11e0a84eaSCindy Lu /* 21e0a84eaSCindy Lu * vhost-vdpa.c 31e0a84eaSCindy Lu * 41e0a84eaSCindy Lu * Copyright(c) 2017-2018 Intel Corporation. 51e0a84eaSCindy Lu * Copyright(c) 2020 Red Hat, Inc. 61e0a84eaSCindy Lu * 71e0a84eaSCindy Lu * This work is licensed under the terms of the GNU GPL, version 2 or later. 81e0a84eaSCindy Lu * See the COPYING file in the top-level directory. 91e0a84eaSCindy Lu * 101e0a84eaSCindy Lu */ 111e0a84eaSCindy Lu 121e0a84eaSCindy Lu #include "qemu/osdep.h" 131e0a84eaSCindy Lu #include "clients.h" 14bd907ae4SEugenio Pérez #include "hw/virtio/virtio-net.h" 151e0a84eaSCindy Lu #include "net/vhost_net.h" 161e0a84eaSCindy Lu #include "net/vhost-vdpa.h" 171e0a84eaSCindy Lu #include "hw/virtio/vhost-vdpa.h" 181e0a84eaSCindy Lu #include "qemu/config-file.h" 191e0a84eaSCindy Lu #include "qemu/error-report.h" 20bd907ae4SEugenio Pérez #include "qemu/log.h" 21bd907ae4SEugenio Pérez #include "qemu/memalign.h" 221e0a84eaSCindy Lu #include "qemu/option.h" 231e0a84eaSCindy Lu #include "qapi/error.h" 2440237840SJason Wang #include <linux/vhost.h> 251e0a84eaSCindy Lu #include <sys/ioctl.h> 261e0a84eaSCindy Lu #include <err.h> 271e0a84eaSCindy Lu #include "standard-headers/linux/virtio_net.h" 281e0a84eaSCindy Lu #include "monitor/monitor.h" 2969498430SEugenio Pérez #include "migration/migration.h" 3069498430SEugenio Pérez #include "migration/misc.h" 311e0a84eaSCindy Lu #include "hw/virtio/vhost.h" 321e0a84eaSCindy Lu 331e0a84eaSCindy Lu /* Todo:need to add the multiqueue support here */ 341e0a84eaSCindy Lu typedef struct VhostVDPAState { 351e0a84eaSCindy Lu NetClientState nc; 361e0a84eaSCindy Lu struct vhost_vdpa vhost_vdpa; 3769498430SEugenio Pérez Notifier migration_state; 381e0a84eaSCindy Lu VHostNetState *vhost_net; 392df4dd31SEugenio Pérez 402df4dd31SEugenio Pérez /* Control commands shadow buffers */ 4117fb889fSEugenio Pérez void *cvq_cmd_out_buffer; 4217fb889fSEugenio Pérez virtio_net_ctrl_ack *status; 4317fb889fSEugenio Pérez 447f211a28SEugenio Pérez /* The device always have SVQ enabled */ 457f211a28SEugenio Pérez bool always_svq; 46*152128d6SEugenio Pérez 47*152128d6SEugenio Pérez /* The device can isolate CVQ in its own ASID */ 48*152128d6SEugenio Pérez bool cvq_isolated; 49*152128d6SEugenio Pérez 501e0a84eaSCindy Lu bool started; 511e0a84eaSCindy Lu } VhostVDPAState; 521e0a84eaSCindy Lu 531e0a84eaSCindy Lu const int vdpa_feature_bits[] = { 541e0a84eaSCindy Lu VIRTIO_F_NOTIFY_ON_EMPTY, 551e0a84eaSCindy Lu VIRTIO_RING_F_INDIRECT_DESC, 561e0a84eaSCindy Lu VIRTIO_RING_F_EVENT_IDX, 571e0a84eaSCindy Lu VIRTIO_F_ANY_LAYOUT, 581e0a84eaSCindy Lu VIRTIO_F_VERSION_1, 591e0a84eaSCindy Lu VIRTIO_NET_F_CSUM, 601e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_CSUM, 611e0a84eaSCindy Lu VIRTIO_NET_F_GSO, 621e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_TSO4, 631e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_TSO6, 641e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_ECN, 651e0a84eaSCindy Lu VIRTIO_NET_F_GUEST_UFO, 661e0a84eaSCindy Lu VIRTIO_NET_F_HOST_TSO4, 671e0a84eaSCindy Lu VIRTIO_NET_F_HOST_TSO6, 681e0a84eaSCindy Lu VIRTIO_NET_F_HOST_ECN, 691e0a84eaSCindy Lu VIRTIO_NET_F_HOST_UFO, 701e0a84eaSCindy Lu VIRTIO_NET_F_MRG_RXBUF, 711e0a84eaSCindy Lu VIRTIO_NET_F_MTU, 7240237840SJason Wang VIRTIO_NET_F_CTRL_RX, 7340237840SJason Wang VIRTIO_NET_F_CTRL_RX_EXTRA, 7440237840SJason Wang VIRTIO_NET_F_CTRL_VLAN, 7540237840SJason Wang VIRTIO_NET_F_CTRL_MAC_ADDR, 7640237840SJason Wang VIRTIO_NET_F_RSS, 7740237840SJason Wang VIRTIO_NET_F_MQ, 7840237840SJason Wang VIRTIO_NET_F_CTRL_VQ, 791e0a84eaSCindy Lu VIRTIO_F_IOMMU_PLATFORM, 801e0a84eaSCindy Lu VIRTIO_F_RING_PACKED, 81562a7d23SStefano Garzarella VIRTIO_F_RING_RESET, 820145c393SAndrew Melnychenko VIRTIO_NET_F_RSS, 830145c393SAndrew Melnychenko VIRTIO_NET_F_HASH_REPORT, 849aa47eddSSi-Wei Liu VIRTIO_NET_F_STATUS, 851e0a84eaSCindy Lu VHOST_INVALID_FEATURE_BIT 861e0a84eaSCindy Lu }; 871e0a84eaSCindy Lu 881576dbb5SEugenio Pérez /** Supported device specific feature bits with SVQ */ 891576dbb5SEugenio Pérez static const uint64_t vdpa_svq_device_features = 901576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_CSUM) | 911576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) | 921576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MTU) | 931576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MAC) | 941576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) | 951576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) | 961576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_ECN) | 971576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_GUEST_UFO) | 981576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_TSO4) | 991576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_TSO6) | 1001576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_ECN) | 1011576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_HOST_UFO) | 1021576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) | 1031576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_STATUS) | 1041576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_CTRL_VQ) | 10572b99a87SEugenio Pérez BIT_ULL(VIRTIO_NET_F_MQ) | 1061576dbb5SEugenio Pérez BIT_ULL(VIRTIO_F_ANY_LAYOUT) | 1071576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) | 108609ab4c3SEugenio Pérez /* VHOST_F_LOG_ALL is exposed by SVQ */ 109609ab4c3SEugenio Pérez BIT_ULL(VHOST_F_LOG_ALL) | 1101576dbb5SEugenio Pérez BIT_ULL(VIRTIO_NET_F_RSC_EXT) | 1110d74e2b7SEugenio Pérez BIT_ULL(VIRTIO_NET_F_STANDBY) | 1120d74e2b7SEugenio Pérez BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX); 1131576dbb5SEugenio Pérez 114c1a10086SEugenio Pérez #define VHOST_VDPA_NET_CVQ_ASID 1 115c1a10086SEugenio Pérez 1161e0a84eaSCindy Lu VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc) 1171e0a84eaSCindy Lu { 1181e0a84eaSCindy Lu VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 1191e0a84eaSCindy Lu assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 1201e0a84eaSCindy Lu return s->vhost_net; 1211e0a84eaSCindy Lu } 1221e0a84eaSCindy Lu 12336e46472SEugenio Pérez static bool vhost_vdpa_net_valid_svq_features(uint64_t features, Error **errp) 12436e46472SEugenio Pérez { 12536e46472SEugenio Pérez uint64_t invalid_dev_features = 12636e46472SEugenio Pérez features & ~vdpa_svq_device_features & 12736e46472SEugenio Pérez /* Transport are all accepted at this point */ 12836e46472SEugenio Pérez ~MAKE_64BIT_MASK(VIRTIO_TRANSPORT_F_START, 12936e46472SEugenio Pérez VIRTIO_TRANSPORT_F_END - VIRTIO_TRANSPORT_F_START); 13036e46472SEugenio Pérez 13136e46472SEugenio Pérez if (invalid_dev_features) { 13236e46472SEugenio Pérez error_setg(errp, "vdpa svq does not work with features 0x%" PRIx64, 13336e46472SEugenio Pérez invalid_dev_features); 134258a0394SEugenio Pérez return false; 13536e46472SEugenio Pérez } 13636e46472SEugenio Pérez 137258a0394SEugenio Pérez return vhost_svq_valid_features(features, errp); 13836e46472SEugenio Pérez } 13936e46472SEugenio Pérez 1401e0a84eaSCindy Lu static int vhost_vdpa_net_check_device_id(struct vhost_net *net) 1411e0a84eaSCindy Lu { 1421e0a84eaSCindy Lu uint32_t device_id; 1431e0a84eaSCindy Lu int ret; 1441e0a84eaSCindy Lu struct vhost_dev *hdev; 1451e0a84eaSCindy Lu 1461e0a84eaSCindy Lu hdev = (struct vhost_dev *)&net->dev; 1471e0a84eaSCindy Lu ret = hdev->vhost_ops->vhost_get_device_id(hdev, &device_id); 1481e0a84eaSCindy Lu if (device_id != VIRTIO_ID_NET) { 1491e0a84eaSCindy Lu return -ENOTSUP; 1501e0a84eaSCindy Lu } 1511e0a84eaSCindy Lu return ret; 1521e0a84eaSCindy Lu } 1531e0a84eaSCindy Lu 15440237840SJason Wang static int vhost_vdpa_add(NetClientState *ncs, void *be, 15540237840SJason Wang int queue_pair_index, int nvqs) 1561e0a84eaSCindy Lu { 1571e0a84eaSCindy Lu VhostNetOptions options; 1581e0a84eaSCindy Lu struct vhost_net *net = NULL; 1591e0a84eaSCindy Lu VhostVDPAState *s; 1601e0a84eaSCindy Lu int ret; 1611e0a84eaSCindy Lu 1621e0a84eaSCindy Lu options.backend_type = VHOST_BACKEND_TYPE_VDPA; 1631e0a84eaSCindy Lu assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 1641e0a84eaSCindy Lu s = DO_UPCAST(VhostVDPAState, nc, ncs); 1651e0a84eaSCindy Lu options.net_backend = ncs; 1661e0a84eaSCindy Lu options.opaque = be; 1671e0a84eaSCindy Lu options.busyloop_timeout = 0; 16840237840SJason Wang options.nvqs = nvqs; 1691e0a84eaSCindy Lu 1701e0a84eaSCindy Lu net = vhost_net_init(&options); 1711e0a84eaSCindy Lu if (!net) { 1721e0a84eaSCindy Lu error_report("failed to init vhost_net for queue"); 173a97ef87aSJason Wang goto err_init; 1741e0a84eaSCindy Lu } 1751e0a84eaSCindy Lu s->vhost_net = net; 1761e0a84eaSCindy Lu ret = vhost_vdpa_net_check_device_id(net); 1771e0a84eaSCindy Lu if (ret) { 178a97ef87aSJason Wang goto err_check; 1791e0a84eaSCindy Lu } 1801e0a84eaSCindy Lu return 0; 181a97ef87aSJason Wang err_check: 1821e0a84eaSCindy Lu vhost_net_cleanup(net); 183ab36edcfSJason Wang g_free(net); 184a97ef87aSJason Wang err_init: 1851e0a84eaSCindy Lu return -1; 1861e0a84eaSCindy Lu } 1871e0a84eaSCindy Lu 1881e0a84eaSCindy Lu static void vhost_vdpa_cleanup(NetClientState *nc) 1891e0a84eaSCindy Lu { 1901e0a84eaSCindy Lu VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 1911e0a84eaSCindy Lu 1922df4dd31SEugenio Pérez qemu_vfree(s->cvq_cmd_out_buffer); 19317fb889fSEugenio Pérez qemu_vfree(s->status); 1941e0a84eaSCindy Lu if (s->vhost_net) { 1951e0a84eaSCindy Lu vhost_net_cleanup(s->vhost_net); 1961e0a84eaSCindy Lu g_free(s->vhost_net); 1971e0a84eaSCindy Lu s->vhost_net = NULL; 1981e0a84eaSCindy Lu } 19957b3a7d8SCindy Lu if (s->vhost_vdpa.device_fd >= 0) { 20057b3a7d8SCindy Lu qemu_close(s->vhost_vdpa.device_fd); 20157b3a7d8SCindy Lu s->vhost_vdpa.device_fd = -1; 20257b3a7d8SCindy Lu } 2031e0a84eaSCindy Lu } 2041e0a84eaSCindy Lu 2051e0a84eaSCindy Lu static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc) 2061e0a84eaSCindy Lu { 2071e0a84eaSCindy Lu assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 2081e0a84eaSCindy Lu 2091e0a84eaSCindy Lu return true; 2101e0a84eaSCindy Lu } 2111e0a84eaSCindy Lu 2121e0a84eaSCindy Lu static bool vhost_vdpa_has_ufo(NetClientState *nc) 2131e0a84eaSCindy Lu { 2141e0a84eaSCindy Lu assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 2151e0a84eaSCindy Lu VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 2161e0a84eaSCindy Lu uint64_t features = 0; 2171e0a84eaSCindy Lu features |= (1ULL << VIRTIO_NET_F_HOST_UFO); 2181e0a84eaSCindy Lu features = vhost_net_get_features(s->vhost_net, features); 2191e0a84eaSCindy Lu return !!(features & (1ULL << VIRTIO_NET_F_HOST_UFO)); 2201e0a84eaSCindy Lu 2211e0a84eaSCindy Lu } 2221e0a84eaSCindy Lu 223ee8a1c63SKevin Wolf static bool vhost_vdpa_check_peer_type(NetClientState *nc, ObjectClass *oc, 224ee8a1c63SKevin Wolf Error **errp) 225ee8a1c63SKevin Wolf { 226ee8a1c63SKevin Wolf const char *driver = object_class_get_name(oc); 227ee8a1c63SKevin Wolf 228ee8a1c63SKevin Wolf if (!g_str_has_prefix(driver, "virtio-net-")) { 229ee8a1c63SKevin Wolf error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*"); 230ee8a1c63SKevin Wolf return false; 231ee8a1c63SKevin Wolf } 232ee8a1c63SKevin Wolf 233ee8a1c63SKevin Wolf return true; 234ee8a1c63SKevin Wolf } 235ee8a1c63SKevin Wolf 236846a1e85SEugenio Pérez /** Dummy receive in case qemu falls back to userland tap networking */ 237846a1e85SEugenio Pérez static ssize_t vhost_vdpa_receive(NetClientState *nc, const uint8_t *buf, 238846a1e85SEugenio Pérez size_t size) 239846a1e85SEugenio Pérez { 240bc5add1dSSi-Wei Liu return size; 241846a1e85SEugenio Pérez } 242846a1e85SEugenio Pérez 24300ef422eSEugenio Pérez /** From any vdpa net client, get the netclient of the first queue pair */ 24400ef422eSEugenio Pérez static VhostVDPAState *vhost_vdpa_net_first_nc_vdpa(VhostVDPAState *s) 24500ef422eSEugenio Pérez { 24600ef422eSEugenio Pérez NICState *nic = qemu_get_nic(s->nc.peer); 24700ef422eSEugenio Pérez NetClientState *nc0 = qemu_get_peer(nic->ncs, 0); 24800ef422eSEugenio Pérez 24900ef422eSEugenio Pérez return DO_UPCAST(VhostVDPAState, nc, nc0); 25000ef422eSEugenio Pérez } 25100ef422eSEugenio Pérez 25269498430SEugenio Pérez static void vhost_vdpa_net_log_global_enable(VhostVDPAState *s, bool enable) 25369498430SEugenio Pérez { 25469498430SEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 25569498430SEugenio Pérez VirtIONet *n; 25669498430SEugenio Pérez VirtIODevice *vdev; 25769498430SEugenio Pérez int data_queue_pairs, cvq, r; 25869498430SEugenio Pérez 25969498430SEugenio Pérez /* We are only called on the first data vqs and only if x-svq is not set */ 26069498430SEugenio Pérez if (s->vhost_vdpa.shadow_vqs_enabled == enable) { 26169498430SEugenio Pérez return; 26269498430SEugenio Pérez } 26369498430SEugenio Pérez 26469498430SEugenio Pérez vdev = v->dev->vdev; 26569498430SEugenio Pérez n = VIRTIO_NET(vdev); 26669498430SEugenio Pérez if (!n->vhost_started) { 26769498430SEugenio Pérez return; 26869498430SEugenio Pérez } 26969498430SEugenio Pérez 27069498430SEugenio Pérez data_queue_pairs = n->multiqueue ? n->max_queue_pairs : 1; 27169498430SEugenio Pérez cvq = virtio_vdev_has_feature(vdev, VIRTIO_NET_F_CTRL_VQ) ? 27269498430SEugenio Pérez n->max_ncs - n->max_queue_pairs : 0; 27369498430SEugenio Pérez /* 27469498430SEugenio Pérez * TODO: vhost_net_stop does suspend, get_base and reset. We can be smarter 27569498430SEugenio Pérez * in the future and resume the device if read-only operations between 27669498430SEugenio Pérez * suspend and reset goes wrong. 27769498430SEugenio Pérez */ 27869498430SEugenio Pérez vhost_net_stop(vdev, n->nic->ncs, data_queue_pairs, cvq); 27969498430SEugenio Pérez 28069498430SEugenio Pérez /* Start will check migration setup_or_active to configure or not SVQ */ 28169498430SEugenio Pérez r = vhost_net_start(vdev, n->nic->ncs, data_queue_pairs, cvq); 28269498430SEugenio Pérez if (unlikely(r < 0)) { 28369498430SEugenio Pérez error_report("unable to start vhost net: %s(%d)", g_strerror(-r), -r); 28469498430SEugenio Pérez } 28569498430SEugenio Pérez } 28669498430SEugenio Pérez 28769498430SEugenio Pérez static void vdpa_net_migration_state_notifier(Notifier *notifier, void *data) 28869498430SEugenio Pérez { 28969498430SEugenio Pérez MigrationState *migration = data; 29069498430SEugenio Pérez VhostVDPAState *s = container_of(notifier, VhostVDPAState, 29169498430SEugenio Pérez migration_state); 29269498430SEugenio Pérez 29369498430SEugenio Pérez if (migration_in_setup(migration)) { 29469498430SEugenio Pérez vhost_vdpa_net_log_global_enable(s, true); 29569498430SEugenio Pérez } else if (migration_has_failed(migration)) { 29669498430SEugenio Pérez vhost_vdpa_net_log_global_enable(s, false); 29769498430SEugenio Pérez } 29869498430SEugenio Pérez } 29969498430SEugenio Pérez 30000ef422eSEugenio Pérez static void vhost_vdpa_net_data_start_first(VhostVDPAState *s) 30100ef422eSEugenio Pérez { 30200ef422eSEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 30300ef422eSEugenio Pérez 30469498430SEugenio Pérez add_migration_state_change_notifier(&s->migration_state); 30500ef422eSEugenio Pérez if (v->shadow_vqs_enabled) { 30600ef422eSEugenio Pérez v->iova_tree = vhost_iova_tree_new(v->iova_range.first, 30700ef422eSEugenio Pérez v->iova_range.last); 30800ef422eSEugenio Pérez } 30900ef422eSEugenio Pérez } 31000ef422eSEugenio Pérez 31100ef422eSEugenio Pérez static int vhost_vdpa_net_data_start(NetClientState *nc) 31200ef422eSEugenio Pérez { 31300ef422eSEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 31400ef422eSEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 31500ef422eSEugenio Pérez 31600ef422eSEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 31700ef422eSEugenio Pérez 31869498430SEugenio Pérez if (s->always_svq || 31969498430SEugenio Pérez migration_is_setup_or_active(migrate_get_current()->state)) { 32069498430SEugenio Pérez v->shadow_vqs_enabled = true; 32169498430SEugenio Pérez v->shadow_data = true; 32269498430SEugenio Pérez } else { 32369498430SEugenio Pérez v->shadow_vqs_enabled = false; 32469498430SEugenio Pérez v->shadow_data = false; 32569498430SEugenio Pérez } 32669498430SEugenio Pérez 32700ef422eSEugenio Pérez if (v->index == 0) { 32800ef422eSEugenio Pérez vhost_vdpa_net_data_start_first(s); 32900ef422eSEugenio Pérez return 0; 33000ef422eSEugenio Pérez } 33100ef422eSEugenio Pérez 33200ef422eSEugenio Pérez if (v->shadow_vqs_enabled) { 33300ef422eSEugenio Pérez VhostVDPAState *s0 = vhost_vdpa_net_first_nc_vdpa(s); 33400ef422eSEugenio Pérez v->iova_tree = s0->vhost_vdpa.iova_tree; 33500ef422eSEugenio Pérez } 33600ef422eSEugenio Pérez 33700ef422eSEugenio Pérez return 0; 33800ef422eSEugenio Pérez } 33900ef422eSEugenio Pérez 34000ef422eSEugenio Pérez static void vhost_vdpa_net_client_stop(NetClientState *nc) 34100ef422eSEugenio Pérez { 34200ef422eSEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 34300ef422eSEugenio Pérez struct vhost_dev *dev; 34400ef422eSEugenio Pérez 34500ef422eSEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 34600ef422eSEugenio Pérez 34769498430SEugenio Pérez if (s->vhost_vdpa.index == 0) { 34869498430SEugenio Pérez remove_migration_state_change_notifier(&s->migration_state); 34969498430SEugenio Pérez } 35069498430SEugenio Pérez 35100ef422eSEugenio Pérez dev = s->vhost_vdpa.dev; 35200ef422eSEugenio Pérez if (dev->vq_index + dev->nvqs == dev->vq_index_end) { 35300ef422eSEugenio Pérez g_clear_pointer(&s->vhost_vdpa.iova_tree, vhost_iova_tree_delete); 35400ef422eSEugenio Pérez } 35500ef422eSEugenio Pérez } 35600ef422eSEugenio Pérez 3571e0a84eaSCindy Lu static NetClientInfo net_vhost_vdpa_info = { 3581e0a84eaSCindy Lu .type = NET_CLIENT_DRIVER_VHOST_VDPA, 3591e0a84eaSCindy Lu .size = sizeof(VhostVDPAState), 360846a1e85SEugenio Pérez .receive = vhost_vdpa_receive, 36100ef422eSEugenio Pérez .start = vhost_vdpa_net_data_start, 36200ef422eSEugenio Pérez .stop = vhost_vdpa_net_client_stop, 3631e0a84eaSCindy Lu .cleanup = vhost_vdpa_cleanup, 3641e0a84eaSCindy Lu .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, 3651e0a84eaSCindy Lu .has_ufo = vhost_vdpa_has_ufo, 366ee8a1c63SKevin Wolf .check_peer_type = vhost_vdpa_check_peer_type, 3671e0a84eaSCindy Lu }; 3681e0a84eaSCindy Lu 369*152128d6SEugenio Pérez static int64_t vhost_vdpa_get_vring_group(int device_fd, unsigned vq_index, 370*152128d6SEugenio Pérez Error **errp) 371c1a10086SEugenio Pérez { 372c1a10086SEugenio Pérez struct vhost_vring_state state = { 373c1a10086SEugenio Pérez .index = vq_index, 374c1a10086SEugenio Pérez }; 375c1a10086SEugenio Pérez int r = ioctl(device_fd, VHOST_VDPA_GET_VRING_GROUP, &state); 376c1a10086SEugenio Pérez 377c1a10086SEugenio Pérez if (unlikely(r < 0)) { 3780f2bb0bfSEugenio Pérez r = -errno; 379*152128d6SEugenio Pérez error_setg_errno(errp, errno, "Cannot get VQ %u group", vq_index); 380c1a10086SEugenio Pérez return r; 381c1a10086SEugenio Pérez } 382c1a10086SEugenio Pérez 383c1a10086SEugenio Pérez return state.num; 384c1a10086SEugenio Pérez } 385c1a10086SEugenio Pérez 386c1a10086SEugenio Pérez static int vhost_vdpa_set_address_space_id(struct vhost_vdpa *v, 387c1a10086SEugenio Pérez unsigned vq_group, 388c1a10086SEugenio Pérez unsigned asid_num) 389c1a10086SEugenio Pérez { 390c1a10086SEugenio Pérez struct vhost_vring_state asid = { 391c1a10086SEugenio Pérez .index = vq_group, 392c1a10086SEugenio Pérez .num = asid_num, 393c1a10086SEugenio Pérez }; 394c1a10086SEugenio Pérez int r; 395c1a10086SEugenio Pérez 396c1a10086SEugenio Pérez r = ioctl(v->device_fd, VHOST_VDPA_SET_GROUP_ASID, &asid); 397c1a10086SEugenio Pérez if (unlikely(r < 0)) { 398c1a10086SEugenio Pérez error_report("Can't set vq group %u asid %u, errno=%d (%s)", 399c1a10086SEugenio Pérez asid.index, asid.num, errno, g_strerror(errno)); 400c1a10086SEugenio Pérez } 401c1a10086SEugenio Pérez return r; 402c1a10086SEugenio Pérez } 403c1a10086SEugenio Pérez 4042df4dd31SEugenio Pérez static void vhost_vdpa_cvq_unmap_buf(struct vhost_vdpa *v, void *addr) 4052df4dd31SEugenio Pérez { 4062df4dd31SEugenio Pérez VhostIOVATree *tree = v->iova_tree; 4072df4dd31SEugenio Pérez DMAMap needle = { 4082df4dd31SEugenio Pérez /* 4092df4dd31SEugenio Pérez * No need to specify size or to look for more translations since 4102df4dd31SEugenio Pérez * this contiguous chunk was allocated by us. 4112df4dd31SEugenio Pérez */ 4122df4dd31SEugenio Pérez .translated_addr = (hwaddr)(uintptr_t)addr, 4132df4dd31SEugenio Pérez }; 4142df4dd31SEugenio Pérez const DMAMap *map = vhost_iova_tree_find_iova(tree, &needle); 4152df4dd31SEugenio Pérez int r; 4162df4dd31SEugenio Pérez 4172df4dd31SEugenio Pérez if (unlikely(!map)) { 4182df4dd31SEugenio Pérez error_report("Cannot locate expected map"); 4192df4dd31SEugenio Pérez return; 4202df4dd31SEugenio Pérez } 4212df4dd31SEugenio Pérez 422cd831ed5SEugenio Pérez r = vhost_vdpa_dma_unmap(v, v->address_space_id, map->iova, map->size + 1); 4232df4dd31SEugenio Pérez if (unlikely(r != 0)) { 4242df4dd31SEugenio Pérez error_report("Device cannot unmap: %s(%d)", g_strerror(r), r); 4252df4dd31SEugenio Pérez } 4262df4dd31SEugenio Pérez 42769292a8eSEugenio Pérez vhost_iova_tree_remove(tree, *map); 4282df4dd31SEugenio Pérez } 4292df4dd31SEugenio Pérez 4302df4dd31SEugenio Pérez static size_t vhost_vdpa_net_cvq_cmd_len(void) 4312df4dd31SEugenio Pérez { 4322df4dd31SEugenio Pérez /* 4332df4dd31SEugenio Pérez * MAC_TABLE_SET is the ctrl command that produces the longer out buffer. 4342df4dd31SEugenio Pérez * In buffer is always 1 byte, so it should fit here 4352df4dd31SEugenio Pérez */ 4362df4dd31SEugenio Pérez return sizeof(struct virtio_net_ctrl_hdr) + 4372df4dd31SEugenio Pérez 2 * sizeof(struct virtio_net_ctrl_mac) + 4382df4dd31SEugenio Pérez MAC_TABLE_ENTRIES * ETH_ALEN; 4392df4dd31SEugenio Pérez } 4402df4dd31SEugenio Pérez 4412df4dd31SEugenio Pérez static size_t vhost_vdpa_net_cvq_cmd_page_len(void) 4422df4dd31SEugenio Pérez { 4432df4dd31SEugenio Pérez return ROUND_UP(vhost_vdpa_net_cvq_cmd_len(), qemu_real_host_page_size()); 4442df4dd31SEugenio Pérez } 4452df4dd31SEugenio Pérez 4467a7f87e9SEugenio Pérez /** Map CVQ buffer. */ 4477a7f87e9SEugenio Pérez static int vhost_vdpa_cvq_map_buf(struct vhost_vdpa *v, void *buf, size_t size, 4487a7f87e9SEugenio Pérez bool write) 4492df4dd31SEugenio Pérez { 4502df4dd31SEugenio Pérez DMAMap map = {}; 4512df4dd31SEugenio Pérez int r; 4522df4dd31SEugenio Pérez 4532df4dd31SEugenio Pérez map.translated_addr = (hwaddr)(uintptr_t)buf; 4547a7f87e9SEugenio Pérez map.size = size - 1; 4552df4dd31SEugenio Pérez map.perm = write ? IOMMU_RW : IOMMU_RO, 4562df4dd31SEugenio Pérez r = vhost_iova_tree_map_alloc(v->iova_tree, &map); 4572df4dd31SEugenio Pérez if (unlikely(r != IOVA_OK)) { 4582df4dd31SEugenio Pérez error_report("Cannot map injected element"); 4597a7f87e9SEugenio Pérez return r; 4602df4dd31SEugenio Pérez } 4612df4dd31SEugenio Pérez 462cd831ed5SEugenio Pérez r = vhost_vdpa_dma_map(v, v->address_space_id, map.iova, 463cd831ed5SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len(), buf, !write); 4642df4dd31SEugenio Pérez if (unlikely(r < 0)) { 4652df4dd31SEugenio Pérez goto dma_map_err; 4662df4dd31SEugenio Pérez } 4672df4dd31SEugenio Pérez 4687a7f87e9SEugenio Pérez return 0; 4692df4dd31SEugenio Pérez 4702df4dd31SEugenio Pérez dma_map_err: 47169292a8eSEugenio Pérez vhost_iova_tree_remove(v->iova_tree, map); 4727a7f87e9SEugenio Pérez return r; 4732df4dd31SEugenio Pérez } 4742df4dd31SEugenio Pérez 4757a7f87e9SEugenio Pérez static int vhost_vdpa_net_cvq_start(NetClientState *nc) 4762df4dd31SEugenio Pérez { 47700ef422eSEugenio Pérez VhostVDPAState *s, *s0; 478c1a10086SEugenio Pérez struct vhost_vdpa *v; 479c1a10086SEugenio Pérez int64_t cvq_group; 480*152128d6SEugenio Pérez int r; 481*152128d6SEugenio Pérez Error *err = NULL; 4822df4dd31SEugenio Pérez 4837a7f87e9SEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 4847a7f87e9SEugenio Pérez 4857a7f87e9SEugenio Pérez s = DO_UPCAST(VhostVDPAState, nc, nc); 486c1a10086SEugenio Pérez v = &s->vhost_vdpa; 487c1a10086SEugenio Pérez 48869498430SEugenio Pérez s0 = vhost_vdpa_net_first_nc_vdpa(s); 48969498430SEugenio Pérez v->shadow_data = s0->vhost_vdpa.shadow_vqs_enabled; 490c1a10086SEugenio Pérez v->shadow_vqs_enabled = s->always_svq; 491c1a10086SEugenio Pérez s->vhost_vdpa.address_space_id = VHOST_VDPA_GUEST_PA_ASID; 492c1a10086SEugenio Pérez 49369498430SEugenio Pérez if (s->vhost_vdpa.shadow_data) { 494c1a10086SEugenio Pérez /* SVQ is already configured for all virtqueues */ 495c1a10086SEugenio Pérez goto out; 496c1a10086SEugenio Pérez } 497c1a10086SEugenio Pérez 498c1a10086SEugenio Pérez /* 499c1a10086SEugenio Pérez * If we early return in these cases SVQ will not be enabled. The migration 500c1a10086SEugenio Pérez * will be blocked as long as vhost-vdpa backends will not offer _F_LOG. 501c1a10086SEugenio Pérez */ 502*152128d6SEugenio Pérez if (!vhost_vdpa_net_valid_svq_features(v->dev->features, NULL)) { 503c1a10086SEugenio Pérez return 0; 504c1a10086SEugenio Pérez } 505c1a10086SEugenio Pérez 506*152128d6SEugenio Pérez if (!s->cvq_isolated) { 507*152128d6SEugenio Pérez return 0; 508*152128d6SEugenio Pérez } 509*152128d6SEugenio Pérez 510*152128d6SEugenio Pérez cvq_group = vhost_vdpa_get_vring_group(v->device_fd, 511*152128d6SEugenio Pérez v->dev->vq_index_end - 1, 512*152128d6SEugenio Pérez &err); 513c1a10086SEugenio Pérez if (unlikely(cvq_group < 0)) { 514*152128d6SEugenio Pérez error_report_err(err); 515c1a10086SEugenio Pérez return cvq_group; 516c1a10086SEugenio Pérez } 517c1a10086SEugenio Pérez 518c1a10086SEugenio Pérez r = vhost_vdpa_set_address_space_id(v, cvq_group, VHOST_VDPA_NET_CVQ_ASID); 519c1a10086SEugenio Pérez if (unlikely(r < 0)) { 520c1a10086SEugenio Pérez return r; 521c1a10086SEugenio Pérez } 522c1a10086SEugenio Pérez 523c1a10086SEugenio Pérez v->shadow_vqs_enabled = true; 524c1a10086SEugenio Pérez s->vhost_vdpa.address_space_id = VHOST_VDPA_NET_CVQ_ASID; 525c1a10086SEugenio Pérez 526c1a10086SEugenio Pérez out: 5277a7f87e9SEugenio Pérez if (!s->vhost_vdpa.shadow_vqs_enabled) { 5287a7f87e9SEugenio Pérez return 0; 5292df4dd31SEugenio Pérez } 5302df4dd31SEugenio Pérez 53100ef422eSEugenio Pérez if (s0->vhost_vdpa.iova_tree) { 53200ef422eSEugenio Pérez /* 53300ef422eSEugenio Pérez * SVQ is already configured for all virtqueues. Reuse IOVA tree for 53400ef422eSEugenio Pérez * simplicity, whether CVQ shares ASID with guest or not, because: 53500ef422eSEugenio Pérez * - Memory listener need access to guest's memory addresses allocated 53600ef422eSEugenio Pérez * in the IOVA tree. 53700ef422eSEugenio Pérez * - There should be plenty of IOVA address space for both ASID not to 53800ef422eSEugenio Pérez * worry about collisions between them. Guest's translations are 53900ef422eSEugenio Pérez * still validated with virtio virtqueue_pop so there is no risk for 54000ef422eSEugenio Pérez * the guest to access memory that it shouldn't. 54100ef422eSEugenio Pérez * 54200ef422eSEugenio Pérez * To allocate a iova tree per ASID is doable but it complicates the 54300ef422eSEugenio Pérez * code and it is not worth it for the moment. 54400ef422eSEugenio Pérez */ 54500ef422eSEugenio Pérez v->iova_tree = s0->vhost_vdpa.iova_tree; 54600ef422eSEugenio Pérez } else { 54700ef422eSEugenio Pérez v->iova_tree = vhost_iova_tree_new(v->iova_range.first, 54800ef422eSEugenio Pérez v->iova_range.last); 54900ef422eSEugenio Pérez } 55000ef422eSEugenio Pérez 5517a7f87e9SEugenio Pérez r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer, 5527a7f87e9SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len(), false); 5537a7f87e9SEugenio Pérez if (unlikely(r < 0)) { 5547a7f87e9SEugenio Pérez return r; 5557a7f87e9SEugenio Pérez } 5567a7f87e9SEugenio Pérez 55717fb889fSEugenio Pérez r = vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->status, 5587a7f87e9SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len(), true); 5597a7f87e9SEugenio Pérez if (unlikely(r < 0)) { 5602df4dd31SEugenio Pérez vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); 5612df4dd31SEugenio Pérez } 5622df4dd31SEugenio Pérez 5637a7f87e9SEugenio Pérez return r; 5647a7f87e9SEugenio Pérez } 5657a7f87e9SEugenio Pérez 5667a7f87e9SEugenio Pérez static void vhost_vdpa_net_cvq_stop(NetClientState *nc) 5677a7f87e9SEugenio Pérez { 5687a7f87e9SEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 5697a7f87e9SEugenio Pérez 5707a7f87e9SEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 5717a7f87e9SEugenio Pérez 5727a7f87e9SEugenio Pérez if (s->vhost_vdpa.shadow_vqs_enabled) { 5737a7f87e9SEugenio Pérez vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); 57417fb889fSEugenio Pérez vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->status); 575c1a10086SEugenio Pérez } 57600ef422eSEugenio Pérez 57700ef422eSEugenio Pérez vhost_vdpa_net_client_stop(nc); 5782df4dd31SEugenio Pérez } 5792df4dd31SEugenio Pérez 580be4278b6SEugenio Pérez static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s, size_t out_len, 581be4278b6SEugenio Pérez size_t in_len) 582be4278b6SEugenio Pérez { 583be4278b6SEugenio Pérez /* Buffers for the device */ 584be4278b6SEugenio Pérez const struct iovec out = { 585be4278b6SEugenio Pérez .iov_base = s->cvq_cmd_out_buffer, 586be4278b6SEugenio Pérez .iov_len = out_len, 587be4278b6SEugenio Pérez }; 588be4278b6SEugenio Pérez const struct iovec in = { 58917fb889fSEugenio Pérez .iov_base = s->status, 590be4278b6SEugenio Pérez .iov_len = sizeof(virtio_net_ctrl_ack), 591be4278b6SEugenio Pérez }; 592be4278b6SEugenio Pérez VhostShadowVirtqueue *svq = g_ptr_array_index(s->vhost_vdpa.shadow_vqs, 0); 593be4278b6SEugenio Pérez int r; 594be4278b6SEugenio Pérez 595be4278b6SEugenio Pérez r = vhost_svq_add(svq, &out, 1, &in, 1, NULL); 596be4278b6SEugenio Pérez if (unlikely(r != 0)) { 597be4278b6SEugenio Pérez if (unlikely(r == -ENOSPC)) { 598be4278b6SEugenio Pérez qemu_log_mask(LOG_GUEST_ERROR, "%s: No space on device queue\n", 599be4278b6SEugenio Pérez __func__); 600be4278b6SEugenio Pérez } 601be4278b6SEugenio Pérez return r; 602be4278b6SEugenio Pérez } 603be4278b6SEugenio Pérez 604be4278b6SEugenio Pérez /* 605be4278b6SEugenio Pérez * We can poll here since we've had BQL from the time we sent the 606be4278b6SEugenio Pérez * descriptor. Also, we need to take the answer before SVQ pulls by itself, 607be4278b6SEugenio Pérez * when BQL is released 608be4278b6SEugenio Pérez */ 609be4278b6SEugenio Pérez return vhost_svq_poll(svq); 610be4278b6SEugenio Pérez } 611be4278b6SEugenio Pérez 612f73c0c43SEugenio Pérez static ssize_t vhost_vdpa_net_load_cmd(VhostVDPAState *s, uint8_t class, 613f73c0c43SEugenio Pérez uint8_t cmd, const void *data, 614f73c0c43SEugenio Pérez size_t data_size) 615f73c0c43SEugenio Pérez { 616f73c0c43SEugenio Pérez const struct virtio_net_ctrl_hdr ctrl = { 617f73c0c43SEugenio Pérez .class = class, 618f73c0c43SEugenio Pérez .cmd = cmd, 619f73c0c43SEugenio Pérez }; 620f73c0c43SEugenio Pérez 621f73c0c43SEugenio Pérez assert(data_size < vhost_vdpa_net_cvq_cmd_page_len() - sizeof(ctrl)); 622f73c0c43SEugenio Pérez 623f73c0c43SEugenio Pérez memcpy(s->cvq_cmd_out_buffer, &ctrl, sizeof(ctrl)); 624f73c0c43SEugenio Pérez memcpy(s->cvq_cmd_out_buffer + sizeof(ctrl), data, data_size); 625f73c0c43SEugenio Pérez 626f73c0c43SEugenio Pérez return vhost_vdpa_net_cvq_add(s, sizeof(ctrl) + data_size, 627f73c0c43SEugenio Pérez sizeof(virtio_net_ctrl_ack)); 628f73c0c43SEugenio Pérez } 629f73c0c43SEugenio Pérez 630f73c0c43SEugenio Pérez static int vhost_vdpa_net_load_mac(VhostVDPAState *s, const VirtIONet *n) 631f73c0c43SEugenio Pérez { 632f73c0c43SEugenio Pérez uint64_t features = n->parent_obj.guest_features; 633f73c0c43SEugenio Pérez if (features & BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR)) { 634f73c0c43SEugenio Pérez ssize_t dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MAC, 635f73c0c43SEugenio Pérez VIRTIO_NET_CTRL_MAC_ADDR_SET, 636f73c0c43SEugenio Pérez n->mac, sizeof(n->mac)); 637f73c0c43SEugenio Pérez if (unlikely(dev_written < 0)) { 638f73c0c43SEugenio Pérez return dev_written; 639f73c0c43SEugenio Pérez } 640f73c0c43SEugenio Pérez 641f73c0c43SEugenio Pérez return *s->status != VIRTIO_NET_OK; 642f73c0c43SEugenio Pérez } 643f73c0c43SEugenio Pérez 644f73c0c43SEugenio Pérez return 0; 645f73c0c43SEugenio Pérez } 646f73c0c43SEugenio Pérez 647f64c7cdaSEugenio Pérez static int vhost_vdpa_net_load_mq(VhostVDPAState *s, 648f64c7cdaSEugenio Pérez const VirtIONet *n) 649f64c7cdaSEugenio Pérez { 650f64c7cdaSEugenio Pérez struct virtio_net_ctrl_mq mq; 651f64c7cdaSEugenio Pérez uint64_t features = n->parent_obj.guest_features; 652f64c7cdaSEugenio Pérez ssize_t dev_written; 653f64c7cdaSEugenio Pérez 654f64c7cdaSEugenio Pérez if (!(features & BIT_ULL(VIRTIO_NET_F_MQ))) { 655f64c7cdaSEugenio Pérez return 0; 656f64c7cdaSEugenio Pérez } 657f64c7cdaSEugenio Pérez 658f64c7cdaSEugenio Pérez mq.virtqueue_pairs = cpu_to_le16(n->curr_queue_pairs); 659f64c7cdaSEugenio Pérez dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_MQ, 660f64c7cdaSEugenio Pérez VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &mq, 661f64c7cdaSEugenio Pérez sizeof(mq)); 662f64c7cdaSEugenio Pérez if (unlikely(dev_written < 0)) { 663f64c7cdaSEugenio Pérez return dev_written; 664f64c7cdaSEugenio Pérez } 665f64c7cdaSEugenio Pérez 666f64c7cdaSEugenio Pérez return *s->status != VIRTIO_NET_OK; 667f64c7cdaSEugenio Pérez } 668f64c7cdaSEugenio Pérez 669dd036d8dSEugenio Pérez static int vhost_vdpa_net_load(NetClientState *nc) 670dd036d8dSEugenio Pérez { 671dd036d8dSEugenio Pérez VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc); 672f73c0c43SEugenio Pérez struct vhost_vdpa *v = &s->vhost_vdpa; 673dd036d8dSEugenio Pérez const VirtIONet *n; 674f73c0c43SEugenio Pérez int r; 675dd036d8dSEugenio Pérez 676dd036d8dSEugenio Pérez assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); 677dd036d8dSEugenio Pérez 678dd036d8dSEugenio Pérez if (!v->shadow_vqs_enabled) { 679dd036d8dSEugenio Pérez return 0; 680dd036d8dSEugenio Pérez } 681dd036d8dSEugenio Pérez 682dd036d8dSEugenio Pérez n = VIRTIO_NET(v->dev->vdev); 683f73c0c43SEugenio Pérez r = vhost_vdpa_net_load_mac(s, n); 684f73c0c43SEugenio Pérez if (unlikely(r < 0)) { 685f73c0c43SEugenio Pérez return r; 686dd036d8dSEugenio Pérez } 687f64c7cdaSEugenio Pérez r = vhost_vdpa_net_load_mq(s, n); 688f64c7cdaSEugenio Pérez if (unlikely(r)) { 689f64c7cdaSEugenio Pérez return r; 690f64c7cdaSEugenio Pérez } 691dd036d8dSEugenio Pérez 692dd036d8dSEugenio Pérez return 0; 693dd036d8dSEugenio Pérez } 694dd036d8dSEugenio Pérez 695f8972b56SEugenio Pérez static NetClientInfo net_vhost_vdpa_cvq_info = { 696f8972b56SEugenio Pérez .type = NET_CLIENT_DRIVER_VHOST_VDPA, 697f8972b56SEugenio Pérez .size = sizeof(VhostVDPAState), 698f8972b56SEugenio Pérez .receive = vhost_vdpa_receive, 6997a7f87e9SEugenio Pérez .start = vhost_vdpa_net_cvq_start, 700dd036d8dSEugenio Pérez .load = vhost_vdpa_net_load, 7017a7f87e9SEugenio Pérez .stop = vhost_vdpa_net_cvq_stop, 702f8972b56SEugenio Pérez .cleanup = vhost_vdpa_cleanup, 703f8972b56SEugenio Pérez .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, 704f8972b56SEugenio Pérez .has_ufo = vhost_vdpa_has_ufo, 705f8972b56SEugenio Pérez .check_peer_type = vhost_vdpa_check_peer_type, 706f8972b56SEugenio Pérez }; 707f8972b56SEugenio Pérez 7082df4dd31SEugenio Pérez /** 7092df4dd31SEugenio Pérez * Validate and copy control virtqueue commands. 7102df4dd31SEugenio Pérez * 7112df4dd31SEugenio Pérez * Following QEMU guidelines, we offer a copy of the buffers to the device to 7122df4dd31SEugenio Pérez * prevent TOCTOU bugs. 713bd907ae4SEugenio Pérez */ 714bd907ae4SEugenio Pérez static int vhost_vdpa_net_handle_ctrl_avail(VhostShadowVirtqueue *svq, 715bd907ae4SEugenio Pérez VirtQueueElement *elem, 716bd907ae4SEugenio Pérez void *opaque) 717bd907ae4SEugenio Pérez { 7182df4dd31SEugenio Pérez VhostVDPAState *s = opaque; 719be4278b6SEugenio Pérez size_t in_len; 720bd907ae4SEugenio Pérez virtio_net_ctrl_ack status = VIRTIO_NET_ERR; 7217a7f87e9SEugenio Pérez /* Out buffer sent to both the vdpa device and the device model */ 7227a7f87e9SEugenio Pérez struct iovec out = { 7237a7f87e9SEugenio Pérez .iov_base = s->cvq_cmd_out_buffer, 7247a7f87e9SEugenio Pérez }; 7252df4dd31SEugenio Pérez /* in buffer used for device model */ 7262df4dd31SEugenio Pérez const struct iovec in = { 7272df4dd31SEugenio Pérez .iov_base = &status, 7282df4dd31SEugenio Pérez .iov_len = sizeof(status), 7292df4dd31SEugenio Pérez }; 730be4278b6SEugenio Pérez ssize_t dev_written = -EINVAL; 731bd907ae4SEugenio Pérez 7327a7f87e9SEugenio Pérez out.iov_len = iov_to_buf(elem->out_sg, elem->out_num, 0, 7337a7f87e9SEugenio Pérez s->cvq_cmd_out_buffer, 7347a7f87e9SEugenio Pérez vhost_vdpa_net_cvq_cmd_len()); 7353f9a3eebSEugenio Pérez if (*(uint8_t *)s->cvq_cmd_out_buffer == VIRTIO_NET_CTRL_ANNOUNCE) { 7363f9a3eebSEugenio Pérez /* 7373f9a3eebSEugenio Pérez * Guest announce capability is emulated by qemu, so don't forward to 7383f9a3eebSEugenio Pérez * the device. 7393f9a3eebSEugenio Pérez */ 7403f9a3eebSEugenio Pérez dev_written = sizeof(status); 7413f9a3eebSEugenio Pérez *s->status = VIRTIO_NET_OK; 7423f9a3eebSEugenio Pérez } else { 743be4278b6SEugenio Pérez dev_written = vhost_vdpa_net_cvq_add(s, out.iov_len, sizeof(status)); 744be4278b6SEugenio Pérez if (unlikely(dev_written < 0)) { 745bd907ae4SEugenio Pérez goto out; 746bd907ae4SEugenio Pérez } 7473f9a3eebSEugenio Pérez } 748bd907ae4SEugenio Pérez 749bd907ae4SEugenio Pérez if (unlikely(dev_written < sizeof(status))) { 750bd907ae4SEugenio Pérez error_report("Insufficient written data (%zu)", dev_written); 7512df4dd31SEugenio Pérez goto out; 7522df4dd31SEugenio Pérez } 7532df4dd31SEugenio Pérez 75417fb889fSEugenio Pérez if (*s->status != VIRTIO_NET_OK) { 755be4278b6SEugenio Pérez return VIRTIO_NET_ERR; 7562df4dd31SEugenio Pérez } 7572df4dd31SEugenio Pérez 7582df4dd31SEugenio Pérez status = VIRTIO_NET_ERR; 7597a7f87e9SEugenio Pérez virtio_net_handle_ctrl_iov(svq->vdev, &in, 1, &out, 1); 7602df4dd31SEugenio Pérez if (status != VIRTIO_NET_OK) { 7612df4dd31SEugenio Pérez error_report("Bad CVQ processing in model"); 762bd907ae4SEugenio Pérez } 763bd907ae4SEugenio Pérez 764bd907ae4SEugenio Pérez out: 765bd907ae4SEugenio Pérez in_len = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, 766bd907ae4SEugenio Pérez sizeof(status)); 767bd907ae4SEugenio Pérez if (unlikely(in_len < sizeof(status))) { 768bd907ae4SEugenio Pérez error_report("Bad device CVQ written length"); 769bd907ae4SEugenio Pérez } 770bd907ae4SEugenio Pérez vhost_svq_push_elem(svq, elem, MIN(in_len, sizeof(status))); 771bd907ae4SEugenio Pérez g_free(elem); 772be4278b6SEugenio Pérez return dev_written < 0 ? dev_written : 0; 773bd907ae4SEugenio Pérez } 774bd907ae4SEugenio Pérez 775bd907ae4SEugenio Pérez static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = { 776bd907ae4SEugenio Pérez .avail_handler = vhost_vdpa_net_handle_ctrl_avail, 777bd907ae4SEugenio Pérez }; 778bd907ae4SEugenio Pérez 779*152128d6SEugenio Pérez /** 780*152128d6SEugenio Pérez * Probe if CVQ is isolated 781*152128d6SEugenio Pérez * 782*152128d6SEugenio Pérez * @device_fd The vdpa device fd 783*152128d6SEugenio Pérez * @features Features offered by the device. 784*152128d6SEugenio Pérez * @cvq_index The control vq pair index 785*152128d6SEugenio Pérez * 786*152128d6SEugenio Pérez * Returns <0 in case of failure, 0 if false and 1 if true. 787*152128d6SEugenio Pérez */ 788*152128d6SEugenio Pérez static int vhost_vdpa_probe_cvq_isolation(int device_fd, uint64_t features, 789*152128d6SEugenio Pérez int cvq_index, Error **errp) 790*152128d6SEugenio Pérez { 791*152128d6SEugenio Pérez uint64_t backend_features; 792*152128d6SEugenio Pérez int64_t cvq_group; 793*152128d6SEugenio Pérez uint8_t status = VIRTIO_CONFIG_S_ACKNOWLEDGE | 794*152128d6SEugenio Pérez VIRTIO_CONFIG_S_DRIVER | 795*152128d6SEugenio Pérez VIRTIO_CONFIG_S_FEATURES_OK; 796*152128d6SEugenio Pérez int r; 797*152128d6SEugenio Pérez 798*152128d6SEugenio Pérez ERRP_GUARD(); 799*152128d6SEugenio Pérez 800*152128d6SEugenio Pérez r = ioctl(device_fd, VHOST_GET_BACKEND_FEATURES, &backend_features); 801*152128d6SEugenio Pérez if (unlikely(r < 0)) { 802*152128d6SEugenio Pérez error_setg_errno(errp, errno, "Cannot get vdpa backend_features"); 803*152128d6SEugenio Pérez return r; 804*152128d6SEugenio Pérez } 805*152128d6SEugenio Pérez 806*152128d6SEugenio Pérez if (!(backend_features & BIT_ULL(VHOST_BACKEND_F_IOTLB_ASID))) { 807*152128d6SEugenio Pérez return 0; 808*152128d6SEugenio Pérez } 809*152128d6SEugenio Pérez 810*152128d6SEugenio Pérez r = ioctl(device_fd, VHOST_SET_FEATURES, &features); 811*152128d6SEugenio Pérez if (unlikely(r)) { 812*152128d6SEugenio Pérez error_setg_errno(errp, errno, "Cannot set features"); 813*152128d6SEugenio Pérez } 814*152128d6SEugenio Pérez 815*152128d6SEugenio Pérez r = ioctl(device_fd, VHOST_VDPA_SET_STATUS, &status); 816*152128d6SEugenio Pérez if (unlikely(r)) { 817*152128d6SEugenio Pérez error_setg_errno(errp, -r, "Cannot set device features"); 818*152128d6SEugenio Pérez goto out; 819*152128d6SEugenio Pérez } 820*152128d6SEugenio Pérez 821*152128d6SEugenio Pérez cvq_group = vhost_vdpa_get_vring_group(device_fd, cvq_index, errp); 822*152128d6SEugenio Pérez if (unlikely(cvq_group < 0)) { 823*152128d6SEugenio Pérez if (cvq_group != -ENOTSUP) { 824*152128d6SEugenio Pérez r = cvq_group; 825*152128d6SEugenio Pérez goto out; 826*152128d6SEugenio Pérez } 827*152128d6SEugenio Pérez 828*152128d6SEugenio Pérez /* 829*152128d6SEugenio Pérez * The kernel report VHOST_BACKEND_F_IOTLB_ASID if the vdpa frontend 830*152128d6SEugenio Pérez * support ASID even if the parent driver does not. The CVQ cannot be 831*152128d6SEugenio Pérez * isolated in this case. 832*152128d6SEugenio Pérez */ 833*152128d6SEugenio Pérez error_free(*errp); 834*152128d6SEugenio Pérez *errp = NULL; 835*152128d6SEugenio Pérez r = 0; 836*152128d6SEugenio Pérez goto out; 837*152128d6SEugenio Pérez } 838*152128d6SEugenio Pérez 839*152128d6SEugenio Pérez for (int i = 0; i < cvq_index; ++i) { 840*152128d6SEugenio Pérez int64_t group = vhost_vdpa_get_vring_group(device_fd, i, errp); 841*152128d6SEugenio Pérez if (unlikely(group < 0)) { 842*152128d6SEugenio Pérez r = group; 843*152128d6SEugenio Pérez goto out; 844*152128d6SEugenio Pérez } 845*152128d6SEugenio Pérez 846*152128d6SEugenio Pérez if (group == (int64_t)cvq_group) { 847*152128d6SEugenio Pérez r = 0; 848*152128d6SEugenio Pérez goto out; 849*152128d6SEugenio Pérez } 850*152128d6SEugenio Pérez } 851*152128d6SEugenio Pérez 852*152128d6SEugenio Pérez r = 1; 853*152128d6SEugenio Pérez 854*152128d6SEugenio Pérez out: 855*152128d6SEugenio Pérez status = 0; 856*152128d6SEugenio Pérez ioctl(device_fd, VHOST_VDPA_SET_STATUS, &status); 857*152128d6SEugenio Pérez return r; 858*152128d6SEugenio Pérez } 859*152128d6SEugenio Pérez 860654790b6SJason Wang static NetClientState *net_vhost_vdpa_init(NetClientState *peer, 861654790b6SJason Wang const char *device, 862654790b6SJason Wang const char *name, 86340237840SJason Wang int vdpa_device_fd, 86440237840SJason Wang int queue_pair_index, 86540237840SJason Wang int nvqs, 8661576dbb5SEugenio Pérez bool is_datapath, 8671576dbb5SEugenio Pérez bool svq, 8685c1ebd4cSEugenio Pérez struct vhost_vdpa_iova_range iova_range, 869*152128d6SEugenio Pérez uint64_t features, 870*152128d6SEugenio Pérez Error **errp) 8711e0a84eaSCindy Lu { 8721e0a84eaSCindy Lu NetClientState *nc = NULL; 8731e0a84eaSCindy Lu VhostVDPAState *s; 8741e0a84eaSCindy Lu int ret = 0; 8751e0a84eaSCindy Lu assert(name); 876*152128d6SEugenio Pérez int cvq_isolated; 877*152128d6SEugenio Pérez 87840237840SJason Wang if (is_datapath) { 87940237840SJason Wang nc = qemu_new_net_client(&net_vhost_vdpa_info, peer, device, 88040237840SJason Wang name); 88140237840SJason Wang } else { 882*152128d6SEugenio Pérez cvq_isolated = vhost_vdpa_probe_cvq_isolation(vdpa_device_fd, features, 883*152128d6SEugenio Pérez queue_pair_index * 2, 884*152128d6SEugenio Pérez errp); 885*152128d6SEugenio Pérez if (unlikely(cvq_isolated < 0)) { 886*152128d6SEugenio Pérez return NULL; 887*152128d6SEugenio Pérez } 888*152128d6SEugenio Pérez 889f8972b56SEugenio Pérez nc = qemu_new_net_control_client(&net_vhost_vdpa_cvq_info, peer, 89040237840SJason Wang device, name); 89140237840SJason Wang } 89253b85d95SLaurent Vivier qemu_set_info_str(nc, TYPE_VHOST_VDPA); 8931e0a84eaSCindy Lu s = DO_UPCAST(VhostVDPAState, nc, nc); 8947327813dSJason Wang 8951e0a84eaSCindy Lu s->vhost_vdpa.device_fd = vdpa_device_fd; 89640237840SJason Wang s->vhost_vdpa.index = queue_pair_index; 8977f211a28SEugenio Pérez s->always_svq = svq; 89869498430SEugenio Pérez s->migration_state.notify = vdpa_net_migration_state_notifier; 8991576dbb5SEugenio Pérez s->vhost_vdpa.shadow_vqs_enabled = svq; 900a585fad2SEugenio Pérez s->vhost_vdpa.iova_range = iova_range; 9016188d78aSEugenio Pérez s->vhost_vdpa.shadow_data = svq; 9025c1ebd4cSEugenio Pérez if (queue_pair_index == 0) { 9035c1ebd4cSEugenio Pérez vhost_vdpa_net_valid_svq_features(features, 9045c1ebd4cSEugenio Pérez &s->vhost_vdpa.migration_blocker); 9055c1ebd4cSEugenio Pérez } else if (!is_datapath) { 9062df4dd31SEugenio Pérez s->cvq_cmd_out_buffer = qemu_memalign(qemu_real_host_page_size(), 9072df4dd31SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len()); 9082df4dd31SEugenio Pérez memset(s->cvq_cmd_out_buffer, 0, vhost_vdpa_net_cvq_cmd_page_len()); 90917fb889fSEugenio Pérez s->status = qemu_memalign(qemu_real_host_page_size(), 9102df4dd31SEugenio Pérez vhost_vdpa_net_cvq_cmd_page_len()); 91117fb889fSEugenio Pérez memset(s->status, 0, vhost_vdpa_net_cvq_cmd_page_len()); 9122df4dd31SEugenio Pérez 913bd907ae4SEugenio Pérez s->vhost_vdpa.shadow_vq_ops = &vhost_vdpa_net_svq_ops; 914bd907ae4SEugenio Pérez s->vhost_vdpa.shadow_vq_ops_opaque = s; 915*152128d6SEugenio Pérez s->cvq_isolated = cvq_isolated; 9169c363cf6SEugenio Pérez 9179c363cf6SEugenio Pérez /* 9189c363cf6SEugenio Pérez * TODO: We cannot migrate devices with CVQ as there is no way to set 9199c363cf6SEugenio Pérez * the device state (MAC, MQ, etc) before starting the datapath. 9209c363cf6SEugenio Pérez * 9219c363cf6SEugenio Pérez * Migration blocker ownership now belongs to s->vhost_vdpa. 9229c363cf6SEugenio Pérez */ 9239c363cf6SEugenio Pérez error_setg(&s->vhost_vdpa.migration_blocker, 9249c363cf6SEugenio Pérez "net vdpa cannot migrate with CVQ feature"); 925bd907ae4SEugenio Pérez } 92640237840SJason Wang ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, nvqs); 92774af5eecSJason Wang if (ret) { 92874af5eecSJason Wang qemu_del_net_client(nc); 929654790b6SJason Wang return NULL; 93074af5eecSJason Wang } 931654790b6SJason Wang return nc; 9321e0a84eaSCindy Lu } 9331e0a84eaSCindy Lu 9348170ab3fSEugenio Pérez static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp) 9358170ab3fSEugenio Pérez { 9368170ab3fSEugenio Pérez int ret = ioctl(fd, VHOST_GET_FEATURES, features); 9378170ab3fSEugenio Pérez if (unlikely(ret < 0)) { 9388170ab3fSEugenio Pérez error_setg_errno(errp, errno, 9398170ab3fSEugenio Pérez "Fail to query features from vhost-vDPA device"); 9408170ab3fSEugenio Pérez } 9418170ab3fSEugenio Pérez return ret; 9428170ab3fSEugenio Pérez } 9438170ab3fSEugenio Pérez 9448170ab3fSEugenio Pérez static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features, 9458170ab3fSEugenio Pérez int *has_cvq, Error **errp) 94640237840SJason Wang { 94740237840SJason Wang unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); 948cd523a41SStefano Garzarella g_autofree struct vhost_vdpa_config *config = NULL; 94940237840SJason Wang __virtio16 *max_queue_pairs; 95040237840SJason Wang int ret; 95140237840SJason Wang 95240237840SJason Wang if (features & (1 << VIRTIO_NET_F_CTRL_VQ)) { 95340237840SJason Wang *has_cvq = 1; 95440237840SJason Wang } else { 95540237840SJason Wang *has_cvq = 0; 95640237840SJason Wang } 95740237840SJason Wang 95840237840SJason Wang if (features & (1 << VIRTIO_NET_F_MQ)) { 95940237840SJason Wang config = g_malloc0(config_size + sizeof(*max_queue_pairs)); 96040237840SJason Wang config->off = offsetof(struct virtio_net_config, max_virtqueue_pairs); 96140237840SJason Wang config->len = sizeof(*max_queue_pairs); 96240237840SJason Wang 96340237840SJason Wang ret = ioctl(fd, VHOST_VDPA_GET_CONFIG, config); 96440237840SJason Wang if (ret) { 96540237840SJason Wang error_setg(errp, "Fail to get config from vhost-vDPA device"); 96640237840SJason Wang return -ret; 96740237840SJason Wang } 96840237840SJason Wang 96940237840SJason Wang max_queue_pairs = (__virtio16 *)&config->buf; 97040237840SJason Wang 97140237840SJason Wang return lduw_le_p(max_queue_pairs); 97240237840SJason Wang } 97340237840SJason Wang 97440237840SJason Wang return 1; 97540237840SJason Wang } 97640237840SJason Wang 9771e0a84eaSCindy Lu int net_init_vhost_vdpa(const Netdev *netdev, const char *name, 9781e0a84eaSCindy Lu NetClientState *peer, Error **errp) 9791e0a84eaSCindy Lu { 9801e0a84eaSCindy Lu const NetdevVhostVDPAOptions *opts; 9818170ab3fSEugenio Pérez uint64_t features; 982654790b6SJason Wang int vdpa_device_fd; 983eb3cb751SEugenio Pérez g_autofree NetClientState **ncs = NULL; 984a585fad2SEugenio Pérez struct vhost_vdpa_iova_range iova_range; 985eb3cb751SEugenio Pérez NetClientState *nc; 986aed5da45SEugenio Pérez int queue_pairs, r, i = 0, has_cvq = 0; 9871e0a84eaSCindy Lu 9881e0a84eaSCindy Lu assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA); 9891e0a84eaSCindy Lu opts = &netdev->u.vhost_vdpa; 9907480874aSMarkus Armbruster if (!opts->vhostdev && !opts->vhostfd) { 9918801ccd0SSi-Wei Liu error_setg(errp, 9928801ccd0SSi-Wei Liu "vhost-vdpa: neither vhostdev= nor vhostfd= was specified"); 993c8295404SEugenio Pérez return -1; 994c8295404SEugenio Pérez } 9957327813dSJason Wang 9967480874aSMarkus Armbruster if (opts->vhostdev && opts->vhostfd) { 9978801ccd0SSi-Wei Liu error_setg(errp, 9988801ccd0SSi-Wei Liu "vhost-vdpa: vhostdev= and vhostfd= are mutually exclusive"); 9998801ccd0SSi-Wei Liu return -1; 10008801ccd0SSi-Wei Liu } 10018801ccd0SSi-Wei Liu 10027480874aSMarkus Armbruster if (opts->vhostdev) { 10030351152bSEugenio Pérez vdpa_device_fd = qemu_open(opts->vhostdev, O_RDWR, errp); 10047327813dSJason Wang if (vdpa_device_fd == -1) { 10057327813dSJason Wang return -errno; 10067327813dSJason Wang } 10075107fd3eSPeter Maydell } else { 10085107fd3eSPeter Maydell /* has_vhostfd */ 10098801ccd0SSi-Wei Liu vdpa_device_fd = monitor_fd_param(monitor_cur(), opts->vhostfd, errp); 10108801ccd0SSi-Wei Liu if (vdpa_device_fd == -1) { 10118801ccd0SSi-Wei Liu error_prepend(errp, "vhost-vdpa: unable to parse vhostfd: "); 10128801ccd0SSi-Wei Liu return -1; 10138801ccd0SSi-Wei Liu } 10148801ccd0SSi-Wei Liu } 10157327813dSJason Wang 10168170ab3fSEugenio Pérez r = vhost_vdpa_get_features(vdpa_device_fd, &features, errp); 10178170ab3fSEugenio Pérez if (unlikely(r < 0)) { 1018aed5da45SEugenio Pérez goto err; 10198170ab3fSEugenio Pérez } 10208170ab3fSEugenio Pérez 10218170ab3fSEugenio Pérez queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, features, 102240237840SJason Wang &has_cvq, errp); 102340237840SJason Wang if (queue_pairs < 0) { 10247327813dSJason Wang qemu_close(vdpa_device_fd); 102540237840SJason Wang return queue_pairs; 10267327813dSJason Wang } 10277327813dSJason Wang 1028bf7a2ad8SLongpeng r = vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range); 1029bf7a2ad8SLongpeng if (unlikely(r < 0)) { 1030bf7a2ad8SLongpeng error_setg(errp, "vhost-vdpa: get iova range failed: %s", 1031bf7a2ad8SLongpeng strerror(-r)); 1032bf7a2ad8SLongpeng goto err; 1033bf7a2ad8SLongpeng } 1034bf7a2ad8SLongpeng 103500ef422eSEugenio Pérez if (opts->x_svq && !vhost_vdpa_net_valid_svq_features(features, errp)) { 103600ef422eSEugenio Pérez goto err; 10371576dbb5SEugenio Pérez } 10381576dbb5SEugenio Pérez 103940237840SJason Wang ncs = g_malloc0(sizeof(*ncs) * queue_pairs); 104040237840SJason Wang 104140237840SJason Wang for (i = 0; i < queue_pairs; i++) { 104240237840SJason Wang ncs[i] = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, 10431576dbb5SEugenio Pérez vdpa_device_fd, i, 2, true, opts->x_svq, 1044*152128d6SEugenio Pérez iova_range, features, errp); 104540237840SJason Wang if (!ncs[i]) 104640237840SJason Wang goto err; 104740237840SJason Wang } 104840237840SJason Wang 104940237840SJason Wang if (has_cvq) { 105040237840SJason Wang nc = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, 10511576dbb5SEugenio Pérez vdpa_device_fd, i, 1, false, 1052*152128d6SEugenio Pérez opts->x_svq, iova_range, features, errp); 105340237840SJason Wang if (!nc) 105440237840SJason Wang goto err; 105540237840SJason Wang } 105640237840SJason Wang 1057654790b6SJason Wang return 0; 105840237840SJason Wang 105940237840SJason Wang err: 106040237840SJason Wang if (i) { 10619bd05507SSi-Wei Liu for (i--; i >= 0; i--) { 10629bd05507SSi-Wei Liu qemu_del_net_client(ncs[i]); 10639bd05507SSi-Wei Liu } 106440237840SJason Wang } 10651576dbb5SEugenio Pérez 106640237840SJason Wang qemu_close(vdpa_device_fd); 106740237840SJason Wang 106840237840SJason Wang return -1; 10691e0a84eaSCindy Lu } 1070