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 /* 28 * Return one past the end of the end of section. Be careful with uint64_t 29 * conversions! 30 */ 31 static Int128 vhost_vdpa_section_end(const MemoryRegionSection *section) 32 { 33 Int128 llend = int128_make64(section->offset_within_address_space); 34 llend = int128_add(llend, section->size); 35 llend = int128_and(llend, int128_exts64(TARGET_PAGE_MASK)); 36 37 return llend; 38 } 39 40 static bool vhost_vdpa_listener_skipped_section(MemoryRegionSection *section, 41 uint64_t iova_min, 42 uint64_t iova_max) 43 { 44 Int128 llend; 45 46 if ((!memory_region_is_ram(section->mr) && 47 !memory_region_is_iommu(section->mr)) || 48 memory_region_is_protected(section->mr) || 49 /* vhost-vDPA doesn't allow MMIO to be mapped */ 50 memory_region_is_ram_device(section->mr)) { 51 return true; 52 } 53 54 if (section->offset_within_address_space < iova_min) { 55 error_report("RAM section out of device range (min=0x%" PRIx64 56 ", addr=0x%" HWADDR_PRIx ")", 57 iova_min, section->offset_within_address_space); 58 return true; 59 } 60 61 llend = vhost_vdpa_section_end(section); 62 if (int128_gt(llend, int128_make64(iova_max))) { 63 error_report("RAM section out of device range (max=0x%" PRIx64 64 ", end addr=0x%" PRIx64 ")", 65 iova_max, int128_get64(llend)); 66 return true; 67 } 68 69 return false; 70 } 71 72 static int vhost_vdpa_dma_map(struct vhost_vdpa *v, hwaddr iova, hwaddr size, 73 void *vaddr, bool readonly) 74 { 75 struct vhost_msg_v2 msg = {}; 76 int fd = v->device_fd; 77 int ret = 0; 78 79 msg.type = v->msg_type; 80 msg.iotlb.iova = iova; 81 msg.iotlb.size = size; 82 msg.iotlb.uaddr = (uint64_t)(uintptr_t)vaddr; 83 msg.iotlb.perm = readonly ? VHOST_ACCESS_RO : VHOST_ACCESS_RW; 84 msg.iotlb.type = VHOST_IOTLB_UPDATE; 85 86 trace_vhost_vdpa_dma_map(v, fd, msg.type, msg.iotlb.iova, msg.iotlb.size, 87 msg.iotlb.uaddr, msg.iotlb.perm, msg.iotlb.type); 88 89 if (write(fd, &msg, sizeof(msg)) != sizeof(msg)) { 90 error_report("failed to write, fd=%d, errno=%d (%s)", 91 fd, errno, strerror(errno)); 92 return -EIO ; 93 } 94 95 return ret; 96 } 97 98 static int vhost_vdpa_dma_unmap(struct vhost_vdpa *v, hwaddr iova, 99 hwaddr size) 100 { 101 struct vhost_msg_v2 msg = {}; 102 int fd = v->device_fd; 103 int ret = 0; 104 105 msg.type = v->msg_type; 106 msg.iotlb.iova = iova; 107 msg.iotlb.size = size; 108 msg.iotlb.type = VHOST_IOTLB_INVALIDATE; 109 110 trace_vhost_vdpa_dma_unmap(v, fd, msg.type, msg.iotlb.iova, 111 msg.iotlb.size, msg.iotlb.type); 112 113 if (write(fd, &msg, sizeof(msg)) != sizeof(msg)) { 114 error_report("failed to write, fd=%d, errno=%d (%s)", 115 fd, errno, strerror(errno)); 116 return -EIO ; 117 } 118 119 return ret; 120 } 121 122 static void vhost_vdpa_listener_begin_batch(struct vhost_vdpa *v) 123 { 124 int fd = v->device_fd; 125 struct vhost_msg_v2 msg = { 126 .type = v->msg_type, 127 .iotlb.type = VHOST_IOTLB_BATCH_BEGIN, 128 }; 129 130 if (write(fd, &msg, sizeof(msg)) != sizeof(msg)) { 131 error_report("failed to write, fd=%d, errno=%d (%s)", 132 fd, errno, strerror(errno)); 133 } 134 } 135 136 static void vhost_vdpa_iotlb_batch_begin_once(struct vhost_vdpa *v) 137 { 138 if (v->dev->backend_cap & (0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH) && 139 !v->iotlb_batch_begin_sent) { 140 vhost_vdpa_listener_begin_batch(v); 141 } 142 143 v->iotlb_batch_begin_sent = true; 144 } 145 146 static void vhost_vdpa_listener_commit(MemoryListener *listener) 147 { 148 struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener); 149 struct vhost_dev *dev = v->dev; 150 struct vhost_msg_v2 msg = {}; 151 int fd = v->device_fd; 152 153 if (!(dev->backend_cap & (0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH))) { 154 return; 155 } 156 157 if (!v->iotlb_batch_begin_sent) { 158 return; 159 } 160 161 msg.type = v->msg_type; 162 msg.iotlb.type = VHOST_IOTLB_BATCH_END; 163 164 if (write(fd, &msg, sizeof(msg)) != sizeof(msg)) { 165 error_report("failed to write, fd=%d, errno=%d (%s)", 166 fd, errno, strerror(errno)); 167 } 168 169 v->iotlb_batch_begin_sent = false; 170 } 171 172 static void vhost_vdpa_listener_region_add(MemoryListener *listener, 173 MemoryRegionSection *section) 174 { 175 struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener); 176 hwaddr iova; 177 Int128 llend, llsize; 178 void *vaddr; 179 int ret; 180 181 if (vhost_vdpa_listener_skipped_section(section, v->iova_range.first, 182 v->iova_range.last)) { 183 return; 184 } 185 186 if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) != 187 (section->offset_within_region & ~TARGET_PAGE_MASK))) { 188 error_report("%s received unaligned region", __func__); 189 return; 190 } 191 192 iova = TARGET_PAGE_ALIGN(section->offset_within_address_space); 193 llend = vhost_vdpa_section_end(section); 194 if (int128_ge(int128_make64(iova), llend)) { 195 return; 196 } 197 198 memory_region_ref(section->mr); 199 200 /* Here we assume that memory_region_is_ram(section->mr)==true */ 201 202 vaddr = memory_region_get_ram_ptr(section->mr) + 203 section->offset_within_region + 204 (iova - section->offset_within_address_space); 205 206 trace_vhost_vdpa_listener_region_add(v, iova, int128_get64(llend), 207 vaddr, section->readonly); 208 209 llsize = int128_sub(llend, int128_make64(iova)); 210 211 vhost_vdpa_iotlb_batch_begin_once(v); 212 ret = vhost_vdpa_dma_map(v, iova, int128_get64(llsize), 213 vaddr, section->readonly); 214 if (ret) { 215 error_report("vhost vdpa map fail!"); 216 goto fail; 217 } 218 219 return; 220 221 fail: 222 /* 223 * On the initfn path, store the first error in the container so we 224 * can gracefully fail. Runtime, there's not much we can do other 225 * than throw a hardware error. 226 */ 227 error_report("vhost-vdpa: DMA mapping failed, unable to continue"); 228 return; 229 230 } 231 232 static void vhost_vdpa_listener_region_del(MemoryListener *listener, 233 MemoryRegionSection *section) 234 { 235 struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener); 236 hwaddr iova; 237 Int128 llend, llsize; 238 int ret; 239 240 if (vhost_vdpa_listener_skipped_section(section, v->iova_range.first, 241 v->iova_range.last)) { 242 return; 243 } 244 245 if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) != 246 (section->offset_within_region & ~TARGET_PAGE_MASK))) { 247 error_report("%s received unaligned region", __func__); 248 return; 249 } 250 251 iova = TARGET_PAGE_ALIGN(section->offset_within_address_space); 252 llend = vhost_vdpa_section_end(section); 253 254 trace_vhost_vdpa_listener_region_del(v, iova, int128_get64(llend)); 255 256 if (int128_ge(int128_make64(iova), llend)) { 257 return; 258 } 259 260 llsize = int128_sub(llend, int128_make64(iova)); 261 262 vhost_vdpa_iotlb_batch_begin_once(v); 263 ret = vhost_vdpa_dma_unmap(v, iova, int128_get64(llsize)); 264 if (ret) { 265 error_report("vhost_vdpa dma unmap error!"); 266 } 267 268 memory_region_unref(section->mr); 269 } 270 /* 271 * IOTLB API is used by vhost-vpda which requires incremental updating 272 * of the mapping. So we can not use generic vhost memory listener which 273 * depends on the addnop(). 274 */ 275 static const MemoryListener vhost_vdpa_memory_listener = { 276 .name = "vhost-vdpa", 277 .commit = vhost_vdpa_listener_commit, 278 .region_add = vhost_vdpa_listener_region_add, 279 .region_del = vhost_vdpa_listener_region_del, 280 }; 281 282 static int vhost_vdpa_call(struct vhost_dev *dev, unsigned long int request, 283 void *arg) 284 { 285 struct vhost_vdpa *v = dev->opaque; 286 int fd = v->device_fd; 287 int ret; 288 289 assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); 290 291 ret = ioctl(fd, request, arg); 292 return ret < 0 ? -errno : ret; 293 } 294 295 static int vhost_vdpa_add_status(struct vhost_dev *dev, uint8_t status) 296 { 297 uint8_t s; 298 int ret; 299 300 trace_vhost_vdpa_add_status(dev, status); 301 ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &s); 302 if (ret < 0) { 303 return ret; 304 } 305 306 s |= status; 307 308 ret = vhost_vdpa_call(dev, VHOST_VDPA_SET_STATUS, &s); 309 if (ret < 0) { 310 return ret; 311 } 312 313 ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &s); 314 if (ret < 0) { 315 return ret; 316 } 317 318 if (!(s & status)) { 319 return -EIO; 320 } 321 322 return 0; 323 } 324 325 static void vhost_vdpa_get_iova_range(struct vhost_vdpa *v) 326 { 327 int ret = vhost_vdpa_call(v->dev, VHOST_VDPA_GET_IOVA_RANGE, 328 &v->iova_range); 329 if (ret != 0) { 330 v->iova_range.first = 0; 331 v->iova_range.last = UINT64_MAX; 332 } 333 334 trace_vhost_vdpa_get_iova_range(v->dev, v->iova_range.first, 335 v->iova_range.last); 336 } 337 338 static bool vhost_vdpa_one_time_request(struct vhost_dev *dev) 339 { 340 struct vhost_vdpa *v = dev->opaque; 341 342 return v->index != 0; 343 } 344 345 static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp) 346 { 347 struct vhost_vdpa *v; 348 assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); 349 trace_vhost_vdpa_init(dev, opaque); 350 int ret; 351 352 /* 353 * Similar to VFIO, we end up pinning all guest memory and have to 354 * disable discarding of RAM. 355 */ 356 ret = ram_block_discard_disable(true); 357 if (ret) { 358 error_report("Cannot set discarding of RAM broken"); 359 return ret; 360 } 361 362 v = opaque; 363 v->dev = dev; 364 dev->opaque = opaque ; 365 v->listener = vhost_vdpa_memory_listener; 366 v->msg_type = VHOST_IOTLB_MSG_V2; 367 368 vhost_vdpa_get_iova_range(v); 369 370 if (vhost_vdpa_one_time_request(dev)) { 371 return 0; 372 } 373 374 vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE | 375 VIRTIO_CONFIG_S_DRIVER); 376 377 return 0; 378 } 379 380 static void vhost_vdpa_host_notifier_uninit(struct vhost_dev *dev, 381 int queue_index) 382 { 383 size_t page_size = qemu_real_host_page_size; 384 struct vhost_vdpa *v = dev->opaque; 385 VirtIODevice *vdev = dev->vdev; 386 VhostVDPAHostNotifier *n; 387 388 n = &v->notifier[queue_index]; 389 390 if (n->addr) { 391 virtio_queue_set_host_notifier_mr(vdev, queue_index, &n->mr, false); 392 object_unparent(OBJECT(&n->mr)); 393 munmap(n->addr, page_size); 394 n->addr = NULL; 395 } 396 } 397 398 static void vhost_vdpa_host_notifiers_uninit(struct vhost_dev *dev, int n) 399 { 400 int i; 401 402 for (i = 0; i < n; i++) { 403 vhost_vdpa_host_notifier_uninit(dev, i); 404 } 405 } 406 407 static int vhost_vdpa_host_notifier_init(struct vhost_dev *dev, int queue_index) 408 { 409 size_t page_size = qemu_real_host_page_size; 410 struct vhost_vdpa *v = dev->opaque; 411 VirtIODevice *vdev = dev->vdev; 412 VhostVDPAHostNotifier *n; 413 int fd = v->device_fd; 414 void *addr; 415 char *name; 416 417 vhost_vdpa_host_notifier_uninit(dev, queue_index); 418 419 n = &v->notifier[queue_index]; 420 421 addr = mmap(NULL, page_size, PROT_WRITE, MAP_SHARED, fd, 422 queue_index * page_size); 423 if (addr == MAP_FAILED) { 424 goto err; 425 } 426 427 name = g_strdup_printf("vhost-vdpa/host-notifier@%p mmaps[%d]", 428 v, queue_index); 429 memory_region_init_ram_device_ptr(&n->mr, OBJECT(vdev), name, 430 page_size, addr); 431 g_free(name); 432 433 if (virtio_queue_set_host_notifier_mr(vdev, queue_index, &n->mr, true)) { 434 munmap(addr, page_size); 435 goto err; 436 } 437 n->addr = addr; 438 439 return 0; 440 441 err: 442 return -1; 443 } 444 445 static void vhost_vdpa_host_notifiers_init(struct vhost_dev *dev) 446 { 447 int i; 448 449 for (i = dev->vq_index; i < dev->vq_index + dev->nvqs; i++) { 450 if (vhost_vdpa_host_notifier_init(dev, i)) { 451 goto err; 452 } 453 } 454 455 return; 456 457 err: 458 vhost_vdpa_host_notifiers_uninit(dev, i); 459 return; 460 } 461 462 static int vhost_vdpa_cleanup(struct vhost_dev *dev) 463 { 464 struct vhost_vdpa *v; 465 assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); 466 v = dev->opaque; 467 trace_vhost_vdpa_cleanup(dev, v); 468 vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs); 469 memory_listener_unregister(&v->listener); 470 471 dev->opaque = NULL; 472 ram_block_discard_disable(false); 473 474 return 0; 475 } 476 477 static int vhost_vdpa_memslots_limit(struct vhost_dev *dev) 478 { 479 trace_vhost_vdpa_memslots_limit(dev, INT_MAX); 480 return INT_MAX; 481 } 482 483 static int vhost_vdpa_set_mem_table(struct vhost_dev *dev, 484 struct vhost_memory *mem) 485 { 486 if (vhost_vdpa_one_time_request(dev)) { 487 return 0; 488 } 489 490 trace_vhost_vdpa_set_mem_table(dev, mem->nregions, mem->padding); 491 if (trace_event_get_state_backends(TRACE_VHOST_VDPA_SET_MEM_TABLE) && 492 trace_event_get_state_backends(TRACE_VHOST_VDPA_DUMP_REGIONS)) { 493 int i; 494 for (i = 0; i < mem->nregions; i++) { 495 trace_vhost_vdpa_dump_regions(dev, i, 496 mem->regions[i].guest_phys_addr, 497 mem->regions[i].memory_size, 498 mem->regions[i].userspace_addr, 499 mem->regions[i].flags_padding); 500 } 501 } 502 if (mem->padding) { 503 return -EINVAL; 504 } 505 506 return 0; 507 } 508 509 static int vhost_vdpa_set_features(struct vhost_dev *dev, 510 uint64_t features) 511 { 512 int ret; 513 514 if (vhost_vdpa_one_time_request(dev)) { 515 return 0; 516 } 517 518 trace_vhost_vdpa_set_features(dev, features); 519 ret = vhost_vdpa_call(dev, VHOST_SET_FEATURES, &features); 520 if (ret) { 521 return ret; 522 } 523 524 return vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK); 525 } 526 527 static int vhost_vdpa_set_backend_cap(struct vhost_dev *dev) 528 { 529 uint64_t features; 530 uint64_t f = 0x1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2 | 531 0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH; 532 int r; 533 534 if (vhost_vdpa_call(dev, VHOST_GET_BACKEND_FEATURES, &features)) { 535 return -EFAULT; 536 } 537 538 features &= f; 539 540 if (vhost_vdpa_one_time_request(dev)) { 541 r = vhost_vdpa_call(dev, VHOST_SET_BACKEND_FEATURES, &features); 542 if (r) { 543 return -EFAULT; 544 } 545 } 546 547 dev->backend_cap = features; 548 549 return 0; 550 } 551 552 static int vhost_vdpa_get_device_id(struct vhost_dev *dev, 553 uint32_t *device_id) 554 { 555 int ret; 556 ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_DEVICE_ID, device_id); 557 trace_vhost_vdpa_get_device_id(dev, *device_id); 558 return ret; 559 } 560 561 static int vhost_vdpa_reset_device(struct vhost_dev *dev) 562 { 563 int ret; 564 uint8_t status = 0; 565 566 ret = vhost_vdpa_call(dev, VHOST_VDPA_SET_STATUS, &status); 567 trace_vhost_vdpa_reset_device(dev, status); 568 return ret; 569 } 570 571 static int vhost_vdpa_get_vq_index(struct vhost_dev *dev, int idx) 572 { 573 assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); 574 575 trace_vhost_vdpa_get_vq_index(dev, idx, idx); 576 return idx; 577 } 578 579 static int vhost_vdpa_set_vring_ready(struct vhost_dev *dev) 580 { 581 int i; 582 trace_vhost_vdpa_set_vring_ready(dev); 583 for (i = 0; i < dev->nvqs; ++i) { 584 struct vhost_vring_state state = { 585 .index = dev->vq_index + i, 586 .num = 1, 587 }; 588 vhost_vdpa_call(dev, VHOST_VDPA_SET_VRING_ENABLE, &state); 589 } 590 return 0; 591 } 592 593 static void vhost_vdpa_dump_config(struct vhost_dev *dev, const uint8_t *config, 594 uint32_t config_len) 595 { 596 int b, len; 597 char line[QEMU_HEXDUMP_LINE_LEN]; 598 599 for (b = 0; b < config_len; b += 16) { 600 len = config_len - b; 601 qemu_hexdump_line(line, b, config, len, false); 602 trace_vhost_vdpa_dump_config(dev, line); 603 } 604 } 605 606 static int vhost_vdpa_set_config(struct vhost_dev *dev, const uint8_t *data, 607 uint32_t offset, uint32_t size, 608 uint32_t flags) 609 { 610 struct vhost_vdpa_config *config; 611 int ret; 612 unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); 613 614 trace_vhost_vdpa_set_config(dev, offset, size, flags); 615 config = g_malloc(size + config_size); 616 config->off = offset; 617 config->len = size; 618 memcpy(config->buf, data, size); 619 if (trace_event_get_state_backends(TRACE_VHOST_VDPA_SET_CONFIG) && 620 trace_event_get_state_backends(TRACE_VHOST_VDPA_DUMP_CONFIG)) { 621 vhost_vdpa_dump_config(dev, data, size); 622 } 623 ret = vhost_vdpa_call(dev, VHOST_VDPA_SET_CONFIG, config); 624 g_free(config); 625 return ret; 626 } 627 628 static int vhost_vdpa_get_config(struct vhost_dev *dev, uint8_t *config, 629 uint32_t config_len, Error **errp) 630 { 631 struct vhost_vdpa_config *v_config; 632 unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); 633 int ret; 634 635 trace_vhost_vdpa_get_config(dev, config, config_len); 636 v_config = g_malloc(config_len + config_size); 637 v_config->len = config_len; 638 v_config->off = 0; 639 ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_CONFIG, v_config); 640 memcpy(config, v_config->buf, config_len); 641 g_free(v_config); 642 if (trace_event_get_state_backends(TRACE_VHOST_VDPA_GET_CONFIG) && 643 trace_event_get_state_backends(TRACE_VHOST_VDPA_DUMP_CONFIG)) { 644 vhost_vdpa_dump_config(dev, config, config_len); 645 } 646 return ret; 647 } 648 649 static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started) 650 { 651 struct vhost_vdpa *v = dev->opaque; 652 trace_vhost_vdpa_dev_start(dev, started); 653 654 if (started) { 655 vhost_vdpa_host_notifiers_init(dev); 656 vhost_vdpa_set_vring_ready(dev); 657 } else { 658 vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs); 659 } 660 661 if (dev->vq_index + dev->nvqs != dev->vq_index_end) { 662 return 0; 663 } 664 665 if (started) { 666 memory_listener_register(&v->listener, &address_space_memory); 667 return vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK); 668 } else { 669 vhost_vdpa_reset_device(dev); 670 vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE | 671 VIRTIO_CONFIG_S_DRIVER); 672 memory_listener_unregister(&v->listener); 673 674 return 0; 675 } 676 } 677 678 static int vhost_vdpa_set_log_base(struct vhost_dev *dev, uint64_t base, 679 struct vhost_log *log) 680 { 681 if (vhost_vdpa_one_time_request(dev)) { 682 return 0; 683 } 684 685 trace_vhost_vdpa_set_log_base(dev, base, log->size, log->refcnt, log->fd, 686 log->log); 687 return vhost_vdpa_call(dev, VHOST_SET_LOG_BASE, &base); 688 } 689 690 static int vhost_vdpa_set_vring_addr(struct vhost_dev *dev, 691 struct vhost_vring_addr *addr) 692 { 693 trace_vhost_vdpa_set_vring_addr(dev, addr->index, addr->flags, 694 addr->desc_user_addr, addr->used_user_addr, 695 addr->avail_user_addr, 696 addr->log_guest_addr); 697 return vhost_vdpa_call(dev, VHOST_SET_VRING_ADDR, addr); 698 } 699 700 static int vhost_vdpa_set_vring_num(struct vhost_dev *dev, 701 struct vhost_vring_state *ring) 702 { 703 trace_vhost_vdpa_set_vring_num(dev, ring->index, ring->num); 704 return vhost_vdpa_call(dev, VHOST_SET_VRING_NUM, ring); 705 } 706 707 static int vhost_vdpa_set_vring_base(struct vhost_dev *dev, 708 struct vhost_vring_state *ring) 709 { 710 trace_vhost_vdpa_set_vring_base(dev, ring->index, ring->num); 711 return vhost_vdpa_call(dev, VHOST_SET_VRING_BASE, ring); 712 } 713 714 static int vhost_vdpa_get_vring_base(struct vhost_dev *dev, 715 struct vhost_vring_state *ring) 716 { 717 int ret; 718 719 ret = vhost_vdpa_call(dev, VHOST_GET_VRING_BASE, ring); 720 trace_vhost_vdpa_get_vring_base(dev, ring->index, ring->num); 721 return ret; 722 } 723 724 static int vhost_vdpa_set_vring_kick(struct vhost_dev *dev, 725 struct vhost_vring_file *file) 726 { 727 trace_vhost_vdpa_set_vring_kick(dev, file->index, file->fd); 728 return vhost_vdpa_call(dev, VHOST_SET_VRING_KICK, file); 729 } 730 731 static int vhost_vdpa_set_vring_call(struct vhost_dev *dev, 732 struct vhost_vring_file *file) 733 { 734 trace_vhost_vdpa_set_vring_call(dev, file->index, file->fd); 735 return vhost_vdpa_call(dev, VHOST_SET_VRING_CALL, file); 736 } 737 738 static int vhost_vdpa_get_features(struct vhost_dev *dev, 739 uint64_t *features) 740 { 741 int ret; 742 743 ret = vhost_vdpa_call(dev, VHOST_GET_FEATURES, features); 744 trace_vhost_vdpa_get_features(dev, *features); 745 return ret; 746 } 747 748 static int vhost_vdpa_set_owner(struct vhost_dev *dev) 749 { 750 if (vhost_vdpa_one_time_request(dev)) { 751 return 0; 752 } 753 754 trace_vhost_vdpa_set_owner(dev); 755 return vhost_vdpa_call(dev, VHOST_SET_OWNER, NULL); 756 } 757 758 static int vhost_vdpa_vq_get_addr(struct vhost_dev *dev, 759 struct vhost_vring_addr *addr, struct vhost_virtqueue *vq) 760 { 761 assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); 762 addr->desc_user_addr = (uint64_t)(unsigned long)vq->desc_phys; 763 addr->avail_user_addr = (uint64_t)(unsigned long)vq->avail_phys; 764 addr->used_user_addr = (uint64_t)(unsigned long)vq->used_phys; 765 trace_vhost_vdpa_vq_get_addr(dev, vq, addr->desc_user_addr, 766 addr->avail_user_addr, addr->used_user_addr); 767 return 0; 768 } 769 770 static bool vhost_vdpa_force_iommu(struct vhost_dev *dev) 771 { 772 return true; 773 } 774 775 const VhostOps vdpa_ops = { 776 .backend_type = VHOST_BACKEND_TYPE_VDPA, 777 .vhost_backend_init = vhost_vdpa_init, 778 .vhost_backend_cleanup = vhost_vdpa_cleanup, 779 .vhost_set_log_base = vhost_vdpa_set_log_base, 780 .vhost_set_vring_addr = vhost_vdpa_set_vring_addr, 781 .vhost_set_vring_num = vhost_vdpa_set_vring_num, 782 .vhost_set_vring_base = vhost_vdpa_set_vring_base, 783 .vhost_get_vring_base = vhost_vdpa_get_vring_base, 784 .vhost_set_vring_kick = vhost_vdpa_set_vring_kick, 785 .vhost_set_vring_call = vhost_vdpa_set_vring_call, 786 .vhost_get_features = vhost_vdpa_get_features, 787 .vhost_set_backend_cap = vhost_vdpa_set_backend_cap, 788 .vhost_set_owner = vhost_vdpa_set_owner, 789 .vhost_set_vring_endian = NULL, 790 .vhost_backend_memslots_limit = vhost_vdpa_memslots_limit, 791 .vhost_set_mem_table = vhost_vdpa_set_mem_table, 792 .vhost_set_features = vhost_vdpa_set_features, 793 .vhost_reset_device = vhost_vdpa_reset_device, 794 .vhost_get_vq_index = vhost_vdpa_get_vq_index, 795 .vhost_get_config = vhost_vdpa_get_config, 796 .vhost_set_config = vhost_vdpa_set_config, 797 .vhost_requires_shm_log = NULL, 798 .vhost_migration_done = NULL, 799 .vhost_backend_can_merge = NULL, 800 .vhost_net_set_mtu = NULL, 801 .vhost_set_iotlb_callback = NULL, 802 .vhost_send_device_iotlb_msg = NULL, 803 .vhost_dev_start = vhost_vdpa_dev_start, 804 .vhost_get_device_id = vhost_vdpa_get_device_id, 805 .vhost_vq_get_addr = vhost_vdpa_vq_get_addr, 806 .vhost_force_iommu = vhost_vdpa_force_iommu, 807 }; 808