1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES */ 3 #include <stdlib.h> 4 #include <sys/mman.h> 5 #include <sys/eventfd.h> 6 7 #define __EXPORTED_HEADERS__ 8 #include <linux/vfio.h> 9 10 #include "iommufd_utils.h" 11 12 static void *buffer; 13 14 static unsigned long PAGE_SIZE; 15 static unsigned long HUGEPAGE_SIZE; 16 17 #define MOCK_PAGE_SIZE (PAGE_SIZE / 2) 18 19 static unsigned long get_huge_page_size(void) 20 { 21 char buf[80]; 22 int ret; 23 int fd; 24 25 fd = open("/sys/kernel/mm/transparent_hugepage/hpage_pmd_size", 26 O_RDONLY); 27 if (fd < 0) 28 return 2 * 1024 * 1024; 29 30 ret = read(fd, buf, sizeof(buf)); 31 close(fd); 32 if (ret <= 0 || ret == sizeof(buf)) 33 return 2 * 1024 * 1024; 34 buf[ret] = 0; 35 return strtoul(buf, NULL, 10); 36 } 37 38 static __attribute__((constructor)) void setup_sizes(void) 39 { 40 void *vrc; 41 int rc; 42 43 PAGE_SIZE = sysconf(_SC_PAGE_SIZE); 44 HUGEPAGE_SIZE = get_huge_page_size(); 45 46 BUFFER_SIZE = PAGE_SIZE * 16; 47 rc = posix_memalign(&buffer, HUGEPAGE_SIZE, BUFFER_SIZE); 48 assert(!rc); 49 assert(buffer); 50 assert((uintptr_t)buffer % HUGEPAGE_SIZE == 0); 51 vrc = mmap(buffer, BUFFER_SIZE, PROT_READ | PROT_WRITE, 52 MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0); 53 assert(vrc == buffer); 54 } 55 56 FIXTURE(iommufd) 57 { 58 int fd; 59 }; 60 61 FIXTURE_SETUP(iommufd) 62 { 63 self->fd = open("/dev/iommu", O_RDWR); 64 ASSERT_NE(-1, self->fd); 65 } 66 67 FIXTURE_TEARDOWN(iommufd) 68 { 69 teardown_iommufd(self->fd, _metadata); 70 } 71 72 TEST_F(iommufd, simple_close) 73 { 74 } 75 76 TEST_F(iommufd, cmd_fail) 77 { 78 struct iommu_destroy cmd = { .size = sizeof(cmd), .id = 0 }; 79 80 /* object id is invalid */ 81 EXPECT_ERRNO(ENOENT, _test_ioctl_destroy(self->fd, 0)); 82 /* Bad pointer */ 83 EXPECT_ERRNO(EFAULT, ioctl(self->fd, IOMMU_DESTROY, NULL)); 84 /* Unknown ioctl */ 85 EXPECT_ERRNO(ENOTTY, 86 ioctl(self->fd, _IO(IOMMUFD_TYPE, IOMMUFD_CMD_BASE - 1), 87 &cmd)); 88 } 89 90 TEST_F(iommufd, cmd_length) 91 { 92 #define TEST_LENGTH(_struct, _ioctl) \ 93 { \ 94 struct { \ 95 struct _struct cmd; \ 96 uint8_t extra; \ 97 } cmd = { .cmd = { .size = sizeof(struct _struct) - 1 }, \ 98 .extra = UINT8_MAX }; \ 99 int old_errno; \ 100 int rc; \ 101 \ 102 EXPECT_ERRNO(EINVAL, ioctl(self->fd, _ioctl, &cmd)); \ 103 cmd.cmd.size = sizeof(struct _struct) + 1; \ 104 EXPECT_ERRNO(E2BIG, ioctl(self->fd, _ioctl, &cmd)); \ 105 cmd.cmd.size = sizeof(struct _struct); \ 106 rc = ioctl(self->fd, _ioctl, &cmd); \ 107 old_errno = errno; \ 108 cmd.cmd.size = sizeof(struct _struct) + 1; \ 109 cmd.extra = 0; \ 110 if (rc) { \ 111 EXPECT_ERRNO(old_errno, \ 112 ioctl(self->fd, _ioctl, &cmd)); \ 113 } else { \ 114 ASSERT_EQ(0, ioctl(self->fd, _ioctl, &cmd)); \ 115 } \ 116 } 117 118 TEST_LENGTH(iommu_destroy, IOMMU_DESTROY); 119 TEST_LENGTH(iommu_ioas_alloc, IOMMU_IOAS_ALLOC); 120 TEST_LENGTH(iommu_ioas_iova_ranges, IOMMU_IOAS_IOVA_RANGES); 121 TEST_LENGTH(iommu_ioas_allow_iovas, IOMMU_IOAS_ALLOW_IOVAS); 122 TEST_LENGTH(iommu_ioas_map, IOMMU_IOAS_MAP); 123 TEST_LENGTH(iommu_ioas_copy, IOMMU_IOAS_COPY); 124 TEST_LENGTH(iommu_ioas_unmap, IOMMU_IOAS_UNMAP); 125 TEST_LENGTH(iommu_option, IOMMU_OPTION); 126 TEST_LENGTH(iommu_vfio_ioas, IOMMU_VFIO_IOAS); 127 #undef TEST_LENGTH 128 } 129 130 TEST_F(iommufd, cmd_ex_fail) 131 { 132 struct { 133 struct iommu_destroy cmd; 134 __u64 future; 135 } cmd = { .cmd = { .size = sizeof(cmd), .id = 0 } }; 136 137 /* object id is invalid and command is longer */ 138 EXPECT_ERRNO(ENOENT, ioctl(self->fd, IOMMU_DESTROY, &cmd)); 139 /* future area is non-zero */ 140 cmd.future = 1; 141 EXPECT_ERRNO(E2BIG, ioctl(self->fd, IOMMU_DESTROY, &cmd)); 142 /* Original command "works" */ 143 cmd.cmd.size = sizeof(cmd.cmd); 144 EXPECT_ERRNO(ENOENT, ioctl(self->fd, IOMMU_DESTROY, &cmd)); 145 /* Short command fails */ 146 cmd.cmd.size = sizeof(cmd.cmd) - 1; 147 EXPECT_ERRNO(EINVAL, ioctl(self->fd, IOMMU_DESTROY, &cmd)); 148 } 149 150 TEST_F(iommufd, global_options) 151 { 152 struct iommu_option cmd = { 153 .size = sizeof(cmd), 154 .option_id = IOMMU_OPTION_RLIMIT_MODE, 155 .op = IOMMU_OPTION_OP_GET, 156 .val64 = 1, 157 }; 158 159 cmd.option_id = IOMMU_OPTION_RLIMIT_MODE; 160 ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd)); 161 ASSERT_EQ(0, cmd.val64); 162 163 /* This requires root */ 164 cmd.op = IOMMU_OPTION_OP_SET; 165 cmd.val64 = 1; 166 ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd)); 167 cmd.val64 = 2; 168 EXPECT_ERRNO(EINVAL, ioctl(self->fd, IOMMU_OPTION, &cmd)); 169 170 cmd.op = IOMMU_OPTION_OP_GET; 171 ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd)); 172 ASSERT_EQ(1, cmd.val64); 173 174 cmd.op = IOMMU_OPTION_OP_SET; 175 cmd.val64 = 0; 176 ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd)); 177 178 cmd.op = IOMMU_OPTION_OP_GET; 179 cmd.option_id = IOMMU_OPTION_HUGE_PAGES; 180 EXPECT_ERRNO(ENOENT, ioctl(self->fd, IOMMU_OPTION, &cmd)); 181 cmd.op = IOMMU_OPTION_OP_SET; 182 EXPECT_ERRNO(ENOENT, ioctl(self->fd, IOMMU_OPTION, &cmd)); 183 } 184 185 FIXTURE(iommufd_ioas) 186 { 187 int fd; 188 uint32_t ioas_id; 189 uint32_t domain_id; 190 uint64_t base_iova; 191 }; 192 193 FIXTURE_VARIANT(iommufd_ioas) 194 { 195 unsigned int mock_domains; 196 unsigned int memory_limit; 197 }; 198 199 FIXTURE_SETUP(iommufd_ioas) 200 { 201 unsigned int i; 202 203 204 self->fd = open("/dev/iommu", O_RDWR); 205 ASSERT_NE(-1, self->fd); 206 test_ioctl_ioas_alloc(&self->ioas_id); 207 208 if (!variant->memory_limit) { 209 test_ioctl_set_default_memory_limit(); 210 } else { 211 test_ioctl_set_temp_memory_limit(variant->memory_limit); 212 } 213 214 for (i = 0; i != variant->mock_domains; i++) { 215 test_cmd_mock_domain(self->ioas_id, NULL, &self->domain_id); 216 self->base_iova = MOCK_APERTURE_START; 217 } 218 } 219 220 FIXTURE_TEARDOWN(iommufd_ioas) 221 { 222 test_ioctl_set_default_memory_limit(); 223 teardown_iommufd(self->fd, _metadata); 224 } 225 226 FIXTURE_VARIANT_ADD(iommufd_ioas, no_domain) 227 { 228 }; 229 230 FIXTURE_VARIANT_ADD(iommufd_ioas, mock_domain) 231 { 232 .mock_domains = 1, 233 }; 234 235 FIXTURE_VARIANT_ADD(iommufd_ioas, two_mock_domain) 236 { 237 .mock_domains = 2, 238 }; 239 240 FIXTURE_VARIANT_ADD(iommufd_ioas, mock_domain_limit) 241 { 242 .mock_domains = 1, 243 .memory_limit = 16, 244 }; 245 246 TEST_F(iommufd_ioas, ioas_auto_destroy) 247 { 248 } 249 250 TEST_F(iommufd_ioas, ioas_destroy) 251 { 252 if (self->domain_id) { 253 /* IOAS cannot be freed while a domain is on it */ 254 EXPECT_ERRNO(EBUSY, 255 _test_ioctl_destroy(self->fd, self->ioas_id)); 256 } else { 257 /* Can allocate and manually free an IOAS table */ 258 test_ioctl_destroy(self->ioas_id); 259 } 260 } 261 262 TEST_F(iommufd_ioas, ioas_area_destroy) 263 { 264 /* Adding an area does not change ability to destroy */ 265 test_ioctl_ioas_map_fixed(buffer, PAGE_SIZE, self->base_iova); 266 if (self->domain_id) 267 EXPECT_ERRNO(EBUSY, 268 _test_ioctl_destroy(self->fd, self->ioas_id)); 269 else 270 test_ioctl_destroy(self->ioas_id); 271 } 272 273 TEST_F(iommufd_ioas, ioas_area_auto_destroy) 274 { 275 int i; 276 277 /* Can allocate and automatically free an IOAS table with many areas */ 278 for (i = 0; i != 10; i++) { 279 test_ioctl_ioas_map_fixed(buffer, PAGE_SIZE, 280 self->base_iova + i * PAGE_SIZE); 281 } 282 } 283 284 TEST_F(iommufd_ioas, area) 285 { 286 int i; 287 288 /* Unmap fails if nothing is mapped */ 289 for (i = 0; i != 10; i++) 290 test_err_ioctl_ioas_unmap(ENOENT, i * PAGE_SIZE, PAGE_SIZE); 291 292 /* Unmap works */ 293 for (i = 0; i != 10; i++) 294 test_ioctl_ioas_map_fixed(buffer, PAGE_SIZE, 295 self->base_iova + i * PAGE_SIZE); 296 for (i = 0; i != 10; i++) 297 test_ioctl_ioas_unmap(self->base_iova + i * PAGE_SIZE, 298 PAGE_SIZE); 299 300 /* Split fails */ 301 test_ioctl_ioas_map_fixed(buffer, PAGE_SIZE * 2, 302 self->base_iova + 16 * PAGE_SIZE); 303 test_err_ioctl_ioas_unmap(ENOENT, self->base_iova + 16 * PAGE_SIZE, 304 PAGE_SIZE); 305 test_err_ioctl_ioas_unmap(ENOENT, self->base_iova + 17 * PAGE_SIZE, 306 PAGE_SIZE); 307 308 /* Over map fails */ 309 test_err_ioctl_ioas_map_fixed(EEXIST, buffer, PAGE_SIZE * 2, 310 self->base_iova + 16 * PAGE_SIZE); 311 test_err_ioctl_ioas_map_fixed(EEXIST, buffer, PAGE_SIZE, 312 self->base_iova + 16 * PAGE_SIZE); 313 test_err_ioctl_ioas_map_fixed(EEXIST, buffer, PAGE_SIZE, 314 self->base_iova + 17 * PAGE_SIZE); 315 test_err_ioctl_ioas_map_fixed(EEXIST, buffer, PAGE_SIZE * 2, 316 self->base_iova + 15 * PAGE_SIZE); 317 test_err_ioctl_ioas_map_fixed(EEXIST, buffer, PAGE_SIZE * 3, 318 self->base_iova + 15 * PAGE_SIZE); 319 320 /* unmap all works */ 321 test_ioctl_ioas_unmap(0, UINT64_MAX); 322 323 /* Unmap all succeeds on an empty IOAS */ 324 test_ioctl_ioas_unmap(0, UINT64_MAX); 325 } 326 327 TEST_F(iommufd_ioas, unmap_fully_contained_areas) 328 { 329 uint64_t unmap_len; 330 int i; 331 332 /* Give no_domain some space to rewind base_iova */ 333 self->base_iova += 4 * PAGE_SIZE; 334 335 for (i = 0; i != 4; i++) 336 test_ioctl_ioas_map_fixed(buffer, 8 * PAGE_SIZE, 337 self->base_iova + i * 16 * PAGE_SIZE); 338 339 /* Unmap not fully contained area doesn't work */ 340 test_err_ioctl_ioas_unmap(ENOENT, self->base_iova - 4 * PAGE_SIZE, 341 8 * PAGE_SIZE); 342 test_err_ioctl_ioas_unmap(ENOENT, 343 self->base_iova + 3 * 16 * PAGE_SIZE + 344 8 * PAGE_SIZE - 4 * PAGE_SIZE, 345 8 * PAGE_SIZE); 346 347 /* Unmap fully contained areas works */ 348 ASSERT_EQ(0, _test_ioctl_ioas_unmap(self->fd, self->ioas_id, 349 self->base_iova - 4 * PAGE_SIZE, 350 3 * 16 * PAGE_SIZE + 8 * PAGE_SIZE + 351 4 * PAGE_SIZE, 352 &unmap_len)); 353 ASSERT_EQ(32 * PAGE_SIZE, unmap_len); 354 } 355 356 TEST_F(iommufd_ioas, area_auto_iova) 357 { 358 struct iommu_test_cmd test_cmd = { 359 .size = sizeof(test_cmd), 360 .op = IOMMU_TEST_OP_ADD_RESERVED, 361 .id = self->ioas_id, 362 .add_reserved = { .start = PAGE_SIZE * 4, 363 .length = PAGE_SIZE * 100 }, 364 }; 365 struct iommu_iova_range ranges[1] = {}; 366 struct iommu_ioas_allow_iovas allow_cmd = { 367 .size = sizeof(allow_cmd), 368 .ioas_id = self->ioas_id, 369 .num_iovas = 1, 370 .allowed_iovas = (uintptr_t)ranges, 371 }; 372 __u64 iovas[10]; 373 int i; 374 375 /* Simple 4k pages */ 376 for (i = 0; i != 10; i++) 377 test_ioctl_ioas_map(buffer, PAGE_SIZE, &iovas[i]); 378 for (i = 0; i != 10; i++) 379 test_ioctl_ioas_unmap(iovas[i], PAGE_SIZE); 380 381 /* Kernel automatically aligns IOVAs properly */ 382 for (i = 0; i != 10; i++) { 383 size_t length = PAGE_SIZE * (i + 1); 384 385 if (self->domain_id) { 386 test_ioctl_ioas_map(buffer, length, &iovas[i]); 387 } else { 388 test_ioctl_ioas_map((void *)(1UL << 31), length, 389 &iovas[i]); 390 } 391 EXPECT_EQ(0, iovas[i] % (1UL << (ffs(length) - 1))); 392 } 393 for (i = 0; i != 10; i++) 394 test_ioctl_ioas_unmap(iovas[i], PAGE_SIZE * (i + 1)); 395 396 /* Avoids a reserved region */ 397 ASSERT_EQ(0, 398 ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ADD_RESERVED), 399 &test_cmd)); 400 for (i = 0; i != 10; i++) { 401 size_t length = PAGE_SIZE * (i + 1); 402 403 test_ioctl_ioas_map(buffer, length, &iovas[i]); 404 EXPECT_EQ(0, iovas[i] % (1UL << (ffs(length) - 1))); 405 EXPECT_EQ(false, 406 iovas[i] > test_cmd.add_reserved.start && 407 iovas[i] < 408 test_cmd.add_reserved.start + 409 test_cmd.add_reserved.length); 410 } 411 for (i = 0; i != 10; i++) 412 test_ioctl_ioas_unmap(iovas[i], PAGE_SIZE * (i + 1)); 413 414 /* Allowed region intersects with a reserved region */ 415 ranges[0].start = PAGE_SIZE; 416 ranges[0].last = PAGE_SIZE * 600; 417 EXPECT_ERRNO(EADDRINUSE, 418 ioctl(self->fd, IOMMU_IOAS_ALLOW_IOVAS, &allow_cmd)); 419 420 /* Allocate from an allowed region */ 421 if (self->domain_id) { 422 ranges[0].start = MOCK_APERTURE_START + PAGE_SIZE; 423 ranges[0].last = MOCK_APERTURE_START + PAGE_SIZE * 600 - 1; 424 } else { 425 ranges[0].start = PAGE_SIZE * 200; 426 ranges[0].last = PAGE_SIZE * 600 - 1; 427 } 428 ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_ALLOW_IOVAS, &allow_cmd)); 429 for (i = 0; i != 10; i++) { 430 size_t length = PAGE_SIZE * (i + 1); 431 432 test_ioctl_ioas_map(buffer, length, &iovas[i]); 433 EXPECT_EQ(0, iovas[i] % (1UL << (ffs(length) - 1))); 434 EXPECT_EQ(true, iovas[i] >= ranges[0].start); 435 EXPECT_EQ(true, iovas[i] <= ranges[0].last); 436 EXPECT_EQ(true, iovas[i] + length > ranges[0].start); 437 EXPECT_EQ(true, iovas[i] + length <= ranges[0].last + 1); 438 } 439 for (i = 0; i != 10; i++) 440 test_ioctl_ioas_unmap(iovas[i], PAGE_SIZE * (i + 1)); 441 } 442 443 TEST_F(iommufd_ioas, area_allowed) 444 { 445 struct iommu_test_cmd test_cmd = { 446 .size = sizeof(test_cmd), 447 .op = IOMMU_TEST_OP_ADD_RESERVED, 448 .id = self->ioas_id, 449 .add_reserved = { .start = PAGE_SIZE * 4, 450 .length = PAGE_SIZE * 100 }, 451 }; 452 struct iommu_iova_range ranges[1] = {}; 453 struct iommu_ioas_allow_iovas allow_cmd = { 454 .size = sizeof(allow_cmd), 455 .ioas_id = self->ioas_id, 456 .num_iovas = 1, 457 .allowed_iovas = (uintptr_t)ranges, 458 }; 459 460 /* Reserved intersects an allowed */ 461 allow_cmd.num_iovas = 1; 462 ranges[0].start = self->base_iova; 463 ranges[0].last = ranges[0].start + PAGE_SIZE * 600; 464 ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_ALLOW_IOVAS, &allow_cmd)); 465 test_cmd.add_reserved.start = ranges[0].start + PAGE_SIZE; 466 test_cmd.add_reserved.length = PAGE_SIZE; 467 EXPECT_ERRNO(EADDRINUSE, 468 ioctl(self->fd, 469 _IOMMU_TEST_CMD(IOMMU_TEST_OP_ADD_RESERVED), 470 &test_cmd)); 471 allow_cmd.num_iovas = 0; 472 ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_ALLOW_IOVAS, &allow_cmd)); 473 474 /* Allowed intersects a reserved */ 475 ASSERT_EQ(0, 476 ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ADD_RESERVED), 477 &test_cmd)); 478 allow_cmd.num_iovas = 1; 479 ranges[0].start = self->base_iova; 480 ranges[0].last = ranges[0].start + PAGE_SIZE * 600; 481 EXPECT_ERRNO(EADDRINUSE, 482 ioctl(self->fd, IOMMU_IOAS_ALLOW_IOVAS, &allow_cmd)); 483 } 484 485 TEST_F(iommufd_ioas, copy_area) 486 { 487 struct iommu_ioas_copy copy_cmd = { 488 .size = sizeof(copy_cmd), 489 .flags = IOMMU_IOAS_MAP_FIXED_IOVA, 490 .dst_ioas_id = self->ioas_id, 491 .src_ioas_id = self->ioas_id, 492 .length = PAGE_SIZE, 493 }; 494 495 test_ioctl_ioas_map_fixed(buffer, PAGE_SIZE, self->base_iova); 496 497 /* Copy inside a single IOAS */ 498 copy_cmd.src_iova = self->base_iova; 499 copy_cmd.dst_iova = self->base_iova + PAGE_SIZE; 500 ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd)); 501 502 /* Copy between IOAS's */ 503 copy_cmd.src_iova = self->base_iova; 504 copy_cmd.dst_iova = 0; 505 test_ioctl_ioas_alloc(©_cmd.dst_ioas_id); 506 ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd)); 507 } 508 509 TEST_F(iommufd_ioas, iova_ranges) 510 { 511 struct iommu_test_cmd test_cmd = { 512 .size = sizeof(test_cmd), 513 .op = IOMMU_TEST_OP_ADD_RESERVED, 514 .id = self->ioas_id, 515 .add_reserved = { .start = PAGE_SIZE, .length = PAGE_SIZE }, 516 }; 517 struct iommu_iova_range *ranges = buffer; 518 struct iommu_ioas_iova_ranges ranges_cmd = { 519 .size = sizeof(ranges_cmd), 520 .ioas_id = self->ioas_id, 521 .num_iovas = BUFFER_SIZE / sizeof(*ranges), 522 .allowed_iovas = (uintptr_t)ranges, 523 }; 524 525 /* Range can be read */ 526 ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_IOVA_RANGES, &ranges_cmd)); 527 EXPECT_EQ(1, ranges_cmd.num_iovas); 528 if (!self->domain_id) { 529 EXPECT_EQ(0, ranges[0].start); 530 EXPECT_EQ(SIZE_MAX, ranges[0].last); 531 EXPECT_EQ(1, ranges_cmd.out_iova_alignment); 532 } else { 533 EXPECT_EQ(MOCK_APERTURE_START, ranges[0].start); 534 EXPECT_EQ(MOCK_APERTURE_LAST, ranges[0].last); 535 EXPECT_EQ(MOCK_PAGE_SIZE, ranges_cmd.out_iova_alignment); 536 } 537 538 /* Buffer too small */ 539 memset(ranges, 0, BUFFER_SIZE); 540 ranges_cmd.num_iovas = 0; 541 EXPECT_ERRNO(EMSGSIZE, 542 ioctl(self->fd, IOMMU_IOAS_IOVA_RANGES, &ranges_cmd)); 543 EXPECT_EQ(1, ranges_cmd.num_iovas); 544 EXPECT_EQ(0, ranges[0].start); 545 EXPECT_EQ(0, ranges[0].last); 546 547 /* 2 ranges */ 548 ASSERT_EQ(0, 549 ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ADD_RESERVED), 550 &test_cmd)); 551 ranges_cmd.num_iovas = BUFFER_SIZE / sizeof(*ranges); 552 ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_IOVA_RANGES, &ranges_cmd)); 553 if (!self->domain_id) { 554 EXPECT_EQ(2, ranges_cmd.num_iovas); 555 EXPECT_EQ(0, ranges[0].start); 556 EXPECT_EQ(PAGE_SIZE - 1, ranges[0].last); 557 EXPECT_EQ(PAGE_SIZE * 2, ranges[1].start); 558 EXPECT_EQ(SIZE_MAX, ranges[1].last); 559 } else { 560 EXPECT_EQ(1, ranges_cmd.num_iovas); 561 EXPECT_EQ(MOCK_APERTURE_START, ranges[0].start); 562 EXPECT_EQ(MOCK_APERTURE_LAST, ranges[0].last); 563 } 564 565 /* Buffer too small */ 566 memset(ranges, 0, BUFFER_SIZE); 567 ranges_cmd.num_iovas = 1; 568 if (!self->domain_id) { 569 EXPECT_ERRNO(EMSGSIZE, ioctl(self->fd, IOMMU_IOAS_IOVA_RANGES, 570 &ranges_cmd)); 571 EXPECT_EQ(2, ranges_cmd.num_iovas); 572 EXPECT_EQ(0, ranges[0].start); 573 EXPECT_EQ(PAGE_SIZE - 1, ranges[0].last); 574 } else { 575 ASSERT_EQ(0, 576 ioctl(self->fd, IOMMU_IOAS_IOVA_RANGES, &ranges_cmd)); 577 EXPECT_EQ(1, ranges_cmd.num_iovas); 578 EXPECT_EQ(MOCK_APERTURE_START, ranges[0].start); 579 EXPECT_EQ(MOCK_APERTURE_LAST, ranges[0].last); 580 } 581 EXPECT_EQ(0, ranges[1].start); 582 EXPECT_EQ(0, ranges[1].last); 583 } 584 585 TEST_F(iommufd_ioas, access_pin) 586 { 587 struct iommu_test_cmd access_cmd = { 588 .size = sizeof(access_cmd), 589 .op = IOMMU_TEST_OP_ACCESS_PAGES, 590 .access_pages = { .iova = MOCK_APERTURE_START, 591 .length = BUFFER_SIZE, 592 .uptr = (uintptr_t)buffer }, 593 }; 594 struct iommu_test_cmd check_map_cmd = { 595 .size = sizeof(check_map_cmd), 596 .op = IOMMU_TEST_OP_MD_CHECK_MAP, 597 .check_map = { .iova = MOCK_APERTURE_START, 598 .length = BUFFER_SIZE, 599 .uptr = (uintptr_t)buffer }, 600 }; 601 uint32_t access_pages_id; 602 unsigned int npages; 603 604 test_cmd_create_access(self->ioas_id, &access_cmd.id, 605 MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES); 606 607 for (npages = 1; npages < BUFFER_SIZE / PAGE_SIZE; npages++) { 608 uint32_t mock_device_id; 609 uint32_t mock_hwpt_id; 610 611 access_cmd.access_pages.length = npages * PAGE_SIZE; 612 613 /* Single map/unmap */ 614 test_ioctl_ioas_map_fixed(buffer, BUFFER_SIZE, 615 MOCK_APERTURE_START); 616 ASSERT_EQ(0, ioctl(self->fd, 617 _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES), 618 &access_cmd)); 619 test_cmd_destroy_access_pages( 620 access_cmd.id, 621 access_cmd.access_pages.out_access_pages_id); 622 623 /* Double user */ 624 ASSERT_EQ(0, ioctl(self->fd, 625 _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES), 626 &access_cmd)); 627 access_pages_id = access_cmd.access_pages.out_access_pages_id; 628 ASSERT_EQ(0, ioctl(self->fd, 629 _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES), 630 &access_cmd)); 631 test_cmd_destroy_access_pages( 632 access_cmd.id, 633 access_cmd.access_pages.out_access_pages_id); 634 test_cmd_destroy_access_pages(access_cmd.id, access_pages_id); 635 636 /* Add/remove a domain with a user */ 637 ASSERT_EQ(0, ioctl(self->fd, 638 _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES), 639 &access_cmd)); 640 test_cmd_mock_domain(self->ioas_id, &mock_device_id, 641 &mock_hwpt_id); 642 check_map_cmd.id = mock_hwpt_id; 643 ASSERT_EQ(0, ioctl(self->fd, 644 _IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_MAP), 645 &check_map_cmd)); 646 647 test_ioctl_destroy(mock_device_id); 648 test_ioctl_destroy(mock_hwpt_id); 649 test_cmd_destroy_access_pages( 650 access_cmd.id, 651 access_cmd.access_pages.out_access_pages_id); 652 653 test_ioctl_ioas_unmap(MOCK_APERTURE_START, BUFFER_SIZE); 654 } 655 test_cmd_destroy_access(access_cmd.id); 656 } 657 658 TEST_F(iommufd_ioas, access_pin_unmap) 659 { 660 struct iommu_test_cmd access_pages_cmd = { 661 .size = sizeof(access_pages_cmd), 662 .op = IOMMU_TEST_OP_ACCESS_PAGES, 663 .access_pages = { .iova = MOCK_APERTURE_START, 664 .length = BUFFER_SIZE, 665 .uptr = (uintptr_t)buffer }, 666 }; 667 668 test_cmd_create_access(self->ioas_id, &access_pages_cmd.id, 669 MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES); 670 test_ioctl_ioas_map_fixed(buffer, BUFFER_SIZE, MOCK_APERTURE_START); 671 ASSERT_EQ(0, 672 ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES), 673 &access_pages_cmd)); 674 675 /* Trigger the unmap op */ 676 test_ioctl_ioas_unmap(MOCK_APERTURE_START, BUFFER_SIZE); 677 678 /* kernel removed the item for us */ 679 test_err_destroy_access_pages( 680 ENOENT, access_pages_cmd.id, 681 access_pages_cmd.access_pages.out_access_pages_id); 682 } 683 684 static void check_access_rw(struct __test_metadata *_metadata, int fd, 685 unsigned int access_id, uint64_t iova, 686 unsigned int def_flags) 687 { 688 uint16_t tmp[32]; 689 struct iommu_test_cmd access_cmd = { 690 .size = sizeof(access_cmd), 691 .op = IOMMU_TEST_OP_ACCESS_RW, 692 .id = access_id, 693 .access_rw = { .uptr = (uintptr_t)tmp }, 694 }; 695 uint16_t *buffer16 = buffer; 696 unsigned int i; 697 void *tmp2; 698 699 for (i = 0; i != BUFFER_SIZE / sizeof(*buffer16); i++) 700 buffer16[i] = rand(); 701 702 for (access_cmd.access_rw.iova = iova + PAGE_SIZE - 50; 703 access_cmd.access_rw.iova < iova + PAGE_SIZE + 50; 704 access_cmd.access_rw.iova++) { 705 for (access_cmd.access_rw.length = 1; 706 access_cmd.access_rw.length < sizeof(tmp); 707 access_cmd.access_rw.length++) { 708 access_cmd.access_rw.flags = def_flags; 709 ASSERT_EQ(0, ioctl(fd, 710 _IOMMU_TEST_CMD( 711 IOMMU_TEST_OP_ACCESS_RW), 712 &access_cmd)); 713 ASSERT_EQ(0, 714 memcmp(buffer + (access_cmd.access_rw.iova - 715 iova), 716 tmp, access_cmd.access_rw.length)); 717 718 for (i = 0; i != ARRAY_SIZE(tmp); i++) 719 tmp[i] = rand(); 720 access_cmd.access_rw.flags = def_flags | 721 MOCK_ACCESS_RW_WRITE; 722 ASSERT_EQ(0, ioctl(fd, 723 _IOMMU_TEST_CMD( 724 IOMMU_TEST_OP_ACCESS_RW), 725 &access_cmd)); 726 ASSERT_EQ(0, 727 memcmp(buffer + (access_cmd.access_rw.iova - 728 iova), 729 tmp, access_cmd.access_rw.length)); 730 } 731 } 732 733 /* Multi-page test */ 734 tmp2 = malloc(BUFFER_SIZE); 735 ASSERT_NE(NULL, tmp2); 736 access_cmd.access_rw.iova = iova; 737 access_cmd.access_rw.length = BUFFER_SIZE; 738 access_cmd.access_rw.flags = def_flags; 739 access_cmd.access_rw.uptr = (uintptr_t)tmp2; 740 ASSERT_EQ(0, ioctl(fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_RW), 741 &access_cmd)); 742 ASSERT_EQ(0, memcmp(buffer, tmp2, access_cmd.access_rw.length)); 743 free(tmp2); 744 } 745 746 TEST_F(iommufd_ioas, access_rw) 747 { 748 __u32 access_id; 749 __u64 iova; 750 751 test_cmd_create_access(self->ioas_id, &access_id, 0); 752 test_ioctl_ioas_map(buffer, BUFFER_SIZE, &iova); 753 check_access_rw(_metadata, self->fd, access_id, iova, 0); 754 check_access_rw(_metadata, self->fd, access_id, iova, 755 MOCK_ACCESS_RW_SLOW_PATH); 756 test_ioctl_ioas_unmap(iova, BUFFER_SIZE); 757 test_cmd_destroy_access(access_id); 758 } 759 760 TEST_F(iommufd_ioas, access_rw_unaligned) 761 { 762 __u32 access_id; 763 __u64 iova; 764 765 test_cmd_create_access(self->ioas_id, &access_id, 0); 766 767 /* Unaligned pages */ 768 iova = self->base_iova + MOCK_PAGE_SIZE; 769 test_ioctl_ioas_map_fixed(buffer, BUFFER_SIZE, iova); 770 check_access_rw(_metadata, self->fd, access_id, iova, 0); 771 test_ioctl_ioas_unmap(iova, BUFFER_SIZE); 772 test_cmd_destroy_access(access_id); 773 } 774 775 TEST_F(iommufd_ioas, fork_gone) 776 { 777 __u32 access_id; 778 pid_t child; 779 780 test_cmd_create_access(self->ioas_id, &access_id, 0); 781 782 /* Create a mapping with a different mm */ 783 child = fork(); 784 if (!child) { 785 test_ioctl_ioas_map_fixed(buffer, BUFFER_SIZE, 786 MOCK_APERTURE_START); 787 exit(0); 788 } 789 ASSERT_NE(-1, child); 790 ASSERT_EQ(child, waitpid(child, NULL, 0)); 791 792 if (self->domain_id) { 793 /* 794 * If a domain already existed then everything was pinned within 795 * the fork, so this copies from one domain to another. 796 */ 797 test_cmd_mock_domain(self->ioas_id, NULL, NULL); 798 check_access_rw(_metadata, self->fd, access_id, 799 MOCK_APERTURE_START, 0); 800 801 } else { 802 /* 803 * Otherwise we need to actually pin pages which can't happen 804 * since the fork is gone. 805 */ 806 test_err_mock_domain(EFAULT, self->ioas_id, NULL, NULL); 807 } 808 809 test_cmd_destroy_access(access_id); 810 } 811 812 TEST_F(iommufd_ioas, fork_present) 813 { 814 __u32 access_id; 815 int pipefds[2]; 816 uint64_t tmp; 817 pid_t child; 818 int efd; 819 820 test_cmd_create_access(self->ioas_id, &access_id, 0); 821 822 ASSERT_EQ(0, pipe2(pipefds, O_CLOEXEC)); 823 efd = eventfd(0, EFD_CLOEXEC); 824 ASSERT_NE(-1, efd); 825 826 /* Create a mapping with a different mm */ 827 child = fork(); 828 if (!child) { 829 __u64 iova; 830 uint64_t one = 1; 831 832 close(pipefds[1]); 833 test_ioctl_ioas_map_fixed(buffer, BUFFER_SIZE, 834 MOCK_APERTURE_START); 835 if (write(efd, &one, sizeof(one)) != sizeof(one)) 836 exit(100); 837 if (read(pipefds[0], &iova, 1) != 1) 838 exit(100); 839 exit(0); 840 } 841 close(pipefds[0]); 842 ASSERT_NE(-1, child); 843 ASSERT_EQ(8, read(efd, &tmp, sizeof(tmp))); 844 845 /* Read pages from the remote process */ 846 test_cmd_mock_domain(self->ioas_id, NULL, NULL); 847 check_access_rw(_metadata, self->fd, access_id, MOCK_APERTURE_START, 0); 848 849 ASSERT_EQ(0, close(pipefds[1])); 850 ASSERT_EQ(child, waitpid(child, NULL, 0)); 851 852 test_cmd_destroy_access(access_id); 853 } 854 855 TEST_F(iommufd_ioas, ioas_option_huge_pages) 856 { 857 struct iommu_option cmd = { 858 .size = sizeof(cmd), 859 .option_id = IOMMU_OPTION_HUGE_PAGES, 860 .op = IOMMU_OPTION_OP_GET, 861 .val64 = 3, 862 .object_id = self->ioas_id, 863 }; 864 865 ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd)); 866 ASSERT_EQ(1, cmd.val64); 867 868 cmd.op = IOMMU_OPTION_OP_SET; 869 cmd.val64 = 0; 870 ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd)); 871 872 cmd.op = IOMMU_OPTION_OP_GET; 873 cmd.val64 = 3; 874 ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd)); 875 ASSERT_EQ(0, cmd.val64); 876 877 cmd.op = IOMMU_OPTION_OP_SET; 878 cmd.val64 = 2; 879 EXPECT_ERRNO(EINVAL, ioctl(self->fd, IOMMU_OPTION, &cmd)); 880 881 cmd.op = IOMMU_OPTION_OP_SET; 882 cmd.val64 = 1; 883 ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd)); 884 } 885 886 TEST_F(iommufd_ioas, ioas_iova_alloc) 887 { 888 unsigned int length; 889 __u64 iova; 890 891 for (length = 1; length != PAGE_SIZE * 2; length++) { 892 if (variant->mock_domains && (length % MOCK_PAGE_SIZE)) { 893 test_err_ioctl_ioas_map(EINVAL, buffer, length, &iova); 894 } else { 895 test_ioctl_ioas_map(buffer, length, &iova); 896 test_ioctl_ioas_unmap(iova, length); 897 } 898 } 899 } 900 901 TEST_F(iommufd_ioas, ioas_align_change) 902 { 903 struct iommu_option cmd = { 904 .size = sizeof(cmd), 905 .option_id = IOMMU_OPTION_HUGE_PAGES, 906 .op = IOMMU_OPTION_OP_SET, 907 .object_id = self->ioas_id, 908 /* 0 means everything must be aligned to PAGE_SIZE */ 909 .val64 = 0, 910 }; 911 912 /* 913 * We cannot upgrade the alignment using OPTION_HUGE_PAGES when a domain 914 * and map are present. 915 */ 916 if (variant->mock_domains) 917 return; 918 919 /* 920 * We can upgrade to PAGE_SIZE alignment when things are aligned right 921 */ 922 test_ioctl_ioas_map_fixed(buffer, PAGE_SIZE, MOCK_APERTURE_START); 923 ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd)); 924 925 /* Misalignment is rejected at map time */ 926 test_err_ioctl_ioas_map_fixed(EINVAL, buffer + MOCK_PAGE_SIZE, 927 PAGE_SIZE, 928 MOCK_APERTURE_START + PAGE_SIZE); 929 ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd)); 930 931 /* Reduce alignment */ 932 cmd.val64 = 1; 933 ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd)); 934 935 /* Confirm misalignment is rejected during alignment upgrade */ 936 test_ioctl_ioas_map_fixed(buffer + MOCK_PAGE_SIZE, PAGE_SIZE, 937 MOCK_APERTURE_START + PAGE_SIZE); 938 cmd.val64 = 0; 939 EXPECT_ERRNO(EADDRINUSE, ioctl(self->fd, IOMMU_OPTION, &cmd)); 940 941 test_ioctl_ioas_unmap(MOCK_APERTURE_START + PAGE_SIZE, PAGE_SIZE); 942 test_ioctl_ioas_unmap(MOCK_APERTURE_START, PAGE_SIZE); 943 } 944 945 TEST_F(iommufd_ioas, copy_sweep) 946 { 947 struct iommu_ioas_copy copy_cmd = { 948 .size = sizeof(copy_cmd), 949 .flags = IOMMU_IOAS_MAP_FIXED_IOVA, 950 .src_ioas_id = self->ioas_id, 951 .dst_iova = MOCK_APERTURE_START, 952 .length = MOCK_PAGE_SIZE, 953 }; 954 unsigned int dst_ioas_id; 955 uint64_t last_iova; 956 uint64_t iova; 957 958 test_ioctl_ioas_alloc(&dst_ioas_id); 959 copy_cmd.dst_ioas_id = dst_ioas_id; 960 961 if (variant->mock_domains) 962 last_iova = MOCK_APERTURE_START + BUFFER_SIZE - 1; 963 else 964 last_iova = MOCK_APERTURE_START + BUFFER_SIZE - 2; 965 966 test_ioctl_ioas_map_fixed(buffer, last_iova - MOCK_APERTURE_START + 1, 967 MOCK_APERTURE_START); 968 969 for (iova = MOCK_APERTURE_START - PAGE_SIZE; iova <= last_iova; 970 iova += 511) { 971 copy_cmd.src_iova = iova; 972 if (iova < MOCK_APERTURE_START || 973 iova + copy_cmd.length - 1 > last_iova) { 974 EXPECT_ERRNO(ENOENT, ioctl(self->fd, IOMMU_IOAS_COPY, 975 ©_cmd)); 976 } else { 977 ASSERT_EQ(0, 978 ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd)); 979 test_ioctl_ioas_unmap_id(dst_ioas_id, copy_cmd.dst_iova, 980 copy_cmd.length); 981 } 982 } 983 984 test_ioctl_destroy(dst_ioas_id); 985 } 986 987 FIXTURE(iommufd_mock_domain) 988 { 989 int fd; 990 uint32_t ioas_id; 991 uint32_t domain_id; 992 uint32_t domain_ids[2]; 993 int mmap_flags; 994 size_t mmap_buf_size; 995 }; 996 997 FIXTURE_VARIANT(iommufd_mock_domain) 998 { 999 unsigned int mock_domains; 1000 bool hugepages; 1001 }; 1002 1003 FIXTURE_SETUP(iommufd_mock_domain) 1004 { 1005 unsigned int i; 1006 1007 self->fd = open("/dev/iommu", O_RDWR); 1008 ASSERT_NE(-1, self->fd); 1009 test_ioctl_ioas_alloc(&self->ioas_id); 1010 1011 ASSERT_GE(ARRAY_SIZE(self->domain_ids), variant->mock_domains); 1012 1013 for (i = 0; i != variant->mock_domains; i++) 1014 test_cmd_mock_domain(self->ioas_id, NULL, &self->domain_ids[i]); 1015 self->domain_id = self->domain_ids[0]; 1016 1017 self->mmap_flags = MAP_SHARED | MAP_ANONYMOUS; 1018 self->mmap_buf_size = PAGE_SIZE * 8; 1019 if (variant->hugepages) { 1020 /* 1021 * MAP_POPULATE will cause the kernel to fail mmap if THPs are 1022 * not available. 1023 */ 1024 self->mmap_flags |= MAP_HUGETLB | MAP_POPULATE; 1025 self->mmap_buf_size = HUGEPAGE_SIZE * 2; 1026 } 1027 } 1028 1029 FIXTURE_TEARDOWN(iommufd_mock_domain) 1030 { 1031 teardown_iommufd(self->fd, _metadata); 1032 } 1033 1034 FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain) 1035 { 1036 .mock_domains = 1, 1037 .hugepages = false, 1038 }; 1039 1040 FIXTURE_VARIANT_ADD(iommufd_mock_domain, two_domains) 1041 { 1042 .mock_domains = 2, 1043 .hugepages = false, 1044 }; 1045 1046 FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain_hugepage) 1047 { 1048 .mock_domains = 1, 1049 .hugepages = true, 1050 }; 1051 1052 FIXTURE_VARIANT_ADD(iommufd_mock_domain, two_domains_hugepage) 1053 { 1054 .mock_domains = 2, 1055 .hugepages = true, 1056 }; 1057 1058 /* Have the kernel check that the user pages made it to the iommu_domain */ 1059 #define check_mock_iova(_ptr, _iova, _length) \ 1060 ({ \ 1061 struct iommu_test_cmd check_map_cmd = { \ 1062 .size = sizeof(check_map_cmd), \ 1063 .op = IOMMU_TEST_OP_MD_CHECK_MAP, \ 1064 .id = self->domain_id, \ 1065 .check_map = { .iova = _iova, \ 1066 .length = _length, \ 1067 .uptr = (uintptr_t)(_ptr) }, \ 1068 }; \ 1069 ASSERT_EQ(0, \ 1070 ioctl(self->fd, \ 1071 _IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_MAP), \ 1072 &check_map_cmd)); \ 1073 if (self->domain_ids[1]) { \ 1074 check_map_cmd.id = self->domain_ids[1]; \ 1075 ASSERT_EQ(0, \ 1076 ioctl(self->fd, \ 1077 _IOMMU_TEST_CMD( \ 1078 IOMMU_TEST_OP_MD_CHECK_MAP), \ 1079 &check_map_cmd)); \ 1080 } \ 1081 }) 1082 1083 TEST_F(iommufd_mock_domain, basic) 1084 { 1085 size_t buf_size = self->mmap_buf_size; 1086 uint8_t *buf; 1087 __u64 iova; 1088 1089 /* Simple one page map */ 1090 test_ioctl_ioas_map(buffer, PAGE_SIZE, &iova); 1091 check_mock_iova(buffer, iova, PAGE_SIZE); 1092 1093 buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, self->mmap_flags, -1, 1094 0); 1095 ASSERT_NE(MAP_FAILED, buf); 1096 1097 /* EFAULT half way through mapping */ 1098 ASSERT_EQ(0, munmap(buf + buf_size / 2, buf_size / 2)); 1099 test_err_ioctl_ioas_map(EFAULT, buf, buf_size, &iova); 1100 1101 /* EFAULT on first page */ 1102 ASSERT_EQ(0, munmap(buf, buf_size / 2)); 1103 test_err_ioctl_ioas_map(EFAULT, buf, buf_size, &iova); 1104 } 1105 1106 TEST_F(iommufd_mock_domain, ro_unshare) 1107 { 1108 uint8_t *buf; 1109 __u64 iova; 1110 int fd; 1111 1112 fd = open("/proc/self/exe", O_RDONLY); 1113 ASSERT_NE(-1, fd); 1114 1115 buf = mmap(0, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); 1116 ASSERT_NE(MAP_FAILED, buf); 1117 close(fd); 1118 1119 /* 1120 * There have been lots of changes to the "unshare" mechanism in 1121 * get_user_pages(), make sure it works right. The write to the page 1122 * after we map it for reading should not change the assigned PFN. 1123 */ 1124 ASSERT_EQ(0, 1125 _test_ioctl_ioas_map(self->fd, self->ioas_id, buf, PAGE_SIZE, 1126 &iova, IOMMU_IOAS_MAP_READABLE)); 1127 check_mock_iova(buf, iova, PAGE_SIZE); 1128 memset(buf, 1, PAGE_SIZE); 1129 check_mock_iova(buf, iova, PAGE_SIZE); 1130 ASSERT_EQ(0, munmap(buf, PAGE_SIZE)); 1131 } 1132 1133 TEST_F(iommufd_mock_domain, all_aligns) 1134 { 1135 size_t test_step = variant->hugepages ? (self->mmap_buf_size / 16) : 1136 MOCK_PAGE_SIZE; 1137 size_t buf_size = self->mmap_buf_size; 1138 unsigned int start; 1139 unsigned int end; 1140 uint8_t *buf; 1141 1142 buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, self->mmap_flags, -1, 1143 0); 1144 ASSERT_NE(MAP_FAILED, buf); 1145 check_refs(buf, buf_size, 0); 1146 1147 /* 1148 * Map every combination of page size and alignment within a big region, 1149 * less for hugepage case as it takes so long to finish. 1150 */ 1151 for (start = 0; start < buf_size; start += test_step) { 1152 if (variant->hugepages) 1153 end = buf_size; 1154 else 1155 end = start + MOCK_PAGE_SIZE; 1156 for (; end < buf_size; end += MOCK_PAGE_SIZE) { 1157 size_t length = end - start; 1158 __u64 iova; 1159 1160 test_ioctl_ioas_map(buf + start, length, &iova); 1161 check_mock_iova(buf + start, iova, length); 1162 check_refs(buf + start / PAGE_SIZE * PAGE_SIZE, 1163 end / PAGE_SIZE * PAGE_SIZE - 1164 start / PAGE_SIZE * PAGE_SIZE, 1165 1); 1166 1167 test_ioctl_ioas_unmap(iova, length); 1168 } 1169 } 1170 check_refs(buf, buf_size, 0); 1171 ASSERT_EQ(0, munmap(buf, buf_size)); 1172 } 1173 1174 TEST_F(iommufd_mock_domain, all_aligns_copy) 1175 { 1176 size_t test_step = variant->hugepages ? self->mmap_buf_size / 16 : 1177 MOCK_PAGE_SIZE; 1178 size_t buf_size = self->mmap_buf_size; 1179 unsigned int start; 1180 unsigned int end; 1181 uint8_t *buf; 1182 1183 buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, self->mmap_flags, -1, 1184 0); 1185 ASSERT_NE(MAP_FAILED, buf); 1186 check_refs(buf, buf_size, 0); 1187 1188 /* 1189 * Map every combination of page size and alignment within a big region, 1190 * less for hugepage case as it takes so long to finish. 1191 */ 1192 for (start = 0; start < buf_size; start += test_step) { 1193 if (variant->hugepages) 1194 end = buf_size; 1195 else 1196 end = start + MOCK_PAGE_SIZE; 1197 for (; end < buf_size; end += MOCK_PAGE_SIZE) { 1198 size_t length = end - start; 1199 unsigned int old_id; 1200 uint32_t mock_device_id; 1201 __u64 iova; 1202 1203 test_ioctl_ioas_map(buf + start, length, &iova); 1204 1205 /* Add and destroy a domain while the area exists */ 1206 old_id = self->domain_ids[1]; 1207 test_cmd_mock_domain(self->ioas_id, &mock_device_id, 1208 &self->domain_ids[1]); 1209 1210 check_mock_iova(buf + start, iova, length); 1211 check_refs(buf + start / PAGE_SIZE * PAGE_SIZE, 1212 end / PAGE_SIZE * PAGE_SIZE - 1213 start / PAGE_SIZE * PAGE_SIZE, 1214 1); 1215 1216 test_ioctl_destroy(mock_device_id); 1217 test_ioctl_destroy(self->domain_ids[1]); 1218 self->domain_ids[1] = old_id; 1219 1220 test_ioctl_ioas_unmap(iova, length); 1221 } 1222 } 1223 check_refs(buf, buf_size, 0); 1224 ASSERT_EQ(0, munmap(buf, buf_size)); 1225 } 1226 1227 TEST_F(iommufd_mock_domain, user_copy) 1228 { 1229 struct iommu_test_cmd access_cmd = { 1230 .size = sizeof(access_cmd), 1231 .op = IOMMU_TEST_OP_ACCESS_PAGES, 1232 .access_pages = { .length = BUFFER_SIZE, 1233 .uptr = (uintptr_t)buffer }, 1234 }; 1235 struct iommu_ioas_copy copy_cmd = { 1236 .size = sizeof(copy_cmd), 1237 .flags = IOMMU_IOAS_MAP_FIXED_IOVA, 1238 .dst_ioas_id = self->ioas_id, 1239 .dst_iova = MOCK_APERTURE_START, 1240 .length = BUFFER_SIZE, 1241 }; 1242 unsigned int ioas_id; 1243 1244 /* Pin the pages in an IOAS with no domains then copy to an IOAS with domains */ 1245 test_ioctl_ioas_alloc(&ioas_id); 1246 test_ioctl_ioas_map_id(ioas_id, buffer, BUFFER_SIZE, 1247 ©_cmd.src_iova); 1248 1249 test_cmd_create_access(ioas_id, &access_cmd.id, 1250 MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES); 1251 1252 access_cmd.access_pages.iova = copy_cmd.src_iova; 1253 ASSERT_EQ(0, 1254 ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES), 1255 &access_cmd)); 1256 copy_cmd.src_ioas_id = ioas_id; 1257 ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd)); 1258 check_mock_iova(buffer, MOCK_APERTURE_START, BUFFER_SIZE); 1259 1260 test_cmd_destroy_access_pages( 1261 access_cmd.id, access_cmd.access_pages.out_access_pages_id); 1262 test_cmd_destroy_access(access_cmd.id); 1263 1264 test_ioctl_destroy(ioas_id); 1265 } 1266 1267 /* VFIO compatibility IOCTLs */ 1268 1269 TEST_F(iommufd, simple_ioctls) 1270 { 1271 ASSERT_EQ(VFIO_API_VERSION, ioctl(self->fd, VFIO_GET_API_VERSION)); 1272 ASSERT_EQ(1, ioctl(self->fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU)); 1273 } 1274 1275 TEST_F(iommufd, unmap_cmd) 1276 { 1277 struct vfio_iommu_type1_dma_unmap unmap_cmd = { 1278 .iova = MOCK_APERTURE_START, 1279 .size = PAGE_SIZE, 1280 }; 1281 1282 unmap_cmd.argsz = 1; 1283 EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd)); 1284 1285 unmap_cmd.argsz = sizeof(unmap_cmd); 1286 unmap_cmd.flags = 1 << 31; 1287 EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd)); 1288 1289 unmap_cmd.flags = 0; 1290 EXPECT_ERRNO(ENODEV, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd)); 1291 } 1292 1293 TEST_F(iommufd, map_cmd) 1294 { 1295 struct vfio_iommu_type1_dma_map map_cmd = { 1296 .iova = MOCK_APERTURE_START, 1297 .size = PAGE_SIZE, 1298 .vaddr = (__u64)buffer, 1299 }; 1300 1301 map_cmd.argsz = 1; 1302 EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd)); 1303 1304 map_cmd.argsz = sizeof(map_cmd); 1305 map_cmd.flags = 1 << 31; 1306 EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd)); 1307 1308 /* Requires a domain to be attached */ 1309 map_cmd.flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE; 1310 EXPECT_ERRNO(ENODEV, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd)); 1311 } 1312 1313 TEST_F(iommufd, info_cmd) 1314 { 1315 struct vfio_iommu_type1_info info_cmd = {}; 1316 1317 /* Invalid argsz */ 1318 info_cmd.argsz = 1; 1319 EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_GET_INFO, &info_cmd)); 1320 1321 info_cmd.argsz = sizeof(info_cmd); 1322 EXPECT_ERRNO(ENODEV, ioctl(self->fd, VFIO_IOMMU_GET_INFO, &info_cmd)); 1323 } 1324 1325 TEST_F(iommufd, set_iommu_cmd) 1326 { 1327 /* Requires a domain to be attached */ 1328 EXPECT_ERRNO(ENODEV, 1329 ioctl(self->fd, VFIO_SET_IOMMU, VFIO_TYPE1v2_IOMMU)); 1330 EXPECT_ERRNO(ENODEV, ioctl(self->fd, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU)); 1331 } 1332 1333 TEST_F(iommufd, vfio_ioas) 1334 { 1335 struct iommu_vfio_ioas vfio_ioas_cmd = { 1336 .size = sizeof(vfio_ioas_cmd), 1337 .op = IOMMU_VFIO_IOAS_GET, 1338 }; 1339 __u32 ioas_id; 1340 1341 /* ENODEV if there is no compat ioas */ 1342 EXPECT_ERRNO(ENODEV, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd)); 1343 1344 /* Invalid id for set */ 1345 vfio_ioas_cmd.op = IOMMU_VFIO_IOAS_SET; 1346 EXPECT_ERRNO(ENOENT, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd)); 1347 1348 /* Valid id for set*/ 1349 test_ioctl_ioas_alloc(&ioas_id); 1350 vfio_ioas_cmd.ioas_id = ioas_id; 1351 ASSERT_EQ(0, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd)); 1352 1353 /* Same id comes back from get */ 1354 vfio_ioas_cmd.op = IOMMU_VFIO_IOAS_GET; 1355 ASSERT_EQ(0, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd)); 1356 ASSERT_EQ(ioas_id, vfio_ioas_cmd.ioas_id); 1357 1358 /* Clear works */ 1359 vfio_ioas_cmd.op = IOMMU_VFIO_IOAS_CLEAR; 1360 ASSERT_EQ(0, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd)); 1361 vfio_ioas_cmd.op = IOMMU_VFIO_IOAS_GET; 1362 EXPECT_ERRNO(ENODEV, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd)); 1363 } 1364 1365 FIXTURE(vfio_compat_mock_domain) 1366 { 1367 int fd; 1368 uint32_t ioas_id; 1369 }; 1370 1371 FIXTURE_VARIANT(vfio_compat_mock_domain) 1372 { 1373 unsigned int version; 1374 }; 1375 1376 FIXTURE_SETUP(vfio_compat_mock_domain) 1377 { 1378 struct iommu_vfio_ioas vfio_ioas_cmd = { 1379 .size = sizeof(vfio_ioas_cmd), 1380 .op = IOMMU_VFIO_IOAS_SET, 1381 }; 1382 1383 self->fd = open("/dev/iommu", O_RDWR); 1384 ASSERT_NE(-1, self->fd); 1385 1386 /* Create what VFIO would consider a group */ 1387 test_ioctl_ioas_alloc(&self->ioas_id); 1388 test_cmd_mock_domain(self->ioas_id, NULL, NULL); 1389 1390 /* Attach it to the vfio compat */ 1391 vfio_ioas_cmd.ioas_id = self->ioas_id; 1392 ASSERT_EQ(0, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd)); 1393 ASSERT_EQ(0, ioctl(self->fd, VFIO_SET_IOMMU, variant->version)); 1394 } 1395 1396 FIXTURE_TEARDOWN(vfio_compat_mock_domain) 1397 { 1398 teardown_iommufd(self->fd, _metadata); 1399 } 1400 1401 FIXTURE_VARIANT_ADD(vfio_compat_mock_domain, Ver1v2) 1402 { 1403 .version = VFIO_TYPE1v2_IOMMU, 1404 }; 1405 1406 FIXTURE_VARIANT_ADD(vfio_compat_mock_domain, Ver1v0) 1407 { 1408 .version = VFIO_TYPE1_IOMMU, 1409 }; 1410 1411 TEST_F(vfio_compat_mock_domain, simple_close) 1412 { 1413 } 1414 1415 TEST_F(vfio_compat_mock_domain, option_huge_pages) 1416 { 1417 struct iommu_option cmd = { 1418 .size = sizeof(cmd), 1419 .option_id = IOMMU_OPTION_HUGE_PAGES, 1420 .op = IOMMU_OPTION_OP_GET, 1421 .val64 = 3, 1422 .object_id = self->ioas_id, 1423 }; 1424 1425 ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd)); 1426 if (variant->version == VFIO_TYPE1_IOMMU) { 1427 ASSERT_EQ(0, cmd.val64); 1428 } else { 1429 ASSERT_EQ(1, cmd.val64); 1430 } 1431 } 1432 1433 /* 1434 * Execute an ioctl command stored in buffer and check that the result does not 1435 * overflow memory. 1436 */ 1437 static bool is_filled(const void *buf, uint8_t c, size_t len) 1438 { 1439 const uint8_t *cbuf = buf; 1440 1441 for (; len; cbuf++, len--) 1442 if (*cbuf != c) 1443 return false; 1444 return true; 1445 } 1446 1447 #define ioctl_check_buf(fd, cmd) \ 1448 ({ \ 1449 size_t _cmd_len = *(__u32 *)buffer; \ 1450 \ 1451 memset(buffer + _cmd_len, 0xAA, BUFFER_SIZE - _cmd_len); \ 1452 ASSERT_EQ(0, ioctl(fd, cmd, buffer)); \ 1453 ASSERT_EQ(true, is_filled(buffer + _cmd_len, 0xAA, \ 1454 BUFFER_SIZE - _cmd_len)); \ 1455 }) 1456 1457 static void check_vfio_info_cap_chain(struct __test_metadata *_metadata, 1458 struct vfio_iommu_type1_info *info_cmd) 1459 { 1460 const struct vfio_info_cap_header *cap; 1461 1462 ASSERT_GE(info_cmd->argsz, info_cmd->cap_offset + sizeof(*cap)); 1463 cap = buffer + info_cmd->cap_offset; 1464 while (true) { 1465 size_t cap_size; 1466 1467 if (cap->next) 1468 cap_size = (buffer + cap->next) - (void *)cap; 1469 else 1470 cap_size = (buffer + info_cmd->argsz) - (void *)cap; 1471 1472 switch (cap->id) { 1473 case VFIO_IOMMU_TYPE1_INFO_CAP_IOVA_RANGE: { 1474 struct vfio_iommu_type1_info_cap_iova_range *data = 1475 (void *)cap; 1476 1477 ASSERT_EQ(1, data->header.version); 1478 ASSERT_EQ(1, data->nr_iovas); 1479 EXPECT_EQ(MOCK_APERTURE_START, 1480 data->iova_ranges[0].start); 1481 EXPECT_EQ(MOCK_APERTURE_LAST, data->iova_ranges[0].end); 1482 break; 1483 } 1484 case VFIO_IOMMU_TYPE1_INFO_DMA_AVAIL: { 1485 struct vfio_iommu_type1_info_dma_avail *data = 1486 (void *)cap; 1487 1488 ASSERT_EQ(1, data->header.version); 1489 ASSERT_EQ(sizeof(*data), cap_size); 1490 break; 1491 } 1492 default: 1493 ASSERT_EQ(false, true); 1494 break; 1495 } 1496 if (!cap->next) 1497 break; 1498 1499 ASSERT_GE(info_cmd->argsz, cap->next + sizeof(*cap)); 1500 ASSERT_GE(buffer + cap->next, (void *)cap); 1501 cap = buffer + cap->next; 1502 } 1503 } 1504 1505 TEST_F(vfio_compat_mock_domain, get_info) 1506 { 1507 struct vfio_iommu_type1_info *info_cmd = buffer; 1508 unsigned int i; 1509 size_t caplen; 1510 1511 /* Pre-cap ABI */ 1512 *info_cmd = (struct vfio_iommu_type1_info){ 1513 .argsz = offsetof(struct vfio_iommu_type1_info, cap_offset), 1514 }; 1515 ioctl_check_buf(self->fd, VFIO_IOMMU_GET_INFO); 1516 ASSERT_NE(0, info_cmd->iova_pgsizes); 1517 ASSERT_EQ(VFIO_IOMMU_INFO_PGSIZES | VFIO_IOMMU_INFO_CAPS, 1518 info_cmd->flags); 1519 1520 /* Read the cap chain size */ 1521 *info_cmd = (struct vfio_iommu_type1_info){ 1522 .argsz = sizeof(*info_cmd), 1523 }; 1524 ioctl_check_buf(self->fd, VFIO_IOMMU_GET_INFO); 1525 ASSERT_NE(0, info_cmd->iova_pgsizes); 1526 ASSERT_EQ(VFIO_IOMMU_INFO_PGSIZES | VFIO_IOMMU_INFO_CAPS, 1527 info_cmd->flags); 1528 ASSERT_EQ(0, info_cmd->cap_offset); 1529 ASSERT_LT(sizeof(*info_cmd), info_cmd->argsz); 1530 1531 /* Read the caps, kernel should never create a corrupted caps */ 1532 caplen = info_cmd->argsz; 1533 for (i = sizeof(*info_cmd); i < caplen; i++) { 1534 *info_cmd = (struct vfio_iommu_type1_info){ 1535 .argsz = i, 1536 }; 1537 ioctl_check_buf(self->fd, VFIO_IOMMU_GET_INFO); 1538 ASSERT_EQ(VFIO_IOMMU_INFO_PGSIZES | VFIO_IOMMU_INFO_CAPS, 1539 info_cmd->flags); 1540 if (!info_cmd->cap_offset) 1541 continue; 1542 check_vfio_info_cap_chain(_metadata, info_cmd); 1543 } 1544 } 1545 1546 static void shuffle_array(unsigned long *array, size_t nelms) 1547 { 1548 unsigned int i; 1549 1550 /* Shuffle */ 1551 for (i = 0; i != nelms; i++) { 1552 unsigned long tmp = array[i]; 1553 unsigned int other = rand() % (nelms - i); 1554 1555 array[i] = array[other]; 1556 array[other] = tmp; 1557 } 1558 } 1559 1560 TEST_F(vfio_compat_mock_domain, map) 1561 { 1562 struct vfio_iommu_type1_dma_map map_cmd = { 1563 .argsz = sizeof(map_cmd), 1564 .flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE, 1565 .vaddr = (uintptr_t)buffer, 1566 .size = BUFFER_SIZE, 1567 .iova = MOCK_APERTURE_START, 1568 }; 1569 struct vfio_iommu_type1_dma_unmap unmap_cmd = { 1570 .argsz = sizeof(unmap_cmd), 1571 .size = BUFFER_SIZE, 1572 .iova = MOCK_APERTURE_START, 1573 }; 1574 unsigned long pages_iova[BUFFER_SIZE / PAGE_SIZE]; 1575 unsigned int i; 1576 1577 /* Simple map/unmap */ 1578 ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd)); 1579 ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd)); 1580 ASSERT_EQ(BUFFER_SIZE, unmap_cmd.size); 1581 1582 /* UNMAP_FLAG_ALL requres 0 iova/size */ 1583 ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd)); 1584 unmap_cmd.flags = VFIO_DMA_UNMAP_FLAG_ALL; 1585 EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd)); 1586 1587 unmap_cmd.iova = 0; 1588 unmap_cmd.size = 0; 1589 ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd)); 1590 ASSERT_EQ(BUFFER_SIZE, unmap_cmd.size); 1591 1592 /* Small pages */ 1593 for (i = 0; i != ARRAY_SIZE(pages_iova); i++) { 1594 map_cmd.iova = pages_iova[i] = 1595 MOCK_APERTURE_START + i * PAGE_SIZE; 1596 map_cmd.vaddr = (uintptr_t)buffer + i * PAGE_SIZE; 1597 map_cmd.size = PAGE_SIZE; 1598 ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd)); 1599 } 1600 shuffle_array(pages_iova, ARRAY_SIZE(pages_iova)); 1601 1602 unmap_cmd.flags = 0; 1603 unmap_cmd.size = PAGE_SIZE; 1604 for (i = 0; i != ARRAY_SIZE(pages_iova); i++) { 1605 unmap_cmd.iova = pages_iova[i]; 1606 ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd)); 1607 } 1608 } 1609 1610 TEST_F(vfio_compat_mock_domain, huge_map) 1611 { 1612 size_t buf_size = HUGEPAGE_SIZE * 2; 1613 struct vfio_iommu_type1_dma_map map_cmd = { 1614 .argsz = sizeof(map_cmd), 1615 .flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE, 1616 .size = buf_size, 1617 .iova = MOCK_APERTURE_START, 1618 }; 1619 struct vfio_iommu_type1_dma_unmap unmap_cmd = { 1620 .argsz = sizeof(unmap_cmd), 1621 }; 1622 unsigned long pages_iova[16]; 1623 unsigned int i; 1624 void *buf; 1625 1626 /* Test huge pages and splitting */ 1627 buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, 1628 MAP_SHARED | MAP_ANONYMOUS | MAP_HUGETLB | MAP_POPULATE, -1, 1629 0); 1630 ASSERT_NE(MAP_FAILED, buf); 1631 map_cmd.vaddr = (uintptr_t)buf; 1632 ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd)); 1633 1634 unmap_cmd.size = buf_size / ARRAY_SIZE(pages_iova); 1635 for (i = 0; i != ARRAY_SIZE(pages_iova); i++) 1636 pages_iova[i] = MOCK_APERTURE_START + (i * unmap_cmd.size); 1637 shuffle_array(pages_iova, ARRAY_SIZE(pages_iova)); 1638 1639 /* type1 mode can cut up larger mappings, type1v2 always fails */ 1640 for (i = 0; i != ARRAY_SIZE(pages_iova); i++) { 1641 unmap_cmd.iova = pages_iova[i]; 1642 unmap_cmd.size = buf_size / ARRAY_SIZE(pages_iova); 1643 if (variant->version == VFIO_TYPE1_IOMMU) { 1644 ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, 1645 &unmap_cmd)); 1646 } else { 1647 EXPECT_ERRNO(ENOENT, 1648 ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, 1649 &unmap_cmd)); 1650 } 1651 } 1652 } 1653 1654 TEST_HARNESS_MAIN 1655