
546 vq->virtqueue_id = tx_queue_id * VIRTIO_QNUM + VIRTIO_RXQ;
547 dev->data->tx_queues[tx_queue_id] = vq;
553 eth_dev_info(struct rte_eth_dev *dev,
554 struct rte_eth_dev_info *dev_info)
556 struct pmd_internal *internal;
558 internal = dev->data->dev_private;
559 if (internal == NULL) {
560 RTE_LOG(ERR, PMD, "Invalid device specified\n");
564 dev_info->driver_name = drivername;
565 dev_info->max_mac_addrs = 1;
566 dev_info->max_rx_pktlen = (uint32_t)-1;
567 dev_info->max_rx_queues = internal->max_queues;
568 dev_info->max_tx_queues = internal->max_queues;
569 dev_info->min_rx_bufsize = 0;
573 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
576 unsigned long rx_total = 0, tx_total = 0, tx_missed_total = 0;
577 unsigned long rx_total_bytes = 0, tx_total_bytes = 0;
578 struct vhost_queue *vq;
580 for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
581 i < dev->data->nb_rx_queues; i++) {
582 if (dev->data->rx_queues[i] == NULL)
584 vq = dev->data->rx_queues[i];
585 stats->q_ipackets[i] = vq->rx_pkts;
586 rx_total += stats->q_ipackets[i];
588 stats->q_ibytes[i] = vq->rx_bytes;
589 rx_total_bytes += stats->q_ibytes[i];
592 for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
593 i < dev->data->nb_tx_queues; i++) {
594 if (dev->data->tx_queues[i] == NULL)
596 vq = dev->data->tx_queues[i];
597 stats->q_opackets[i] = vq->tx_pkts;
598 tx_missed_total += vq->missed_pkts;
599 tx_total += stats->q_opackets[i];
601 stats->q_obytes[i] = vq->tx_bytes;
602 tx_total_bytes += stats->q_obytes[i];
605 stats->ipackets = rx_total;
606 stats->opackets = tx_total;
607 stats->oerrors = tx_missed_total;
608 stats->ibytes = rx_total_bytes;
609 stats->obytes = tx_total_bytes;
613 eth_stats_reset(struct rte_eth_dev *dev)
615 struct vhost_queue *vq;
618 for (i = 0; i < dev->data->nb_rx_queues; i++) {
619 if (dev->data->rx_queues[i] == NULL)
621 vq = dev->data->rx_queues[i];
625 for (i = 0; i < dev->data->nb_tx_queues; i++) {
626 if (dev->data->tx_queues[i] == NULL)
628 vq = dev->data->tx_queues[i];
636 eth_queue_release(void *q)
642 eth_link_update(struct rte_eth_dev *dev __rte_unused,
643 int wait_to_complete __rte_unused)
649 * Disable features in feature_mask. Returns 0 on success.
652 rte_eth_vhost_feature_disable(uint64_t feature_mask)
654 return rte_vhost_feature_disable(feature_mask);
658 * Enable features in feature_mask. Returns 0 on success.
661 rte_eth_vhost_feature_enable(uint64_t feature_mask)
663 return rte_vhost_feature_enable(feature_mask);
666 /* Returns currently supported vhost features */
668 rte_eth_vhost_feature_get(void)
670 return rte_vhost_feature_get();
673 static const struct eth_dev_ops ops = {
674 .dev_start = eth_dev_start,
675 .dev_stop = eth_dev_stop,
676 .dev_configure = eth_dev_configure,
677 .dev_infos_get = eth_dev_info,
678 .rx_queue_setup = eth_rx_queue_setup,
679 .tx_queue_setup = eth_tx_queue_setup,
680 .rx_queue_release = eth_queue_release,
681 .tx_queue_release = eth_queue_release,
682 .link_update = eth_link_update,
683 .stats_get = eth_stats_get,
684 .stats_reset = eth_stats_reset,
688 eth_dev_vhost_create(const char *name, char *iface_name, int16_t queues,
689 const unsigned numa_node, uint64_t flags)
691 struct rte_eth_dev_data *data = NULL;
692 struct pmd_internal *internal = NULL;
693 struct rte_eth_dev *eth_dev = NULL;
694 struct ether_addr *eth_addr = NULL;
695 struct rte_vhost_vring_state *vring_state = NULL;
696 struct internal_list *list = NULL;
698 RTE_LOG(INFO, PMD, "Creating VHOST-USER backend on numa socket %u\n",
701 /* now do all data allocation - for eth_dev structure, dummy pci driver
702 * and internal (private) data
704 data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
708 internal = rte_zmalloc_socket(name, sizeof(*internal), 0, numa_node);
709 if (internal == NULL)
712 list = rte_zmalloc_socket(name, sizeof(*list), 0, numa_node);
716 /* reserve an ethdev entry */
717 eth_dev = rte_eth_dev_allocate(name);
721 eth_addr = rte_zmalloc_socket(name, sizeof(*eth_addr), 0, numa_node);
722 if (eth_addr == NULL)
724 *eth_addr = base_eth_addr;
725 eth_addr->addr_bytes[5] = eth_dev->data->port_id;
727 vring_state = rte_zmalloc_socket(name,
728 sizeof(*vring_state), 0, numa_node);
729 if (vring_state == NULL)
732 TAILQ_INIT(ð_dev->link_intr_cbs);
734 /* now put it all together
735 * - store queue data in internal,
736 * - store numa_node info in ethdev data
737 * - point eth_dev_data to internals
738 * - and point eth_dev structure to new eth_dev_data structure
740 internal->dev_name = strdup(name);
741 if (internal->dev_name == NULL)
743 internal->iface_name = strdup(iface_name);
744 if (internal->iface_name == NULL)
746 internal->flags = flags;
748 list->eth_dev = eth_dev;
749 pthread_mutex_lock(&internal_list_lock);
750 TAILQ_INSERT_TAIL(&internal_list, list, next);
751 pthread_mutex_unlock(&internal_list_lock);
753 rte_spinlock_init(&vring_state->lock);
754 vring_states[eth_dev->data->port_id] = vring_state;
756 data->dev_private = internal;
757 data->port_id = eth_dev->data->port_id;
758 memmove(data->name, eth_dev->data->name, sizeof(data->name));
759 data->nb_rx_queues = queues;
760 data->nb_tx_queues = queues;
761 internal->max_queues = queues;
762 data->dev_link = pmd_link;
763 data->mac_addrs = eth_addr;
765 /* We'll replace the 'data' originally allocated by eth_dev. So the
766 * vhost PMD resources won't be shared between multi processes.
768 eth_dev->data = data;
769 eth_dev->dev_ops = &ops;
770 eth_dev->driver = NULL;
772 RTE_ETH_DEV_DETACHABLE | RTE_ETH_DEV_INTR_LSC;
773 data->kdrv = RTE_KDRV_NONE;
774 data->drv_name = internal->dev_name;
775 data->numa_node = numa_node;
777 /* finally assign rx and tx ops */
778 eth_dev->rx_pkt_burst = eth_vhost_rx;
779 eth_dev->tx_pkt_burst = eth_vhost_tx;
781 return data->port_id;
785 free(internal->dev_name);
786 rte_free(vring_state);
789 rte_eth_dev_release_port(eth_dev);
798 open_iface(const char *key __rte_unused, const char *value, void *extra_args)
800 const char **iface_name = extra_args;
811 open_int(const char *key __rte_unused, const char *value, void *extra_args)
813 uint16_t *n = extra_args;
815 if (value == NULL || extra_args == NULL)
818 *n = (uint16_t)strtoul(value, NULL, 0);
819 if (*n == USHRT_MAX && errno == ERANGE)
826 rte_pmd_vhost_devinit(const char *name, const char *params)
828 struct rte_kvargs *kvlist = NULL;
835 RTE_LOG(INFO, PMD, "Initializing pmd_vhost for %s\n", name);
837 kvlist = rte_kvargs_parse(params, valid_arguments);
841 if (rte_kvargs_count(kvlist, ETH_VHOST_IFACE_ARG) == 1) {
842 ret = rte_kvargs_process(kvlist, ETH_VHOST_IFACE_ARG,
843 &open_iface, &iface_name);
851 if (rte_kvargs_count(kvlist, ETH_VHOST_QUEUES_ARG) == 1) {
852 ret = rte_kvargs_process(kvlist, ETH_VHOST_QUEUES_ARG,
854 if (ret < 0 || queues > RTE_MAX_QUEUES_PER_PORT)
860 if (rte_kvargs_count(kvlist, ETH_VHOST_CLIENT_ARG) == 1) {
861 ret = rte_kvargs_process(kvlist, ETH_VHOST_CLIENT_ARG,
862 &open_int, &client_mode);
867 flags |= RTE_VHOST_USER_CLIENT;
870 eth_dev_vhost_create(name, iface_name, queues, rte_socket_id(), flags);
873 rte_kvargs_free(kvlist);
878 rte_pmd_vhost_devuninit(const char *name)
880 struct rte_eth_dev *eth_dev = NULL;
881 struct pmd_internal *internal;
882 struct internal_list *list;
885 RTE_LOG(INFO, PMD, "Un-Initializing pmd_vhost for %s\n", name);
887 /* find an ethdev entry */
888 eth_dev = rte_eth_dev_allocated(name);
892 internal = eth_dev->data->dev_private;
893 if (internal == NULL)
896 list = find_internal_resource(internal->iface_name);
900 pthread_mutex_lock(&internal_list_lock);
901 TAILQ_REMOVE(&internal_list, list, next);
902 pthread_mutex_unlock(&internal_list_lock);
905 eth_dev_stop(eth_dev);
907 rte_free(vring_states[eth_dev->data->port_id]);
908 vring_states[eth_dev->data->port_id] = NULL;
910 free(internal->dev_name);
911 free(internal->iface_name);
913 for (i = 0; i < eth_dev->data->nb_rx_queues; i++)
914 rte_free(eth_dev->data->rx_queues[i]);
915 for (i = 0; i < eth_dev->data->nb_tx_queues; i++)
916 rte_free(eth_dev->data->tx_queues[i]);
918 rte_free(eth_dev->data->mac_addrs);
919 rte_free(eth_dev->data);
922 rte_eth_dev_release_port(eth_dev);
927 static struct rte_vdev_driver pmd_vhost_drv = {
931 .init = rte_pmd_vhost_devinit,
932 .uninit = rte_pmd_vhost_devuninit,
935 DRIVER_REGISTER_VDEV(net_vhost, pmd_vhost_drv);
936 DRIVER_REGISTER_PARAM_STRING(net_vhost,