1 /* 2 * generic functions used by VFIO devices 3 * 4 * Copyright Red Hat, Inc. 2012 5 * 6 * Authors: 7 * Alex Williamson <alex.williamson@redhat.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 * 12 * Based on qemu-kvm device-assignment: 13 * Adapted for KVM by Qumranet. 14 * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com) 15 * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com) 16 * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com) 17 * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com) 18 * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com) 19 */ 20 21 #include "qemu/osdep.h" 22 #include <sys/ioctl.h> 23 #ifdef CONFIG_KVM 24 #include <linux/kvm.h> 25 #endif 26 #include <linux/vfio.h> 27 28 #include "hw/vfio/vfio-common.h" 29 #include "hw/vfio/vfio.h" 30 #include "exec/address-spaces.h" 31 #include "exec/memory.h" 32 #include "hw/hw.h" 33 #include "qemu/error-report.h" 34 #include "qemu/range.h" 35 #include "sysemu/kvm.h" 36 #include "trace.h" 37 #include "qapi/error.h" 38 39 struct vfio_group_head vfio_group_list = 40 QLIST_HEAD_INITIALIZER(vfio_group_list); 41 struct vfio_as_head vfio_address_spaces = 42 QLIST_HEAD_INITIALIZER(vfio_address_spaces); 43 44 #ifdef CONFIG_KVM 45 /* 46 * We have a single VFIO pseudo device per KVM VM. Once created it lives 47 * for the life of the VM. Closing the file descriptor only drops our 48 * reference to it and the device's reference to kvm. Therefore once 49 * initialized, this file descriptor is only released on QEMU exit and 50 * we'll re-use it should another vfio device be attached before then. 51 */ 52 static int vfio_kvm_device_fd = -1; 53 #endif 54 55 /* 56 * Common VFIO interrupt disable 57 */ 58 void vfio_disable_irqindex(VFIODevice *vbasedev, int index) 59 { 60 struct vfio_irq_set irq_set = { 61 .argsz = sizeof(irq_set), 62 .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER, 63 .index = index, 64 .start = 0, 65 .count = 0, 66 }; 67 68 ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set); 69 } 70 71 void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index) 72 { 73 struct vfio_irq_set irq_set = { 74 .argsz = sizeof(irq_set), 75 .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_UNMASK, 76 .index = index, 77 .start = 0, 78 .count = 1, 79 }; 80 81 ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set); 82 } 83 84 void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index) 85 { 86 struct vfio_irq_set irq_set = { 87 .argsz = sizeof(irq_set), 88 .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_MASK, 89 .index = index, 90 .start = 0, 91 .count = 1, 92 }; 93 94 ioctl(vbasedev->fd, VFIO_DEVICE_SET_IRQS, &irq_set); 95 } 96 97 /* 98 * IO Port/MMIO - Beware of the endians, VFIO is always little endian 99 */ 100 void vfio_region_write(void *opaque, hwaddr addr, 101 uint64_t data, unsigned size) 102 { 103 VFIORegion *region = opaque; 104 VFIODevice *vbasedev = region->vbasedev; 105 union { 106 uint8_t byte; 107 uint16_t word; 108 uint32_t dword; 109 uint64_t qword; 110 } buf; 111 112 switch (size) { 113 case 1: 114 buf.byte = data; 115 break; 116 case 2: 117 buf.word = cpu_to_le16(data); 118 break; 119 case 4: 120 buf.dword = cpu_to_le32(data); 121 break; 122 default: 123 hw_error("vfio: unsupported write size, %d bytes", size); 124 break; 125 } 126 127 if (pwrite(vbasedev->fd, &buf, size, region->fd_offset + addr) != size) { 128 error_report("%s(%s:region%d+0x%"HWADDR_PRIx", 0x%"PRIx64 129 ",%d) failed: %m", 130 __func__, vbasedev->name, region->nr, 131 addr, data, size); 132 } 133 134 trace_vfio_region_write(vbasedev->name, region->nr, addr, data, size); 135 136 /* 137 * A read or write to a BAR always signals an INTx EOI. This will 138 * do nothing if not pending (including not in INTx mode). We assume 139 * that a BAR access is in response to an interrupt and that BAR 140 * accesses will service the interrupt. Unfortunately, we don't know 141 * which access will service the interrupt, so we're potentially 142 * getting quite a few host interrupts per guest interrupt. 143 */ 144 vbasedev->ops->vfio_eoi(vbasedev); 145 } 146 147 uint64_t vfio_region_read(void *opaque, 148 hwaddr addr, unsigned size) 149 { 150 VFIORegion *region = opaque; 151 VFIODevice *vbasedev = region->vbasedev; 152 union { 153 uint8_t byte; 154 uint16_t word; 155 uint32_t dword; 156 uint64_t qword; 157 } buf; 158 uint64_t data = 0; 159 160 if (pread(vbasedev->fd, &buf, size, region->fd_offset + addr) != size) { 161 error_report("%s(%s:region%d+0x%"HWADDR_PRIx", %d) failed: %m", 162 __func__, vbasedev->name, region->nr, 163 addr, size); 164 return (uint64_t)-1; 165 } 166 switch (size) { 167 case 1: 168 data = buf.byte; 169 break; 170 case 2: 171 data = le16_to_cpu(buf.word); 172 break; 173 case 4: 174 data = le32_to_cpu(buf.dword); 175 break; 176 default: 177 hw_error("vfio: unsupported read size, %d bytes", size); 178 break; 179 } 180 181 trace_vfio_region_read(vbasedev->name, region->nr, addr, size, data); 182 183 /* Same as write above */ 184 vbasedev->ops->vfio_eoi(vbasedev); 185 186 return data; 187 } 188 189 const MemoryRegionOps vfio_region_ops = { 190 .read = vfio_region_read, 191 .write = vfio_region_write, 192 .endianness = DEVICE_LITTLE_ENDIAN, 193 }; 194 195 /* 196 * DMA - Mapping and unmapping for the "type1" IOMMU interface used on x86 197 */ 198 static int vfio_dma_unmap(VFIOContainer *container, 199 hwaddr iova, ram_addr_t size) 200 { 201 struct vfio_iommu_type1_dma_unmap unmap = { 202 .argsz = sizeof(unmap), 203 .flags = 0, 204 .iova = iova, 205 .size = size, 206 }; 207 208 if (ioctl(container->fd, VFIO_IOMMU_UNMAP_DMA, &unmap)) { 209 error_report("VFIO_UNMAP_DMA: %d", -errno); 210 return -errno; 211 } 212 213 return 0; 214 } 215 216 static int vfio_dma_map(VFIOContainer *container, hwaddr iova, 217 ram_addr_t size, void *vaddr, bool readonly) 218 { 219 struct vfio_iommu_type1_dma_map map = { 220 .argsz = sizeof(map), 221 .flags = VFIO_DMA_MAP_FLAG_READ, 222 .vaddr = (__u64)(uintptr_t)vaddr, 223 .iova = iova, 224 .size = size, 225 }; 226 227 if (!readonly) { 228 map.flags |= VFIO_DMA_MAP_FLAG_WRITE; 229 } 230 231 /* 232 * Try the mapping, if it fails with EBUSY, unmap the region and try 233 * again. This shouldn't be necessary, but we sometimes see it in 234 * the VGA ROM space. 235 */ 236 if (ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0 || 237 (errno == EBUSY && vfio_dma_unmap(container, iova, size) == 0 && 238 ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0)) { 239 return 0; 240 } 241 242 error_report("VFIO_MAP_DMA: %d", -errno); 243 return -errno; 244 } 245 246 static void vfio_host_win_add(VFIOContainer *container, 247 hwaddr min_iova, hwaddr max_iova, 248 uint64_t iova_pgsizes) 249 { 250 VFIOHostDMAWindow *hostwin; 251 252 QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { 253 if (ranges_overlap(hostwin->min_iova, 254 hostwin->max_iova - hostwin->min_iova + 1, 255 min_iova, 256 max_iova - min_iova + 1)) { 257 hw_error("%s: Overlapped IOMMU are not enabled", __func__); 258 } 259 } 260 261 hostwin = g_malloc0(sizeof(*hostwin)); 262 263 hostwin->min_iova = min_iova; 264 hostwin->max_iova = max_iova; 265 hostwin->iova_pgsizes = iova_pgsizes; 266 QLIST_INSERT_HEAD(&container->hostwin_list, hostwin, hostwin_next); 267 } 268 269 static int vfio_host_win_del(VFIOContainer *container, hwaddr min_iova, 270 hwaddr max_iova) 271 { 272 VFIOHostDMAWindow *hostwin; 273 274 QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { 275 if (hostwin->min_iova == min_iova && hostwin->max_iova == max_iova) { 276 QLIST_REMOVE(hostwin, hostwin_next); 277 return 0; 278 } 279 } 280 281 return -1; 282 } 283 284 static bool vfio_listener_skipped_section(MemoryRegionSection *section) 285 { 286 return (!memory_region_is_ram(section->mr) && 287 !memory_region_is_iommu(section->mr)) || 288 /* 289 * Sizing an enabled 64-bit BAR can cause spurious mappings to 290 * addresses in the upper part of the 64-bit address space. These 291 * are never accessed by the CPU and beyond the address width of 292 * some IOMMU hardware. TODO: VFIO should tell us the IOMMU width. 293 */ 294 section->offset_within_address_space & (1ULL << 63); 295 } 296 297 static void vfio_iommu_map_notify(IOMMUNotifier *n, IOMMUTLBEntry *iotlb) 298 { 299 VFIOGuestIOMMU *giommu = container_of(n, VFIOGuestIOMMU, n); 300 VFIOContainer *container = giommu->container; 301 hwaddr iova = iotlb->iova + giommu->iommu_offset; 302 MemoryRegion *mr; 303 hwaddr xlat; 304 hwaddr len = iotlb->addr_mask + 1; 305 void *vaddr; 306 int ret; 307 308 trace_vfio_iommu_map_notify(iova, iova + iotlb->addr_mask); 309 310 if (iotlb->target_as != &address_space_memory) { 311 error_report("Wrong target AS \"%s\", only system memory is allowed", 312 iotlb->target_as->name ? iotlb->target_as->name : "none"); 313 return; 314 } 315 316 /* 317 * The IOMMU TLB entry we have just covers translation through 318 * this IOMMU to its immediate target. We need to translate 319 * it the rest of the way through to memory. 320 */ 321 rcu_read_lock(); 322 mr = address_space_translate(&address_space_memory, 323 iotlb->translated_addr, 324 &xlat, &len, iotlb->perm & IOMMU_WO); 325 if (!memory_region_is_ram(mr)) { 326 error_report("iommu map to non memory area %"HWADDR_PRIx"", 327 xlat); 328 goto out; 329 } 330 /* 331 * Translation truncates length to the IOMMU page size, 332 * check that it did not truncate too much. 333 */ 334 if (len & iotlb->addr_mask) { 335 error_report("iommu has granularity incompatible with target AS"); 336 goto out; 337 } 338 339 if ((iotlb->perm & IOMMU_RW) != IOMMU_NONE) { 340 vaddr = memory_region_get_ram_ptr(mr) + xlat; 341 ret = vfio_dma_map(container, iova, 342 iotlb->addr_mask + 1, vaddr, 343 !(iotlb->perm & IOMMU_WO) || mr->readonly); 344 if (ret) { 345 error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", " 346 "0x%"HWADDR_PRIx", %p) = %d (%m)", 347 container, iova, 348 iotlb->addr_mask + 1, vaddr, ret); 349 } 350 } else { 351 ret = vfio_dma_unmap(container, iova, iotlb->addr_mask + 1); 352 if (ret) { 353 error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", " 354 "0x%"HWADDR_PRIx") = %d (%m)", 355 container, iova, 356 iotlb->addr_mask + 1, ret); 357 } 358 } 359 out: 360 rcu_read_unlock(); 361 } 362 363 static void vfio_listener_region_add(MemoryListener *listener, 364 MemoryRegionSection *section) 365 { 366 VFIOContainer *container = container_of(listener, VFIOContainer, listener); 367 hwaddr iova, end; 368 Int128 llend, llsize; 369 void *vaddr; 370 int ret; 371 VFIOHostDMAWindow *hostwin; 372 bool hostwin_found; 373 374 if (vfio_listener_skipped_section(section)) { 375 trace_vfio_listener_region_add_skip( 376 section->offset_within_address_space, 377 section->offset_within_address_space + 378 int128_get64(int128_sub(section->size, int128_one()))); 379 return; 380 } 381 382 if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) != 383 (section->offset_within_region & ~TARGET_PAGE_MASK))) { 384 error_report("%s received unaligned region", __func__); 385 return; 386 } 387 388 iova = TARGET_PAGE_ALIGN(section->offset_within_address_space); 389 llend = int128_make64(section->offset_within_address_space); 390 llend = int128_add(llend, section->size); 391 llend = int128_and(llend, int128_exts64(TARGET_PAGE_MASK)); 392 393 if (int128_ge(int128_make64(iova), llend)) { 394 return; 395 } 396 end = int128_get64(int128_sub(llend, int128_one())); 397 398 if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) { 399 VFIOHostDMAWindow *hostwin; 400 hwaddr pgsize = 0; 401 402 /* For now intersections are not allowed, we may relax this later */ 403 QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { 404 if (ranges_overlap(hostwin->min_iova, 405 hostwin->max_iova - hostwin->min_iova + 1, 406 section->offset_within_address_space, 407 int128_get64(section->size))) { 408 ret = -1; 409 goto fail; 410 } 411 } 412 413 ret = vfio_spapr_create_window(container, section, &pgsize); 414 if (ret) { 415 goto fail; 416 } 417 418 vfio_host_win_add(container, section->offset_within_address_space, 419 section->offset_within_address_space + 420 int128_get64(section->size) - 1, pgsize); 421 } 422 423 hostwin_found = false; 424 QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) { 425 if (hostwin->min_iova <= iova && end <= hostwin->max_iova) { 426 hostwin_found = true; 427 break; 428 } 429 } 430 431 if (!hostwin_found) { 432 error_report("vfio: IOMMU container %p can't map guest IOVA region" 433 " 0x%"HWADDR_PRIx"..0x%"HWADDR_PRIx, 434 container, iova, end); 435 ret = -EFAULT; 436 goto fail; 437 } 438 439 memory_region_ref(section->mr); 440 441 if (memory_region_is_iommu(section->mr)) { 442 VFIOGuestIOMMU *giommu; 443 444 trace_vfio_listener_region_add_iommu(iova, end); 445 /* 446 * FIXME: For VFIO iommu types which have KVM acceleration to 447 * avoid bouncing all map/unmaps through qemu this way, this 448 * would be the right place to wire that up (tell the KVM 449 * device emulation the VFIO iommu handles to use). 450 */ 451 giommu = g_malloc0(sizeof(*giommu)); 452 giommu->iommu = section->mr; 453 giommu->iommu_offset = section->offset_within_address_space - 454 section->offset_within_region; 455 giommu->container = container; 456 giommu->n.notify = vfio_iommu_map_notify; 457 giommu->n.notifier_flags = IOMMU_NOTIFIER_ALL; 458 QLIST_INSERT_HEAD(&container->giommu_list, giommu, giommu_next); 459 460 memory_region_register_iommu_notifier(giommu->iommu, &giommu->n); 461 memory_region_iommu_replay(giommu->iommu, &giommu->n, false); 462 463 return; 464 } 465 466 /* Here we assume that memory_region_is_ram(section->mr)==true */ 467 468 vaddr = memory_region_get_ram_ptr(section->mr) + 469 section->offset_within_region + 470 (iova - section->offset_within_address_space); 471 472 trace_vfio_listener_region_add_ram(iova, end, vaddr); 473 474 llsize = int128_sub(llend, int128_make64(iova)); 475 476 ret = vfio_dma_map(container, iova, int128_get64(llsize), 477 vaddr, section->readonly); 478 if (ret) { 479 error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", " 480 "0x%"HWADDR_PRIx", %p) = %d (%m)", 481 container, iova, int128_get64(llsize), vaddr, ret); 482 goto fail; 483 } 484 485 return; 486 487 fail: 488 /* 489 * On the initfn path, store the first error in the container so we 490 * can gracefully fail. Runtime, there's not much we can do other 491 * than throw a hardware error. 492 */ 493 if (!container->initialized) { 494 if (!container->error) { 495 container->error = ret; 496 } 497 } else { 498 hw_error("vfio: DMA mapping failed, unable to continue"); 499 } 500 } 501 502 static void vfio_listener_region_del(MemoryListener *listener, 503 MemoryRegionSection *section) 504 { 505 VFIOContainer *container = container_of(listener, VFIOContainer, listener); 506 hwaddr iova, end; 507 Int128 llend, llsize; 508 int ret; 509 510 if (vfio_listener_skipped_section(section)) { 511 trace_vfio_listener_region_del_skip( 512 section->offset_within_address_space, 513 section->offset_within_address_space + 514 int128_get64(int128_sub(section->size, int128_one()))); 515 return; 516 } 517 518 if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) != 519 (section->offset_within_region & ~TARGET_PAGE_MASK))) { 520 error_report("%s received unaligned region", __func__); 521 return; 522 } 523 524 if (memory_region_is_iommu(section->mr)) { 525 VFIOGuestIOMMU *giommu; 526 527 QLIST_FOREACH(giommu, &container->giommu_list, giommu_next) { 528 if (giommu->iommu == section->mr) { 529 memory_region_unregister_iommu_notifier(giommu->iommu, 530 &giommu->n); 531 QLIST_REMOVE(giommu, giommu_next); 532 g_free(giommu); 533 break; 534 } 535 } 536 537 /* 538 * FIXME: We assume the one big unmap below is adequate to 539 * remove any individual page mappings in the IOMMU which 540 * might have been copied into VFIO. This works for a page table 541 * based IOMMU where a big unmap flattens a large range of IO-PTEs. 542 * That may not be true for all IOMMU types. 543 */ 544 } 545 546 iova = TARGET_PAGE_ALIGN(section->offset_within_address_space); 547 llend = int128_make64(section->offset_within_address_space); 548 llend = int128_add(llend, section->size); 549 llend = int128_and(llend, int128_exts64(TARGET_PAGE_MASK)); 550 551 if (int128_ge(int128_make64(iova), llend)) { 552 return; 553 } 554 end = int128_get64(int128_sub(llend, int128_one())); 555 556 llsize = int128_sub(llend, int128_make64(iova)); 557 558 trace_vfio_listener_region_del(iova, end); 559 560 ret = vfio_dma_unmap(container, iova, int128_get64(llsize)); 561 memory_region_unref(section->mr); 562 if (ret) { 563 error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", " 564 "0x%"HWADDR_PRIx") = %d (%m)", 565 container, iova, int128_get64(llsize), ret); 566 } 567 568 if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) { 569 vfio_spapr_remove_window(container, 570 section->offset_within_address_space); 571 if (vfio_host_win_del(container, 572 section->offset_within_address_space, 573 section->offset_within_address_space + 574 int128_get64(section->size) - 1) < 0) { 575 hw_error("%s: Cannot delete missing window at %"HWADDR_PRIx, 576 __func__, section->offset_within_address_space); 577 } 578 } 579 } 580 581 static const MemoryListener vfio_memory_listener = { 582 .region_add = vfio_listener_region_add, 583 .region_del = vfio_listener_region_del, 584 }; 585 586 static void vfio_listener_release(VFIOContainer *container) 587 { 588 memory_listener_unregister(&container->listener); 589 if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) { 590 memory_listener_unregister(&container->prereg_listener); 591 } 592 } 593 594 static struct vfio_info_cap_header * 595 vfio_get_region_info_cap(struct vfio_region_info *info, uint16_t id) 596 { 597 struct vfio_info_cap_header *hdr; 598 void *ptr = info; 599 600 if (!(info->flags & VFIO_REGION_INFO_FLAG_CAPS)) { 601 return NULL; 602 } 603 604 for (hdr = ptr + info->cap_offset; hdr != ptr; hdr = ptr + hdr->next) { 605 if (hdr->id == id) { 606 return hdr; 607 } 608 } 609 610 return NULL; 611 } 612 613 static int vfio_setup_region_sparse_mmaps(VFIORegion *region, 614 struct vfio_region_info *info) 615 { 616 struct vfio_info_cap_header *hdr; 617 struct vfio_region_info_cap_sparse_mmap *sparse; 618 int i, j; 619 620 hdr = vfio_get_region_info_cap(info, VFIO_REGION_INFO_CAP_SPARSE_MMAP); 621 if (!hdr) { 622 return -ENODEV; 623 } 624 625 sparse = container_of(hdr, struct vfio_region_info_cap_sparse_mmap, header); 626 627 trace_vfio_region_sparse_mmap_header(region->vbasedev->name, 628 region->nr, sparse->nr_areas); 629 630 region->mmaps = g_new0(VFIOMmap, sparse->nr_areas); 631 632 for (i = 0, j = 0; i < sparse->nr_areas; i++) { 633 trace_vfio_region_sparse_mmap_entry(i, sparse->areas[i].offset, 634 sparse->areas[i].offset + 635 sparse->areas[i].size); 636 637 if (sparse->areas[i].size) { 638 region->mmaps[j].offset = sparse->areas[i].offset; 639 region->mmaps[j].size = sparse->areas[i].size; 640 j++; 641 } 642 } 643 644 region->nr_mmaps = j; 645 region->mmaps = g_realloc(region->mmaps, j * sizeof(VFIOMmap)); 646 647 return 0; 648 } 649 650 int vfio_region_setup(Object *obj, VFIODevice *vbasedev, VFIORegion *region, 651 int index, const char *name) 652 { 653 struct vfio_region_info *info; 654 int ret; 655 656 ret = vfio_get_region_info(vbasedev, index, &info); 657 if (ret) { 658 return ret; 659 } 660 661 region->vbasedev = vbasedev; 662 region->flags = info->flags; 663 region->size = info->size; 664 region->fd_offset = info->offset; 665 region->nr = index; 666 667 if (region->size) { 668 region->mem = g_new0(MemoryRegion, 1); 669 memory_region_init_io(region->mem, obj, &vfio_region_ops, 670 region, name, region->size); 671 672 if (!vbasedev->no_mmap && 673 region->flags & VFIO_REGION_INFO_FLAG_MMAP) { 674 675 ret = vfio_setup_region_sparse_mmaps(region, info); 676 677 if (ret) { 678 region->nr_mmaps = 1; 679 region->mmaps = g_new0(VFIOMmap, region->nr_mmaps); 680 region->mmaps[0].offset = 0; 681 region->mmaps[0].size = region->size; 682 } 683 } 684 } 685 686 g_free(info); 687 688 trace_vfio_region_setup(vbasedev->name, index, name, 689 region->flags, region->fd_offset, region->size); 690 return 0; 691 } 692 693 int vfio_region_mmap(VFIORegion *region) 694 { 695 int i, prot = 0; 696 char *name; 697 698 if (!region->mem) { 699 return 0; 700 } 701 702 prot |= region->flags & VFIO_REGION_INFO_FLAG_READ ? PROT_READ : 0; 703 prot |= region->flags & VFIO_REGION_INFO_FLAG_WRITE ? PROT_WRITE : 0; 704 705 for (i = 0; i < region->nr_mmaps; i++) { 706 region->mmaps[i].mmap = mmap(NULL, region->mmaps[i].size, prot, 707 MAP_SHARED, region->vbasedev->fd, 708 region->fd_offset + 709 region->mmaps[i].offset); 710 if (region->mmaps[i].mmap == MAP_FAILED) { 711 int ret = -errno; 712 713 trace_vfio_region_mmap_fault(memory_region_name(region->mem), i, 714 region->fd_offset + 715 region->mmaps[i].offset, 716 region->fd_offset + 717 region->mmaps[i].offset + 718 region->mmaps[i].size - 1, ret); 719 720 region->mmaps[i].mmap = NULL; 721 722 for (i--; i >= 0; i--) { 723 memory_region_del_subregion(region->mem, ®ion->mmaps[i].mem); 724 munmap(region->mmaps[i].mmap, region->mmaps[i].size); 725 object_unparent(OBJECT(®ion->mmaps[i].mem)); 726 region->mmaps[i].mmap = NULL; 727 } 728 729 return ret; 730 } 731 732 name = g_strdup_printf("%s mmaps[%d]", 733 memory_region_name(region->mem), i); 734 memory_region_init_ram_device_ptr(®ion->mmaps[i].mem, 735 memory_region_owner(region->mem), 736 name, region->mmaps[i].size, 737 region->mmaps[i].mmap); 738 g_free(name); 739 memory_region_add_subregion(region->mem, region->mmaps[i].offset, 740 ®ion->mmaps[i].mem); 741 742 trace_vfio_region_mmap(memory_region_name(®ion->mmaps[i].mem), 743 region->mmaps[i].offset, 744 region->mmaps[i].offset + 745 region->mmaps[i].size - 1); 746 } 747 748 return 0; 749 } 750 751 void vfio_region_exit(VFIORegion *region) 752 { 753 int i; 754 755 if (!region->mem) { 756 return; 757 } 758 759 for (i = 0; i < region->nr_mmaps; i++) { 760 if (region->mmaps[i].mmap) { 761 memory_region_del_subregion(region->mem, ®ion->mmaps[i].mem); 762 } 763 } 764 765 trace_vfio_region_exit(region->vbasedev->name, region->nr); 766 } 767 768 void vfio_region_finalize(VFIORegion *region) 769 { 770 int i; 771 772 if (!region->mem) { 773 return; 774 } 775 776 for (i = 0; i < region->nr_mmaps; i++) { 777 if (region->mmaps[i].mmap) { 778 munmap(region->mmaps[i].mmap, region->mmaps[i].size); 779 object_unparent(OBJECT(®ion->mmaps[i].mem)); 780 } 781 } 782 783 object_unparent(OBJECT(region->mem)); 784 785 g_free(region->mem); 786 g_free(region->mmaps); 787 788 trace_vfio_region_finalize(region->vbasedev->name, region->nr); 789 } 790 791 void vfio_region_mmaps_set_enabled(VFIORegion *region, bool enabled) 792 { 793 int i; 794 795 if (!region->mem) { 796 return; 797 } 798 799 for (i = 0; i < region->nr_mmaps; i++) { 800 if (region->mmaps[i].mmap) { 801 memory_region_set_enabled(®ion->mmaps[i].mem, enabled); 802 } 803 } 804 805 trace_vfio_region_mmaps_set_enabled(memory_region_name(region->mem), 806 enabled); 807 } 808 809 void vfio_reset_handler(void *opaque) 810 { 811 VFIOGroup *group; 812 VFIODevice *vbasedev; 813 814 QLIST_FOREACH(group, &vfio_group_list, next) { 815 QLIST_FOREACH(vbasedev, &group->device_list, next) { 816 vbasedev->ops->vfio_compute_needs_reset(vbasedev); 817 } 818 } 819 820 QLIST_FOREACH(group, &vfio_group_list, next) { 821 QLIST_FOREACH(vbasedev, &group->device_list, next) { 822 if (vbasedev->needs_reset) { 823 vbasedev->ops->vfio_hot_reset_multi(vbasedev); 824 } 825 } 826 } 827 } 828 829 static void vfio_kvm_device_add_group(VFIOGroup *group) 830 { 831 #ifdef CONFIG_KVM 832 struct kvm_device_attr attr = { 833 .group = KVM_DEV_VFIO_GROUP, 834 .attr = KVM_DEV_VFIO_GROUP_ADD, 835 .addr = (uint64_t)(unsigned long)&group->fd, 836 }; 837 838 if (!kvm_enabled()) { 839 return; 840 } 841 842 if (vfio_kvm_device_fd < 0) { 843 struct kvm_create_device cd = { 844 .type = KVM_DEV_TYPE_VFIO, 845 }; 846 847 if (kvm_vm_ioctl(kvm_state, KVM_CREATE_DEVICE, &cd)) { 848 error_report("Failed to create KVM VFIO device: %m"); 849 return; 850 } 851 852 vfio_kvm_device_fd = cd.fd; 853 } 854 855 if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) { 856 error_report("Failed to add group %d to KVM VFIO device: %m", 857 group->groupid); 858 } 859 #endif 860 } 861 862 static void vfio_kvm_device_del_group(VFIOGroup *group) 863 { 864 #ifdef CONFIG_KVM 865 struct kvm_device_attr attr = { 866 .group = KVM_DEV_VFIO_GROUP, 867 .attr = KVM_DEV_VFIO_GROUP_DEL, 868 .addr = (uint64_t)(unsigned long)&group->fd, 869 }; 870 871 if (vfio_kvm_device_fd < 0) { 872 return; 873 } 874 875 if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) { 876 error_report("Failed to remove group %d from KVM VFIO device: %m", 877 group->groupid); 878 } 879 #endif 880 } 881 882 static VFIOAddressSpace *vfio_get_address_space(AddressSpace *as) 883 { 884 VFIOAddressSpace *space; 885 886 QLIST_FOREACH(space, &vfio_address_spaces, list) { 887 if (space->as == as) { 888 return space; 889 } 890 } 891 892 /* No suitable VFIOAddressSpace, create a new one */ 893 space = g_malloc0(sizeof(*space)); 894 space->as = as; 895 QLIST_INIT(&space->containers); 896 897 QLIST_INSERT_HEAD(&vfio_address_spaces, space, list); 898 899 return space; 900 } 901 902 static void vfio_put_address_space(VFIOAddressSpace *space) 903 { 904 if (QLIST_EMPTY(&space->containers)) { 905 QLIST_REMOVE(space, list); 906 g_free(space); 907 } 908 } 909 910 static int vfio_connect_container(VFIOGroup *group, AddressSpace *as, 911 Error **errp) 912 { 913 VFIOContainer *container; 914 int ret, fd; 915 VFIOAddressSpace *space; 916 917 space = vfio_get_address_space(as); 918 919 QLIST_FOREACH(container, &space->containers, next) { 920 if (!ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &container->fd)) { 921 group->container = container; 922 QLIST_INSERT_HEAD(&container->group_list, group, container_next); 923 return 0; 924 } 925 } 926 927 fd = qemu_open("/dev/vfio/vfio", O_RDWR); 928 if (fd < 0) { 929 error_setg_errno(errp, errno, "failed to open /dev/vfio/vfio"); 930 ret = -errno; 931 goto put_space_exit; 932 } 933 934 ret = ioctl(fd, VFIO_GET_API_VERSION); 935 if (ret != VFIO_API_VERSION) { 936 error_setg(errp, "supported vfio version: %d, " 937 "reported version: %d", VFIO_API_VERSION, ret); 938 ret = -EINVAL; 939 goto close_fd_exit; 940 } 941 942 container = g_malloc0(sizeof(*container)); 943 container->space = space; 944 container->fd = fd; 945 if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU) || 946 ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU)) { 947 bool v2 = !!ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU); 948 struct vfio_iommu_type1_info info; 949 950 ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd); 951 if (ret) { 952 error_setg_errno(errp, errno, "failed to set group container"); 953 ret = -errno; 954 goto free_container_exit; 955 } 956 957 container->iommu_type = v2 ? VFIO_TYPE1v2_IOMMU : VFIO_TYPE1_IOMMU; 958 ret = ioctl(fd, VFIO_SET_IOMMU, container->iommu_type); 959 if (ret) { 960 error_setg_errno(errp, errno, "failed to set iommu for container"); 961 ret = -errno; 962 goto free_container_exit; 963 } 964 965 /* 966 * FIXME: This assumes that a Type1 IOMMU can map any 64-bit 967 * IOVA whatsoever. That's not actually true, but the current 968 * kernel interface doesn't tell us what it can map, and the 969 * existing Type1 IOMMUs generally support any IOVA we're 970 * going to actually try in practice. 971 */ 972 info.argsz = sizeof(info); 973 ret = ioctl(fd, VFIO_IOMMU_GET_INFO, &info); 974 /* Ignore errors */ 975 if (ret || !(info.flags & VFIO_IOMMU_INFO_PGSIZES)) { 976 /* Assume 4k IOVA page size */ 977 info.iova_pgsizes = 4096; 978 } 979 vfio_host_win_add(container, 0, (hwaddr)-1, info.iova_pgsizes); 980 } else if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU) || 981 ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_v2_IOMMU)) { 982 struct vfio_iommu_spapr_tce_info info; 983 bool v2 = !!ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_v2_IOMMU); 984 985 ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd); 986 if (ret) { 987 error_setg_errno(errp, errno, "failed to set group container"); 988 ret = -errno; 989 goto free_container_exit; 990 } 991 container->iommu_type = 992 v2 ? VFIO_SPAPR_TCE_v2_IOMMU : VFIO_SPAPR_TCE_IOMMU; 993 ret = ioctl(fd, VFIO_SET_IOMMU, container->iommu_type); 994 if (ret) { 995 error_setg_errno(errp, errno, "failed to set iommu for container"); 996 ret = -errno; 997 goto free_container_exit; 998 } 999 1000 /* 1001 * The host kernel code implementing VFIO_IOMMU_DISABLE is called 1002 * when container fd is closed so we do not call it explicitly 1003 * in this file. 1004 */ 1005 if (!v2) { 1006 ret = ioctl(fd, VFIO_IOMMU_ENABLE); 1007 if (ret) { 1008 error_setg_errno(errp, errno, "failed to enable container"); 1009 ret = -errno; 1010 goto free_container_exit; 1011 } 1012 } else { 1013 container->prereg_listener = vfio_prereg_listener; 1014 1015 memory_listener_register(&container->prereg_listener, 1016 &address_space_memory); 1017 if (container->error) { 1018 memory_listener_unregister(&container->prereg_listener); 1019 ret = container->error; 1020 error_setg(errp, 1021 "RAM memory listener initialization failed for container"); 1022 goto free_container_exit; 1023 } 1024 } 1025 1026 info.argsz = sizeof(info); 1027 ret = ioctl(fd, VFIO_IOMMU_SPAPR_TCE_GET_INFO, &info); 1028 if (ret) { 1029 error_setg_errno(errp, errno, 1030 "VFIO_IOMMU_SPAPR_TCE_GET_INFO failed"); 1031 ret = -errno; 1032 if (v2) { 1033 memory_listener_unregister(&container->prereg_listener); 1034 } 1035 goto free_container_exit; 1036 } 1037 1038 if (v2) { 1039 /* 1040 * There is a default window in just created container. 1041 * To make region_add/del simpler, we better remove this 1042 * window now and let those iommu_listener callbacks 1043 * create/remove them when needed. 1044 */ 1045 ret = vfio_spapr_remove_window(container, info.dma32_window_start); 1046 if (ret) { 1047 error_setg_errno(errp, -ret, 1048 "failed to remove existing window"); 1049 goto free_container_exit; 1050 } 1051 } else { 1052 /* The default table uses 4K pages */ 1053 vfio_host_win_add(container, info.dma32_window_start, 1054 info.dma32_window_start + 1055 info.dma32_window_size - 1, 1056 0x1000); 1057 } 1058 } else { 1059 error_setg(errp, "No available IOMMU models"); 1060 ret = -EINVAL; 1061 goto free_container_exit; 1062 } 1063 1064 container->listener = vfio_memory_listener; 1065 1066 memory_listener_register(&container->listener, container->space->as); 1067 1068 if (container->error) { 1069 ret = container->error; 1070 error_setg_errno(errp, -ret, 1071 "memory listener initialization failed for container"); 1072 goto listener_release_exit; 1073 } 1074 1075 container->initialized = true; 1076 1077 QLIST_INIT(&container->group_list); 1078 QLIST_INSERT_HEAD(&space->containers, container, next); 1079 1080 group->container = container; 1081 QLIST_INSERT_HEAD(&container->group_list, group, container_next); 1082 1083 return 0; 1084 listener_release_exit: 1085 vfio_listener_release(container); 1086 1087 free_container_exit: 1088 g_free(container); 1089 1090 close_fd_exit: 1091 close(fd); 1092 1093 put_space_exit: 1094 vfio_put_address_space(space); 1095 1096 return ret; 1097 } 1098 1099 static void vfio_disconnect_container(VFIOGroup *group) 1100 { 1101 VFIOContainer *container = group->container; 1102 1103 if (ioctl(group->fd, VFIO_GROUP_UNSET_CONTAINER, &container->fd)) { 1104 error_report("vfio: error disconnecting group %d from container", 1105 group->groupid); 1106 } 1107 1108 QLIST_REMOVE(group, container_next); 1109 group->container = NULL; 1110 1111 if (QLIST_EMPTY(&container->group_list)) { 1112 VFIOAddressSpace *space = container->space; 1113 VFIOGuestIOMMU *giommu, *tmp; 1114 1115 vfio_listener_release(container); 1116 QLIST_REMOVE(container, next); 1117 1118 QLIST_FOREACH_SAFE(giommu, &container->giommu_list, giommu_next, tmp) { 1119 memory_region_unregister_iommu_notifier(giommu->iommu, &giommu->n); 1120 QLIST_REMOVE(giommu, giommu_next); 1121 g_free(giommu); 1122 } 1123 1124 trace_vfio_disconnect_container(container->fd); 1125 close(container->fd); 1126 g_free(container); 1127 1128 vfio_put_address_space(space); 1129 } 1130 } 1131 1132 VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp) 1133 { 1134 VFIOGroup *group; 1135 char path[32]; 1136 struct vfio_group_status status = { .argsz = sizeof(status) }; 1137 1138 QLIST_FOREACH(group, &vfio_group_list, next) { 1139 if (group->groupid == groupid) { 1140 /* Found it. Now is it already in the right context? */ 1141 if (group->container->space->as == as) { 1142 return group; 1143 } else { 1144 error_setg(errp, "group %d used in multiple address spaces", 1145 group->groupid); 1146 return NULL; 1147 } 1148 } 1149 } 1150 1151 group = g_malloc0(sizeof(*group)); 1152 1153 snprintf(path, sizeof(path), "/dev/vfio/%d", groupid); 1154 group->fd = qemu_open(path, O_RDWR); 1155 if (group->fd < 0) { 1156 error_setg_errno(errp, errno, "failed to open %s", path); 1157 goto free_group_exit; 1158 } 1159 1160 if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) { 1161 error_setg_errno(errp, errno, "failed to get group %d status", groupid); 1162 goto close_fd_exit; 1163 } 1164 1165 if (!(status.flags & VFIO_GROUP_FLAGS_VIABLE)) { 1166 error_setg(errp, "group %d is not viable", groupid); 1167 error_append_hint(errp, 1168 "Please ensure all devices within the iommu_group " 1169 "are bound to their vfio bus driver.\n"); 1170 goto close_fd_exit; 1171 } 1172 1173 group->groupid = groupid; 1174 QLIST_INIT(&group->device_list); 1175 1176 if (vfio_connect_container(group, as, errp)) { 1177 error_prepend(errp, "failed to setup container for group %d: ", 1178 groupid); 1179 goto close_fd_exit; 1180 } 1181 1182 if (QLIST_EMPTY(&vfio_group_list)) { 1183 qemu_register_reset(vfio_reset_handler, NULL); 1184 } 1185 1186 QLIST_INSERT_HEAD(&vfio_group_list, group, next); 1187 1188 vfio_kvm_device_add_group(group); 1189 1190 return group; 1191 1192 close_fd_exit: 1193 close(group->fd); 1194 1195 free_group_exit: 1196 g_free(group); 1197 1198 return NULL; 1199 } 1200 1201 void vfio_put_group(VFIOGroup *group) 1202 { 1203 if (!group || !QLIST_EMPTY(&group->device_list)) { 1204 return; 1205 } 1206 1207 vfio_kvm_device_del_group(group); 1208 vfio_disconnect_container(group); 1209 QLIST_REMOVE(group, next); 1210 trace_vfio_put_group(group->fd); 1211 close(group->fd); 1212 g_free(group); 1213 1214 if (QLIST_EMPTY(&vfio_group_list)) { 1215 qemu_unregister_reset(vfio_reset_handler, NULL); 1216 } 1217 } 1218 1219 int vfio_get_device(VFIOGroup *group, const char *name, 1220 VFIODevice *vbasedev, Error **errp) 1221 { 1222 struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) }; 1223 int ret, fd; 1224 1225 fd = ioctl(group->fd, VFIO_GROUP_GET_DEVICE_FD, name); 1226 if (fd < 0) { 1227 error_setg_errno(errp, errno, "error getting device from group %d", 1228 group->groupid); 1229 error_append_hint(errp, 1230 "Verify all devices in group %d are bound to vfio-<bus> " 1231 "or pci-stub and not already in use\n", group->groupid); 1232 return fd; 1233 } 1234 1235 ret = ioctl(fd, VFIO_DEVICE_GET_INFO, &dev_info); 1236 if (ret) { 1237 error_setg_errno(errp, errno, "error getting device info"); 1238 close(fd); 1239 return ret; 1240 } 1241 1242 vbasedev->fd = fd; 1243 vbasedev->group = group; 1244 QLIST_INSERT_HEAD(&group->device_list, vbasedev, next); 1245 1246 vbasedev->num_irqs = dev_info.num_irqs; 1247 vbasedev->num_regions = dev_info.num_regions; 1248 vbasedev->flags = dev_info.flags; 1249 1250 trace_vfio_get_device(name, dev_info.flags, dev_info.num_regions, 1251 dev_info.num_irqs); 1252 1253 vbasedev->reset_works = !!(dev_info.flags & VFIO_DEVICE_FLAGS_RESET); 1254 return 0; 1255 } 1256 1257 void vfio_put_base_device(VFIODevice *vbasedev) 1258 { 1259 if (!vbasedev->group) { 1260 return; 1261 } 1262 QLIST_REMOVE(vbasedev, next); 1263 vbasedev->group = NULL; 1264 trace_vfio_put_base_device(vbasedev->fd); 1265 close(vbasedev->fd); 1266 } 1267 1268 int vfio_get_region_info(VFIODevice *vbasedev, int index, 1269 struct vfio_region_info **info) 1270 { 1271 size_t argsz = sizeof(struct vfio_region_info); 1272 1273 *info = g_malloc0(argsz); 1274 1275 (*info)->index = index; 1276 retry: 1277 (*info)->argsz = argsz; 1278 1279 if (ioctl(vbasedev->fd, VFIO_DEVICE_GET_REGION_INFO, *info)) { 1280 g_free(*info); 1281 *info = NULL; 1282 return -errno; 1283 } 1284 1285 if ((*info)->argsz > argsz) { 1286 argsz = (*info)->argsz; 1287 *info = g_realloc(*info, argsz); 1288 1289 goto retry; 1290 } 1291 1292 return 0; 1293 } 1294 1295 int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type, 1296 uint32_t subtype, struct vfio_region_info **info) 1297 { 1298 int i; 1299 1300 for (i = 0; i < vbasedev->num_regions; i++) { 1301 struct vfio_info_cap_header *hdr; 1302 struct vfio_region_info_cap_type *cap_type; 1303 1304 if (vfio_get_region_info(vbasedev, i, info)) { 1305 continue; 1306 } 1307 1308 hdr = vfio_get_region_info_cap(*info, VFIO_REGION_INFO_CAP_TYPE); 1309 if (!hdr) { 1310 g_free(*info); 1311 continue; 1312 } 1313 1314 cap_type = container_of(hdr, struct vfio_region_info_cap_type, header); 1315 1316 trace_vfio_get_dev_region(vbasedev->name, i, 1317 cap_type->type, cap_type->subtype); 1318 1319 if (cap_type->type == type && cap_type->subtype == subtype) { 1320 return 0; 1321 } 1322 1323 g_free(*info); 1324 } 1325 1326 *info = NULL; 1327 return -ENODEV; 1328 } 1329 1330 /* 1331 * Interfaces for IBM EEH (Enhanced Error Handling) 1332 */ 1333 static bool vfio_eeh_container_ok(VFIOContainer *container) 1334 { 1335 /* 1336 * As of 2016-03-04 (linux-4.5) the host kernel EEH/VFIO 1337 * implementation is broken if there are multiple groups in a 1338 * container. The hardware works in units of Partitionable 1339 * Endpoints (== IOMMU groups) and the EEH operations naively 1340 * iterate across all groups in the container, without any logic 1341 * to make sure the groups have their state synchronized. For 1342 * certain operations (ENABLE) that might be ok, until an error 1343 * occurs, but for others (GET_STATE) it's clearly broken. 1344 */ 1345 1346 /* 1347 * XXX Once fixed kernels exist, test for them here 1348 */ 1349 1350 if (QLIST_EMPTY(&container->group_list)) { 1351 return false; 1352 } 1353 1354 if (QLIST_NEXT(QLIST_FIRST(&container->group_list), container_next)) { 1355 return false; 1356 } 1357 1358 return true; 1359 } 1360 1361 static int vfio_eeh_container_op(VFIOContainer *container, uint32_t op) 1362 { 1363 struct vfio_eeh_pe_op pe_op = { 1364 .argsz = sizeof(pe_op), 1365 .op = op, 1366 }; 1367 int ret; 1368 1369 if (!vfio_eeh_container_ok(container)) { 1370 error_report("vfio/eeh: EEH_PE_OP 0x%x: " 1371 "kernel requires a container with exactly one group", op); 1372 return -EPERM; 1373 } 1374 1375 ret = ioctl(container->fd, VFIO_EEH_PE_OP, &pe_op); 1376 if (ret < 0) { 1377 error_report("vfio/eeh: EEH_PE_OP 0x%x failed: %m", op); 1378 return -errno; 1379 } 1380 1381 return ret; 1382 } 1383 1384 static VFIOContainer *vfio_eeh_as_container(AddressSpace *as) 1385 { 1386 VFIOAddressSpace *space = vfio_get_address_space(as); 1387 VFIOContainer *container = NULL; 1388 1389 if (QLIST_EMPTY(&space->containers)) { 1390 /* No containers to act on */ 1391 goto out; 1392 } 1393 1394 container = QLIST_FIRST(&space->containers); 1395 1396 if (QLIST_NEXT(container, next)) { 1397 /* We don't yet have logic to synchronize EEH state across 1398 * multiple containers */ 1399 container = NULL; 1400 goto out; 1401 } 1402 1403 out: 1404 vfio_put_address_space(space); 1405 return container; 1406 } 1407 1408 bool vfio_eeh_as_ok(AddressSpace *as) 1409 { 1410 VFIOContainer *container = vfio_eeh_as_container(as); 1411 1412 return (container != NULL) && vfio_eeh_container_ok(container); 1413 } 1414 1415 int vfio_eeh_as_op(AddressSpace *as, uint32_t op) 1416 { 1417 VFIOContainer *container = vfio_eeh_as_container(as); 1418 1419 if (!container) { 1420 return -ENODEV; 1421 } 1422 return vfio_eeh_container_op(container, op); 1423 } 1424