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 caddr_t kmdp; 171 size_t efisz; 172 int ndesc, rt_disabled; 173 174 rt_disabled = 0; 175 TUNABLE_INT_FETCH("efi.rt.disabled", &rt_disabled); 176 if (rt_disabled == 1) 177 return (0); 178 mtx_init(&efi_lock, "efi", NULL, MTX_DEF); 179 180 if (efi_systbl_phys == 0) { 181 if (bootverbose) 182 printf("EFI systbl not available\n"); 183 return (0); 184 } 185 186 efi_systbl = (struct efi_systbl *)efi_phys_to_kva(efi_systbl_phys); 187 if (efi_systbl == NULL || efi_systbl->st_hdr.th_sig != EFI_SYSTBL_SIG) { 188 efi_systbl = NULL; 189 if (bootverbose) 190 printf("EFI systbl signature invalid\n"); 191 return (0); 192 } 193 efi_cfgtbl = (efi_systbl->st_cfgtbl == 0) ? NULL : 194 (struct efi_cfgtbl *)efi_systbl->st_cfgtbl; 195 if (efi_cfgtbl == NULL) { 196 if (bootverbose) 197 printf("EFI config table is not present\n"); 198 } 199 200 kmdp = preload_search_by_type("elf kernel"); 201 if (kmdp == NULL) 202 kmdp = preload_search_by_type("elf64 kernel"); 203 efihdr = (struct efi_map_header *)preload_search_info(kmdp, 204 MODINFO_METADATA | MODINFOMD_EFI_MAP); 205 if (efihdr == NULL) { 206 if (bootverbose) 207 printf("EFI map is not present\n"); 208 return (0); 209 } 210 efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf; 211 map = (struct efi_md *)((uint8_t *)efihdr + efisz); 212 if (efihdr->descriptor_size == 0) 213 return (ENOMEM); 214 215 ndesc = efihdr->memory_size / efihdr->descriptor_size; 216 if (!efi_create_1t1_map(map, ndesc, efihdr->descriptor_size)) { 217 if (bootverbose) 218 printf("EFI cannot create runtime map\n"); 219 return (ENOMEM); 220 } 221 222 efi_runtime = (efi_systbl->st_rt == 0) ? NULL : 223 (struct efi_rt *)efi_systbl->st_rt; 224 if (efi_runtime == NULL) { 225 if (bootverbose) 226 printf("EFI runtime services table is not present\n"); 227 efi_destroy_1t1_map(); 228 return (ENXIO); 229 } 230 231 #if defined(__aarch64__) || defined(__amd64__) 232 /* 233 * Some UEFI implementations have multiple implementations of the 234 * RS->GetTime function. They switch from one we can only use early 235 * in the boot process to one valid as a RunTime service only when we 236 * call RS->SetVirtualAddressMap. As this is not always the case, e.g. 237 * with an old loader.efi, check if the RS->GetTime function is within 238 * the EFI map, and fail to attach if not. 239 */ 240 rtdm = (struct efi_rt *)efi_phys_to_kva((uintptr_t)efi_runtime); 241 if (rtdm == NULL || !efi_is_in_map(map, ndesc, efihdr->descriptor_size, 242 (vm_offset_t)rtdm->rt_gettime)) { 243 if (bootverbose) 244 printf( 245 "EFI runtime services table has an invalid pointer\n"); 246 efi_runtime = NULL; 247 efi_destroy_1t1_map(); 248 return (ENXIO); 249 } 250 #endif 251 252 /* 253 * We use SHUTDOWN_PRI_LAST - 1 to trigger after IPMI, but before ACPI. 254 */ 255 efi_shutdown_tag = EVENTHANDLER_REGISTER(shutdown_final, 256 efi_shutdown_final, NULL, SHUTDOWN_PRI_LAST - 1); 257 258 return (0); 259 } 260 261 static void 262 efi_uninit(void) 263 { 264 265 /* Most likely disabled by tunable */ 266 if (efi_runtime == NULL) 267 return; 268 if (efi_shutdown_tag != NULL) 269 EVENTHANDLER_DEREGISTER(shutdown_final, efi_shutdown_tag); 270 efi_destroy_1t1_map(); 271 272 efi_systbl = NULL; 273 efi_cfgtbl = NULL; 274 efi_runtime = NULL; 275 276 mtx_destroy(&efi_lock); 277 } 278 279 static int 280 rt_ok(void) 281 { 282 283 if (efi_runtime == NULL) 284 return (ENXIO); 285 return (0); 286 } 287 288 /* 289 * The fpu_kern_enter() call in allows firmware to use FPU, as 290 * mandated by the specification. It also enters a critical section, 291 * giving us neccessary protection against context switches. 292 */ 293 static int 294 efi_enter(void) 295 { 296 struct thread *td; 297 pmap_t curpmap; 298 int error; 299 300 if (efi_runtime == NULL) 301 return (ENXIO); 302 td = curthread; 303 curpmap = &td->td_proc->p_vmspace->vm_pmap; 304 PMAP_LOCK(curpmap); 305 mtx_lock(&efi_lock); 306 fpu_kern_enter(td, NULL, FPU_KERN_NOCTX); 307 error = efi_arch_enter(); 308 if (error != 0) { 309 fpu_kern_leave(td, NULL); 310 mtx_unlock(&efi_lock); 311 PMAP_UNLOCK(curpmap); 312 } 313 return (error); 314 } 315 316 static void 317 efi_leave(void) 318 { 319 struct thread *td; 320 pmap_t curpmap; 321 322 efi_arch_leave(); 323 324 curpmap = &curproc->p_vmspace->vm_pmap; 325 td = curthread; 326 fpu_kern_leave(td, NULL); 327 mtx_unlock(&efi_lock); 328 PMAP_UNLOCK(curpmap); 329 } 330 331 static int 332 get_table(struct uuid *uuid, void **ptr) 333 { 334 struct efi_cfgtbl *ct; 335 u_long count; 336 int error; 337 338 if (efi_cfgtbl == NULL || efi_systbl == NULL) 339 return (ENXIO); 340 error = efi_enter(); 341 if (error != 0) 342 return (error); 343 count = efi_systbl->st_entries; 344 ct = efi_cfgtbl; 345 while (count--) { 346 if (!bcmp(&ct->ct_uuid, uuid, sizeof(*uuid))) { 347 *ptr = ct->ct_data; 348 efi_leave(); 349 return (0); 350 } 351 ct++; 352 } 353 354 efi_leave(); 355 return (ENOENT); 356 } 357 358 static int 359 get_table_length(enum efi_table_type type, size_t *table_len, void **taddr) 360 { 361 switch (type) { 362 case TYPE_ESRT: 363 { 364 struct efi_esrt_table *esrt = NULL; 365 struct uuid uuid = EFI_TABLE_ESRT; 366 uint32_t fw_resource_count = 0; 367 size_t len = sizeof(*esrt); 368 int error; 369 void *buf; 370 371 error = efi_get_table(&uuid, (void **)&esrt); 372 if (error != 0) 373 return (error); 374 375 buf = malloc(len, M_TEMP, M_WAITOK); 376 error = physcopyout((vm_paddr_t)esrt, buf, len); 377 if (error != 0) { 378 free(buf, M_TEMP); 379 return (error); 380 } 381 382 /* Check ESRT version */ 383 if (((struct efi_esrt_table *)buf)->fw_resource_version != 384 ESRT_FIRMWARE_RESOURCE_VERSION) { 385 free(buf, M_TEMP); 386 return (ENODEV); 387 } 388 389 fw_resource_count = ((struct efi_esrt_table *)buf)-> 390 fw_resource_count; 391 if (fw_resource_count > EFI_TABLE_ALLOC_MAX / 392 sizeof(struct efi_esrt_entry_v1)) { 393 free(buf, M_TEMP); 394 return (ENOMEM); 395 } 396 397 len += fw_resource_count * sizeof(struct efi_esrt_entry_v1); 398 *table_len = len; 399 400 if (taddr != NULL) 401 *taddr = esrt; 402 free(buf, M_TEMP); 403 return (0); 404 } 405 case TYPE_PROP: 406 { 407 struct uuid uuid = EFI_PROPERTIES_TABLE; 408 struct efi_prop_table *prop; 409 size_t len = sizeof(*prop); 410 uint32_t prop_len; 411 int error; 412 void *buf; 413 414 error = efi_get_table(&uuid, (void **)&prop); 415 if (error != 0) 416 return (error); 417 418 buf = malloc(len, M_TEMP, M_WAITOK); 419 error = physcopyout((vm_paddr_t)prop, buf, len); 420 if (error != 0) { 421 free(buf, M_TEMP); 422 return (error); 423 } 424 425 prop_len = ((struct efi_prop_table *)buf)->length; 426 if (prop_len > EFI_TABLE_ALLOC_MAX) { 427 free(buf, M_TEMP); 428 return (ENOMEM); 429 } 430 *table_len = prop_len; 431 432 if (taddr != NULL) 433 *taddr = prop; 434 free(buf, M_TEMP); 435 return (0); 436 } 437 } 438 return (ENOENT); 439 } 440 441 static int 442 copy_table(struct uuid *uuid, void **buf, size_t buf_len, size_t *table_len) 443 { 444 static const struct known_table { 445 struct uuid uuid; 446 enum efi_table_type type; 447 } tables[] = { 448 { EFI_TABLE_ESRT, TYPE_ESRT }, 449 { EFI_PROPERTIES_TABLE, TYPE_PROP } 450 }; 451 size_t table_idx; 452 void *taddr; 453 int rc; 454 455 for (table_idx = 0; table_idx < nitems(tables); table_idx++) { 456 if (!bcmp(&tables[table_idx].uuid, uuid, sizeof(*uuid))) 457 break; 458 } 459 460 if (table_idx == nitems(tables)) 461 return (EINVAL); 462 463 rc = get_table_length(tables[table_idx].type, table_len, &taddr); 464 if (rc != 0) 465 return rc; 466 467 /* return table length to userspace */ 468 if (buf == NULL) 469 return (0); 470 471 *buf = malloc(*table_len, M_TEMP, M_WAITOK); 472 rc = physcopyout((vm_paddr_t)taddr, *buf, *table_len); 473 return (rc); 474 } 475 476 static int efi_rt_handle_faults = EFI_RT_HANDLE_FAULTS_DEFAULT; 477 SYSCTL_INT(_machdep, OID_AUTO, efi_rt_handle_faults, CTLFLAG_RWTUN, 478 &efi_rt_handle_faults, 0, 479 "Call EFI RT methods with fault handler wrapper around"); 480 481 static int 482 efi_rt_arch_call_nofault(struct efirt_callinfo *ec) 483 { 484 485 switch (ec->ec_argcnt) { 486 case 0: 487 ec->ec_efi_status = ((register_t (*)(void))ec->ec_fptr)(); 488 break; 489 case 1: 490 ec->ec_efi_status = ((register_t (*)(register_t))ec->ec_fptr) 491 (ec->ec_arg1); 492 break; 493 case 2: 494 ec->ec_efi_status = ((register_t (*)(register_t, register_t)) 495 ec->ec_fptr)(ec->ec_arg1, ec->ec_arg2); 496 break; 497 case 3: 498 ec->ec_efi_status = ((register_t (*)(register_t, register_t, 499 register_t))ec->ec_fptr)(ec->ec_arg1, ec->ec_arg2, 500 ec->ec_arg3); 501 break; 502 case 4: 503 ec->ec_efi_status = ((register_t (*)(register_t, register_t, 504 register_t, register_t))ec->ec_fptr)(ec->ec_arg1, 505 ec->ec_arg2, ec->ec_arg3, ec->ec_arg4); 506 break; 507 case 5: 508 ec->ec_efi_status = ((register_t (*)(register_t, register_t, 509 register_t, register_t, register_t))ec->ec_fptr)( 510 ec->ec_arg1, ec->ec_arg2, ec->ec_arg3, ec->ec_arg4, 511 ec->ec_arg5); 512 break; 513 default: 514 panic("efi_rt_arch_call: %d args", (int)ec->ec_argcnt); 515 } 516 517 return (0); 518 } 519 520 static int 521 efi_call(struct efirt_callinfo *ecp) 522 { 523 int error; 524 525 error = efi_enter(); 526 if (error != 0) 527 return (error); 528 error = efi_rt_handle_faults ? efi_rt_arch_call(ecp) : 529 efi_rt_arch_call_nofault(ecp); 530 efi_leave(); 531 if (error == 0) 532 error = efi_status_to_errno(ecp->ec_efi_status); 533 else if (bootverbose) 534 printf("EFI %s call faulted, error %d\n", ecp->ec_name, error); 535 return (error); 536 } 537 538 #define EFI_RT_METHOD_PA(method) \ 539 ((uintptr_t)((struct efi_rt *)efi_phys_to_kva((uintptr_t) \ 540 efi_runtime))->method) 541 542 static int 543 efi_get_time_locked(struct efi_tm *tm, struct efi_tmcap *tmcap) 544 { 545 struct efirt_callinfo ec; 546 int error; 547 548 EFI_TIME_OWNED(); 549 if (efi_runtime == NULL) 550 return (ENXIO); 551 bzero(&ec, sizeof(ec)); 552 ec.ec_name = "rt_gettime"; 553 ec.ec_argcnt = 2; 554 ec.ec_arg1 = (uintptr_t)tm; 555 ec.ec_arg2 = (uintptr_t)tmcap; 556 ec.ec_fptr = EFI_RT_METHOD_PA(rt_gettime); 557 error = efi_call(&ec); 558 if (error == 0) 559 kmsan_mark(tm, sizeof(*tm), KMSAN_STATE_INITED); 560 return (error); 561 } 562 563 static int 564 get_time(struct efi_tm *tm) 565 { 566 struct efi_tmcap dummy; 567 int error; 568 569 if (efi_runtime == NULL) 570 return (ENXIO); 571 EFI_TIME_LOCK(); 572 /* 573 * UEFI spec states that the Capabilities argument to GetTime is 574 * optional, but some UEFI implementations choke when passed a NULL 575 * pointer. Pass a dummy efi_tmcap, even though we won't use it, 576 * to workaround such implementations. 577 */ 578 error = efi_get_time_locked(tm, &dummy); 579 EFI_TIME_UNLOCK(); 580 return (error); 581 } 582 583 static int 584 get_waketime(uint8_t *enabled, uint8_t *pending, struct efi_tm *tm) 585 { 586 struct efirt_callinfo ec; 587 int error; 588 #ifdef DEV_ACPI 589 UINT32 acpiRtcEnabled; 590 #endif 591 592 if (efi_runtime == NULL) 593 return (ENXIO); 594 595 EFI_TIME_LOCK(); 596 bzero(&ec, sizeof(ec)); 597 ec.ec_name = "rt_getwaketime"; 598 ec.ec_argcnt = 3; 599 ec.ec_arg1 = (uintptr_t)enabled; 600 ec.ec_arg2 = (uintptr_t)pending; 601 ec.ec_arg3 = (uintptr_t)tm; 602 ec.ec_fptr = EFI_RT_METHOD_PA(rt_getwaketime); 603 error = efi_call(&ec); 604 EFI_TIME_UNLOCK(); 605 606 #ifdef DEV_ACPI 607 if (error == 0) { 608 error = AcpiReadBitRegister(ACPI_BITREG_RT_CLOCK_ENABLE, 609 &acpiRtcEnabled); 610 if (ACPI_SUCCESS(error)) { 611 *enabled = *enabled && acpiRtcEnabled; 612 } else 613 error = EIO; 614 } 615 #endif 616 617 return (error); 618 } 619 620 static int 621 set_waketime(uint8_t enable, struct efi_tm *tm) 622 { 623 struct efirt_callinfo ec; 624 int error; 625 626 if (efi_runtime == NULL) 627 return (ENXIO); 628 629 EFI_TIME_LOCK(); 630 bzero(&ec, sizeof(ec)); 631 ec.ec_name = "rt_setwaketime"; 632 ec.ec_argcnt = 2; 633 ec.ec_arg1 = (uintptr_t)enable; 634 ec.ec_arg2 = (uintptr_t)tm; 635 ec.ec_fptr = EFI_RT_METHOD_PA(rt_setwaketime); 636 error = efi_call(&ec); 637 EFI_TIME_UNLOCK(); 638 639 #ifdef DEV_ACPI 640 if (error == 0) { 641 error = AcpiWriteBitRegister(ACPI_BITREG_RT_CLOCK_ENABLE, 642 (enable != 0) ? 1 : 0); 643 if (ACPI_FAILURE(error)) 644 error = EIO; 645 } 646 #endif 647 648 return (error); 649 } 650 651 static int 652 get_time_capabilities(struct efi_tmcap *tmcap) 653 { 654 struct efi_tm dummy; 655 int error; 656 657 if (efi_runtime == NULL) 658 return (ENXIO); 659 EFI_TIME_LOCK(); 660 error = efi_get_time_locked(&dummy, tmcap); 661 EFI_TIME_UNLOCK(); 662 return (error); 663 } 664 665 static int 666 reset_system(enum efi_reset type) 667 { 668 struct efirt_callinfo ec; 669 670 switch (type) { 671 case EFI_RESET_COLD: 672 case EFI_RESET_WARM: 673 case EFI_RESET_SHUTDOWN: 674 break; 675 default: 676 return (EINVAL); 677 } 678 if (efi_runtime == NULL) 679 return (ENXIO); 680 bzero(&ec, sizeof(ec)); 681 ec.ec_name = "rt_reset"; 682 ec.ec_argcnt = 4; 683 ec.ec_arg1 = (uintptr_t)type; 684 ec.ec_arg2 = (uintptr_t)0; 685 ec.ec_arg3 = (uintptr_t)0; 686 ec.ec_arg4 = (uintptr_t)NULL; 687 ec.ec_fptr = EFI_RT_METHOD_PA(rt_reset); 688 return (efi_call(&ec)); 689 } 690 691 static int 692 efi_set_time_locked(struct efi_tm *tm) 693 { 694 struct efirt_callinfo ec; 695 696 EFI_TIME_OWNED(); 697 if (efi_runtime == NULL) 698 return (ENXIO); 699 bzero(&ec, sizeof(ec)); 700 ec.ec_name = "rt_settime"; 701 ec.ec_argcnt = 1; 702 ec.ec_arg1 = (uintptr_t)tm; 703 ec.ec_fptr = EFI_RT_METHOD_PA(rt_settime); 704 return (efi_call(&ec)); 705 } 706 707 static int 708 set_time(struct efi_tm *tm) 709 { 710 int error; 711 712 if (efi_runtime == NULL) 713 return (ENXIO); 714 EFI_TIME_LOCK(); 715 error = efi_set_time_locked(tm); 716 EFI_TIME_UNLOCK(); 717 return (error); 718 } 719 720 static int 721 var_get(efi_char *name, struct uuid *vendor, uint32_t *attrib, 722 size_t *datasize, void *data) 723 { 724 struct efirt_callinfo ec; 725 int error; 726 727 if (efi_runtime == NULL) 728 return (ENXIO); 729 bzero(&ec, sizeof(ec)); 730 ec.ec_argcnt = 5; 731 ec.ec_name = "rt_getvar"; 732 ec.ec_arg1 = (uintptr_t)name; 733 ec.ec_arg2 = (uintptr_t)vendor; 734 ec.ec_arg3 = (uintptr_t)attrib; 735 ec.ec_arg4 = (uintptr_t)datasize; 736 ec.ec_arg5 = (uintptr_t)data; 737 ec.ec_fptr = EFI_RT_METHOD_PA(rt_getvar); 738 error = efi_call(&ec); 739 if (error == 0) 740 kmsan_mark(data, *datasize, KMSAN_STATE_INITED); 741 return (error); 742 } 743 744 static int 745 var_nextname(size_t *namesize, efi_char *name, struct uuid *vendor) 746 { 747 struct efirt_callinfo ec; 748 int error; 749 750 if (efi_runtime == NULL) 751 return (ENXIO); 752 bzero(&ec, sizeof(ec)); 753 ec.ec_argcnt = 3; 754 ec.ec_name = "rt_scanvar"; 755 ec.ec_arg1 = (uintptr_t)namesize; 756 ec.ec_arg2 = (uintptr_t)name; 757 ec.ec_arg3 = (uintptr_t)vendor; 758 ec.ec_fptr = EFI_RT_METHOD_PA(rt_scanvar); 759 error = efi_call(&ec); 760 if (error == 0) 761 kmsan_mark(name, *namesize, KMSAN_STATE_INITED); 762 return (error); 763 } 764 765 static int 766 var_set(efi_char *name, struct uuid *vendor, uint32_t attrib, 767 size_t datasize, void *data) 768 { 769 struct efirt_callinfo ec; 770 771 if (efi_runtime == NULL) 772 return (ENXIO); 773 bzero(&ec, sizeof(ec)); 774 ec.ec_argcnt = 5; 775 ec.ec_name = "rt_setvar"; 776 ec.ec_arg1 = (uintptr_t)name; 777 ec.ec_arg2 = (uintptr_t)vendor; 778 ec.ec_arg3 = (uintptr_t)attrib; 779 ec.ec_arg4 = (uintptr_t)datasize; 780 ec.ec_arg5 = (uintptr_t)data; 781 ec.ec_fptr = EFI_RT_METHOD_PA(rt_setvar); 782 return (efi_call(&ec)); 783 } 784 785 const static struct efi_ops efi_ops = { 786 .rt_ok = rt_ok, 787 .get_table = get_table, 788 .copy_table = copy_table, 789 .get_time = get_time, 790 .get_time_capabilities = get_time_capabilities, 791 .reset_system = reset_system, 792 .set_time = set_time, 793 .get_waketime = get_waketime, 794 .set_waketime = set_waketime, 795 .var_get = var_get, 796 .var_nextname = var_nextname, 797 .var_set = var_set, 798 }; 799 const struct efi_ops *active_efi_ops = &efi_ops; 800 801 static int 802 efirt_modevents(module_t m, int event, void *arg __unused) 803 { 804 805 switch (event) { 806 case MOD_LOAD: 807 return (efi_init()); 808 809 case MOD_UNLOAD: 810 efi_uninit(); 811 return (0); 812 813 case MOD_SHUTDOWN: 814 return (0); 815 816 default: 817 return (EOPNOTSUPP); 818 } 819 } 820 821 static moduledata_t efirt_moddata = { 822 .name = "efirt", 823 .evhand = efirt_modevents, 824 .priv = NULL, 825 }; 826 /* After fpuinitstate, before efidev */ 827 DECLARE_MODULE(efirt, efirt_moddata, SI_SUB_DRIVERS, SI_ORDER_SECOND); 828 MODULE_VERSION(efirt, 1); 829