lib/eal/linux/eal.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2018 Intel Corporation.
   3  * Copyright(c) 2012-2014 6WIND S.A.
   4  */
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <stdint.h>
   9 #include <string.h>
  10 #include <unistd.h>
  11 #include <pthread.h>
  12 #include <getopt.h>
  13 #include <sys/file.h>
  14 #include <dirent.h>
  15 #include <fcntl.h>
  16 #include <fnmatch.h>
  17 #include <stddef.h>
  18 #include <errno.h>
  19 #include <limits.h>
  20 #include <sys/mman.h>
  21 #include <sys/stat.h>
  22 #if defined(RTE_ARCH_X86)
  23 #include <sys/io.h>
  24 #endif
  25 #include <linux/version.h>
  26
  27 #include <rte_common.h>
  28 #include <rte_debug.h>
  29 #include <rte_memory.h>
  30 #include <rte_launch.h>
  31 #include <rte_eal.h>
  32 #include <rte_errno.h>
  33 #include <rte_lcore.h>
  34 #include <rte_service_component.h>
  35 #include <rte_log.h>
  36 #include <rte_string_fns.h>
  37 #include <rte_cpuflags.h>
  38 #include <rte_bus.h>
  39 #include <rte_version.h>
  40 #include <malloc_heap.h>
  41 #include <rte_vfio.h>
  42
  43 #include <telemetry_internal.h>
  44 #include "eal_private.h"
  45 #include "eal_thread.h"
  46 #include "eal_internal_cfg.h"
  47 #include "eal_filesystem.h"
  48 #include "eal_hugepages.h"
  49 #include "eal_memcfg.h"
  50 #include "eal_trace.h"
  51 #include "eal_log.h"
  52 #include "eal_options.h"
  53 #include "eal_vfio.h"
  54 #include "hotplug_mp.h"
  55
  56 #define MEMSIZE_IF_NO_HUGE_PAGE (64ULL * 1024ULL * 1024ULL)
  57
  58 #define SOCKET_MEM_STRLEN (RTE_MAX_NUMA_NODES * 10)
  59
  60 #define KERNEL_IOMMU_GROUPS_PATH "/sys/kernel/iommu_groups"
  61
  62 /* define fd variable here, because file needs to be kept open for the
  63  * duration of the program, as we hold a write lock on it in the primary proc */
  64 static int mem_cfg_fd = -1;
  65
  66 static struct flock wr_lock = {
  67                 .l_type = F_WRLCK,
  68                 .l_whence = SEEK_SET,
  69                 .l_start = offsetof(struct rte_mem_config, memsegs),
  70                 .l_len = RTE_SIZEOF_FIELD(struct rte_mem_config, memsegs),
  71 };
  72
  73 /* internal configuration (per-core) */
  74 struct lcore_config lcore_config[RTE_MAX_LCORE];
  75
  76 /* used by rte_rdtsc() */
  77 int rte_cycles_vmware_tsc_map;
  78
  79
  80 int
  81 eal_clean_runtime_dir(void)
  82 {
  83         const char *runtime_dir = rte_eal_get_runtime_dir();
  84         DIR *dir;
  85         struct dirent *dirent;
  86         int dir_fd, fd, lck_result;
  87         static const char * const filters[] = {
  88                 "fbarray_*",
  89                 "mp_socket_*"
  90         };
  91
  92         /* open directory */
  93         dir = opendir(runtime_dir);
  94         if (!dir) {
  95                 RTE_LOG(ERR, EAL, "Unable to open runtime directory %s\n",
  96                                 runtime_dir);
  97                 goto error;
  98         }
  99         dir_fd = dirfd(dir);
 100
 101         /* lock the directory before doing anything, to avoid races */
 102         if (flock(dir_fd, LOCK_EX) < 0) {
 103                 RTE_LOG(ERR, EAL, "Unable to lock runtime directory %s\n",
 104                         runtime_dir);
 105                 goto error;
 106         }
 107
 108         dirent = readdir(dir);
 109         if (!dirent) {
 110                 RTE_LOG(ERR, EAL, "Unable to read runtime directory %s\n",
 111                                 runtime_dir);
 112                 goto error;
 113         }
 114
 115         while (dirent != NULL) {
 116                 unsigned int f_idx;
 117                 bool skip = true;
 118
 119                 /* skip files that don't match the patterns */
 120                 for (f_idx = 0; f_idx < RTE_DIM(filters); f_idx++) {
 121                         const char *filter = filters[f_idx];
 122
 123                         if (fnmatch(filter, dirent->d_name, 0) == 0) {
 124                                 skip = false;
 125                                 break;
 126                         }
 127                 }
 128                 if (skip) {
 129                         dirent = readdir(dir);
 130                         continue;
 131                 }
 132
 133                 /* try and lock the file */
 134                 fd = openat(dir_fd, dirent->d_name, O_RDONLY);
 135
 136                 /* skip to next file */
 137                 if (fd == -1) {
 138                         dirent = readdir(dir);
 139                         continue;
 140                 }
 141
 142                 /* non-blocking lock */
 143                 lck_result = flock(fd, LOCK_EX | LOCK_NB);
 144
 145                 /* if lock succeeds, remove the file */
 146                 if (lck_result != -1)
 147                         unlinkat(dir_fd, dirent->d_name, 0);
 148                 close(fd);
 149                 dirent = readdir(dir);
 150         }
 151
 152         /* closedir closes dir_fd and drops the lock */
 153         closedir(dir);
 154         return 0;
 155
 156 error:
 157         if (dir)
 158                 closedir(dir);
 159
 160         RTE_LOG(ERR, EAL, "Error while clearing runtime dir: %s\n",
 161                 strerror(errno));
 162
 163         return -1;
 164 }
 165
 166
 167 /* create memory configuration in shared/mmap memory. Take out
 168  * a write lock on the memsegs, so we can auto-detect primary/secondary.
 169  * This means we never close the file while running (auto-close on exit).
 170  * We also don't lock the whole file, so that in future we can use read-locks
 171  * on other parts, e.g. memzones, to detect if there are running secondary
 172  * processes. */
 173 static int
 174 rte_eal_config_create(void)
 175 {
 176         struct rte_config *config = rte_eal_get_configuration();
 177         size_t page_sz = sysconf(_SC_PAGE_SIZE);
 178         size_t cfg_len = sizeof(*config->mem_config);
 179         size_t cfg_len_aligned = RTE_ALIGN(cfg_len, page_sz);
 180         void *rte_mem_cfg_addr, *mapped_mem_cfg_addr;
 181         int retval;
 182         const struct internal_config *internal_conf =
 183                 eal_get_internal_configuration();
 184
 185         const char *pathname = eal_runtime_config_path();
 186
 187         if (internal_conf->no_shconf)
 188                 return 0;
 189
 190         /* map the config before hugepage address so that we don't waste a page */
 191         if (internal_conf->base_virtaddr != 0)
 192                 rte_mem_cfg_addr = (void *)
 193                         RTE_ALIGN_FLOOR(internal_conf->base_virtaddr -
 194                         sizeof(struct rte_mem_config), page_sz);
 195         else
 196                 rte_mem_cfg_addr = NULL;
 197
 198         if (mem_cfg_fd < 0){
 199                 mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0600);
 200                 if (mem_cfg_fd < 0) {
 201                         RTE_LOG(ERR, EAL, "Cannot open '%s' for rte_mem_config\n",
 202                                 pathname);
 203                         return -1;
 204                 }
 205         }
 206
 207         retval = ftruncate(mem_cfg_fd, cfg_len);
 208         if (retval < 0){
 209                 close(mem_cfg_fd);
 210                 mem_cfg_fd = -1;
 211                 RTE_LOG(ERR, EAL, "Cannot resize '%s' for rte_mem_config\n",
 212                         pathname);
 213                 return -1;
 214         }
 215
 216         retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
 217         if (retval < 0){
 218                 close(mem_cfg_fd);
 219                 mem_cfg_fd = -1;
 220                 RTE_LOG(ERR, EAL, "Cannot create lock on '%s'. Is another primary "
 221                         "process running?\n", pathname);
 222                 return -1;
 223         }
 224
 225         /* reserve space for config */
 226         rte_mem_cfg_addr = eal_get_virtual_area(rte_mem_cfg_addr,
 227                         &cfg_len_aligned, page_sz, 0, 0);
 228         if (rte_mem_cfg_addr == NULL) {
 229                 RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config\n");
 230                 close(mem_cfg_fd);
 231                 mem_cfg_fd = -1;
 232                 return -1;
 233         }
 234
 235         /* remap the actual file into the space we've just reserved */
 236         mapped_mem_cfg_addr = mmap(rte_mem_cfg_addr,
 237                         cfg_len_aligned, PROT_READ | PROT_WRITE,
 238                         MAP_SHARED | MAP_FIXED, mem_cfg_fd, 0);
 239         if (mapped_mem_cfg_addr == MAP_FAILED) {
 240                 munmap(rte_mem_cfg_addr, cfg_len);
 241                 close(mem_cfg_fd);
 242                 mem_cfg_fd = -1;
 243                 RTE_LOG(ERR, EAL, "Cannot remap memory for rte_config\n");
 244                 return -1;
 245         }
 246
 247         memcpy(rte_mem_cfg_addr, config->mem_config, sizeof(struct rte_mem_config));
 248         config->mem_config = rte_mem_cfg_addr;
 249
 250         /* store address of the config in the config itself so that secondary
 251          * processes could later map the config into this exact location
 252          */
 253         config->mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;
 254         config->mem_config->dma_maskbits = 0;
 255
 256         return 0;
 257 }
 258
 259 /* attach to an existing shared memory config */
 260 static int
 261 rte_eal_config_attach(void)
 262 {
 263         struct rte_config *config = rte_eal_get_configuration();
 264         struct rte_mem_config *mem_config;
 265         const struct internal_config *internal_conf =
 266                 eal_get_internal_configuration();
 267
 268         const char *pathname = eal_runtime_config_path();
 269
 270         if (internal_conf->no_shconf)
 271                 return 0;
 272
 273         if (mem_cfg_fd < 0){
 274                 mem_cfg_fd = open(pathname, O_RDWR);
 275                 if (mem_cfg_fd < 0) {
 276                         RTE_LOG(ERR, EAL, "Cannot open '%s' for rte_mem_config\n",
 277                                 pathname);
 278                         return -1;
 279                 }
 280         }
 281
 282         /* map it as read-only first */
 283         mem_config = (struct rte_mem_config *) mmap(NULL, sizeof(*mem_config),
 284                         PROT_READ, MAP_SHARED, mem_cfg_fd, 0);
 285         if (mem_config == MAP_FAILED) {
 286                 close(mem_cfg_fd);
 287                 mem_cfg_fd = -1;
 288                 RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config! error %i (%s)\n",
 289                         errno, strerror(errno));
 290                 return -1;
 291         }
 292
 293         config->mem_config = mem_config;
 294
 295         return 0;
 296 }
 297
 298 /* reattach the shared config at exact memory location primary process has it */
 299 static int
 300 rte_eal_config_reattach(void)
 301 {
 302         struct rte_config *config = rte_eal_get_configuration();
 303         struct rte_mem_config *mem_config;
 304         void *rte_mem_cfg_addr;
 305         const struct internal_config *internal_conf =
 306                 eal_get_internal_configuration();
 307
 308         if (internal_conf->no_shconf)
 309                 return 0;
 310
 311         /* save the address primary process has mapped shared config to */
 312         rte_mem_cfg_addr =
 313                 (void *) (uintptr_t) config->mem_config->mem_cfg_addr;
 314
 315         /* unmap original config */
 316         munmap(config->mem_config, sizeof(struct rte_mem_config));
 317
 318         /* remap the config at proper address */
 319         mem_config = (struct rte_mem_config *) mmap(rte_mem_cfg_addr,
 320                         sizeof(*mem_config), PROT_READ | PROT_WRITE, MAP_SHARED,
 321                         mem_cfg_fd, 0);
 322
 323         close(mem_cfg_fd);
 324         mem_cfg_fd = -1;
 325
 326         if (mem_config == MAP_FAILED || mem_config != rte_mem_cfg_addr) {
 327                 if (mem_config != MAP_FAILED) {
 328                         /* errno is stale, don't use */
 329                         RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config at [%p], got [%p]"
 330                                 " - please use '--" OPT_BASE_VIRTADDR
 331                                 "' option\n", rte_mem_cfg_addr, mem_config);
 332                         munmap(mem_config, sizeof(struct rte_mem_config));
 333                         return -1;
 334                 }
 335                 RTE_LOG(ERR, EAL, "Cannot mmap memory for rte_config! error %i (%s)\n",
 336                         errno, strerror(errno));
 337                 return -1;
 338         }
 339
 340         config->mem_config = mem_config;
 341
 342         return 0;
 343 }
 344
 345 /* Detect if we are a primary or a secondary process */
 346 enum rte_proc_type_t
 347 eal_proc_type_detect(void)
 348 {
 349         enum rte_proc_type_t ptype = RTE_PROC_PRIMARY;
 350         const char *pathname = eal_runtime_config_path();
 351         const struct internal_config *internal_conf =
 352                 eal_get_internal_configuration();
 353
 354         /* if there no shared config, there can be no secondary processes */
 355         if (!internal_conf->no_shconf) {
 356                 /* if we can open the file but not get a write-lock we are a
 357                  * secondary process. NOTE: if we get a file handle back, we
 358                  * keep that open and don't close it to prevent a race condition
 359                  * between multiple opens.
 360                  */
 361                 if (((mem_cfg_fd = open(pathname, O_RDWR)) >= 0) &&
 362                                 (fcntl(mem_cfg_fd, F_SETLK, &wr_lock) < 0))
 363                         ptype = RTE_PROC_SECONDARY;
 364         }
 365
 366         RTE_LOG(INFO, EAL, "Auto-detected process type: %s\n",
 367                         ptype == RTE_PROC_PRIMARY ? "PRIMARY" : "SECONDARY");
 368
 369         return ptype;
 370 }
 371
 372 /* Sets up rte_config structure with the pointer to shared memory config.*/
 373 static int
 374 rte_config_init(void)
 375 {
 376         struct rte_config *config = rte_eal_get_configuration();
 377         const struct internal_config *internal_conf =
 378                 eal_get_internal_configuration();
 379
 380         config->process_type = internal_conf->process_type;
 381
 382         switch (config->process_type) {
 383         case RTE_PROC_PRIMARY:
 384                 if (rte_eal_config_create() < 0)
 385                         return -1;
 386                 eal_mcfg_update_from_internal();
 387                 break;
 388         case RTE_PROC_SECONDARY:
 389                 if (rte_eal_config_attach() < 0)
 390                         return -1;
 391                 eal_mcfg_wait_complete();
 392                 if (eal_mcfg_check_version() < 0) {
 393                         RTE_LOG(ERR, EAL, "Primary and secondary process DPDK version mismatch\n");
 394                         return -1;
 395                 }
 396                 if (rte_eal_config_reattach() < 0)
 397                         return -1;
 398                 if (!__rte_mp_enable()) {
 399                         RTE_LOG(ERR, EAL, "Primary process refused secondary attachment\n");
 400                         return -1;
 401                 }
 402                 eal_mcfg_update_internal();
 403                 break;
 404         case RTE_PROC_AUTO:
 405         case RTE_PROC_INVALID:
 406                 RTE_LOG(ERR, EAL, "Invalid process type %d\n",
 407                         config->process_type);
 408                 return -1;
 409         }
 410
 411         return 0;
 412 }
 413
 414 /* Unlocks hugepage directories that were locked by eal_hugepage_info_init */
 415 static void
 416 eal_hugedirs_unlock(void)
 417 {
 418         int i;
 419         struct internal_config *internal_conf =
 420                 eal_get_internal_configuration();
 421
 422         for (i = 0; i < MAX_HUGEPAGE_SIZES; i++)
 423         {
 424                 /* skip uninitialized */
 425                 if (internal_conf->hugepage_info[i].lock_descriptor < 0)
 426                         continue;
 427                 /* unlock hugepage file */
 428                 flock(internal_conf->hugepage_info[i].lock_descriptor, LOCK_UN);
 429                 close(internal_conf->hugepage_info[i].lock_descriptor);
 430                 /* reset the field */
 431                 internal_conf->hugepage_info[i].lock_descriptor = -1;
 432         }
 433 }
 434
 435 /* display usage */
 436 static void
 437 eal_usage(const char *prgname)
 438 {
 439         rte_usage_hook_t hook = eal_get_application_usage_hook();
 440
 441         printf("\nUsage: %s ", prgname);
 442         eal_common_usage();
 443         printf("EAL Linux options:\n"
 444                "  --"OPT_SOCKET_MEM"        Memory to allocate on sockets (comma separated values)\n"
 445                "  --"OPT_SOCKET_LIMIT"      Limit memory allocation on sockets (comma separated values)\n"
 446                "  --"OPT_HUGE_DIR"          Directory where hugetlbfs is mounted\n"
 447                "  --"OPT_FILE_PREFIX"       Prefix for hugepage filenames\n"
 448                "  --"OPT_CREATE_UIO_DEV"    Create /dev/uioX (usually done by hotplug)\n"
 449                "  --"OPT_VFIO_INTR"         Interrupt mode for VFIO (legacy|msi|msix)\n"
 450                "  --"OPT_VFIO_VF_TOKEN"     VF token (UUID) shared between SR-IOV PF and VFs\n"
 451                "  --"OPT_LEGACY_MEM"        Legacy memory mode (no dynamic allocation, contiguous segments)\n"
 452                "  --"OPT_SINGLE_FILE_SEGMENTS" Put all hugepage memory in single files\n"
 453                "  --"OPT_MATCH_ALLOCATIONS" Free hugepages exactly as allocated\n"
 454                "\n");
 455         /* Allow the application to print its usage message too if hook is set */
 456         if (hook) {
 457                 printf("===== Application Usage =====\n\n");
 458                 (hook)(prgname);
 459         }
 460 }
 461
 462 static int
 463 eal_parse_socket_arg(char *strval, volatile uint64_t *socket_arg)
 464 {
 465         char * arg[RTE_MAX_NUMA_NODES];
 466         char *end;
 467         int arg_num, i, len;
 468
 469         len = strnlen(strval, SOCKET_MEM_STRLEN);
 470         if (len == SOCKET_MEM_STRLEN) {
 471                 RTE_LOG(ERR, EAL, "--socket-mem is too long\n");
 472                 return -1;
 473         }
 474
 475         /* all other error cases will be caught later */
 476         if (!isdigit(strval[len-1]))
 477                 return -1;
 478
 479         /* split the optarg into separate socket values */
 480         arg_num = rte_strsplit(strval, len,
 481                         arg, RTE_MAX_NUMA_NODES, ',');
 482
 483         /* if split failed, or 0 arguments */
 484         if (arg_num <= 0)
 485                 return -1;
 486
 487         /* parse each defined socket option */
 488         errno = 0;
 489         for (i = 0; i < arg_num; i++) {
 490                 uint64_t val;
 491                 end = NULL;
 492                 val = strtoull(arg[i], &end, 10);
 493
 494                 /* check for invalid input */
 495                 if ((errno != 0)  ||
 496                                 (arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
 497                         return -1;
 498                 val <<= 20;
 499                 socket_arg[i] = val;
 500         }
 501
 502         return 0;
 503 }
 504
 505 static int
 506 eal_parse_vfio_intr(const char *mode)
 507 {
 508         struct internal_config *internal_conf =
 509                 eal_get_internal_configuration();
 510         unsigned i;
 511         static struct {
 512                 const char *name;
 513                 enum rte_intr_mode value;
 514         } map[] = {
 515                 { "legacy", RTE_INTR_MODE_LEGACY },
 516                 { "msi", RTE_INTR_MODE_MSI },
 517                 { "msix", RTE_INTR_MODE_MSIX },
 518         };
 519
 520         for (i = 0; i < RTE_DIM(map); i++) {
 521                 if (!strcmp(mode, map[i].name)) {
 522                         internal_conf->vfio_intr_mode = map[i].value;
 523                         return 0;
 524                 }
 525         }
 526         return -1;
 527 }
 528
 529 static int
 530 eal_parse_vfio_vf_token(const char *vf_token)
 531 {
 532         struct internal_config *cfg = eal_get_internal_configuration();
 533         rte_uuid_t uuid;
 534
 535         if (!rte_uuid_parse(vf_token, uuid)) {
 536                 rte_uuid_copy(cfg->vfio_vf_token, uuid);
 537                 return 0;
 538         }
 539
 540         return -1;
 541 }
 542
 543 /* Parse the arguments for --log-level only */
 544 static void
 545 eal_log_level_parse(int argc, char **argv)
 546 {
 547         int opt;
 548         char **argvopt;
 549         int option_index;
 550         const int old_optind = optind;
 551         const int old_optopt = optopt;
 552         char * const old_optarg = optarg;
 553         struct internal_config *internal_conf =
 554                 eal_get_internal_configuration();
 555
 556         argvopt = argv;
 557         optind = 1;
 558
 559         while ((opt = getopt_long(argc, argvopt, eal_short_options,
 560                                   eal_long_options, &option_index)) != EOF) {
 561
 562                 int ret;
 563
 564                 /* getopt is not happy, stop right now */
 565                 if (opt == '?')
 566                         break;
 567
 568                 ret = (opt == OPT_LOG_LEVEL_NUM) ?
 569                         eal_parse_common_option(opt, optarg, internal_conf) : 0;
 570
 571                 /* common parser is not happy */
 572                 if (ret < 0)
 573                         break;
 574         }
 575
 576         /* restore getopt lib */
 577         optind = old_optind;
 578         optopt = old_optopt;
 579         optarg = old_optarg;
 580 }
 581
 582 /* Parse the argument given in the command line of the application */
 583 static int
 584 eal_parse_args(int argc, char **argv)
 585 {
 586         int opt, ret;
 587         char **argvopt;
 588         int option_index;
 589         char *prgname = argv[0];
 590         const int old_optind = optind;
 591         const int old_optopt = optopt;
 592         char * const old_optarg = optarg;
 593         struct internal_config *internal_conf =
 594                 eal_get_internal_configuration();
 595
 596         argvopt = argv;
 597         optind = 1;
 598
 599         while ((opt = getopt_long(argc, argvopt, eal_short_options,
 600                                   eal_long_options, &option_index)) != EOF) {
 601
 602                 /* getopt didn't recognise the option */
 603                 if (opt == '?') {
 604                         eal_usage(prgname);
 605                         ret = -1;
 606                         goto out;
 607                 }
 608
 609                 /* eal_log_level_parse() already handled this option */
 610                 if (opt == OPT_LOG_LEVEL_NUM)
 611                         continue;
 612
 613                 ret = eal_parse_common_option(opt, optarg, internal_conf);
 614                 /* common parser is not happy */
 615                 if (ret < 0) {
 616                         eal_usage(prgname);
 617                         ret = -1;
 618                         goto out;
 619                 }
 620                 /* common parser handled this option */
 621                 if (ret == 0)
 622                         continue;
 623
 624                 switch (opt) {
 625                 case 'h':
 626                         eal_usage(prgname);
 627                         exit(EXIT_SUCCESS);
 628
 629                 case OPT_HUGE_DIR_NUM:
 630                 {
 631                         char *hdir = strdup(optarg);
 632                         if (hdir == NULL)
 633                                 RTE_LOG(ERR, EAL, "Could not store hugepage directory\n");
 634                         else {
 635                                 /* free old hugepage dir */
 636                                 free(internal_conf->hugepage_dir);
 637                                 internal_conf->hugepage_dir = hdir;
 638                         }
 639                         break;
 640                 }
 641                 case OPT_FILE_PREFIX_NUM:
 642                 {
 643                         char *prefix = strdup(optarg);
 644                         if (prefix == NULL)
 645                                 RTE_LOG(ERR, EAL, "Could not store file prefix\n");
 646                         else {
 647                                 /* free old prefix */
 648                                 free(internal_conf->hugefile_prefix);
 649                                 internal_conf->hugefile_prefix = prefix;
 650                         }
 651                         break;
 652                 }
 653                 case OPT_SOCKET_MEM_NUM:
 654                         if (eal_parse_socket_arg(optarg,
 655                                         internal_conf->socket_mem) < 0) {
 656                                 RTE_LOG(ERR, EAL, "invalid parameters for --"
 657                                                 OPT_SOCKET_MEM "\n");
 658                                 eal_usage(prgname);
 659                                 ret = -1;
 660                                 goto out;
 661                         }
 662                         internal_conf->force_sockets = 1;
 663                         break;
 664
 665                 case OPT_SOCKET_LIMIT_NUM:
 666                         if (eal_parse_socket_arg(optarg,
 667                                         internal_conf->socket_limit) < 0) {
 668                                 RTE_LOG(ERR, EAL, "invalid parameters for --"
 669                                                 OPT_SOCKET_LIMIT "\n");
 670                                 eal_usage(prgname);
 671                                 ret = -1;
 672                                 goto out;
 673                         }
 674                         internal_conf->force_socket_limits = 1;
 675                         break;
 676
 677                 case OPT_VFIO_INTR_NUM:
 678                         if (eal_parse_vfio_intr(optarg) < 0) {
 679                                 RTE_LOG(ERR, EAL, "invalid parameters for --"
 680                                                 OPT_VFIO_INTR "\n");
 681                                 eal_usage(prgname);
 682                                 ret = -1;
 683                                 goto out;
 684                         }
 685                         break;
 686
 687                 case OPT_VFIO_VF_TOKEN_NUM:
 688                         if (eal_parse_vfio_vf_token(optarg) < 0) {
 689                                 RTE_LOG(ERR, EAL, "invalid parameters for --"
 690                                                 OPT_VFIO_VF_TOKEN "\n");
 691                                 eal_usage(prgname);
 692                                 ret = -1;
 693                                 goto out;
 694                         }
 695                         break;
 696
 697                 case OPT_CREATE_UIO_DEV_NUM:
 698                         internal_conf->create_uio_dev = 1;
 699                         break;
 700
 701                 case OPT_MBUF_POOL_OPS_NAME_NUM:
 702                 {
 703                         char *ops_name = strdup(optarg);
 704                         if (ops_name == NULL)
 705                                 RTE_LOG(ERR, EAL, "Could not store mbuf pool ops name\n");
 706                         else {
 707                                 /* free old ops name */
 708                                 free(internal_conf->user_mbuf_pool_ops_name);
 709
 710                                 internal_conf->user_mbuf_pool_ops_name =
 711                                                 ops_name;
 712                         }
 713                         break;
 714                 }
 715                 case OPT_MATCH_ALLOCATIONS_NUM:
 716                         internal_conf->match_allocations = 1;
 717                         break;
 718
 719                 default:
 720                         if (opt < OPT_LONG_MIN_NUM && isprint(opt)) {
 721                                 RTE_LOG(ERR, EAL, "Option %c is not supported "
 722                                         "on Linux\n", opt);
 723                         } else if (opt >= OPT_LONG_MIN_NUM &&
 724                                    opt < OPT_LONG_MAX_NUM) {
 725                                 RTE_LOG(ERR, EAL, "Option %s is not supported "
 726                                         "on Linux\n",
 727                                         eal_long_options[option_index].name);
 728                         } else {
 729                                 RTE_LOG(ERR, EAL, "Option %d is not supported "
 730                                         "on Linux\n", opt);
 731                         }
 732                         eal_usage(prgname);
 733                         ret = -1;
 734                         goto out;
 735                 }
 736         }
 737
 738         /* create runtime data directory. In no_shconf mode, skip any errors */
 739         if (eal_create_runtime_dir() < 0) {
 740                 if (internal_conf->no_shconf == 0) {
 741                         RTE_LOG(ERR, EAL, "Cannot create runtime directory\n");
 742                         ret = -1;
 743                         goto out;
 744                 } else
 745                         RTE_LOG(WARNING, EAL, "No DPDK runtime directory created\n");
 746         }
 747
 748         if (eal_adjust_config(internal_conf) != 0) {
 749                 ret = -1;
 750                 goto out;
 751         }
 752
 753         /* sanity checks */
 754         if (eal_check_common_options(internal_conf) != 0) {
 755                 eal_usage(prgname);
 756                 ret = -1;
 757                 goto out;
 758         }
 759
 760         if (optind >= 0)
 761                 argv[optind-1] = prgname;
 762         ret = optind-1;
 763
 764 out:
 765         /* restore getopt lib */
 766         optind = old_optind;
 767         optopt = old_optopt;
 768         optarg = old_optarg;
 769
 770         return ret;
 771 }
 772
 773 static int
 774 check_socket(const struct rte_memseg_list *msl, void *arg)
 775 {
 776         int *socket_id = arg;
 777
 778         if (msl->external)
 779                 return 0;
 780
 781         return *socket_id == msl->socket_id;
 782 }
 783
 784 static void
 785 eal_check_mem_on_local_socket(void)
 786 {
 787         int socket_id;
 788         const struct rte_config *config = rte_eal_get_configuration();
 789
 790         socket_id = rte_lcore_to_socket_id(config->main_lcore);
 791
 792         if (rte_memseg_list_walk(check_socket, &socket_id) == 0)
 793                 RTE_LOG(WARNING, EAL, "WARNING: Main core has no memory on local socket!\n");
 794 }
 795
 796 static int
 797 sync_func(__rte_unused void *arg)
 798 {
 799         return 0;
 800 }
 801
 802 /*
 803  * Request iopl privilege for all RPL, returns 0 on success
 804  * iopl() call is mostly for the i386 architecture. For other architectures,
 805  * return -1 to indicate IO privilege can't be changed in this way.
 806  */
 807 int
 808 rte_eal_iopl_init(void)
 809 {
 810 #if defined(RTE_ARCH_X86)
 811         if (iopl(3) != 0)
 812                 return -1;
 813 #endif
 814         return 0;
 815 }
 816
 817 #ifdef VFIO_PRESENT
 818 static int rte_eal_vfio_setup(void)
 819 {
 820         if (rte_vfio_enable("vfio"))
 821                 return -1;
 822
 823         return 0;
 824 }
 825 #endif
 826
 827 static void rte_eal_init_alert(const char *msg)
 828 {
 829         fprintf(stderr, "EAL: FATAL: %s\n", msg);
 830         RTE_LOG(ERR, EAL, "%s\n", msg);
 831 }
 832
 833 /*
 834  * On Linux 3.6+, even if VFIO is not loaded, whenever IOMMU is enabled in the
 835  * BIOS and in the kernel, /sys/kernel/iommu_groups path will contain kernel
 836  * IOMMU groups. If IOMMU is not enabled, that path would be empty.
 837  * Therefore, checking if the path is empty will tell us if IOMMU is enabled.
 838  */
 839 static bool
 840 is_iommu_enabled(void)
 841 {
 842         DIR *dir = opendir(KERNEL_IOMMU_GROUPS_PATH);
 843         struct dirent *d;
 844         int n = 0;
 845
 846         /* if directory doesn't exist, assume IOMMU is not enabled */
 847         if (dir == NULL)
 848                 return false;
 849
 850         while ((d = readdir(dir)) != NULL) {
 851                 /* skip dot and dot-dot */
 852                 if (++n > 2)
 853                         break;
 854         }
 855         closedir(dir);
 856
 857         return n > 2;
 858 }
 859
 860 /* Launch threads, called at application init(). */
 861 int
 862 rte_eal_init(int argc, char **argv)
 863 {
 864         int i, fctret, ret;
 865         pthread_t thread_id;
 866         static uint32_t run_once;
 867         uint32_t has_run = 0;
 868         const char *p;
 869         static char logid[PATH_MAX];
 870         char cpuset[RTE_CPU_AFFINITY_STR_LEN];
 871         char thread_name[RTE_MAX_THREAD_NAME_LEN];
 872         bool phys_addrs;
 873         const struct rte_config *config = rte_eal_get_configuration();
 874         struct internal_config *internal_conf =
 875                 eal_get_internal_configuration();
 876
 877         /* checks if the machine is adequate */
 878         if (!rte_cpu_is_supported()) {
 879                 rte_eal_init_alert("unsupported cpu type.");
 880                 rte_errno = ENOTSUP;
 881                 return -1;
 882         }
 883
 884         if (!__atomic_compare_exchange_n(&run_once, &has_run, 1, 0,
 885                                         __ATOMIC_RELAXED, __ATOMIC_RELAXED)) {
 886                 rte_eal_init_alert("already called initialization.");
 887                 rte_errno = EALREADY;
 888                 return -1;
 889         }
 890
 891         p = strrchr(argv[0], '/');
 892         strlcpy(logid, p ? p + 1 : argv[0], sizeof(logid));
 893         thread_id = pthread_self();
 894
 895         eal_reset_internal_config(internal_conf);
 896
 897         /* set log level as early as possible */
 898         eal_log_level_parse(argc, argv);
 899
 900         /* clone argv to report out later in telemetry */
 901         eal_save_args(argc, argv);
 902
 903         if (rte_eal_cpu_init() < 0) {
 904                 rte_eal_init_alert("Cannot detect lcores.");
 905                 rte_errno = ENOTSUP;
 906                 return -1;
 907         }
 908
 909         fctret = eal_parse_args(argc, argv);
 910         if (fctret < 0) {
 911                 rte_eal_init_alert("Invalid 'command line' arguments.");
 912                 rte_errno = EINVAL;
 913                 __atomic_store_n(&run_once, 0, __ATOMIC_RELAXED);
 914                 return -1;
 915         }
 916
 917         if (eal_plugins_init() < 0) {
 918                 rte_eal_init_alert("Cannot init plugins");
 919                 rte_errno = EINVAL;
 920                 __atomic_store_n(&run_once, 0, __ATOMIC_RELAXED);
 921                 return -1;
 922         }
 923
 924         if (eal_trace_init() < 0) {
 925                 rte_eal_init_alert("Cannot init trace");
 926                 rte_errno = EFAULT;
 927                 return -1;
 928         }
 929
 930         if (eal_option_device_parse()) {
 931                 rte_errno = ENODEV;
 932                 __atomic_store_n(&run_once, 0, __ATOMIC_RELAXED);
 933                 return -1;
 934         }
 935
 936         if (rte_config_init() < 0) {
 937                 rte_eal_init_alert("Cannot init config");
 938                 return -1;
 939         }
 940
 941         if (rte_eal_intr_init() < 0) {
 942                 rte_eal_init_alert("Cannot init interrupt-handling thread");
 943                 return -1;
 944         }
 945
 946         if (rte_eal_alarm_init() < 0) {
 947                 rte_eal_init_alert("Cannot init alarm");
 948                 /* rte_eal_alarm_init sets rte_errno on failure. */
 949                 return -1;
 950         }
 951
 952         /* Put mp channel init before bus scan so that we can init the vdev
 953          * bus through mp channel in the secondary process before the bus scan.
 954          */
 955         if (rte_mp_channel_init() < 0 && rte_errno != ENOTSUP) {
 956                 rte_eal_init_alert("failed to init mp channel");
 957                 if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 958                         rte_errno = EFAULT;
 959                         return -1;
 960                 }
 961         }
 962
 963         /* register multi-process action callbacks for hotplug */
 964         if (eal_mp_dev_hotplug_init() < 0) {
 965                 rte_eal_init_alert("failed to register mp callback for hotplug");
 966                 return -1;
 967         }
 968
 969         if (rte_bus_scan()) {
 970                 rte_eal_init_alert("Cannot scan the buses for devices");
 971                 rte_errno = ENODEV;
 972                 __atomic_store_n(&run_once, 0, __ATOMIC_RELAXED);
 973                 return -1;
 974         }
 975
 976         phys_addrs = rte_eal_using_phys_addrs() != 0;
 977
 978         /* if no EAL option "--iova-mode=<pa|va>", use bus IOVA scheme */
 979         if (internal_conf->iova_mode == RTE_IOVA_DC) {
 980                 /* autodetect the IOVA mapping mode */
 981                 enum rte_iova_mode iova_mode = rte_bus_get_iommu_class();
 982
 983                 if (iova_mode == RTE_IOVA_DC) {
 984                         RTE_LOG(DEBUG, EAL, "Buses did not request a specific IOVA mode.\n");
 985
 986                         if (!phys_addrs) {
 987                                 /* if we have no access to physical addresses,
 988                                  * pick IOVA as VA mode.
 989                                  */
 990                                 iova_mode = RTE_IOVA_VA;
 991                                 RTE_LOG(DEBUG, EAL, "Physical addresses are unavailable, selecting IOVA as VA mode.\n");
 992 #if defined(RTE_LIB_KNI) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0)
 993                         } else if (rte_eal_check_module("rte_kni") == 1) {
 994                                 iova_mode = RTE_IOVA_PA;
 995                                 RTE_LOG(DEBUG, EAL, "KNI is loaded, selecting IOVA as PA mode for better KNI performance.\n");
 996 #endif
 997                         } else if (is_iommu_enabled()) {
 998                                 /* we have an IOMMU, pick IOVA as VA mode */
 999                                 iova_mode = RTE_IOVA_VA;
1000                                 RTE_LOG(DEBUG, EAL, "IOMMU is available, selecting IOVA as VA mode.\n");
1001                         } else {
1002                                 /* physical addresses available, and no IOMMU
1003                                  * found, so pick IOVA as PA.
1004                                  */
1005                                 iova_mode = RTE_IOVA_PA;
1006                                 RTE_LOG(DEBUG, EAL, "IOMMU is not available, selecting IOVA as PA mode.\n");
1007                         }
1008                 }
1009 #if defined(RTE_LIB_KNI) && LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
1010                 /* Workaround for KNI which requires physical address to work
1011                  * in kernels < 4.10
1012                  */
1013                 if (iova_mode == RTE_IOVA_VA &&
1014                                 rte_eal_check_module("rte_kni") == 1) {
1015                         if (phys_addrs) {
1016                                 iova_mode = RTE_IOVA_PA;
1017                                 RTE_LOG(WARNING, EAL, "Forcing IOVA as 'PA' because KNI module is loaded\n");
1018                         } else {
1019                                 RTE_LOG(DEBUG, EAL, "KNI can not work since physical addresses are unavailable\n");
1020                         }
1021                 }
1022 #endif
1023                 rte_eal_get_configuration()->iova_mode = iova_mode;
1024         } else {
1025                 rte_eal_get_configuration()->iova_mode =
1026                         internal_conf->iova_mode;
1027         }
1028
1029         if (rte_eal_iova_mode() == RTE_IOVA_PA && !phys_addrs) {
1030                 rte_eal_init_alert("Cannot use IOVA as 'PA' since physical addresses are not available");
1031                 rte_errno = EINVAL;
1032                 return -1;
1033         }
1034
1035         RTE_LOG(INFO, EAL, "Selected IOVA mode '%s'\n",
1036                 rte_eal_iova_mode() == RTE_IOVA_PA ? "PA" : "VA");
1037
1038         if (internal_conf->no_hugetlbfs == 0) {
1039                 /* rte_config isn't initialized yet */
1040                 ret = internal_conf->process_type == RTE_PROC_PRIMARY ?
1041                                 eal_hugepage_info_init() :
1042                                 eal_hugepage_info_read();
1043                 if (ret < 0) {
1044                         rte_eal_init_alert("Cannot get hugepage information.");
1045                         rte_errno = EACCES;
1046                         __atomic_store_n(&run_once, 0, __ATOMIC_RELAXED);
1047                         return -1;
1048                 }
1049         }
1050
1051         if (internal_conf->memory == 0 && internal_conf->force_sockets == 0) {
1052                 if (internal_conf->no_hugetlbfs)
1053                         internal_conf->memory = MEMSIZE_IF_NO_HUGE_PAGE;
1054         }
1055
1056         if (internal_conf->vmware_tsc_map == 1) {
1057 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
1058                 rte_cycles_vmware_tsc_map = 1;
1059                 RTE_LOG (DEBUG, EAL, "Using VMWARE TSC MAP, "
1060                                 "you must have monitor_control.pseudo_perfctr = TRUE\n");
1061 #else
1062                 RTE_LOG (WARNING, EAL, "Ignoring --vmware-tsc-map because "
1063                                 "RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT is not set\n");
1064 #endif
1065         }
1066
1067         if (eal_log_init(logid, internal_conf->syslog_facility) < 0) {
1068                 rte_eal_init_alert("Cannot init logging.");
1069                 rte_errno = ENOMEM;
1070                 __atomic_store_n(&run_once, 0, __ATOMIC_RELAXED);
1071                 return -1;
1072         }
1073
1074 #ifdef VFIO_PRESENT
1075         if (rte_eal_vfio_setup() < 0) {
1076                 rte_eal_init_alert("Cannot init VFIO");
1077                 rte_errno = EAGAIN;
1078                 __atomic_store_n(&run_once, 0, __ATOMIC_RELAXED);
1079                 return -1;
1080         }
1081 #endif
1082         /* in secondary processes, memory init may allocate additional fbarrays
1083          * not present in primary processes, so to avoid any potential issues,
1084          * initialize memzones first.
1085          */
1086         if (rte_eal_memzone_init() < 0) {
1087                 rte_eal_init_alert("Cannot init memzone");
1088                 rte_errno = ENODEV;
1089                 return -1;
1090         }
1091
1092         if (rte_eal_memory_init() < 0) {
1093                 rte_eal_init_alert("Cannot init memory");
1094                 rte_errno = ENOMEM;
1095                 return -1;
1096         }
1097
1098         /* the directories are locked during eal_hugepage_info_init */
1099         eal_hugedirs_unlock();
1100
1101         if (rte_eal_malloc_heap_init() < 0) {
1102                 rte_eal_init_alert("Cannot init malloc heap");
1103                 rte_errno = ENODEV;
1104                 return -1;
1105         }
1106
1107         if (rte_eal_tailqs_init() < 0) {
1108                 rte_eal_init_alert("Cannot init tail queues for objects");
1109                 rte_errno = EFAULT;
1110                 return -1;
1111         }
1112
1113         if (rte_eal_timer_init() < 0) {
1114                 rte_eal_init_alert("Cannot init HPET or TSC timers");
1115                 rte_errno = ENOTSUP;
1116                 return -1;
1117         }
1118
1119         eal_check_mem_on_local_socket();
1120
1121         if (pthread_setaffinity_np(pthread_self(), sizeof(rte_cpuset_t),
1122                         &lcore_config[config->main_lcore].cpuset) != 0) {
1123                 rte_eal_init_alert("Cannot set affinity");
1124                 rte_errno = EINVAL;
1125                 return -1;
1126         }
1127         __rte_thread_init(config->main_lcore,
1128                 &lcore_config[config->main_lcore].cpuset);
1129
1130         ret = eal_thread_dump_current_affinity(cpuset, sizeof(cpuset));
1131         RTE_LOG(DEBUG, EAL, "Main lcore %u is ready (tid=%zx;cpuset=[%s%s])\n",
1132                 config->main_lcore, (uintptr_t)thread_id, cpuset,
1133                 ret == 0 ? "" : "...");
1134
1135         RTE_LCORE_FOREACH_WORKER(i) {
1136
1137                 /*
1138                  * create communication pipes between main thread
1139                  * and children
1140                  */
1141                 if (pipe(lcore_config[i].pipe_main2worker) < 0)
1142                         rte_panic("Cannot create pipe\n");
1143                 if (pipe(lcore_config[i].pipe_worker2main) < 0)
1144                         rte_panic("Cannot create pipe\n");
1145
1146                 lcore_config[i].state = WAIT;
1147
1148                 /* create a thread for each lcore */
1149                 ret = pthread_create(&lcore_config[i].thread_id, NULL,
1150                                      eal_thread_loop, NULL);
1151                 if (ret != 0)
1152                         rte_panic("Cannot create thread\n");
1153
1154                 /* Set thread_name for aid in debugging. */
1155                 snprintf(thread_name, sizeof(thread_name),
1156                         "lcore-worker-%d", i);
1157                 ret = rte_thread_setname(lcore_config[i].thread_id,
1158                                                 thread_name);
1159                 if (ret != 0)
1160                         RTE_LOG(DEBUG, EAL,
1161                                 "Cannot set name for lcore thread\n");
1162
1163                 ret = pthread_setaffinity_np(lcore_config[i].thread_id,
1164                         sizeof(rte_cpuset_t), &lcore_config[i].cpuset);
1165                 if (ret != 0)
1166                         rte_panic("Cannot set affinity\n");
1167         }
1168
1169         /*
1170          * Launch a dummy function on all worker lcores, so that main lcore
1171          * knows they are all ready when this function returns.
1172          */
1173         rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MAIN);
1174         rte_eal_mp_wait_lcore();
1175
1176         /* initialize services so vdevs register service during bus_probe. */
1177         ret = rte_service_init();
1178         if (ret) {
1179                 rte_eal_init_alert("rte_service_init() failed");
1180                 rte_errno = -ret;
1181                 return -1;
1182         }
1183
1184         /* Probe all the buses and devices/drivers on them */
1185         if (rte_bus_probe()) {
1186                 rte_eal_init_alert("Cannot probe devices");
1187                 rte_errno = ENOTSUP;
1188                 return -1;
1189         }
1190
1191 #ifdef VFIO_PRESENT
1192         /* Register mp action after probe() so that we got enough info */
1193         if (rte_vfio_is_enabled("vfio") && vfio_mp_sync_setup() < 0)
1194                 return -1;
1195 #endif
1196
1197         /* initialize default service/lcore mappings and start running. Ignore
1198          * -ENOTSUP, as it indicates no service coremask passed to EAL.
1199          */
1200         ret = rte_service_start_with_defaults();
1201         if (ret < 0 && ret != -ENOTSUP) {
1202                 rte_errno = -ret;
1203                 return -1;
1204         }
1205
1206         /*
1207          * Clean up unused files in runtime directory. We do this at the end of
1208          * init and not at the beginning because we want to clean stuff up
1209          * whether we are primary or secondary process, but we cannot remove
1210          * primary process' files because secondary should be able to run even
1211          * if primary process is dead.
1212          *
1213          * In no_shconf mode, no runtime directory is created in the first
1214          * place, so no cleanup needed.
1215          */
1216         if (!internal_conf->no_shconf && eal_clean_runtime_dir() < 0) {
1217                 rte_eal_init_alert("Cannot clear runtime directory");
1218                 return -1;
1219         }
1220         if (rte_eal_process_type() == RTE_PROC_PRIMARY && !internal_conf->no_telemetry) {
1221                 int tlog = rte_log_register_type_and_pick_level(
1222                                 "lib.telemetry", RTE_LOG_WARNING);
1223                 if (tlog < 0)
1224                         tlog = RTE_LOGTYPE_EAL;
1225                 if (rte_telemetry_init(rte_eal_get_runtime_dir(),
1226                                 rte_version(),
1227                                 &internal_conf->ctrl_cpuset, rte_log, tlog) != 0)
1228                         return -1;
1229         }
1230
1231         eal_mcfg_complete();
1232
1233         return fctret;
1234 }
1235
1236 static int
1237 mark_freeable(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
1238                 void *arg __rte_unused)
1239 {
1240         /* ms is const, so find this memseg */
1241         struct rte_memseg *found;
1242
1243         if (msl->external)
1244                 return 0;
1245
1246         found = rte_mem_virt2memseg(ms->addr, msl);
1247
1248         found->flags &= ~RTE_MEMSEG_FLAG_DO_NOT_FREE;
1249
1250         return 0;
1251 }
1252
1253 int
1254 rte_eal_cleanup(void)
1255 {
1256         /* if we're in a primary process, we need to mark hugepages as freeable
1257          * so that finalization can release them back to the system.
1258          */
1259         struct internal_config *internal_conf =
1260                 eal_get_internal_configuration();
1261
1262         if (rte_eal_process_type() == RTE_PROC_PRIMARY &&
1263                         internal_conf->hugepage_file.unlink_existing)
1264                 rte_memseg_walk(mark_freeable, NULL);
1265
1266         rte_service_finalize();
1267 #ifdef VFIO_PRESENT
1268         vfio_mp_sync_cleanup();
1269 #endif
1270         rte_mp_channel_cleanup();
1271         /* after this point, any DPDK pointers will become dangling */
1272         rte_eal_memory_detach();
1273         eal_mp_dev_hotplug_cleanup();
1274         rte_eal_malloc_heap_cleanup();
1275         rte_eal_alarm_cleanup();
1276         rte_trace_save();
1277         eal_trace_fini();
1278         eal_cleanup_config(internal_conf);
1279         rte_eal_log_cleanup();
1280         return 0;
1281 }
1282
1283 int rte_eal_create_uio_dev(void)
1284 {
1285         const struct internal_config *internal_conf =
1286                 eal_get_internal_configuration();
1287
1288         return internal_conf->create_uio_dev;
1289 }
1290
1291 enum rte_intr_mode
1292 rte_eal_vfio_intr_mode(void)
1293 {
1294         const struct internal_config *internal_conf =
1295                 eal_get_internal_configuration();
1296
1297         return internal_conf->vfio_intr_mode;
1298 }
1299
1300 void
1301 rte_eal_vfio_get_vf_token(rte_uuid_t vf_token)
1302 {
1303         struct internal_config *cfg = eal_get_internal_configuration();
1304
1305         rte_uuid_copy(vf_token, cfg->vfio_vf_token);
1306 }
1307
1308 int
1309 rte_eal_check_module(const char *module_name)
1310 {
1311         char sysfs_mod_name[PATH_MAX];
1312         struct stat st;
1313         int n;
1314
1315         if (NULL == module_name)
1316                 return -1;
1317
1318         /* Check if there is sysfs mounted */
1319         if (stat("/sys/module", &st) != 0) {
1320                 RTE_LOG(DEBUG, EAL, "sysfs is not mounted! error %i (%s)\n",
1321                         errno, strerror(errno));
1322                 return -1;
1323         }
1324
1325         /* A module might be built-in, therefore try sysfs */
1326         n = snprintf(sysfs_mod_name, PATH_MAX, "/sys/module/%s", module_name);
1327         if (n < 0 || n > PATH_MAX) {
1328                 RTE_LOG(DEBUG, EAL, "Could not format module path\n");
1329                 return -1;
1330         }
1331
1332         if (stat(sysfs_mod_name, &st) != 0) {
1333                 RTE_LOG(DEBUG, EAL, "Module %s not found! error %i (%s)\n",
1334                         sysfs_mod_name, errno, strerror(errno));
1335                 return 0;
1336         }
1337
1338         /* Module has been found */
1339         return 1;
1340 }