| 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 "exec/target_page.h" |
| 18 | #include "hw/virtio/vhost.h" |
| 19 | #include "hw/virtio/vhost-backend.h" |
| 20 | #include "hw/virtio/virtio-net.h" |
| 21 | #include "hw/virtio/vhost-shadow-virtqueue.h" |
| 22 | #include "hw/virtio/vhost-vdpa.h" |
| 23 | #include "system/address-spaces.h" |
| 24 | #include "migration/blocker.h" |
| 25 | #include "qemu/cutils.h" |
| 26 | #include "qemu/main-loop.h" |
| 27 | #include "trace.h" |
| 28 | #include "qapi/error.h" |
| 29 | |
| 30 | /* |
| 31 | * Return one past the end of the end of section. Be careful with uint64_t |
| 32 | * conversions! |
| 33 | */ |
| 34 | static Int128 vhost_vdpa_section_end(const MemoryRegionSection *section, |
| 35 | int page_mask) |
| 36 | { |
| 37 | Int128 llend = int128_make64(section->offset_within_address_space); |
| 38 | llend = int128_add(llend, section->size); |
| 39 | llend = int128_and(llend, int128_exts64(page_mask)); |
| 40 | |
| 41 | return llend; |
| 42 | } |
| 43 | |
| 44 | static bool vhost_vdpa_listener_skipped_section(MemoryRegionSection *section, |
| 45 | uint64_t iova_min, |
| 46 | uint64_t iova_max, |
| 47 | int page_mask) |
| 48 | { |
| 49 | Int128 llend; |
| 50 | bool is_ram = memory_region_is_ram(section->mr); |
| 51 | bool is_iommu = memory_region_is_iommu(section->mr); |
| 52 | bool is_protected = memory_region_is_protected(section->mr); |
| 53 | |
| 54 | /* vhost-vDPA doesn't allow MMIO to be mapped */ |
| 55 | bool is_ram_device = memory_region_is_ram_device(section->mr); |
| 56 | |
| 57 | if ((!is_ram && !is_iommu) || is_protected || is_ram_device) { |
| 58 | trace_vhost_vdpa_skipped_memory_section(is_ram, is_iommu, is_protected, |
| 59 | is_ram_device, iova_min, |
| 60 | iova_max, page_mask); |
| 61 | return true; |
| 62 | } |
| 63 | |
| 64 | if (section->offset_within_address_space < iova_min) { |
| 65 | error_report("RAM section out of device range (min=0x%" PRIx64 |
| 66 | ", addr=0x%" HWADDR_PRIx ")", |
| 67 | iova_min, section->offset_within_address_space); |
| 68 | return true; |
| 69 | } |
| 70 | /* |
| 71 | * While using vIOMMU, sometimes the section will be larger than iova_max, |
| 72 | * but the memory that actually maps is smaller, so move the check to |
| 73 | * function vhost_vdpa_iommu_map_notify(). That function will use the actual |
| 74 | * size that maps to the kernel |
| 75 | */ |
| 76 | |
| 77 | if (!is_iommu) { |
| 78 | llend = vhost_vdpa_section_end(section, page_mask); |
| 79 | if (int128_gt(llend, int128_make64(iova_max))) { |
| 80 | error_report("RAM section out of device range (max=0x%" PRIx64 |
| 81 | ", end addr=0x%" PRIx64 ")", |
| 82 | iova_max, int128_get64(llend)); |
| 83 | return true; |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | return false; |
| 88 | } |
| 89 | |
| 90 | /* |
| 91 | * The caller must set asid = 0 if the device does not support asid. |
| 92 | * This is not an ABI break since it is set to 0 by the initializer anyway. |
| 93 | */ |
| 94 | int vhost_vdpa_dma_map(VhostVDPAShared *s, uint32_t asid, hwaddr iova, |
| 95 | hwaddr size, void *vaddr, bool readonly) |
| 96 | { |
| 97 | struct vhost_msg_v2 msg = {}; |
| 98 | int fd = s->device_fd; |
| 99 | int ret = 0; |
| 100 | |
| 101 | msg.type = VHOST_IOTLB_MSG_V2; |
| 102 | msg.asid = asid; |
| 103 | msg.iotlb.iova = iova; |
| 104 | msg.iotlb.size = size; |
| 105 | msg.iotlb.uaddr = (uint64_t)(uintptr_t)vaddr; |
| 106 | msg.iotlb.perm = readonly ? VHOST_ACCESS_RO : VHOST_ACCESS_RW; |
| 107 | msg.iotlb.type = VHOST_IOTLB_UPDATE; |
| 108 | |
| 109 | trace_vhost_vdpa_dma_map(s, fd, msg.type, msg.asid, msg.iotlb.iova, |
| 110 | msg.iotlb.size, msg.iotlb.uaddr, msg.iotlb.perm, |
| 111 | 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 | /* |
| 123 | * The caller must set asid = 0 if the device does not support asid. |
| 124 | * This is not an ABI break since it is set to 0 by the initializer anyway. |
| 125 | */ |
| 126 | int vhost_vdpa_dma_unmap(VhostVDPAShared *s, uint32_t asid, hwaddr iova, |
| 127 | hwaddr size) |
| 128 | { |
| 129 | struct vhost_msg_v2 msg = {}; |
| 130 | int fd = s->device_fd; |
| 131 | int ret = 0; |
| 132 | |
| 133 | msg.type = VHOST_IOTLB_MSG_V2; |
| 134 | msg.asid = asid; |
| 135 | msg.iotlb.iova = iova; |
| 136 | msg.iotlb.size = size; |
| 137 | msg.iotlb.type = VHOST_IOTLB_INVALIDATE; |
| 138 | |
| 139 | trace_vhost_vdpa_dma_unmap(s, fd, msg.type, msg.asid, msg.iotlb.iova, |
| 140 | msg.iotlb.size, msg.iotlb.type); |
| 141 | |
| 142 | if (write(fd, &msg, sizeof(msg)) != sizeof(msg)) { |
| 143 | error_report("failed to write, fd=%d, errno=%d (%s)", |
| 144 | fd, errno, strerror(errno)); |
| 145 | return -EIO ; |
| 146 | } |
| 147 | |
| 148 | return ret; |
| 149 | } |
| 150 | |
| 151 | static void vhost_vdpa_listener_begin_batch(VhostVDPAShared *s) |
| 152 | { |
| 153 | int fd = s->device_fd; |
| 154 | struct vhost_msg_v2 msg = { |
| 155 | .type = VHOST_IOTLB_MSG_V2, |
| 156 | .iotlb.type = VHOST_IOTLB_BATCH_BEGIN, |
| 157 | }; |
| 158 | |
| 159 | trace_vhost_vdpa_listener_begin_batch(s, fd, msg.type, msg.iotlb.type); |
| 160 | if (write(fd, &msg, sizeof(msg)) != sizeof(msg)) { |
| 161 | error_report("failed to write, fd=%d, errno=%d (%s)", |
| 162 | fd, errno, strerror(errno)); |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | static void vhost_vdpa_iotlb_batch_begin_once(VhostVDPAShared *s) |
| 167 | { |
| 168 | if (s->backend_cap & (0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH) && |
| 169 | !s->iotlb_batch_begin_sent) { |
| 170 | vhost_vdpa_listener_begin_batch(s); |
| 171 | } |
| 172 | |
| 173 | s->iotlb_batch_begin_sent = true; |
| 174 | } |
| 175 | |
| 176 | static void vhost_vdpa_listener_commit(MemoryListener *listener) |
| 177 | { |
| 178 | VhostVDPAShared *s = container_of(listener, VhostVDPAShared, listener); |
| 179 | struct vhost_msg_v2 msg = {}; |
| 180 | int fd = s->device_fd; |
| 181 | |
| 182 | if (!(s->backend_cap & (0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH))) { |
| 183 | return; |
| 184 | } |
| 185 | |
| 186 | if (!s->iotlb_batch_begin_sent) { |
| 187 | return; |
| 188 | } |
| 189 | |
| 190 | msg.type = VHOST_IOTLB_MSG_V2; |
| 191 | msg.iotlb.type = VHOST_IOTLB_BATCH_END; |
| 192 | |
| 193 | trace_vhost_vdpa_listener_commit(s, fd, msg.type, msg.iotlb.type); |
| 194 | if (write(fd, &msg, sizeof(msg)) != sizeof(msg)) { |
| 195 | error_report("failed to write, fd=%d, errno=%d (%s)", |
| 196 | fd, errno, strerror(errno)); |
| 197 | } |
| 198 | |
| 199 | s->iotlb_batch_begin_sent = false; |
| 200 | } |
| 201 | |
| 202 | static void vhost_vdpa_iommu_map_notify(IOMMUNotifier *n, IOMMUTLBEntry *iotlb) |
| 203 | { |
| 204 | struct vdpa_iommu *iommu = container_of(n, struct vdpa_iommu, n); |
| 205 | |
| 206 | hwaddr iova = iotlb->iova + iommu->iommu_offset; |
| 207 | VhostVDPAShared *s = iommu->dev_shared; |
| 208 | void *vaddr; |
| 209 | int ret; |
| 210 | Int128 llend; |
| 211 | Error *local_err = NULL; |
| 212 | MemoryRegion *mr; |
| 213 | hwaddr xlat; |
| 214 | |
| 215 | if (iotlb->target_as != &address_space_memory) { |
| 216 | error_report("Wrong target AS \"%s\", only system memory is allowed", |
| 217 | iotlb->target_as->name ? iotlb->target_as->name : "none"); |
| 218 | return; |
| 219 | } |
| 220 | RCU_READ_LOCK_GUARD(); |
| 221 | /* check if RAM section out of device range */ |
| 222 | llend = int128_add(int128_makes64(iotlb->addr_mask), int128_makes64(iova)); |
| 223 | if (int128_gt(llend, int128_make64(s->iova_range.last))) { |
| 224 | error_report("RAM section out of device range (max=0x%" PRIx64 |
| 225 | ", end addr=0x%" PRIx64 ")", |
| 226 | s->iova_range.last, int128_get64(llend)); |
| 227 | return; |
| 228 | } |
| 229 | |
| 230 | if ((iotlb->perm & IOMMU_RW) != IOMMU_NONE) { |
| 231 | bool read_only; |
| 232 | |
| 233 | mr = memory_translate_iotlb(iotlb, &xlat, &local_err); |
| 234 | if (!mr) { |
| 235 | error_report_err(local_err); |
| 236 | return; |
| 237 | } |
| 238 | vaddr = memory_region_get_ram_ptr(mr) + xlat; |
| 239 | read_only = !(iotlb->perm & IOMMU_WO) || mr->readonly; |
| 240 | |
| 241 | ret = vhost_vdpa_dma_map(s, VHOST_VDPA_GUEST_PA_ASID, iova, |
| 242 | iotlb->addr_mask + 1, vaddr, read_only); |
| 243 | if (ret) { |
| 244 | error_report("vhost_vdpa_dma_map(%p, 0x%" HWADDR_PRIx ", " |
| 245 | "0x%" HWADDR_PRIx ", %p) = %d (%m)", |
| 246 | s, iova, iotlb->addr_mask + 1, vaddr, ret); |
| 247 | } |
| 248 | } else { |
| 249 | ret = vhost_vdpa_dma_unmap(s, VHOST_VDPA_GUEST_PA_ASID, iova, |
| 250 | iotlb->addr_mask + 1); |
| 251 | if (ret) { |
| 252 | error_report("vhost_vdpa_dma_unmap(%p, 0x%" HWADDR_PRIx ", " |
| 253 | "0x%" HWADDR_PRIx ") = %d (%m)", |
| 254 | s, iova, iotlb->addr_mask + 1, ret); |
| 255 | } |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | static void vhost_vdpa_iommu_region_add(MemoryListener *listener, |
| 260 | MemoryRegionSection *section) |
| 261 | { |
| 262 | VhostVDPAShared *s = container_of(listener, VhostVDPAShared, listener); |
| 263 | |
| 264 | struct vdpa_iommu *iommu; |
| 265 | Int128 end; |
| 266 | int iommu_idx; |
| 267 | IOMMUMemoryRegion *iommu_mr; |
| 268 | int ret; |
| 269 | |
| 270 | iommu_mr = IOMMU_MEMORY_REGION(section->mr); |
| 271 | |
| 272 | iommu = g_malloc0(sizeof(*iommu)); |
| 273 | end = int128_add(int128_make64(section->offset_within_region), |
| 274 | section->size); |
| 275 | end = int128_sub(end, int128_one()); |
| 276 | iommu_idx = memory_region_iommu_attrs_to_index(iommu_mr, |
| 277 | MEMTXATTRS_UNSPECIFIED); |
| 278 | iommu->iommu_mr = iommu_mr; |
| 279 | iommu_notifier_init(&iommu->n, vhost_vdpa_iommu_map_notify, |
| 280 | IOMMU_NOTIFIER_IOTLB_EVENTS, |
| 281 | section->offset_within_region, |
| 282 | int128_get64(end), |
| 283 | iommu_idx); |
| 284 | iommu->iommu_offset = section->offset_within_address_space - |
| 285 | section->offset_within_region; |
| 286 | iommu->dev_shared = s; |
| 287 | |
| 288 | ret = memory_region_register_iommu_notifier(section->mr, &iommu->n, NULL); |
| 289 | if (ret) { |
| 290 | g_free(iommu); |
| 291 | return; |
| 292 | } |
| 293 | |
| 294 | QLIST_INSERT_HEAD(&s->iommu_list, iommu, iommu_next); |
| 295 | memory_region_iommu_replay(iommu->iommu_mr, &iommu->n); |
| 296 | } |
| 297 | |
| 298 | static void vhost_vdpa_iommu_region_del(MemoryListener *listener, |
| 299 | MemoryRegionSection *section) |
| 300 | { |
| 301 | VhostVDPAShared *s = container_of(listener, VhostVDPAShared, listener); |
| 302 | |
| 303 | struct vdpa_iommu *iommu; |
| 304 | |
| 305 | QLIST_FOREACH(iommu, &s->iommu_list, iommu_next) |
| 306 | { |
| 307 | if (MEMORY_REGION(iommu->iommu_mr) == section->mr && |
| 308 | iommu->n.start == section->offset_within_region) { |
| 309 | memory_region_unregister_iommu_notifier(section->mr, &iommu->n); |
| 310 | QLIST_REMOVE(iommu, iommu_next); |
| 311 | g_free(iommu); |
| 312 | break; |
| 313 | } |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | static void vhost_vdpa_listener_region_add(MemoryListener *listener, |
| 318 | MemoryRegionSection *section) |
| 319 | { |
| 320 | DMAMap mem_region = {}; |
| 321 | VhostVDPAShared *s = container_of(listener, VhostVDPAShared, listener); |
| 322 | hwaddr iova; |
| 323 | Int128 llend, llsize; |
| 324 | void *vaddr; |
| 325 | int ret; |
| 326 | int page_size = qemu_target_page_size(); |
| 327 | int page_mask = -page_size; |
| 328 | |
| 329 | if (vhost_vdpa_listener_skipped_section(section, s->iova_range.first, |
| 330 | s->iova_range.last, page_mask)) { |
| 331 | return; |
| 332 | } |
| 333 | if (memory_region_is_iommu(section->mr)) { |
| 334 | vhost_vdpa_iommu_region_add(listener, section); |
| 335 | return; |
| 336 | } |
| 337 | |
| 338 | if (unlikely((section->offset_within_address_space & ~page_mask) != |
| 339 | (section->offset_within_region & ~page_mask))) { |
| 340 | trace_vhost_vdpa_listener_region_add_unaligned(s, section->mr->name, |
| 341 | section->offset_within_address_space & ~page_mask, |
| 342 | section->offset_within_region & ~page_mask); |
| 343 | return; |
| 344 | } |
| 345 | |
| 346 | iova = ROUND_UP(section->offset_within_address_space, page_size); |
| 347 | llend = vhost_vdpa_section_end(section, page_mask); |
| 348 | if (int128_ge(int128_make64(iova), llend)) { |
| 349 | return; |
| 350 | } |
| 351 | |
| 352 | memory_region_ref(section->mr); |
| 353 | |
| 354 | /* Here we assume that memory_region_is_ram(section->mr)==true */ |
| 355 | |
| 356 | vaddr = memory_region_get_ram_ptr(section->mr) + |
| 357 | section->offset_within_region + |
| 358 | (iova - section->offset_within_address_space); |
| 359 | |
| 360 | trace_vhost_vdpa_listener_region_add(s, iova, int128_get64(llend), |
| 361 | vaddr, section->readonly); |
| 362 | |
| 363 | llsize = int128_sub(llend, int128_make64(iova)); |
| 364 | if (s->shadow_data) { |
| 365 | int r; |
| 366 | hwaddr gpa = section->offset_within_address_space; |
| 367 | |
| 368 | mem_region.size = int128_get64(llsize) - 1, |
| 369 | mem_region.perm = IOMMU_ACCESS_FLAG(true, section->readonly), |
| 370 | |
| 371 | r = vhost_iova_tree_map_alloc_gpa(s->iova_tree, &mem_region, gpa); |
| 372 | if (unlikely(r != IOVA_OK)) { |
| 373 | error_report("Can't allocate a mapping (%d)", r); |
| 374 | |
| 375 | if (mem_region.translated_addr == gpa) { |
| 376 | error_report("Insertion to GPA->IOVA tree failed"); |
| 377 | /* Remove the mapping from the IOVA-only tree */ |
| 378 | goto fail_map; |
| 379 | } |
| 380 | goto fail; |
| 381 | } |
| 382 | |
| 383 | iova = mem_region.iova; |
| 384 | } |
| 385 | |
| 386 | vhost_vdpa_iotlb_batch_begin_once(s); |
| 387 | ret = vhost_vdpa_dma_map(s, VHOST_VDPA_GUEST_PA_ASID, iova, |
| 388 | int128_get64(llsize), vaddr, section->readonly); |
| 389 | if (ret) { |
| 390 | error_report("vhost vdpa map fail!"); |
| 391 | goto fail_map; |
| 392 | } |
| 393 | |
| 394 | return; |
| 395 | |
| 396 | fail_map: |
| 397 | if (s->shadow_data) { |
| 398 | vhost_iova_tree_remove_gpa(s->iova_tree, mem_region); |
| 399 | } |
| 400 | |
| 401 | fail: |
| 402 | /* |
| 403 | * On the initfn path, store the first error in the container so we |
| 404 | * can gracefully fail. Runtime, there's not much we can do other |
| 405 | * than throw a hardware error. |
| 406 | */ |
| 407 | error_report("vhost-vdpa: DMA mapping failed, unable to continue"); |
| 408 | return; |
| 409 | |
| 410 | } |
| 411 | |
| 412 | static void vhost_vdpa_listener_region_del(MemoryListener *listener, |
| 413 | MemoryRegionSection *section) |
| 414 | { |
| 415 | VhostVDPAShared *s = container_of(listener, VhostVDPAShared, listener); |
| 416 | hwaddr iova; |
| 417 | Int128 llend, llsize; |
| 418 | int ret; |
| 419 | int page_size = qemu_target_page_size(); |
| 420 | int page_mask = -page_size; |
| 421 | |
| 422 | if (vhost_vdpa_listener_skipped_section(section, s->iova_range.first, |
| 423 | s->iova_range.last, page_mask)) { |
| 424 | return; |
| 425 | } |
| 426 | if (memory_region_is_iommu(section->mr)) { |
| 427 | vhost_vdpa_iommu_region_del(listener, section); |
| 428 | } |
| 429 | |
| 430 | if (unlikely((section->offset_within_address_space & ~page_mask) != |
| 431 | (section->offset_within_region & ~page_mask))) { |
| 432 | trace_vhost_vdpa_listener_region_del_unaligned(s, section->mr->name, |
| 433 | section->offset_within_address_space & ~page_mask, |
| 434 | section->offset_within_region & ~page_mask); |
| 435 | return; |
| 436 | } |
| 437 | |
| 438 | iova = ROUND_UP(section->offset_within_address_space, page_size); |
| 439 | llend = vhost_vdpa_section_end(section, page_mask); |
| 440 | |
| 441 | trace_vhost_vdpa_listener_region_del(s, iova, |
| 442 | int128_get64(int128_sub(llend, int128_one()))); |
| 443 | |
| 444 | if (int128_ge(int128_make64(iova), llend)) { |
| 445 | return; |
| 446 | } |
| 447 | |
| 448 | llsize = int128_sub(llend, int128_make64(iova)); |
| 449 | |
| 450 | if (s->shadow_data) { |
| 451 | const DMAMap *result; |
| 452 | DMAMap mem_region = { |
| 453 | .translated_addr = section->offset_within_address_space, |
| 454 | .size = int128_get64(llsize) - 1, |
| 455 | }; |
| 456 | |
| 457 | result = vhost_iova_tree_find_gpa(s->iova_tree, &mem_region); |
| 458 | if (!result) { |
| 459 | /* The memory listener map wasn't mapped */ |
| 460 | return; |
| 461 | } |
| 462 | iova = result->iova; |
| 463 | vhost_iova_tree_remove_gpa(s->iova_tree, *result); |
| 464 | } |
| 465 | vhost_vdpa_iotlb_batch_begin_once(s); |
| 466 | /* |
| 467 | * The unmap ioctl doesn't accept a full 64-bit. need to check it |
| 468 | */ |
| 469 | if (int128_eq(llsize, int128_2_64())) { |
| 470 | llsize = int128_rshift(llsize, 1); |
| 471 | ret = vhost_vdpa_dma_unmap(s, VHOST_VDPA_GUEST_PA_ASID, iova, |
| 472 | int128_get64(llsize)); |
| 473 | |
| 474 | if (ret) { |
| 475 | error_report("vhost_vdpa_dma_unmap(%p, 0x%" HWADDR_PRIx ", " |
| 476 | "0x%" HWADDR_PRIx ") = %d (%m)", |
| 477 | s, iova, int128_get64(llsize), ret); |
| 478 | } |
| 479 | iova += int128_get64(llsize); |
| 480 | } |
| 481 | ret = vhost_vdpa_dma_unmap(s, VHOST_VDPA_GUEST_PA_ASID, iova, |
| 482 | int128_get64(llsize)); |
| 483 | |
| 484 | if (ret) { |
| 485 | error_report("vhost_vdpa_dma_unmap(%p, 0x%" HWADDR_PRIx ", " |
| 486 | "0x%" HWADDR_PRIx ") = %d (%m)", |
| 487 | s, iova, int128_get64(llsize), ret); |
| 488 | } |
| 489 | |
| 490 | memory_region_unref(section->mr); |
| 491 | } |
| 492 | /* |
| 493 | * IOTLB API is used by vhost-vdpa which requires incremental updating |
| 494 | * of the mapping. So we can not use generic vhost memory listener which |
| 495 | * depends on the addnop(). |
| 496 | */ |
| 497 | static const MemoryListener vhost_vdpa_memory_listener = { |
| 498 | .name = "vhost-vdpa", |
| 499 | .commit = vhost_vdpa_listener_commit, |
| 500 | .region_add = vhost_vdpa_listener_region_add, |
| 501 | .region_del = vhost_vdpa_listener_region_del, |
| 502 | }; |
| 503 | |
| 504 | static int vhost_vdpa_call(struct vhost_dev *dev, unsigned long int request, |
| 505 | void *arg) |
| 506 | { |
| 507 | struct vhost_vdpa *v = dev->opaque; |
| 508 | int fd = v->shared->device_fd; |
| 509 | int ret; |
| 510 | |
| 511 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); |
| 512 | |
| 513 | ret = ioctl(fd, request, arg); |
| 514 | return ret < 0 ? -errno : ret; |
| 515 | } |
| 516 | |
| 517 | static int vhost_vdpa_add_status(struct vhost_dev *dev, uint8_t status) |
| 518 | { |
| 519 | uint8_t s; |
| 520 | int ret; |
| 521 | |
| 522 | trace_vhost_vdpa_add_status(dev, status); |
| 523 | ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &s); |
| 524 | if (ret < 0) { |
| 525 | return ret; |
| 526 | } |
| 527 | if ((s & status) == status) { |
| 528 | /* Don't set bits already set */ |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | s |= status; |
| 533 | |
| 534 | ret = vhost_vdpa_call(dev, VHOST_VDPA_SET_STATUS, &s); |
| 535 | if (ret < 0) { |
| 536 | return ret; |
| 537 | } |
| 538 | |
| 539 | ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_STATUS, &s); |
| 540 | if (ret < 0) { |
| 541 | return ret; |
| 542 | } |
| 543 | |
| 544 | if (!(s & status)) { |
| 545 | return -EIO; |
| 546 | } |
| 547 | |
| 548 | return 0; |
| 549 | } |
| 550 | |
| 551 | int vhost_vdpa_get_iova_range(int fd, struct vhost_vdpa_iova_range *iova_range) |
| 552 | { |
| 553 | int ret = ioctl(fd, VHOST_VDPA_GET_IOVA_RANGE, iova_range); |
| 554 | |
| 555 | return ret < 0 ? -errno : 0; |
| 556 | } |
| 557 | |
| 558 | /* |
| 559 | * The use of this function is for requests that only need to be |
| 560 | * applied once. Typically such request occurs at the beginning |
| 561 | * of operation, and before setting up queues. It should not be |
| 562 | * used for request that performs operation until all queues are |
| 563 | * set, which would need to check dev->vq_index_end instead. |
| 564 | */ |
| 565 | static bool vhost_vdpa_first_dev(struct vhost_dev *dev) |
| 566 | { |
| 567 | struct vhost_vdpa *v = dev->opaque; |
| 568 | |
| 569 | return v->index == 0; |
| 570 | } |
| 571 | |
| 572 | static bool vhost_vdpa_last_dev(struct vhost_dev *dev) |
| 573 | { |
| 574 | return dev->vq_index + dev->nvqs == dev->vq_index_end; |
| 575 | } |
| 576 | |
| 577 | static int vhost_vdpa_get_dev_features(struct vhost_dev *dev, |
| 578 | uint64_t *features) |
| 579 | { |
| 580 | int ret; |
| 581 | |
| 582 | ret = vhost_vdpa_call(dev, VHOST_GET_FEATURES, features); |
| 583 | trace_vhost_vdpa_get_features(dev, *features); |
| 584 | return ret; |
| 585 | } |
| 586 | |
| 587 | static void vhost_vdpa_init_svq(struct vhost_dev *hdev, struct vhost_vdpa *v) |
| 588 | { |
| 589 | g_autoptr(GPtrArray) shadow_vqs = NULL; |
| 590 | |
| 591 | shadow_vqs = g_ptr_array_new_full(hdev->nvqs, vhost_svq_free); |
| 592 | for (unsigned n = 0; n < hdev->nvqs; ++n) { |
| 593 | VhostShadowVirtqueue *svq; |
| 594 | |
| 595 | svq = vhost_svq_new(v->shadow_vq_ops, v->shadow_vq_ops_opaque); |
| 596 | g_ptr_array_add(shadow_vqs, svq); |
| 597 | } |
| 598 | |
| 599 | v->shadow_vqs = g_steal_pointer(&shadow_vqs); |
| 600 | } |
| 601 | |
| 602 | static int vhost_vdpa_set_backend_cap(struct vhost_dev *dev) |
| 603 | { |
| 604 | struct vhost_vdpa *v = dev->opaque; |
| 605 | |
| 606 | uint64_t features; |
| 607 | uint64_t f = 0x1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2 | |
| 608 | 0x1ULL << VHOST_BACKEND_F_IOTLB_BATCH | |
| 609 | 0x1ULL << VHOST_BACKEND_F_IOTLB_ASID | |
| 610 | 0x1ULL << VHOST_BACKEND_F_SUSPEND; |
| 611 | int r; |
| 612 | |
| 613 | if (vhost_vdpa_call(dev, VHOST_GET_BACKEND_FEATURES, &features)) { |
| 614 | return -EFAULT; |
| 615 | } |
| 616 | |
| 617 | features &= f; |
| 618 | |
| 619 | if (vhost_vdpa_first_dev(dev)) { |
| 620 | r = vhost_vdpa_call(dev, VHOST_SET_BACKEND_FEATURES, &features); |
| 621 | if (r) { |
| 622 | return -EFAULT; |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | dev->backend_cap = features; |
| 627 | v->shared->backend_cap = features; |
| 628 | |
| 629 | return 0; |
| 630 | } |
| 631 | |
| 632 | static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp) |
| 633 | { |
| 634 | struct vhost_vdpa *v = opaque; |
| 635 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); |
| 636 | trace_vhost_vdpa_init(dev, v->shared, opaque); |
| 637 | int ret; |
| 638 | |
| 639 | v->dev = dev; |
| 640 | dev->opaque = opaque ; |
| 641 | |
| 642 | ret = vhost_vdpa_set_backend_cap(dev); |
| 643 | if (unlikely(ret != 0)) { |
| 644 | return ret; |
| 645 | } |
| 646 | |
| 647 | vhost_vdpa_init_svq(dev, v); |
| 648 | |
| 649 | error_propagate(&dev->migration_blocker, v->migration_blocker); |
| 650 | if (!vhost_vdpa_first_dev(dev)) { |
| 651 | return 0; |
| 652 | } |
| 653 | |
| 654 | /* |
| 655 | * If dev->shadow_vqs_enabled at initialization that means the device has |
| 656 | * been started with x-svq=on, so don't block migration |
| 657 | */ |
| 658 | if (dev->migration_blocker == NULL && !v->shadow_vqs_enabled) { |
| 659 | /* We don't have dev->features yet */ |
| 660 | uint64_t features; |
| 661 | ret = vhost_vdpa_get_dev_features(dev, &features); |
| 662 | if (unlikely(ret)) { |
| 663 | error_setg_errno(errp, -ret, "Could not get device features"); |
| 664 | return ret; |
| 665 | } |
| 666 | vhost_svq_valid_features(features, &dev->migration_blocker); |
| 667 | } |
| 668 | |
| 669 | /* |
| 670 | * Similar to VFIO, we end up pinning all guest memory and have to |
| 671 | * disable discarding of RAM. |
| 672 | */ |
| 673 | ret = ram_block_discard_disable(true); |
| 674 | if (ret) { |
| 675 | error_report("Cannot set discarding of RAM broken"); |
| 676 | return ret; |
| 677 | } |
| 678 | |
| 679 | vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE | |
| 680 | VIRTIO_CONFIG_S_DRIVER); |
| 681 | |
| 682 | v->shared->listener = vhost_vdpa_memory_listener; |
| 683 | return 0; |
| 684 | } |
| 685 | |
| 686 | static void vhost_vdpa_host_notifier_uninit(struct vhost_dev *dev, |
| 687 | int queue_index) |
| 688 | { |
| 689 | size_t page_size = qemu_real_host_page_size(); |
| 690 | struct vhost_vdpa *v = dev->opaque; |
| 691 | VirtIODevice *vdev = dev->vdev; |
| 692 | VhostVDPAHostNotifier *n; |
| 693 | |
| 694 | n = &v->notifier[queue_index]; |
| 695 | |
| 696 | if (n->addr) { |
| 697 | virtio_queue_set_host_notifier_mr(vdev, queue_index, &n->mr, false); |
| 698 | object_unparent(OBJECT(&n->mr)); |
| 699 | munmap(n->addr, page_size); |
| 700 | n->addr = NULL; |
| 701 | } |
| 702 | } |
| 703 | |
| 704 | static int vhost_vdpa_host_notifier_init(struct vhost_dev *dev, int queue_index) |
| 705 | { |
| 706 | size_t page_size = qemu_real_host_page_size(); |
| 707 | struct vhost_vdpa *v = dev->opaque; |
| 708 | VirtIODevice *vdev = dev->vdev; |
| 709 | VhostVDPAHostNotifier *n; |
| 710 | int fd = v->shared->device_fd; |
| 711 | void *addr; |
| 712 | char *name; |
| 713 | |
| 714 | vhost_vdpa_host_notifier_uninit(dev, queue_index); |
| 715 | |
| 716 | n = &v->notifier[queue_index]; |
| 717 | |
| 718 | addr = mmap(NULL, page_size, PROT_WRITE, MAP_SHARED, fd, |
| 719 | queue_index * page_size); |
| 720 | if (addr == MAP_FAILED) { |
| 721 | goto err; |
| 722 | } |
| 723 | |
| 724 | name = g_strdup_printf("vhost-vdpa/host-notifier@%p mmaps[%d]", |
| 725 | v, queue_index); |
| 726 | memory_region_init_ram_device_ptr(&n->mr, OBJECT(vdev), name, |
| 727 | page_size, addr); |
| 728 | g_free(name); |
| 729 | |
| 730 | if (virtio_queue_set_host_notifier_mr(vdev, queue_index, &n->mr, true)) { |
| 731 | object_unparent(OBJECT(&n->mr)); |
| 732 | munmap(addr, page_size); |
| 733 | goto err; |
| 734 | } |
| 735 | n->addr = addr; |
| 736 | |
| 737 | return 0; |
| 738 | |
| 739 | err: |
| 740 | return -1; |
| 741 | } |
| 742 | |
| 743 | static void vhost_vdpa_host_notifiers_uninit(struct vhost_dev *dev, int n) |
| 744 | { |
| 745 | int i; |
| 746 | |
| 747 | /* |
| 748 | * Pack all the changes to the memory regions in a single |
| 749 | * transaction to avoid a few updating of the address space |
| 750 | * topology. |
| 751 | */ |
| 752 | memory_region_transaction_begin(); |
| 753 | |
| 754 | for (i = dev->vq_index; i < dev->vq_index + n; i++) { |
| 755 | vhost_vdpa_host_notifier_uninit(dev, i); |
| 756 | } |
| 757 | |
| 758 | memory_region_transaction_commit(); |
| 759 | } |
| 760 | |
| 761 | static void vhost_vdpa_host_notifiers_init(struct vhost_dev *dev) |
| 762 | { |
| 763 | struct vhost_vdpa *v = dev->opaque; |
| 764 | int i; |
| 765 | |
| 766 | if (v->shadow_vqs_enabled) { |
| 767 | /* FIXME SVQ is not compatible with host notifiers mr */ |
| 768 | return; |
| 769 | } |
| 770 | |
| 771 | /* |
| 772 | * Pack all the changes to the memory regions in a single |
| 773 | * transaction to avoid a few updating of the address space |
| 774 | * topology. |
| 775 | */ |
| 776 | memory_region_transaction_begin(); |
| 777 | |
| 778 | for (i = dev->vq_index; i < dev->vq_index + dev->nvqs; i++) { |
| 779 | if (vhost_vdpa_host_notifier_init(dev, i)) { |
| 780 | vhost_vdpa_host_notifiers_uninit(dev, i - dev->vq_index); |
| 781 | break; |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | memory_region_transaction_commit(); |
| 786 | } |
| 787 | |
| 788 | static void vhost_vdpa_svq_cleanup(struct vhost_dev *dev) |
| 789 | { |
| 790 | struct vhost_vdpa *v = dev->opaque; |
| 791 | size_t idx; |
| 792 | |
| 793 | for (idx = 0; idx < v->shadow_vqs->len; ++idx) { |
| 794 | vhost_svq_stop(g_ptr_array_index(v->shadow_vqs, idx)); |
| 795 | } |
| 796 | g_ptr_array_free(v->shadow_vqs, true); |
| 797 | } |
| 798 | |
| 799 | static int vhost_vdpa_cleanup(struct vhost_dev *dev) |
| 800 | { |
| 801 | struct vhost_vdpa *v; |
| 802 | assert(dev->vhost_ops->backend_type == VHOST_BACKEND_TYPE_VDPA); |
| 803 | v = dev->opaque; |
| 804 | trace_vhost_vdpa_cleanup(dev, v); |
| 805 | if (vhost_vdpa_first_dev(dev)) { |
| 806 | ram_block_discard_disable(false); |
| 807 | memory_listener_unregister(&v->shared->listener); |
| 808 | } |
| 809 | |
| 810 | vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs); |
| 811 | vhost_vdpa_svq_cleanup(dev); |
| 812 | |
| 813 | dev->opaque = NULL; |
| 814 | |
| 815 | return 0; |
| 816 | } |
| 817 | |
| 818 | static int vhost_vdpa_memslots_limit(struct vhost_dev *dev) |
| 819 | { |
| 820 | trace_vhost_vdpa_memslots_limit(dev, INT_MAX); |
| 821 | return INT_MAX; |
| 822 | } |
| 823 | |
| 824 | static int vhost_vdpa_set_mem_table(struct vhost_dev *dev, |
| 825 | struct vhost_memory *mem) |
| 826 | { |
| 827 | if (!vhost_vdpa_first_dev(dev)) { |
| 828 | return 0; |
| 829 | } |
| 830 | |
| 831 | trace_vhost_vdpa_set_mem_table(dev, mem->nregions, mem->padding); |
| 832 | if (trace_event_get_state_backends(TRACE_VHOST_VDPA_SET_MEM_TABLE) && |
| 833 | trace_event_get_state_backends(TRACE_VHOST_VDPA_DUMP_REGIONS)) { |
| 834 | int i; |
| 835 | for (i = 0; i < mem->nregions; i++) { |
| 836 | trace_vhost_vdpa_dump_regions(dev, i, |
| 837 | mem->regions[i].guest_phys_addr, |
| 838 | mem->regions[i].memory_size, |
| 839 | mem->regions[i].userspace_addr, |
| 840 | mem->regions[i].flags_padding); |
| 841 | } |
| 842 | } |
| 843 | if (mem->padding) { |
| 844 | return -EINVAL; |
| 845 | } |
| 846 | |
| 847 | return 0; |
| 848 | } |
| 849 | |
| 850 | static int vhost_vdpa_set_features(struct vhost_dev *dev, |
| 851 | uint64_t features) |
| 852 | { |
| 853 | struct vhost_vdpa *v = dev->opaque; |
| 854 | int ret; |
| 855 | |
| 856 | if (!vhost_vdpa_first_dev(dev)) { |
| 857 | return 0; |
| 858 | } |
| 859 | |
| 860 | if (v->shadow_vqs_enabled) { |
| 861 | if ((v->acked_features ^ features) == BIT_ULL(VHOST_F_LOG_ALL)) { |
| 862 | /* |
| 863 | * QEMU is just trying to enable or disable logging. SVQ handles |
| 864 | * this sepparately, so no need to forward this. |
| 865 | */ |
| 866 | v->acked_features = features; |
| 867 | return 0; |
| 868 | } |
| 869 | |
| 870 | v->acked_features = features; |
| 871 | |
| 872 | /* We must not ack _F_LOG if SVQ is enabled */ |
| 873 | features &= ~BIT_ULL(VHOST_F_LOG_ALL); |
| 874 | } |
| 875 | |
| 876 | trace_vhost_vdpa_set_features(dev, features); |
| 877 | ret = vhost_vdpa_call(dev, VHOST_SET_FEATURES, &features); |
| 878 | if (ret) { |
| 879 | return ret; |
| 880 | } |
| 881 | |
| 882 | return vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK); |
| 883 | } |
| 884 | |
| 885 | static int vhost_vdpa_get_device_id(struct vhost_dev *dev, |
| 886 | uint32_t *device_id) |
| 887 | { |
| 888 | int ret; |
| 889 | ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_DEVICE_ID, device_id); |
| 890 | trace_vhost_vdpa_get_device_id(dev, *device_id); |
| 891 | return ret; |
| 892 | } |
| 893 | |
| 894 | static int vhost_vdpa_reset_device(struct vhost_dev *dev) |
| 895 | { |
| 896 | struct vhost_vdpa *v = dev->opaque; |
| 897 | int ret; |
| 898 | uint8_t status = 0; |
| 899 | |
| 900 | ret = vhost_vdpa_call(dev, VHOST_VDPA_SET_STATUS, &status); |
| 901 | trace_vhost_vdpa_reset_device(dev); |
| 902 | if (ret) { |
| 903 | return ret; |
| 904 | } |
| 905 | |
| 906 | memory_listener_unregister(&v->shared->listener); |
| 907 | v->shared->listener_registered = false; |
| 908 | v->shared->suspended = false; |
| 909 | return 0; |
| 910 | } |
| 911 | |
| 912 | static int vhost_vdpa_get_vq_index(struct vhost_dev *dev, int idx) |
| 913 | { |
| 914 | assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); |
| 915 | |
| 916 | trace_vhost_vdpa_get_vq_index(dev, idx, idx); |
| 917 | return idx; |
| 918 | } |
| 919 | |
| 920 | static int vhost_vdpa_set_vring_enable_one(struct vhost_vdpa *v, unsigned idx, |
| 921 | int enable) |
| 922 | { |
| 923 | struct vhost_dev *dev = v->dev; |
| 924 | struct vhost_vring_state state = { |
| 925 | .index = idx, |
| 926 | .num = enable, |
| 927 | }; |
| 928 | int r = vhost_vdpa_call(dev, VHOST_VDPA_SET_VRING_ENABLE, &state); |
| 929 | |
| 930 | trace_vhost_vdpa_set_vring_enable_one(dev, idx, enable, r); |
| 931 | return r; |
| 932 | } |
| 933 | |
| 934 | static int vhost_vdpa_set_vring_enable(struct vhost_dev *dev, int enable) |
| 935 | { |
| 936 | struct vhost_vdpa *v = dev->opaque; |
| 937 | unsigned int i; |
| 938 | int ret; |
| 939 | |
| 940 | for (i = 0; i < dev->nvqs; ++i) { |
| 941 | ret = vhost_vdpa_set_vring_enable_one(v, i, enable); |
| 942 | if (ret < 0) { |
| 943 | return ret; |
| 944 | } |
| 945 | } |
| 946 | |
| 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | int vhost_vdpa_set_vring_ready(struct vhost_vdpa *v, unsigned idx) |
| 951 | { |
| 952 | return vhost_vdpa_set_vring_enable_one(v, idx, 1); |
| 953 | } |
| 954 | |
| 955 | static int vhost_vdpa_set_config_call(struct vhost_dev *dev, |
| 956 | int fd) |
| 957 | { |
| 958 | trace_vhost_vdpa_set_config_call(dev, fd); |
| 959 | return vhost_vdpa_call(dev, VHOST_VDPA_SET_CONFIG_CALL, &fd); |
| 960 | } |
| 961 | |
| 962 | static void vhost_vdpa_dump_config(struct vhost_dev *dev, const uint8_t *config, |
| 963 | uint32_t config_len) |
| 964 | { |
| 965 | g_autoptr(GString) str = g_string_sized_new(4 * 16); |
| 966 | size_t b, len; |
| 967 | |
| 968 | for (b = 0; b < config_len; b += len) { |
| 969 | len = MIN(config_len - b, 16); |
| 970 | |
| 971 | g_string_truncate(str, 0); |
| 972 | qemu_hexdump_line(str, config + b, len, 1, 4); |
| 973 | trace_vhost_vdpa_dump_config(dev, b, str->str); |
| 974 | } |
| 975 | } |
| 976 | |
| 977 | static int vhost_vdpa_set_config(struct vhost_dev *dev, const uint8_t *data, |
| 978 | uint32_t offset, uint32_t size, |
| 979 | uint32_t flags) |
| 980 | { |
| 981 | struct vhost_vdpa_config *config; |
| 982 | int ret; |
| 983 | unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); |
| 984 | |
| 985 | trace_vhost_vdpa_set_config(dev, offset, size, flags); |
| 986 | config = g_malloc(size + config_size); |
| 987 | config->off = offset; |
| 988 | config->len = size; |
| 989 | memcpy(config->buf, data, size); |
| 990 | if (trace_event_get_state_backends(TRACE_VHOST_VDPA_SET_CONFIG) && |
| 991 | trace_event_get_state_backends(TRACE_VHOST_VDPA_DUMP_CONFIG)) { |
| 992 | vhost_vdpa_dump_config(dev, data, size); |
| 993 | } |
| 994 | ret = vhost_vdpa_call(dev, VHOST_VDPA_SET_CONFIG, config); |
| 995 | g_free(config); |
| 996 | return ret; |
| 997 | } |
| 998 | |
| 999 | static int vhost_vdpa_get_config(struct vhost_dev *dev, uint8_t *config, |
| 1000 | uint32_t config_len, Error **errp) |
| 1001 | { |
| 1002 | struct vhost_vdpa_config *v_config; |
| 1003 | unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); |
| 1004 | int ret; |
| 1005 | |
| 1006 | trace_vhost_vdpa_get_config(dev, config, config_len); |
| 1007 | v_config = g_malloc(config_len + config_size); |
| 1008 | v_config->len = config_len; |
| 1009 | v_config->off = 0; |
| 1010 | ret = vhost_vdpa_call(dev, VHOST_VDPA_GET_CONFIG, v_config); |
| 1011 | memcpy(config, v_config->buf, config_len); |
| 1012 | g_free(v_config); |
| 1013 | if (trace_event_get_state_backends(TRACE_VHOST_VDPA_GET_CONFIG) && |
| 1014 | trace_event_get_state_backends(TRACE_VHOST_VDPA_DUMP_CONFIG)) { |
| 1015 | vhost_vdpa_dump_config(dev, config, config_len); |
| 1016 | } |
| 1017 | return ret; |
| 1018 | } |
| 1019 | |
| 1020 | static int vhost_vdpa_set_dev_vring_base(struct vhost_dev *dev, |
| 1021 | struct vhost_vring_state *ring) |
| 1022 | { |
| 1023 | struct vhost_vdpa *v = dev->opaque; |
| 1024 | |
| 1025 | trace_vhost_vdpa_set_dev_vring_base(dev, ring->index, ring->num, |
| 1026 | v->shadow_vqs_enabled); |
| 1027 | return vhost_vdpa_call(dev, VHOST_SET_VRING_BASE, ring); |
| 1028 | } |
| 1029 | |
| 1030 | static int vhost_vdpa_set_vring_dev_kick(struct vhost_dev *dev, |
| 1031 | struct vhost_vring_file *file) |
| 1032 | { |
| 1033 | trace_vhost_vdpa_set_vring_kick(dev, file->index, file->fd); |
| 1034 | return vhost_vdpa_call(dev, VHOST_SET_VRING_KICK, file); |
| 1035 | } |
| 1036 | |
| 1037 | static int vhost_vdpa_set_vring_dev_call(struct vhost_dev *dev, |
| 1038 | struct vhost_vring_file *file) |
| 1039 | { |
| 1040 | trace_vhost_vdpa_set_vring_call(dev, file->index, file->fd); |
| 1041 | return vhost_vdpa_call(dev, VHOST_SET_VRING_CALL, file); |
| 1042 | } |
| 1043 | |
| 1044 | static int vhost_vdpa_set_vring_dev_addr(struct vhost_dev *dev, |
| 1045 | struct vhost_vring_addr *addr) |
| 1046 | { |
| 1047 | trace_vhost_vdpa_set_vring_addr(dev, addr->index, addr->flags, |
| 1048 | addr->desc_user_addr, addr->used_user_addr, |
| 1049 | addr->avail_user_addr, |
| 1050 | addr->log_guest_addr); |
| 1051 | |
| 1052 | return vhost_vdpa_call(dev, VHOST_SET_VRING_ADDR, addr); |
| 1053 | |
| 1054 | } |
| 1055 | |
| 1056 | /** |
| 1057 | * Set the shadow virtqueue descriptors to the device |
| 1058 | * |
| 1059 | * @dev: The vhost device model |
| 1060 | * @svq: The shadow virtqueue |
| 1061 | * @idx: The index of the virtqueue in the vhost device |
| 1062 | * @errp: Error |
| 1063 | * |
| 1064 | * Note that this function does not rewind kick file descriptor if cannot set |
| 1065 | * call one. |
| 1066 | */ |
| 1067 | static int vhost_vdpa_svq_set_fds(struct vhost_dev *dev, |
| 1068 | VhostShadowVirtqueue *svq, unsigned idx, |
| 1069 | Error **errp) |
| 1070 | { |
| 1071 | struct vhost_vring_file file = { |
| 1072 | .index = dev->vq_index + idx, |
| 1073 | }; |
| 1074 | const EventNotifier *event_notifier = &svq->hdev_kick; |
| 1075 | int r; |
| 1076 | |
| 1077 | r = event_notifier_init(&svq->hdev_kick, 0); |
| 1078 | if (r < 0) { |
| 1079 | error_setg_errno(errp, -r, "Couldn't create kick event notifier"); |
| 1080 | goto err_init_hdev_kick; |
| 1081 | } |
| 1082 | |
| 1083 | r = event_notifier_init(&svq->hdev_call, 0); |
| 1084 | if (r < 0) { |
| 1085 | error_setg_errno(errp, -r, "Couldn't create call event notifier"); |
| 1086 | goto err_init_hdev_call; |
| 1087 | } |
| 1088 | |
| 1089 | file.fd = event_notifier_get_fd(event_notifier); |
| 1090 | r = vhost_vdpa_set_vring_dev_kick(dev, &file); |
| 1091 | if (unlikely(r != 0)) { |
| 1092 | error_setg_errno(errp, -r, "Can't set device kick fd"); |
| 1093 | goto err_init_set_dev_fd; |
| 1094 | } |
| 1095 | |
| 1096 | event_notifier = &svq->hdev_call; |
| 1097 | file.fd = event_notifier_get_fd(event_notifier); |
| 1098 | r = vhost_vdpa_set_vring_dev_call(dev, &file); |
| 1099 | if (unlikely(r != 0)) { |
| 1100 | error_setg_errno(errp, -r, "Can't set device call fd"); |
| 1101 | goto err_init_set_dev_fd; |
| 1102 | } |
| 1103 | |
| 1104 | return 0; |
| 1105 | |
| 1106 | err_init_set_dev_fd: |
| 1107 | event_notifier_set_handler(&svq->hdev_call, NULL); |
| 1108 | |
| 1109 | err_init_hdev_call: |
| 1110 | event_notifier_cleanup(&svq->hdev_kick); |
| 1111 | |
| 1112 | err_init_hdev_kick: |
| 1113 | return r; |
| 1114 | } |
| 1115 | |
| 1116 | /** |
| 1117 | * Unmap a SVQ area in the device |
| 1118 | */ |
| 1119 | static void vhost_vdpa_svq_unmap_ring(struct vhost_vdpa *v, hwaddr addr) |
| 1120 | { |
| 1121 | const DMAMap needle = { |
| 1122 | .translated_addr = addr, |
| 1123 | }; |
| 1124 | const DMAMap *result = vhost_iova_tree_find_iova(v->shared->iova_tree, |
| 1125 | &needle); |
| 1126 | hwaddr size; |
| 1127 | int r; |
| 1128 | |
| 1129 | if (unlikely(!result)) { |
| 1130 | error_report("Unable to find SVQ address to unmap"); |
| 1131 | return; |
| 1132 | } |
| 1133 | |
| 1134 | size = ROUND_UP(result->size, qemu_real_host_page_size()); |
| 1135 | r = vhost_vdpa_dma_unmap(v->shared, v->address_space_id, result->iova, |
| 1136 | size); |
| 1137 | if (unlikely(r < 0)) { |
| 1138 | error_report("Unable to unmap SVQ vring: %s (%d)", g_strerror(-r), -r); |
| 1139 | return; |
| 1140 | } |
| 1141 | |
| 1142 | vhost_iova_tree_remove(v->shared->iova_tree, *result); |
| 1143 | } |
| 1144 | |
| 1145 | static void vhost_vdpa_svq_unmap_rings(struct vhost_dev *dev, |
| 1146 | const VhostShadowVirtqueue *svq) |
| 1147 | { |
| 1148 | struct vhost_vdpa *v = dev->opaque; |
| 1149 | struct vhost_vring_addr svq_addr; |
| 1150 | |
| 1151 | vhost_svq_get_vring_addr(svq, &svq_addr); |
| 1152 | |
| 1153 | vhost_vdpa_svq_unmap_ring(v, svq_addr.desc_user_addr); |
| 1154 | |
| 1155 | vhost_vdpa_svq_unmap_ring(v, svq_addr.used_user_addr); |
| 1156 | } |
| 1157 | |
| 1158 | /** |
| 1159 | * Map the SVQ area in the device |
| 1160 | * |
| 1161 | * @v: Vhost-vdpa device |
| 1162 | * @needle: The area to search iova |
| 1163 | * @taddr: The translated address (HVA) |
| 1164 | * @errorp: Error pointer |
| 1165 | */ |
| 1166 | static bool vhost_vdpa_svq_map_ring(struct vhost_vdpa *v, DMAMap *needle, |
| 1167 | hwaddr taddr, Error **errp) |
| 1168 | { |
| 1169 | int r; |
| 1170 | |
| 1171 | r = vhost_iova_tree_map_alloc(v->shared->iova_tree, needle, taddr); |
| 1172 | if (unlikely(r != IOVA_OK)) { |
| 1173 | error_setg(errp, "Cannot allocate iova (%d)", r); |
| 1174 | |
| 1175 | if (needle->translated_addr == taddr) { |
| 1176 | error_append_hint(errp, "Insertion to IOVA->HVA tree failed"); |
| 1177 | /* Remove the mapping from the IOVA-only tree */ |
| 1178 | vhost_iova_tree_remove(v->shared->iova_tree, *needle); |
| 1179 | } |
| 1180 | return false; |
| 1181 | } |
| 1182 | |
| 1183 | r = vhost_vdpa_dma_map(v->shared, v->address_space_id, needle->iova, |
| 1184 | needle->size + 1, |
| 1185 | (void *)(uintptr_t)needle->translated_addr, |
| 1186 | needle->perm == IOMMU_RO); |
| 1187 | if (unlikely(r != 0)) { |
| 1188 | error_setg_errno(errp, -r, "Cannot map region to device"); |
| 1189 | vhost_iova_tree_remove(v->shared->iova_tree, *needle); |
| 1190 | } |
| 1191 | |
| 1192 | return r == 0; |
| 1193 | } |
| 1194 | |
| 1195 | /** |
| 1196 | * Map the shadow virtqueue rings in the device |
| 1197 | * |
| 1198 | * @dev: The vhost device |
| 1199 | * @svq: The shadow virtqueue |
| 1200 | * @addr: Assigned IOVA addresses |
| 1201 | * @errp: Error pointer |
| 1202 | */ |
| 1203 | static bool vhost_vdpa_svq_map_rings(struct vhost_dev *dev, |
| 1204 | const VhostShadowVirtqueue *svq, |
| 1205 | struct vhost_vring_addr *addr, |
| 1206 | Error **errp) |
| 1207 | { |
| 1208 | ERRP_GUARD(); |
| 1209 | DMAMap device_region, driver_region; |
| 1210 | struct vhost_vring_addr svq_addr; |
| 1211 | struct vhost_vdpa *v = dev->opaque; |
| 1212 | size_t device_size = vhost_svq_device_area_size(svq); |
| 1213 | size_t driver_size = vhost_svq_driver_area_size(svq); |
| 1214 | size_t avail_offset; |
| 1215 | bool ok; |
| 1216 | |
| 1217 | vhost_svq_get_vring_addr(svq, &svq_addr); |
| 1218 | |
| 1219 | driver_region = (DMAMap) { |
| 1220 | .size = driver_size - 1, |
| 1221 | .perm = IOMMU_RO, |
| 1222 | }; |
| 1223 | ok = vhost_vdpa_svq_map_ring(v, &driver_region, svq_addr.desc_user_addr, |
| 1224 | errp); |
| 1225 | if (unlikely(!ok)) { |
| 1226 | error_prepend(errp, "Cannot create vq driver region: "); |
| 1227 | return false; |
| 1228 | } |
| 1229 | addr->desc_user_addr = driver_region.iova; |
| 1230 | avail_offset = svq_addr.avail_user_addr - svq_addr.desc_user_addr; |
| 1231 | addr->avail_user_addr = driver_region.iova + avail_offset; |
| 1232 | |
| 1233 | device_region = (DMAMap) { |
| 1234 | .size = device_size - 1, |
| 1235 | .perm = IOMMU_RW, |
| 1236 | }; |
| 1237 | ok = vhost_vdpa_svq_map_ring(v, &device_region, svq_addr.used_user_addr, |
| 1238 | errp); |
| 1239 | if (unlikely(!ok)) { |
| 1240 | error_prepend(errp, "Cannot create vq device region: "); |
| 1241 | vhost_vdpa_svq_unmap_ring(v, driver_region.translated_addr); |
| 1242 | } |
| 1243 | addr->used_user_addr = device_region.iova; |
| 1244 | |
| 1245 | return ok; |
| 1246 | } |
| 1247 | |
| 1248 | static bool vhost_vdpa_svq_setup(struct vhost_dev *dev, |
| 1249 | VhostShadowVirtqueue *svq, unsigned idx, |
| 1250 | Error **errp) |
| 1251 | { |
| 1252 | uint16_t vq_index = dev->vq_index + idx; |
| 1253 | struct vhost_vring_state s = { |
| 1254 | .index = vq_index, |
| 1255 | }; |
| 1256 | int r; |
| 1257 | |
| 1258 | r = vhost_vdpa_set_dev_vring_base(dev, &s); |
| 1259 | if (unlikely(r)) { |
| 1260 | error_setg_errno(errp, -r, "Cannot set vring base"); |
| 1261 | return false; |
| 1262 | } |
| 1263 | |
| 1264 | r = vhost_vdpa_svq_set_fds(dev, svq, idx, errp); |
| 1265 | return r == 0; |
| 1266 | } |
| 1267 | |
| 1268 | static bool vhost_vdpa_svqs_start(struct vhost_dev *dev) |
| 1269 | { |
| 1270 | struct vhost_vdpa *v = dev->opaque; |
| 1271 | Error *err = NULL; |
| 1272 | unsigned i; |
| 1273 | |
| 1274 | if (!v->shadow_vqs_enabled) { |
| 1275 | return true; |
| 1276 | } |
| 1277 | |
| 1278 | for (i = 0; i < v->shadow_vqs->len; ++i) { |
| 1279 | VirtQueue *vq = virtio_get_queue(dev->vdev, dev->vq_index + i); |
| 1280 | VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs, i); |
| 1281 | struct vhost_vring_addr addr = { |
| 1282 | .index = dev->vq_index + i, |
| 1283 | }; |
| 1284 | int r; |
| 1285 | bool ok = vhost_vdpa_svq_setup(dev, svq, i, &err); |
| 1286 | if (unlikely(!ok)) { |
| 1287 | goto err; |
| 1288 | } |
| 1289 | |
| 1290 | vhost_svq_start(svq, dev->vdev, vq, v->shared->iova_tree); |
| 1291 | ok = vhost_vdpa_svq_map_rings(dev, svq, &addr, &err); |
| 1292 | if (unlikely(!ok)) { |
| 1293 | goto err_map; |
| 1294 | } |
| 1295 | |
| 1296 | /* Override vring GPA set by vhost subsystem */ |
| 1297 | r = vhost_vdpa_set_vring_dev_addr(dev, &addr); |
| 1298 | if (unlikely(r != 0)) { |
| 1299 | error_setg_errno(&err, -r, "Cannot set device address"); |
| 1300 | goto err_set_addr; |
| 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | return true; |
| 1305 | |
| 1306 | err_set_addr: |
| 1307 | vhost_vdpa_svq_unmap_rings(dev, g_ptr_array_index(v->shadow_vqs, i)); |
| 1308 | |
| 1309 | err_map: |
| 1310 | vhost_svq_stop(g_ptr_array_index(v->shadow_vqs, i)); |
| 1311 | |
| 1312 | err: |
| 1313 | error_reportf_err(err, "Cannot setup SVQ %u: ", i); |
| 1314 | for (unsigned j = 0; j < i; ++j) { |
| 1315 | VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs, j); |
| 1316 | vhost_vdpa_svq_unmap_rings(dev, svq); |
| 1317 | vhost_svq_stop(svq); |
| 1318 | } |
| 1319 | |
| 1320 | return false; |
| 1321 | } |
| 1322 | |
| 1323 | static void vhost_vdpa_svqs_stop(struct vhost_dev *dev) |
| 1324 | { |
| 1325 | struct vhost_vdpa *v = dev->opaque; |
| 1326 | |
| 1327 | if (!v->shadow_vqs_enabled) { |
| 1328 | return; |
| 1329 | } |
| 1330 | |
| 1331 | for (unsigned i = 0; i < v->shadow_vqs->len; ++i) { |
| 1332 | VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs, i); |
| 1333 | |
| 1334 | vhost_svq_stop(svq); |
| 1335 | vhost_vdpa_svq_unmap_rings(dev, svq); |
| 1336 | |
| 1337 | event_notifier_cleanup(&svq->hdev_kick); |
| 1338 | event_notifier_cleanup(&svq->hdev_call); |
| 1339 | } |
| 1340 | } |
| 1341 | |
| 1342 | static void vhost_vdpa_suspend(struct vhost_dev *dev) |
| 1343 | { |
| 1344 | struct vhost_vdpa *v = dev->opaque; |
| 1345 | int r; |
| 1346 | |
| 1347 | if (!vhost_vdpa_first_dev(dev)) { |
| 1348 | return; |
| 1349 | } |
| 1350 | |
| 1351 | if (dev->backend_cap & BIT_ULL(VHOST_BACKEND_F_SUSPEND)) { |
| 1352 | trace_vhost_vdpa_suspend(dev); |
| 1353 | r = ioctl(v->shared->device_fd, VHOST_VDPA_SUSPEND); |
| 1354 | if (unlikely(r)) { |
| 1355 | error_report("Cannot suspend: %s(%d)", g_strerror(errno), errno); |
| 1356 | } else { |
| 1357 | v->shared->suspended = true; |
| 1358 | return; |
| 1359 | } |
| 1360 | } |
| 1361 | |
| 1362 | vhost_vdpa_reset_device(dev); |
| 1363 | } |
| 1364 | |
| 1365 | static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started) |
| 1366 | { |
| 1367 | struct vhost_vdpa *v = dev->opaque; |
| 1368 | bool ok; |
| 1369 | trace_vhost_vdpa_dev_start(dev, started); |
| 1370 | |
| 1371 | if (started) { |
| 1372 | vhost_vdpa_host_notifiers_init(dev); |
| 1373 | ok = vhost_vdpa_svqs_start(dev); |
| 1374 | if (unlikely(!ok)) { |
| 1375 | return -1; |
| 1376 | } |
| 1377 | } else { |
| 1378 | vhost_vdpa_suspend(dev); |
| 1379 | vhost_vdpa_svqs_stop(dev); |
| 1380 | vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs); |
| 1381 | } |
| 1382 | |
| 1383 | if (!vhost_vdpa_last_dev(dev)) { |
| 1384 | return 0; |
| 1385 | } |
| 1386 | |
| 1387 | if (started) { |
| 1388 | if (vhost_dev_has_iommu(dev) && (v->shadow_vqs_enabled)) { |
| 1389 | error_report("SVQ can not work while IOMMU enable, please disable" |
| 1390 | "IOMMU and try again"); |
| 1391 | return -1; |
| 1392 | } |
| 1393 | if (v->shared->listener_registered && |
| 1394 | dev->vdev->dma_as != v->shared->listener.address_space) { |
| 1395 | memory_listener_unregister(&v->shared->listener); |
| 1396 | v->shared->listener_registered = false; |
| 1397 | } |
| 1398 | if (!v->shared->listener_registered) { |
| 1399 | memory_listener_register(&v->shared->listener, dev->vdev->dma_as); |
| 1400 | v->shared->listener_registered = true; |
| 1401 | } |
| 1402 | |
| 1403 | return vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK); |
| 1404 | } |
| 1405 | |
| 1406 | return 0; |
| 1407 | } |
| 1408 | |
| 1409 | static void vhost_vdpa_reset_status(struct vhost_dev *dev) |
| 1410 | { |
| 1411 | if (!vhost_vdpa_last_dev(dev)) { |
| 1412 | return; |
| 1413 | } |
| 1414 | |
| 1415 | vhost_vdpa_reset_device(dev); |
| 1416 | vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE | |
| 1417 | VIRTIO_CONFIG_S_DRIVER); |
| 1418 | } |
| 1419 | |
| 1420 | static int vhost_vdpa_set_log_base(struct vhost_dev *dev, uint64_t base, |
| 1421 | struct vhost_log *log) |
| 1422 | { |
| 1423 | struct vhost_vdpa *v = dev->opaque; |
| 1424 | if (v->shadow_vqs_enabled || !vhost_vdpa_first_dev(dev)) { |
| 1425 | return 0; |
| 1426 | } |
| 1427 | |
| 1428 | trace_vhost_vdpa_set_log_base(dev, base, log->size, log->refcnt, log->fd, |
| 1429 | log->log); |
| 1430 | return vhost_vdpa_call(dev, VHOST_SET_LOG_BASE, &base); |
| 1431 | } |
| 1432 | |
| 1433 | static int vhost_vdpa_set_vring_addr(struct vhost_dev *dev, |
| 1434 | struct vhost_vring_addr *addr) |
| 1435 | { |
| 1436 | struct vhost_vdpa *v = dev->opaque; |
| 1437 | |
| 1438 | if (v->shadow_vqs_enabled) { |
| 1439 | /* |
| 1440 | * Device vring addr was set at device start. SVQ base is handled by |
| 1441 | * VirtQueue code. |
| 1442 | */ |
| 1443 | return 0; |
| 1444 | } |
| 1445 | |
| 1446 | return vhost_vdpa_set_vring_dev_addr(dev, addr); |
| 1447 | } |
| 1448 | |
| 1449 | static int vhost_vdpa_set_vring_num(struct vhost_dev *dev, |
| 1450 | struct vhost_vring_state *ring) |
| 1451 | { |
| 1452 | trace_vhost_vdpa_set_vring_num(dev, ring->index, ring->num); |
| 1453 | return vhost_vdpa_call(dev, VHOST_SET_VRING_NUM, ring); |
| 1454 | } |
| 1455 | |
| 1456 | static int vhost_vdpa_set_vring_base(struct vhost_dev *dev, |
| 1457 | struct vhost_vring_state *ring) |
| 1458 | { |
| 1459 | struct vhost_vdpa *v = dev->opaque; |
| 1460 | |
| 1461 | if (v->shadow_vqs_enabled) { |
| 1462 | /* |
| 1463 | * Device vring base was set at device start. SVQ base is handled by |
| 1464 | * VirtQueue code. |
| 1465 | */ |
| 1466 | return 0; |
| 1467 | } |
| 1468 | |
| 1469 | return vhost_vdpa_set_dev_vring_base(dev, ring); |
| 1470 | } |
| 1471 | |
| 1472 | static int vhost_vdpa_get_vring_base(struct vhost_dev *dev, |
| 1473 | struct vhost_vring_state *ring) |
| 1474 | { |
| 1475 | struct vhost_vdpa *v = dev->opaque; |
| 1476 | int ret; |
| 1477 | |
| 1478 | if (v->shadow_vqs_enabled) { |
| 1479 | ring->num = virtio_queue_get_last_avail_idx(dev->vdev, ring->index); |
| 1480 | trace_vhost_vdpa_get_vring_base(dev, ring->index, ring->num, true); |
| 1481 | return 0; |
| 1482 | } |
| 1483 | |
| 1484 | if (!v->shared->suspended) { |
| 1485 | /* |
| 1486 | * Cannot trust in value returned by device, let vhost recover used |
| 1487 | * idx from guest. |
| 1488 | */ |
| 1489 | return -1; |
| 1490 | } |
| 1491 | |
| 1492 | ret = vhost_vdpa_call(dev, VHOST_GET_VRING_BASE, ring); |
| 1493 | trace_vhost_vdpa_get_vring_base(dev, ring->index, ring->num, false); |
| 1494 | return ret; |
| 1495 | } |
| 1496 | |
| 1497 | static int vhost_vdpa_set_vring_kick(struct vhost_dev *dev, |
| 1498 | struct vhost_vring_file *file) |
| 1499 | { |
| 1500 | struct vhost_vdpa *v = dev->opaque; |
| 1501 | int vdpa_idx = file->index - dev->vq_index; |
| 1502 | |
| 1503 | if (v->shadow_vqs_enabled) { |
| 1504 | VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs, vdpa_idx); |
| 1505 | vhost_svq_set_svq_kick_fd(svq, file->fd); |
| 1506 | return 0; |
| 1507 | } else { |
| 1508 | return vhost_vdpa_set_vring_dev_kick(dev, file); |
| 1509 | } |
| 1510 | } |
| 1511 | |
| 1512 | static int vhost_vdpa_set_vring_call(struct vhost_dev *dev, |
| 1513 | struct vhost_vring_file *file) |
| 1514 | { |
| 1515 | struct vhost_vdpa *v = dev->opaque; |
| 1516 | int vdpa_idx = file->index - dev->vq_index; |
| 1517 | VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs, vdpa_idx); |
| 1518 | |
| 1519 | /* Remember last call fd because we can switch to SVQ anytime. */ |
| 1520 | vhost_svq_set_svq_call_fd(svq, file->fd); |
| 1521 | /* |
| 1522 | * When SVQ is transitioning to off, shadow_vqs_enabled has |
| 1523 | * not been set back to false yet, but the underlying call fd |
| 1524 | * will have to switch back to the guest notifier to signal the |
| 1525 | * passthrough virtqueues. In other situations, SVQ's own call |
| 1526 | * fd shall be used to signal the device model. |
| 1527 | */ |
| 1528 | if (v->shadow_vqs_enabled && |
| 1529 | v->shared->svq_switching != SVQ_TSTATE_DISABLING) { |
| 1530 | return 0; |
| 1531 | } |
| 1532 | |
| 1533 | return vhost_vdpa_set_vring_dev_call(dev, file); |
| 1534 | } |
| 1535 | |
| 1536 | static int vhost_vdpa_get_features(struct vhost_dev *dev, |
| 1537 | uint64_t *features) |
| 1538 | { |
| 1539 | int ret = vhost_vdpa_get_dev_features(dev, features); |
| 1540 | |
| 1541 | if (ret == 0) { |
| 1542 | /* Add SVQ logging capabilities */ |
| 1543 | *features |= BIT_ULL(VHOST_F_LOG_ALL); |
| 1544 | } |
| 1545 | |
| 1546 | return ret; |
| 1547 | } |
| 1548 | |
| 1549 | static int vhost_vdpa_set_owner(struct vhost_dev *dev) |
| 1550 | { |
| 1551 | int r; |
| 1552 | struct vhost_vdpa *v; |
| 1553 | |
| 1554 | if (!vhost_vdpa_first_dev(dev)) { |
| 1555 | return 0; |
| 1556 | } |
| 1557 | |
| 1558 | trace_vhost_vdpa_set_owner(dev); |
| 1559 | r = vhost_vdpa_call(dev, VHOST_SET_OWNER, NULL); |
| 1560 | if (unlikely(r < 0)) { |
| 1561 | return r; |
| 1562 | } |
| 1563 | |
| 1564 | /* |
| 1565 | * Being optimistic and listening address space memory. If the device |
| 1566 | * uses vIOMMU, it is changed at vhost_vdpa_dev_start. |
| 1567 | */ |
| 1568 | v = dev->opaque; |
| 1569 | memory_listener_register(&v->shared->listener, &address_space_memory); |
| 1570 | v->shared->listener_registered = true; |
| 1571 | return 0; |
| 1572 | } |
| 1573 | |
| 1574 | static bool vhost_vdpa_phys_vring_addr(struct vhost_dev *dev) |
| 1575 | { |
| 1576 | return true; |
| 1577 | } |
| 1578 | |
| 1579 | static bool vhost_vdpa_force_iommu(struct vhost_dev *dev) |
| 1580 | { |
| 1581 | return true; |
| 1582 | } |
| 1583 | |
| 1584 | const VhostOps vdpa_ops = { |
| 1585 | .backend_type = VHOST_BACKEND_TYPE_VDPA, |
| 1586 | .vhost_init = vhost_vdpa_init, |
| 1587 | .vhost_cleanup = vhost_vdpa_cleanup, |
| 1588 | .vhost_set_log_base = vhost_vdpa_set_log_base, |
| 1589 | .vhost_set_vring_addr = vhost_vdpa_set_vring_addr, |
| 1590 | .vhost_set_vring_num = vhost_vdpa_set_vring_num, |
| 1591 | .vhost_set_vring_base = vhost_vdpa_set_vring_base, |
| 1592 | .vhost_get_vring_base = vhost_vdpa_get_vring_base, |
| 1593 | .vhost_set_vring_kick = vhost_vdpa_set_vring_kick, |
| 1594 | .vhost_set_vring_call = vhost_vdpa_set_vring_call, |
| 1595 | .vhost_get_features = vhost_vdpa_get_features, |
| 1596 | .vhost_set_owner = vhost_vdpa_set_owner, |
| 1597 | .vhost_set_vring_endian = NULL, |
| 1598 | .vhost_memslots_limit = vhost_vdpa_memslots_limit, |
| 1599 | .vhost_set_mem_table = vhost_vdpa_set_mem_table, |
| 1600 | .vhost_set_features = vhost_vdpa_set_features, |
| 1601 | .vhost_reset_device = vhost_vdpa_reset_device, |
| 1602 | .vhost_get_vq_index = vhost_vdpa_get_vq_index, |
| 1603 | .vhost_set_vring_enable = vhost_vdpa_set_vring_enable, |
| 1604 | .vhost_get_config = vhost_vdpa_get_config, |
| 1605 | .vhost_set_config = vhost_vdpa_set_config, |
| 1606 | .vhost_requires_shm_log = NULL, |
| 1607 | .vhost_migration_done = NULL, |
| 1608 | .vhost_net_set_mtu = NULL, |
| 1609 | .vhost_set_iotlb_callback = NULL, |
| 1610 | .vhost_send_device_iotlb_msg = NULL, |
| 1611 | .vhost_dev_start = vhost_vdpa_dev_start, |
| 1612 | .vhost_get_device_id = vhost_vdpa_get_device_id, |
| 1613 | .vhost_phys_vring_addr = vhost_vdpa_phys_vring_addr, |
| 1614 | .vhost_force_iommu = vhost_vdpa_force_iommu, |
| 1615 | .vhost_set_config_call = vhost_vdpa_set_config_call, |
| 1616 | .vhost_reset_status = vhost_vdpa_reset_status, |
| 1617 | }; |