1 /* 2 * vhost-vdpa 3 * 4 * Copyright(c) 2017-2018 Intel Corporation. 5 * Copyright(c) 2020 Red Hat, Inc. 6 * 7 * This work is licensed under the terms of the GNU GPL, version 2 or later. 8 * See the COPYING file in the top-level directory. 9 * 10 */ 11 12 #include "qemu/osdep.h" 13 #include <linux/vhost.h> 14 #include <linux/vfio.h> 15 #include <sys/eventfd.h> 16 #include <sys/ioctl.h> 17 #include "hw/virtio/vhost.h" 18 #include "hw/virtio/vhost-backend.h" 19 #include "hw/virtio/virtio-net.h" 20 #include "hw/virtio/vhost-vdpa.h" 21 #include "exec/address-spaces.h" 22 #include "qemu/main-loop.h" 23 #include "cpu.h" 24 #include "trace.h" 25 #include "qemu-common.h" 26 27 static bool vhost_vdpa_listener_skipped_section(MemoryRegionSection *section) 28 { 29 return (!memory_region_is_ram(section->mr) && 30 !memory_region_is_iommu(section->mr)) || 31 /* vhost-vDPA doesn't allow MMIO to be mapped */ 32 memory_region_is_ram_device(section->mr) || 33 /* 34 * Sizing an enabled 64-bit BAR can cause spurious mappings to 35 * addresses in the upper part of the 64-bit address space. These 36 * are never accessed by the CPU and beyond the address width of 37 * some IOMMU hardware. TODO: VDPA should tell us the IOMMU width. 38 */ 39 section->offset_within_address_space & (1ULL << 63); 40 } 41 42 static int vhost_vdpa_dma_map(struct vhost_vdpa *v, hwaddr iova, hwaddr size, 43 void *vaddr, bool readonly) 44 { 45 struct vhost_msg_v2 msg = {}; 46 int fd = v->device_fd; 47 int ret = 0; 48 49 msg.type = v->msg_type; 50 msg.iotlb.iova = iova; 51 msg.iotlb.size = size; 52 msg.iotlb.uaddr = (uint64_t)(uintptr_t)vaddr; 53 msg.iotlb.perm = readonly ? VHOST_ACCESS_RO : VHOST_ACCESS_RW; 54 msg.iotlb.type = VHOST_IOTLB_UPDATE; 55 56 trace_vhost_vdpa_dma_map(v, fd, msg.type, msg.iotlb.iova, msg.iotlb.size, 57 msg.iotlb.uaddr, msg.iotlb.perm, msg.iotlb.type); 58 59 if (write(fd, &msg, sizeof(msg)) != sizeof(msg)) { 60 error_report("failed to write, fd=%d, errno=%d (%s)", 61 fd, errno, strerror(errno)); 62 return -EIO ; 63 } 64 65 return ret; 66 } 67 68 static int vhost_vdpa_dma_unmap(struct vhost_vdpa *v, hwaddr iova, 69 hwaddr size) 70 { 71 struct vhost_msg_v2 msg = {}; 72 int fd = v->device_fd; 73 int ret = 0; 74 75 msg.type = v->msg_type; 76 msg.iotlb.iova = iova; 77 msg.iotlb.size = size; 78 msg.iotlb.type = VHOST_IOTLB_INVALIDATE; 79 80 trace_vhost_vdpa_dma_unmap(v, fd, msg.type, msg.iotlb.iova, 81 msg.iotlb.size, msg.iotlb.type); 82 83 if (write(fd, &msg, sizeof(msg)) != sizeof(msg)) { 84 error_report("failed to write, fd=%d, errno=%d (%s)", 85 fd, errno, strerror(errno)); 86 return -EIO ; 87 } 88 89 return ret; 90 } 91 92 static void vhost_vdpa_listener_begin(MemoryListener *listener) 93 { 94 struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener); 95 struct vhost_dev *dev = v->dev; 96 struct vhost_msg_v2 msg = {}; 97 int fd = v->device_fd; 98 99 if (!(dev->backend_cap & (0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH))) { 100 return; 101 } 102 103 msg.type = v->msg_type; 104 msg.iotlb.type = VHOST_IOTLB_BATCH_BEGIN; 105 106 if (write(fd, &msg, sizeof(msg)) != sizeof(msg)) { 107 error_report("failed to write, fd=%d, errno=%d (%s)", 108 fd, errno, strerror(errno)); 109 } 110 } 111 112 static void vhost_vdpa_listener_commit(MemoryListener *listener) 113 { 114 struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener); 115 struct vhost_dev *dev = v->dev; 116 struct vhost_msg_v2 msg = {}; 117 int fd = v->device_fd; 118 119 if (!(dev->backend_cap & (0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH))) { 120 return; 121 } 122 123 msg.type = v->msg_type; 124 msg.iotlb.type = VHOST_IOTLB_BATCH_END; 125 126 if (write(fd, &msg, sizeof(msg)) != sizeof(msg)) { 127 error_report("failed to write, fd=%d, errno=%d (%s)", 128 fd, errno, strerror(errno)); 129 } 130 } 131 132 static void vhost_vdpa_listener_region_add(MemoryListener *listener, 133 MemoryRegionSection *section) 134 { 135 struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener); 136 hwaddr iova; 137 Int128 llend, llsize; 138 void *vaddr; 139 int ret; 140 141 if (vhost_vdpa_listener_skipped_section(section)) { 142 return; 143 } 144 145 if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) != 146 (section->offset_within_region & ~TARGET_PAGE_MASK))) { 147 error_report("%s received unaligned region", __func__); 148 return; 149 } 150 151 iova = TARGET_PAGE_ALIGN(section->offset_within_address_space); 152 llend = int128_make64(section->offset_within_address_space); 153 llend = int128_add(llend, section->size); 154 llend = int128_and(llend, int128_exts64(TARGET_PAGE_MASK)); 155 156 if (int128_ge(int128_make64(iova), llend)) { 157 return; 158 } 159 160 memory_region_ref(section->mr); 161 162 /* Here we assume that memory_region_is_ram(section->mr)==true */ 163 164 vaddr = memory_region_get_ram_ptr(section->mr) + 165 section->offset_within_region + 166 (iova - section->offset_within_address_space); 167 168 trace_vhost_vdpa_listener_region_add(v, iova, int128_get64(llend), 169 vaddr, section->readonly); 170 171 llsize = int128_sub(llend, int128_make64(iova)); 172 173 ret = vhost_vdpa_dma_map(v, iova, int128_get64(llsize), 174 vaddr, section->readonly); 175 if (ret) { 176 error_report("vhost vdpa map fail!"); 177 goto fail; 178 } 179 180 return; 181 182 fail: 183 /* 184 * On the initfn path, store the first error in the container so we 185 * can gracefully fail. Runtime, there's not much we can do other 186 * than throw a hardware error. 187 */ 188 error_report("vhost-vdpa: DMA mapping failed, unable to continue"); 189 return; 190 191 } 192 193 static void vhost_vdpa_listener_region_del(MemoryListener *listener, 194 MemoryRegionSection *section) 195 { 196 struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener); 197 hwaddr iova; 198 Int128 llend, llsize; 199 int ret; 200 201 if (vhost_vdpa_listener_skipped_section(section)) { 202 return; 203 } 204 205 if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) != 206 (section->offset_within_region & ~TARGET_PAGE_MASK))) { 207 error_report("%s received unaligned region", __func__); 208 return; 209 } 210 211 iova = TARGET_PAGE_ALIGN(section->offset_within_address_space); 212 llend = int128_make64(section->offset_within_address_space); 213 llend = int128_add(llend, section->size); 214 llend = int128_and(llend, int128_exts64(TARGET_PAGE_MASK)); 215 216 trace_vhost_vdpa_listener_region_del(v, iova, int128_get64(llend)); 217 218 if (int128_ge(int128_make64(iova), llend)) { 219 return; 220 } 221 222 llsize = int128_sub(llend, int128_make64(iova)); 223 224 ret = vhost_vdpa_dma_unmap(v, iova, int128_get64(llsize)); 225 if (ret) { 226 error_report("vhost_vdpa dma unmap error!"); 227 } 228 229 memory_region_unref(section->mr); 230 } 231 /* 232 * IOTLB API is used by vhost-vpda which requires incremental updating 233 * of the mapping. So we can not use generic vhost memory listener which 234 * depends on the addnop(). 235 */ 236 static const MemoryListener vhost_vdpa_memory_listener = { 237 .begin = vhost_vdpa_listener_begin, 238 .commit = vhost_vdpa_listener_commit, 239 .region_add = vhost_vdpa_listener_region_add, 240 .region_del = vhost_vdpa_listener_region_del, 241 }; 242 243 static int vhost_vdpa_call(struct vhost_dev *dev, unsigned long int request, 244 void *arg) 245 { 246 struct vhost_vdpa *v = dev->opaque; 247 int fd = v->device_fd; 248 int ret; 249 250 assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); 251 252 ret = ioctl(fd, request, arg); 253 return ret < 0 ? -errno : ret; 254 } 255 256 static void vhost_vdpa_add_status(struct vhost_dev *dev, uint8_t status) 257 { 258 uint8_t s; 259 260 trace_vhost_vdpa_add_status(dev, status); 261 if (vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &s)) { 262 return; 263 } 264 265 s |= status; 266 267 vhost_vdpa_call(dev, VHOST_VDPA_SET_STATUS, &s); 268 } 269 270 static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp) 271 { 272 struct vhost_vdpa *v; 273 assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); 274 trace_vhost_vdpa_init(dev, opaque); 275 276 v = opaque; 277 v->dev = dev; 278 dev->opaque = opaque ; 279 v->listener = vhost_vdpa_memory_listener; 280 v->msg_type = VHOST_IOTLB_MSG_V2; 281 282 vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE | 283 VIRTIO_CONFIG_S_DRIVER); 284 285 return 0; 286 } 287 288 static void vhost_vdpa_host_notifier_uninit(struct vhost_dev *dev, 289 int queue_index) 290 { 291 size_t page_size = qemu_real_host_page_size; 292 struct vhost_vdpa *v = dev->opaque; 293 VirtIODevice *vdev = dev->vdev; 294 VhostVDPAHostNotifier *n; 295 296 n = &v->notifier[queue_index]; 297 298 if (n->addr) { 299 virtio_queue_set_host_notifier_mr(vdev, queue_index, &n->mr, false); 300 object_unparent(OBJECT(&n->mr)); 301 munmap(n->addr, page_size); 302 n->addr = NULL; 303 } 304 } 305 306 static void vhost_vdpa_host_notifiers_uninit(struct vhost_dev *dev, int n) 307 { 308 int i; 309 310 for (i = 0; i < n; i++) { 311 vhost_vdpa_host_notifier_uninit(dev, i); 312 } 313 } 314 315 static int vhost_vdpa_host_notifier_init(struct vhost_dev *dev, int queue_index) 316 { 317 size_t page_size = qemu_real_host_page_size; 318 struct vhost_vdpa *v = dev->opaque; 319 VirtIODevice *vdev = dev->vdev; 320 VhostVDPAHostNotifier *n; 321 int fd = v->device_fd; 322 void *addr; 323 char *name; 324 325 vhost_vdpa_host_notifier_uninit(dev, queue_index); 326 327 n = &v->notifier[queue_index]; 328 329 addr = mmap(NULL, page_size, PROT_WRITE, MAP_SHARED, fd, 330 queue_index * page_size); 331 if (addr == MAP_FAILED) { 332 goto err; 333 } 334 335 name = g_strdup_printf("vhost-vdpa/host-notifier@%p mmaps[%d]", 336 v, queue_index); 337 memory_region_init_ram_device_ptr(&n->mr, OBJECT(vdev), name, 338 page_size, addr); 339 g_free(name); 340 341 if (virtio_queue_set_host_notifier_mr(vdev, queue_index, &n->mr, true)) { 342 munmap(addr, page_size); 343 goto err; 344 } 345 n->addr = addr; 346 347 return 0; 348 349 err: 350 return -1; 351 } 352 353 static void vhost_vdpa_host_notifiers_init(struct vhost_dev *dev) 354 { 355 int i; 356 357 for (i = dev->vq_index; i < dev->vq_index + dev->nvqs; i++) { 358 if (vhost_vdpa_host_notifier_init(dev, i)) { 359 goto err; 360 } 361 } 362 363 return; 364 365 err: 366 vhost_vdpa_host_notifiers_uninit(dev, i); 367 return; 368 } 369 370 static int vhost_vdpa_cleanup(struct vhost_dev *dev) 371 { 372 struct vhost_vdpa *v; 373 assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); 374 v = dev->opaque; 375 trace_vhost_vdpa_cleanup(dev, v); 376 vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs); 377 memory_listener_unregister(&v->listener); 378 379 dev->opaque = NULL; 380 return 0; 381 } 382 383 static int vhost_vdpa_memslots_limit(struct vhost_dev *dev) 384 { 385 trace_vhost_vdpa_memslots_limit(dev, INT_MAX); 386 return INT_MAX; 387 } 388 389 static int vhost_vdpa_set_mem_table(struct vhost_dev *dev, 390 struct vhost_memory *mem) 391 { 392 trace_vhost_vdpa_set_mem_table(dev, mem->nregions, mem->padding); 393 if (trace_event_get_state_backends(TRACE_VHOST_VDPA_SET_MEM_TABLE) && 394 trace_event_get_state_backends(TRACE_VHOST_VDPA_DUMP_REGIONS)) { 395 int i; 396 for (i = 0; i < mem->nregions; i++) { 397 trace_vhost_vdpa_dump_regions(dev, i, 398 mem->regions[i].guest_phys_addr, 399 mem->regions[i].memory_size, 400 mem->regions[i].userspace_addr, 401 mem->regions[i].flags_padding); 402 } 403 } 404 if (mem->padding) { 405 return -1; 406 } 407 408 return 0; 409 } 410 411 static int vhost_vdpa_set_features(struct vhost_dev *dev, 412 uint64_t features) 413 { 414 int ret; 415 trace_vhost_vdpa_set_features(dev, features); 416 ret = vhost_vdpa_call(dev, VHOST_SET_FEATURES, &features); 417 uint8_t status = 0; 418 if (ret) { 419 return ret; 420 } 421 vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK); 422 vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &status); 423 424 return !(status & VIRTIO_CONFIG_S_FEATURES_OK); 425 } 426 427 static int vhost_vdpa_set_backend_cap(struct vhost_dev *dev) 428 { 429 uint64_t features; 430 uint64_t f = 0x1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2 | 431 0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH; 432 int r; 433 434 if (vhost_vdpa_call(dev, VHOST_GET_BACKEND_FEATURES, &features)) { 435 return 0; 436 } 437 438 features &= f; 439 r = vhost_vdpa_call(dev, VHOST_SET_BACKEND_FEATURES, &features); 440 if (r) { 441 return 0; 442 } 443 444 dev->backend_cap = features; 445 446 return 0; 447 } 448 449 static int vhost_vdpa_get_device_id(struct vhost_dev *dev, 450 uint32_t *device_id) 451 { 452 int ret; 453 ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_DEVICE_ID, device_id); 454 trace_vhost_vdpa_get_device_id(dev, *device_id); 455 return ret; 456 } 457 458 static int vhost_vdpa_reset_device(struct vhost_dev *dev) 459 { 460 int ret; 461 uint8_t status = 0; 462 463 ret = vhost_vdpa_call(dev, VHOST_VDPA_SET_STATUS, &status); 464 trace_vhost_vdpa_reset_device(dev, status); 465 return ret; 466 } 467 468 static int vhost_vdpa_get_vq_index(struct vhost_dev *dev, int idx) 469 { 470 assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); 471 472 trace_vhost_vdpa_get_vq_index(dev, idx, idx - dev->vq_index); 473 return idx - dev->vq_index; 474 } 475 476 static int vhost_vdpa_set_vring_ready(struct vhost_dev *dev) 477 { 478 int i; 479 trace_vhost_vdpa_set_vring_ready(dev); 480 for (i = 0; i < dev->nvqs; ++i) { 481 struct vhost_vring_state state = { 482 .index = dev->vq_index + i, 483 .num = 1, 484 }; 485 vhost_vdpa_call(dev, VHOST_VDPA_SET_VRING_ENABLE, &state); 486 } 487 return 0; 488 } 489 490 static void vhost_vdpa_dump_config(struct vhost_dev *dev, const uint8_t *config, 491 uint32_t config_len) 492 { 493 int b, len; 494 char line[QEMU_HEXDUMP_LINE_LEN]; 495 496 for (b = 0; b < config_len; b += 16) { 497 len = config_len - b; 498 qemu_hexdump_line(line, b, config, len, false); 499 trace_vhost_vdpa_dump_config(dev, line); 500 } 501 } 502 503 static int vhost_vdpa_set_config(struct vhost_dev *dev, const uint8_t *data, 504 uint32_t offset, uint32_t size, 505 uint32_t flags) 506 { 507 struct vhost_vdpa_config *config; 508 int ret; 509 unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); 510 511 trace_vhost_vdpa_set_config(dev, offset, size, flags); 512 config = g_malloc(size + config_size); 513 config->off = offset; 514 config->len = size; 515 memcpy(config->buf, data, size); 516 if (trace_event_get_state_backends(TRACE_VHOST_VDPA_SET_CONFIG) && 517 trace_event_get_state_backends(TRACE_VHOST_VDPA_DUMP_CONFIG)) { 518 vhost_vdpa_dump_config(dev, data, size); 519 } 520 ret = vhost_vdpa_call(dev, VHOST_VDPA_SET_CONFIG, config); 521 g_free(config); 522 return ret; 523 } 524 525 static int vhost_vdpa_get_config(struct vhost_dev *dev, uint8_t *config, 526 uint32_t config_len, Error **errp) 527 { 528 struct vhost_vdpa_config *v_config; 529 unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); 530 int ret; 531 532 trace_vhost_vdpa_get_config(dev, config, config_len); 533 v_config = g_malloc(config_len + config_size); 534 v_config->len = config_len; 535 v_config->off = 0; 536 ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_CONFIG, v_config); 537 memcpy(config, v_config->buf, config_len); 538 g_free(v_config); 539 if (trace_event_get_state_backends(TRACE_VHOST_VDPA_GET_CONFIG) && 540 trace_event_get_state_backends(TRACE_VHOST_VDPA_DUMP_CONFIG)) { 541 vhost_vdpa_dump_config(dev, config, config_len); 542 } 543 return ret; 544 } 545 546 static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started) 547 { 548 struct vhost_vdpa *v = dev->opaque; 549 trace_vhost_vdpa_dev_start(dev, started); 550 if (started) { 551 uint8_t status = 0; 552 memory_listener_register(&v->listener, &address_space_memory); 553 vhost_vdpa_host_notifiers_init(dev); 554 vhost_vdpa_set_vring_ready(dev); 555 vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK); 556 vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &status); 557 558 return !(status & VIRTIO_CONFIG_S_DRIVER_OK); 559 } else { 560 vhost_vdpa_reset_device(dev); 561 vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE | 562 VIRTIO_CONFIG_S_DRIVER); 563 vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs); 564 memory_listener_unregister(&v->listener); 565 566 return 0; 567 } 568 } 569 570 static int vhost_vdpa_set_log_base(struct vhost_dev *dev, uint64_t base, 571 struct vhost_log *log) 572 { 573 trace_vhost_vdpa_set_log_base(dev, base, log->size, log->refcnt, log->fd, 574 log->log); 575 return vhost_vdpa_call(dev, VHOST_SET_LOG_BASE, &base); 576 } 577 578 static int vhost_vdpa_set_vring_addr(struct vhost_dev *dev, 579 struct vhost_vring_addr *addr) 580 { 581 trace_vhost_vdpa_set_vring_addr(dev, addr->index, addr->flags, 582 addr->desc_user_addr, addr->used_user_addr, 583 addr->avail_user_addr, 584 addr->log_guest_addr); 585 return vhost_vdpa_call(dev, VHOST_SET_VRING_ADDR, addr); 586 } 587 588 static int vhost_vdpa_set_vring_num(struct vhost_dev *dev, 589 struct vhost_vring_state *ring) 590 { 591 trace_vhost_vdpa_set_vring_num(dev, ring->index, ring->num); 592 return vhost_vdpa_call(dev, VHOST_SET_VRING_NUM, ring); 593 } 594 595 static int vhost_vdpa_set_vring_base(struct vhost_dev *dev, 596 struct vhost_vring_state *ring) 597 { 598 trace_vhost_vdpa_set_vring_base(dev, ring->index, ring->num); 599 return vhost_vdpa_call(dev, VHOST_SET_VRING_BASE, ring); 600 } 601 602 static int vhost_vdpa_get_vring_base(struct vhost_dev *dev, 603 struct vhost_vring_state *ring) 604 { 605 int ret; 606 607 ret = vhost_vdpa_call(dev, VHOST_GET_VRING_BASE, ring); 608 trace_vhost_vdpa_get_vring_base(dev, ring->index, ring->num); 609 return ret; 610 } 611 612 static int vhost_vdpa_set_vring_kick(struct vhost_dev *dev, 613 struct vhost_vring_file *file) 614 { 615 trace_vhost_vdpa_set_vring_kick(dev, file->index, file->fd); 616 return vhost_vdpa_call(dev, VHOST_SET_VRING_KICK, file); 617 } 618 619 static int vhost_vdpa_set_vring_call(struct vhost_dev *dev, 620 struct vhost_vring_file *file) 621 { 622 trace_vhost_vdpa_set_vring_call(dev, file->index, file->fd); 623 return vhost_vdpa_call(dev, VHOST_SET_VRING_CALL, file); 624 } 625 626 static int vhost_vdpa_get_features(struct vhost_dev *dev, 627 uint64_t *features) 628 { 629 int ret; 630 631 ret = vhost_vdpa_call(dev, VHOST_GET_FEATURES, features); 632 trace_vhost_vdpa_get_features(dev, *features); 633 return ret; 634 } 635 636 static int vhost_vdpa_set_owner(struct vhost_dev *dev) 637 { 638 trace_vhost_vdpa_set_owner(dev); 639 return vhost_vdpa_call(dev, VHOST_SET_OWNER, NULL); 640 } 641 642 static int vhost_vdpa_vq_get_addr(struct vhost_dev *dev, 643 struct vhost_vring_addr *addr, struct vhost_virtqueue *vq) 644 { 645 assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); 646 addr->desc_user_addr = (uint64_t)(unsigned long)vq->desc_phys; 647 addr->avail_user_addr = (uint64_t)(unsigned long)vq->avail_phys; 648 addr->used_user_addr = (uint64_t)(unsigned long)vq->used_phys; 649 trace_vhost_vdpa_vq_get_addr(dev, vq, addr->desc_user_addr, 650 addr->avail_user_addr, addr->used_user_addr); 651 return 0; 652 } 653 654 static bool vhost_vdpa_force_iommu(struct vhost_dev *dev) 655 { 656 return true; 657 } 658 659 const VhostOps vdpa_ops = { 660 .backend_type = VHOST_BACKEND_TYPE_VDPA, 661 .vhost_backend_init = vhost_vdpa_init, 662 .vhost_backend_cleanup = vhost_vdpa_cleanup, 663 .vhost_set_log_base = vhost_vdpa_set_log_base, 664 .vhost_set_vring_addr = vhost_vdpa_set_vring_addr, 665 .vhost_set_vring_num = vhost_vdpa_set_vring_num, 666 .vhost_set_vring_base = vhost_vdpa_set_vring_base, 667 .vhost_get_vring_base = vhost_vdpa_get_vring_base, 668 .vhost_set_vring_kick = vhost_vdpa_set_vring_kick, 669 .vhost_set_vring_call = vhost_vdpa_set_vring_call, 670 .vhost_get_features = vhost_vdpa_get_features, 671 .vhost_set_backend_cap = vhost_vdpa_set_backend_cap, 672 .vhost_set_owner = vhost_vdpa_set_owner, 673 .vhost_set_vring_endian = NULL, 674 .vhost_backend_memslots_limit = vhost_vdpa_memslots_limit, 675 .vhost_set_mem_table = vhost_vdpa_set_mem_table, 676 .vhost_set_features = vhost_vdpa_set_features, 677 .vhost_reset_device = vhost_vdpa_reset_device, 678 .vhost_get_vq_index = vhost_vdpa_get_vq_index, 679 .vhost_get_config = vhost_vdpa_get_config, 680 .vhost_set_config = vhost_vdpa_set_config, 681 .vhost_requires_shm_log = NULL, 682 .vhost_migration_done = NULL, 683 .vhost_backend_can_merge = NULL, 684 .vhost_net_set_mtu = NULL, 685 .vhost_set_iotlb_callback = NULL, 686 .vhost_send_device_iotlb_msg = NULL, 687 .vhost_dev_start = vhost_vdpa_dev_start, 688 .vhost_get_device_id = vhost_vdpa_get_device_id, 689 .vhost_vq_get_addr = vhost_vdpa_vq_get_addr, 690 .vhost_force_iommu = vhost_vdpa_force_iommu, 691 }; 692