1 /*- 2 * Copyright (c) 2004 Marcel Moolenaar 3 * Copyright (c) 2001 Doug Rabson 4 * Copyright (c) 2016, 2018 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * Portions of this software were developed by Konstantin Belousov 8 * under sponsorship from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #include "opt_acpi.h" 34 35 #include <sys/param.h> 36 #include <sys/efi.h> 37 #include <sys/eventhandler.h> 38 #include <sys/kernel.h> 39 #include <sys/linker.h> 40 #include <sys/lock.h> 41 #include <sys/malloc.h> 42 #include <sys/module.h> 43 #include <sys/msan.h> 44 #include <sys/mutex.h> 45 #include <sys/clock.h> 46 #include <sys/proc.h> 47 #include <sys/reboot.h> 48 #include <sys/rwlock.h> 49 #include <sys/sched.h> 50 #include <sys/sysctl.h> 51 #include <sys/systm.h> 52 #include <sys/uio.h> 53 #include <sys/vmmeter.h> 54 55 #include <machine/fpu.h> 56 #include <machine/efi.h> 57 #include <machine/metadata.h> 58 #include <machine/vmparam.h> 59 60 #include <vm/vm.h> 61 #include <vm/pmap.h> 62 #include <vm/vm_map.h> 63 64 #ifdef DEV_ACPI 65 #include <contrib/dev/acpica/include/acpi.h> 66 #endif 67 68 #define EFI_TABLE_ALLOC_MAX 0x800000 69 70 static struct efi_systbl *efi_systbl; 71 static eventhandler_tag efi_shutdown_tag; 72 /* 73 * The following pointers point to tables in the EFI runtime service data pages. 74 * Care should be taken to make sure that we've properly entered the EFI runtime 75 * environment (efi_enter()) before dereferencing them. 76 */ 77 static struct efi_cfgtbl *efi_cfgtbl; 78 static struct efi_rt *efi_runtime; 79 80 static int efi_status2err[25] = { 81 0, /* EFI_SUCCESS */ 82 ENOEXEC, /* EFI_LOAD_ERROR */ 83 EINVAL, /* EFI_INVALID_PARAMETER */ 84 ENOSYS, /* EFI_UNSUPPORTED */ 85 EMSGSIZE, /* EFI_BAD_BUFFER_SIZE */ 86 EOVERFLOW, /* EFI_BUFFER_TOO_SMALL */ 87 EBUSY, /* EFI_NOT_READY */ 88 EIO, /* EFI_DEVICE_ERROR */ 89 EROFS, /* EFI_WRITE_PROTECTED */ 90 EAGAIN, /* EFI_OUT_OF_RESOURCES */ 91 EIO, /* EFI_VOLUME_CORRUPTED */ 92 ENOSPC, /* EFI_VOLUME_FULL */ 93 ENXIO, /* EFI_NO_MEDIA */ 94 ESTALE, /* EFI_MEDIA_CHANGED */ 95 ENOENT, /* EFI_NOT_FOUND */ 96 EACCES, /* EFI_ACCESS_DENIED */ 97 ETIMEDOUT, /* EFI_NO_RESPONSE */ 98 EADDRNOTAVAIL, /* EFI_NO_MAPPING */ 99 ETIMEDOUT, /* EFI_TIMEOUT */ 100 EDOOFUS, /* EFI_NOT_STARTED */ 101 EALREADY, /* EFI_ALREADY_STARTED */ 102 ECANCELED, /* EFI_ABORTED */ 103 EPROTO, /* EFI_ICMP_ERROR */ 104 EPROTO, /* EFI_TFTP_ERROR */ 105 EPROTO /* EFI_PROTOCOL_ERROR */ 106 }; 107 108 enum efi_table_type { 109 TYPE_ESRT = 0, 110 TYPE_PROP 111 }; 112 113 static int efi_enter(void); 114 static void efi_leave(void); 115 116 int 117 efi_status_to_errno(efi_status status) 118 { 119 u_long code; 120 121 code = status & 0x3ffffffffffffffful; 122 return (code < nitems(efi_status2err) ? efi_status2err[code] : EDOOFUS); 123 } 124 125 static struct mtx efi_lock; 126 static SYSCTL_NODE(_hw, OID_AUTO, efi, CTLFLAG_RWTUN | CTLFLAG_MPSAFE, NULL, 127 "EFI"); 128 static bool efi_poweroff = true; 129 SYSCTL_BOOL(_hw_efi, OID_AUTO, poweroff, CTLFLAG_RWTUN, &efi_poweroff, 0, 130 "If true, use EFI runtime services to power off in preference to ACPI"); 131 132 static bool 133 efi_is_in_map(struct efi_md *map, int ndesc, int descsz, vm_offset_t addr) 134 { 135 struct efi_md *p; 136 int i; 137 138 for (i = 0, p = map; i < ndesc; i++, p = efi_next_descriptor(p, 139 descsz)) { 140 if ((p->md_attr & EFI_MD_ATTR_RT) == 0) 141 continue; 142 143 if (addr >= p->md_virt && 144 addr < p->md_virt + p->md_pages * EFI_PAGE_SIZE) 145 return (true); 146 } 147 148 return (false); 149 } 150 151 static void 152 efi_shutdown_final(void *dummy __unused, int howto) 153 { 154 155 /* 156 * On some systems, ACPI S5 is missing or does not function properly. 157 * When present, shutdown via EFI Runtime Services instead, unless 158 * disabled. 159 */ 160 if ((howto & RB_POWEROFF) != 0 && efi_poweroff) 161 (void)efi_reset_system(EFI_RESET_SHUTDOWN); 162 } 163 164 static int 165 efi_init(void) 166 { 167 struct efi_map_header *efihdr; 168 struct efi_md *map; 169 struct efi_rt *rtdm; 170 size_t efisz; 171 int ndesc, rt_disabled; 172 173 rt_disabled = 0; 174 TUNABLE_INT_FETCH("efi.rt.disabled", &rt_disabled); 175 if (rt_disabled == 1) 176 return (0); 177 mtx_init(&efi_lock, "efi", NULL, MTX_DEF); 178 179 if (efi_systbl_phys == 0) { 180 if (bootverbose) 181 printf("EFI systbl not available\n"); 182 return (0); 183 } 184 185 efi_systbl = (struct efi_systbl *)efi_phys_to_kva(efi_systbl_phys); 186 if (efi_systbl == NULL || efi_systbl->st_hdr.th_sig != EFI_SYSTBL_SIG) { 187 efi_systbl = NULL; 188 if (bootverbose) 189 printf("EFI systbl signature invalid\n"); 190 return (0); 191 } 192 efi_cfgtbl = (efi_systbl->st_cfgtbl == 0) ? NULL : 193 (struct efi_cfgtbl *)efi_systbl->st_cfgtbl; 194 if (efi_cfgtbl == NULL) { 195 if (bootverbose) 196 printf("EFI config table is not present\n"); 197 } 198 199 efihdr = (struct efi_map_header *)preload_search_info(preload_kmdp, 200 MODINFO_METADATA | MODINFOMD_EFI_MAP); 201 if (efihdr == NULL) { 202 if (bootverbose) 203 printf("EFI map is not present\n"); 204 return (0); 205 } 206 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf; 207 map = (struct efi_md *)((uint8_t *)efihdr + efisz); 208 if (efihdr->descriptor_size == 0) 209 return (ENOMEM); 210 211 ndesc = efihdr->memory_size / efihdr->descriptor_size; 212 if (!efi_create_1t1_map(map, ndesc, efihdr->descriptor_size)) { 213 if (bootverbose) 214 printf("EFI cannot create runtime map\n"); 215 return (ENOMEM); 216 } 217 218 efi_runtime = (efi_systbl->st_rt == 0) ? NULL : 219 (struct efi_rt *)efi_systbl->st_rt; 220 if (efi_runtime == NULL) { 221 if (bootverbose) 222 printf("EFI runtime services table is not present\n"); 223 efi_destroy_1t1_map(); 224 return (ENXIO); 225 } 226 227 #if defined(__aarch64__) || defined(__amd64__) 228 /* 229 * Some UEFI implementations have multiple implementations of the 230 * RS->GetTime function. They switch from one we can only use early 231 * in the boot process to one valid as a RunTime service only when we 232 * call RS->SetVirtualAddressMap. As this is not always the case, e.g. 233 * with an old loader.efi, check if the RS->GetTime function is within 234 * the EFI map, and fail to attach if not. 235 */ 236 rtdm = (struct efi_rt *)efi_phys_to_kva((uintptr_t)efi_runtime); 237 if (rtdm == NULL || !efi_is_in_map(map, ndesc, efihdr->descriptor_size, 238 (vm_offset_t)rtdm->rt_gettime)) { 239 if (bootverbose) 240 printf( 241 "EFI runtime services table has an invalid pointer\n"); 242 efi_runtime = NULL; 243 efi_destroy_1t1_map(); 244 return (ENXIO); 245 } 246 #endif 247 248 /* 249 * We use SHUTDOWN_PRI_LAST - 1 to trigger after IPMI, but before ACPI. 250 */ 251 efi_shutdown_tag = EVENTHANDLER_REGISTER(shutdown_final, 252 efi_shutdown_final, NULL, SHUTDOWN_PRI_LAST - 1); 253 254 return (0); 255 } 256 257 static void 258 efi_uninit(void) 259 { 260 261 /* Most likely disabled by tunable */ 262 if (efi_runtime == NULL) 263 return; 264 if (efi_shutdown_tag != NULL) 265 EVENTHANDLER_DEREGISTER(shutdown_final, efi_shutdown_tag); 266 efi_destroy_1t1_map(); 267 268 efi_systbl = NULL; 269 efi_cfgtbl = NULL; 270 efi_runtime = NULL; 271 272 mtx_destroy(&efi_lock); 273 } 274 275 static int 276 rt_ok(void) 277 { 278 279 if (efi_runtime == NULL) 280 return (ENXIO); 281 return (0); 282 } 283 284 /* 285 * The fpu_kern_enter() call in allows firmware to use FPU, as 286 * mandated by the specification. It also enters a critical section, 287 * giving us neccessary protection against context switches. 288 */ 289 static int 290 efi_enter(void) 291 { 292 struct thread *td; 293 pmap_t curpmap; 294 int error; 295 296 if (efi_runtime == NULL) 297 return (ENXIO); 298 td = curthread; 299 curpmap = &td->td_proc->p_vmspace->vm_pmap; 300 PMAP_LOCK(curpmap); 301 mtx_lock(&efi_lock); 302 fpu_kern_enter(td, NULL, FPU_KERN_NOCTX); 303 error = efi_arch_enter(); 304 if (error != 0) { 305 fpu_kern_leave(td, NULL); 306 mtx_unlock(&efi_lock); 307 PMAP_UNLOCK(curpmap); 308 } else { 309 MPASS((td->td_pflags & TDP_EFIRT) == 0); 310 td->td_pflags |= TDP_EFIRT; 311 } 312 return (error); 313 } 314 315 static void 316 efi_leave(void) 317 { 318 struct thread *td; 319 pmap_t curpmap; 320 321 td = curthread; 322 MPASS((td->td_pflags & TDP_EFIRT) != 0); 323 td->td_pflags &= ~TDP_EFIRT; 324 325 efi_arch_leave(); 326 327 curpmap = &curproc->p_vmspace->vm_pmap; 328 fpu_kern_leave(td, NULL); 329 mtx_unlock(&efi_lock); 330 PMAP_UNLOCK(curpmap); 331 } 332 333 static int 334 get_table(struct uuid *uuid, void **ptr) 335 { 336 struct efi_cfgtbl *ct; 337 u_long count; 338 int error; 339 340 if (efi_cfgtbl == NULL || efi_systbl == NULL) 341 return (ENXIO); 342 error = efi_enter(); 343 if (error != 0) 344 return (error); 345 count = efi_systbl->st_entries; 346 ct = efi_cfgtbl; 347 while (count--) { 348 if (!bcmp(&ct->ct_uuid, uuid, sizeof(*uuid))) { 349 *ptr = ct->ct_data; 350 efi_leave(); 351 return (0); 352 } 353 ct++; 354 } 355 356 efi_leave(); 357 return (ENOENT); 358 } 359 360 static int 361 get_table_length(enum efi_table_type type, size_t *table_len, void **taddr) 362 { 363 switch (type) { 364 case TYPE_ESRT: 365 { 366 struct efi_esrt_table *esrt = NULL; 367 struct uuid uuid = EFI_TABLE_ESRT; 368 uint32_t fw_resource_count = 0; 369 size_t len = sizeof(*esrt); 370 int error; 371 void *buf; 372 373 error = efi_get_table(&uuid, (void **)&esrt); 374 if (error != 0) 375 return (error); 376 377 buf = malloc(len, M_TEMP, M_WAITOK); 378 error = physcopyout((vm_paddr_t)esrt, buf, len); 379 if (error != 0) { 380 free(buf, M_TEMP); 381 return (error); 382 } 383 384 /* Check ESRT version */ 385 if (((struct efi_esrt_table *)buf)->fw_resource_version != 386 ESRT_FIRMWARE_RESOURCE_VERSION) { 387 free(buf, M_TEMP); 388 return (ENODEV); 389 } 390 391 fw_resource_count = ((struct efi_esrt_table *)buf)-> 392 fw_resource_count; 393 if (fw_resource_count > EFI_TABLE_ALLOC_MAX / 394 sizeof(struct efi_esrt_entry_v1)) { 395 free(buf, M_TEMP); 396 return (ENOMEM); 397 } 398 399 len += fw_resource_count * sizeof(struct efi_esrt_entry_v1); 400 *table_len = len; 401 402 if (taddr != NULL) 403 *taddr = esrt; 404 free(buf, M_TEMP); 405 return (0); 406 } 407 case TYPE_PROP: 408 { 409 struct uuid uuid = EFI_PROPERTIES_TABLE; 410 struct efi_prop_table *prop; 411 size_t len = sizeof(*prop); 412 uint32_t prop_len; 413 int error; 414 void *buf; 415 416 error = efi_get_table(&uuid, (void **)&prop); 417 if (error != 0) 418 return (error); 419 420 buf = malloc(len, M_TEMP, M_WAITOK); 421 error = physcopyout((vm_paddr_t)prop, buf, len); 422 if (error != 0) { 423 free(buf, M_TEMP); 424 return (error); 425 } 426 427 prop_len = ((struct efi_prop_table *)buf)->length; 428 if (prop_len > EFI_TABLE_ALLOC_MAX) { 429 free(buf, M_TEMP); 430 return (ENOMEM); 431 } 432 *table_len = prop_len; 433 434 if (taddr != NULL) 435 *taddr = prop; 436 free(buf, M_TEMP); 437 return (0); 438 } 439 } 440 return (ENOENT); 441 } 442 443 static int 444 copy_table(struct uuid *uuid, void **buf, size_t buf_len, size_t *table_len) 445 { 446 static const struct known_table { 447 struct uuid uuid; 448 enum efi_table_type type; 449 } tables[] = { 450 { EFI_TABLE_ESRT, TYPE_ESRT }, 451 { EFI_PROPERTIES_TABLE, TYPE_PROP } 452 }; 453 size_t table_idx; 454 void *taddr; 455 int rc; 456 457 for (table_idx = 0; table_idx < nitems(tables); table_idx++) { 458 if (!bcmp(&tables[table_idx].uuid, uuid, sizeof(*uuid))) 459 break; 460 } 461 462 if (table_idx == nitems(tables)) 463 return (EINVAL); 464 465 rc = get_table_length(tables[table_idx].type, table_len, &taddr); 466 if (rc != 0) 467 return rc; 468 469 /* return table length to userspace */ 470 if (buf == NULL) 471 return (0); 472 473 *buf = malloc(*table_len, M_TEMP, M_WAITOK); 474 rc = physcopyout((vm_paddr_t)taddr, *buf, *table_len); 475 return (rc); 476 } 477 478 static int efi_rt_handle_faults = EFI_RT_HANDLE_FAULTS_DEFAULT; 479 SYSCTL_INT(_machdep, OID_AUTO, efi_rt_handle_faults, CTLFLAG_RWTUN, 480 &efi_rt_handle_faults, 0, 481 "Call EFI RT methods with fault handler wrapper around"); 482 483 static int 484 efi_rt_arch_call_nofault(struct efirt_callinfo *ec) 485 { 486 487 switch (ec->ec_argcnt) { 488 case 0: 489 ec->ec_efi_status = ((register_t EFIABI_ATTR (*)(void)) 490 ec->ec_fptr)(); 491 break; 492 case 1: 493 ec->ec_efi_status = ((register_t EFIABI_ATTR (*)(register_t)) 494 ec->ec_fptr)(ec->ec_arg1); 495 break; 496 case 2: 497 ec->ec_efi_status = ((register_t EFIABI_ATTR (*)(register_t, 498 register_t))ec->ec_fptr)(ec->ec_arg1, ec->ec_arg2); 499 break; 500 case 3: 501 ec->ec_efi_status = ((register_t EFIABI_ATTR (*)(register_t, 502 register_t, register_t))ec->ec_fptr)(ec->ec_arg1, 503 ec->ec_arg2, ec->ec_arg3); 504 break; 505 case 4: 506 ec->ec_efi_status = ((register_t EFIABI_ATTR (*)(register_t, 507 register_t, register_t, register_t))ec->ec_fptr)( 508 ec->ec_arg1, ec->ec_arg2, ec->ec_arg3, ec->ec_arg4); 509 break; 510 case 5: 511 ec->ec_efi_status = ((register_t EFIABI_ATTR (*)(register_t, 512 register_t, register_t, register_t, register_t)) 513 ec->ec_fptr)(ec->ec_arg1, ec->ec_arg2, ec->ec_arg3, 514 ec->ec_arg4, ec->ec_arg5); 515 break; 516 default: 517 panic("efi_rt_arch_call: %d args", (int)ec->ec_argcnt); 518 } 519 520 return (0); 521 } 522 523 static int 524 efi_call(struct efirt_callinfo *ecp) 525 { 526 int error; 527 528 error = efi_enter(); 529 if (error != 0) 530 return (error); 531 error = efi_rt_handle_faults ? efi_rt_arch_call(ecp) : 532 efi_rt_arch_call_nofault(ecp); 533 efi_leave(); 534 if (error == 0) 535 error = efi_status_to_errno(ecp->ec_efi_status); 536 else if (bootverbose) 537 printf("EFI %s call faulted, error %d\n", ecp->ec_name, error); 538 return (error); 539 } 540 541 #define EFI_RT_METHOD_PA(method) \ 542 ((uintptr_t)((struct efi_rt *)efi_phys_to_kva((uintptr_t) \ 543 efi_runtime))->method) 544 545 static int 546 efi_get_time_locked(struct efi_tm *tm, struct efi_tmcap *tmcap) 547 { 548 struct efirt_callinfo ec; 549 int error; 550 551 EFI_TIME_OWNED(); 552 if (efi_runtime == NULL) 553 return (ENXIO); 554 bzero(&ec, sizeof(ec)); 555 ec.ec_name = "rt_gettime"; 556 ec.ec_argcnt = 2; 557 ec.ec_arg1 = (uintptr_t)tm; 558 ec.ec_arg2 = (uintptr_t)tmcap; 559 ec.ec_fptr = EFI_RT_METHOD_PA(rt_gettime); 560 error = efi_call(&ec); 561 if (error == 0) 562 kmsan_mark(tm, sizeof(*tm), KMSAN_STATE_INITED); 563 return (error); 564 } 565 566 static int 567 get_time(struct efi_tm *tm) 568 { 569 struct efi_tmcap dummy; 570 int error; 571 572 if (efi_runtime == NULL) 573 return (ENXIO); 574 EFI_TIME_LOCK(); 575 /* 576 * UEFI spec states that the Capabilities argument to GetTime is 577 * optional, but some UEFI implementations choke when passed a NULL 578 * pointer. Pass a dummy efi_tmcap, even though we won't use it, 579 * to workaround such implementations. 580 */ 581 error = efi_get_time_locked(tm, &dummy); 582 EFI_TIME_UNLOCK(); 583 return (error); 584 } 585 586 static int 587 get_waketime(uint8_t *enabled, uint8_t *pending, struct efi_tm *tm) 588 { 589 struct efirt_callinfo ec; 590 int error; 591 #ifdef DEV_ACPI 592 UINT32 acpiRtcEnabled; 593 #endif 594 595 if (efi_runtime == NULL) 596 return (ENXIO); 597 598 EFI_TIME_LOCK(); 599 bzero(&ec, sizeof(ec)); 600 ec.ec_name = "rt_getwaketime"; 601 ec.ec_argcnt = 3; 602 ec.ec_arg1 = (uintptr_t)enabled; 603 ec.ec_arg2 = (uintptr_t)pending; 604 ec.ec_arg3 = (uintptr_t)tm; 605 ec.ec_fptr = EFI_RT_METHOD_PA(rt_getwaketime); 606 error = efi_call(&ec); 607 EFI_TIME_UNLOCK(); 608 609 #ifdef DEV_ACPI 610 if (error == 0) { 611 error = AcpiReadBitRegister(ACPI_BITREG_RT_CLOCK_ENABLE, 612 &acpiRtcEnabled); 613 if (ACPI_SUCCESS(error)) { 614 *enabled = *enabled && acpiRtcEnabled; 615 } else 616 error = EIO; 617 } 618 #endif 619 620 return (error); 621 } 622 623 static int 624 set_waketime(uint8_t enable, struct efi_tm *tm) 625 { 626 struct efirt_callinfo ec; 627 int error; 628 629 if (efi_runtime == NULL) 630 return (ENXIO); 631 632 EFI_TIME_LOCK(); 633 bzero(&ec, sizeof(ec)); 634 ec.ec_name = "rt_setwaketime"; 635 ec.ec_argcnt = 2; 636 ec.ec_arg1 = (uintptr_t)enable; 637 ec.ec_arg2 = (uintptr_t)tm; 638 ec.ec_fptr = EFI_RT_METHOD_PA(rt_setwaketime); 639 error = efi_call(&ec); 640 EFI_TIME_UNLOCK(); 641 642 #ifdef DEV_ACPI 643 if (error == 0) { 644 error = AcpiWriteBitRegister(ACPI_BITREG_RT_CLOCK_ENABLE, 645 (enable != 0) ? 1 : 0); 646 if (ACPI_FAILURE(error)) 647 error = EIO; 648 } 649 #endif 650 651 return (error); 652 } 653 654 static int 655 get_time_capabilities(struct efi_tmcap *tmcap) 656 { 657 struct efi_tm dummy; 658 int error; 659 660 if (efi_runtime == NULL) 661 return (ENXIO); 662 EFI_TIME_LOCK(); 663 error = efi_get_time_locked(&dummy, tmcap); 664 EFI_TIME_UNLOCK(); 665 return (error); 666 } 667 668 static int 669 reset_system(enum efi_reset type) 670 { 671 struct efirt_callinfo ec; 672 673 switch (type) { 674 case EFI_RESET_COLD: 675 case EFI_RESET_WARM: 676 case EFI_RESET_SHUTDOWN: 677 break; 678 default: 679 return (EINVAL); 680 } 681 if (efi_runtime == NULL) 682 return (ENXIO); 683 bzero(&ec, sizeof(ec)); 684 ec.ec_name = "rt_reset"; 685 ec.ec_argcnt = 4; 686 ec.ec_arg1 = (uintptr_t)type; 687 ec.ec_arg2 = (uintptr_t)0; 688 ec.ec_arg3 = (uintptr_t)0; 689 ec.ec_arg4 = (uintptr_t)NULL; 690 ec.ec_fptr = EFI_RT_METHOD_PA(rt_reset); 691 return (efi_call(&ec)); 692 } 693 694 static int 695 efi_set_time_locked(struct efi_tm *tm) 696 { 697 struct efirt_callinfo ec; 698 699 EFI_TIME_OWNED(); 700 if (efi_runtime == NULL) 701 return (ENXIO); 702 bzero(&ec, sizeof(ec)); 703 ec.ec_name = "rt_settime"; 704 ec.ec_argcnt = 1; 705 ec.ec_arg1 = (uintptr_t)tm; 706 ec.ec_fptr = EFI_RT_METHOD_PA(rt_settime); 707 return (efi_call(&ec)); 708 } 709 710 static int 711 set_time(struct efi_tm *tm) 712 { 713 int error; 714 715 if (efi_runtime == NULL) 716 return (ENXIO); 717 EFI_TIME_LOCK(); 718 error = efi_set_time_locked(tm); 719 EFI_TIME_UNLOCK(); 720 return (error); 721 } 722 723 static int 724 var_get(efi_char *name, struct uuid *vendor, uint32_t *attrib, 725 size_t *datasize, void *data) 726 { 727 struct efirt_callinfo ec; 728 int error; 729 730 if (efi_runtime == NULL) 731 return (ENXIO); 732 bzero(&ec, sizeof(ec)); 733 ec.ec_argcnt = 5; 734 ec.ec_name = "rt_getvar"; 735 ec.ec_arg1 = (uintptr_t)name; 736 ec.ec_arg2 = (uintptr_t)vendor; 737 ec.ec_arg3 = (uintptr_t)attrib; 738 ec.ec_arg4 = (uintptr_t)datasize; 739 ec.ec_arg5 = (uintptr_t)data; 740 ec.ec_fptr = EFI_RT_METHOD_PA(rt_getvar); 741 error = efi_call(&ec); 742 if (error == 0) 743 kmsan_mark(data, *datasize, KMSAN_STATE_INITED); 744 return (error); 745 } 746 747 static int 748 var_nextname(size_t *namesize, efi_char *name, struct uuid *vendor) 749 { 750 struct efirt_callinfo ec; 751 int error; 752 753 if (efi_runtime == NULL) 754 return (ENXIO); 755 bzero(&ec, sizeof(ec)); 756 ec.ec_argcnt = 3; 757 ec.ec_name = "rt_scanvar"; 758 ec.ec_arg1 = (uintptr_t)namesize; 759 ec.ec_arg2 = (uintptr_t)name; 760 ec.ec_arg3 = (uintptr_t)vendor; 761 ec.ec_fptr = EFI_RT_METHOD_PA(rt_scanvar); 762 error = efi_call(&ec); 763 if (error == 0) 764 kmsan_mark(name, *namesize, KMSAN_STATE_INITED); 765 return (error); 766 } 767 768 static int 769 var_set(efi_char *name, struct uuid *vendor, uint32_t attrib, 770 size_t datasize, void *data) 771 { 772 struct efirt_callinfo ec; 773 774 if (efi_runtime == NULL) 775 return (ENXIO); 776 bzero(&ec, sizeof(ec)); 777 ec.ec_argcnt = 5; 778 ec.ec_name = "rt_setvar"; 779 ec.ec_arg1 = (uintptr_t)name; 780 ec.ec_arg2 = (uintptr_t)vendor; 781 ec.ec_arg3 = (uintptr_t)attrib; 782 ec.ec_arg4 = (uintptr_t)datasize; 783 ec.ec_arg5 = (uintptr_t)data; 784 ec.ec_fptr = EFI_RT_METHOD_PA(rt_setvar); 785 return (efi_call(&ec)); 786 } 787 788 const static struct efi_ops efi_ops = { 789 .rt_ok = rt_ok, 790 .get_table = get_table, 791 .copy_table = copy_table, 792 .get_time = get_time, 793 .get_time_capabilities = get_time_capabilities, 794 .reset_system = reset_system, 795 .set_time = set_time, 796 .get_waketime = get_waketime, 797 .set_waketime = set_waketime, 798 .var_get = var_get, 799 .var_nextname = var_nextname, 800 .var_set = var_set, 801 }; 802 const struct efi_ops *active_efi_ops = &efi_ops; 803 804 static int 805 efirt_modevents(module_t m, int event, void *arg __unused) 806 { 807 808 switch (event) { 809 case MOD_LOAD: 810 return (efi_init()); 811 812 case MOD_UNLOAD: 813 efi_uninit(); 814 return (0); 815 816 case MOD_SHUTDOWN: 817 return (0); 818 819 default: 820 return (EOPNOTSUPP); 821 } 822 } 823 824 static moduledata_t efirt_moddata = { 825 .name = "efirt", 826 .evhand = efirt_modevents, 827 .priv = NULL, 828 }; 829 /* After fpuinitstate, before efidev */ 830 DECLARE_MODULE(efirt, efirt_moddata, SI_SUB_DRIVERS, SI_ORDER_SECOND); 831 MODULE_VERSION(efirt, 1); 832