FreeBSD/Linux Kernel Cross Reference
sys/dev/efidev/efirt.c
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 __FBSDID("$FreeBSD$");
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 #define EFI_TABLE_ALLOC_MAX 0x800000
65
66 static struct efi_systbl *efi_systbl;
67 static eventhandler_tag efi_shutdown_tag;
68 /*
69 * The following pointers point to tables in the EFI runtime service data pages.
70 * Care should be taken to make sure that we've properly entered the EFI runtime
71 * environment (efi_enter()) before dereferencing them.
72 */
73 static struct efi_cfgtbl *efi_cfgtbl;
74 static struct efi_rt *efi_runtime;
75
76 static int efi_status2err[25] = {
77 0, /* EFI_SUCCESS */
78 ENOEXEC, /* EFI_LOAD_ERROR */
79 EINVAL, /* EFI_INVALID_PARAMETER */
80 ENOSYS, /* EFI_UNSUPPORTED */
81 EMSGSIZE, /* EFI_BAD_BUFFER_SIZE */
82 EOVERFLOW, /* EFI_BUFFER_TOO_SMALL */
83 EBUSY, /* EFI_NOT_READY */
84 EIO, /* EFI_DEVICE_ERROR */
85 EROFS, /* EFI_WRITE_PROTECTED */
86 EAGAIN, /* EFI_OUT_OF_RESOURCES */
87 EIO, /* EFI_VOLUME_CORRUPTED */
88 ENOSPC, /* EFI_VOLUME_FULL */
89 ENXIO, /* EFI_NO_MEDIA */
90 ESTALE, /* EFI_MEDIA_CHANGED */
91 ENOENT, /* EFI_NOT_FOUND */
92 EACCES, /* EFI_ACCESS_DENIED */
93 ETIMEDOUT, /* EFI_NO_RESPONSE */
94 EADDRNOTAVAIL, /* EFI_NO_MAPPING */
95 ETIMEDOUT, /* EFI_TIMEOUT */
96 EDOOFUS, /* EFI_NOT_STARTED */
97 EALREADY, /* EFI_ALREADY_STARTED */
98 ECANCELED, /* EFI_ABORTED */
99 EPROTO, /* EFI_ICMP_ERROR */
100 EPROTO, /* EFI_TFTP_ERROR */
101 EPROTO /* EFI_PROTOCOL_ERROR */
102 };
103
104 enum efi_table_type {
105 TYPE_ESRT = 0,
106 TYPE_PROP
107 };
108
109 static int efi_enter(void);
110 static void efi_leave(void);
111
112 int
113 efi_status_to_errno(efi_status status)
114 {
115 u_long code;
116
117 code = status & 0x3ffffffffffffffful;
118 return (code < nitems(efi_status2err) ? efi_status2err[code] : EDOOFUS);
119 }
120
121 static struct mtx efi_lock;
122 static SYSCTL_NODE(_hw, OID_AUTO, efi, CTLFLAG_RWTUN | CTLFLAG_MPSAFE, NULL,
123 "EFI");
124 static bool efi_poweroff = true;
125 SYSCTL_BOOL(_hw_efi, OID_AUTO, poweroff, CTLFLAG_RWTUN, &efi_poweroff, 0,
126 "If true, use EFI runtime services to power off in preference to ACPI");
127
128 static bool
129 efi_is_in_map(struct efi_md *map, int ndesc, int descsz, vm_offset_t addr)
130 {
131 struct efi_md *p;
132 int i;
133
134 for (i = 0, p = map; i < ndesc; i++, p = efi_next_descriptor(p,
135 descsz)) {
136 if ((p->md_attr & EFI_MD_ATTR_RT) == 0)
137 continue;
138
139 if (addr >= p->md_virt &&
140 addr < p->md_virt + p->md_pages * EFI_PAGE_SIZE)
141 return (true);
142 }
143
144 return (false);
145 }
146
147 static void
148 efi_shutdown_final(void *dummy __unused, int howto)
149 {
150
151 /*
152 * On some systems, ACPI S5 is missing or does not function properly.
153 * When present, shutdown via EFI Runtime Services instead, unless
154 * disabled.
155 */
156 if ((howto & RB_POWEROFF) != 0 && efi_poweroff)
157 (void)efi_reset_system(EFI_RESET_SHUTDOWN);
158 }
159
160 static int
161 efi_init(void)
162 {
163 struct efi_map_header *efihdr;
164 struct efi_md *map;
165 struct efi_rt *rtdm;
166 caddr_t kmdp;
167 size_t efisz;
168 int ndesc, rt_disabled;
169
170 rt_disabled = 0;
171 TUNABLE_INT_FETCH("efi.rt.disabled", &rt_disabled);
172 if (rt_disabled == 1)
173 return (0);
174 mtx_init(&efi_lock, "efi", NULL, MTX_DEF);
175
176 if (efi_systbl_phys == 0) {
177 if (bootverbose)
178 printf("EFI systbl not available\n");
179 return (0);
180 }
181
182 efi_systbl = (struct efi_systbl *)efi_phys_to_kva(efi_systbl_phys);
183 if (efi_systbl == NULL || efi_systbl->st_hdr.th_sig != EFI_SYSTBL_SIG) {
184 efi_systbl = NULL;
185 if (bootverbose)
186 printf("EFI systbl signature invalid\n");
187 return (0);
188 }
189 efi_cfgtbl = (efi_systbl->st_cfgtbl == 0) ? NULL :
190 (struct efi_cfgtbl *)efi_systbl->st_cfgtbl;
191 if (efi_cfgtbl == NULL) {
192 if (bootverbose)
193 printf("EFI config table is not present\n");
194 }
195
196 kmdp = preload_search_by_type("elf kernel");
197 if (kmdp == NULL)
198 kmdp = preload_search_by_type("elf64 kernel");
199 efihdr = (struct efi_map_header *)preload_search_info(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 static int
285 efi_enter(void)
286 {
287 struct thread *td;
288 pmap_t curpmap;
289 int error;
290
291 if (efi_runtime == NULL)
292 return (ENXIO);
293 td = curthread;
294 curpmap = &td->td_proc->p_vmspace->vm_pmap;
295 PMAP_LOCK(curpmap);
296 mtx_lock(&efi_lock);
297 fpu_kern_enter(td, NULL, FPU_KERN_NOCTX);
298 error = efi_arch_enter();
299 if (error != 0) {
300 fpu_kern_leave(td, NULL);
301 mtx_unlock(&efi_lock);
302 PMAP_UNLOCK(curpmap);
303 }
304 return (error);
305 }
306
307 static void
308 efi_leave(void)
309 {
310 struct thread *td;
311 pmap_t curpmap;
312
313 efi_arch_leave();
314
315 curpmap = &curproc->p_vmspace->vm_pmap;
316 td = curthread;
317 fpu_kern_leave(td, NULL);
318 mtx_unlock(&efi_lock);
319 PMAP_UNLOCK(curpmap);
320 }
321
322 static int
323 get_table(struct uuid *uuid, void **ptr)
324 {
325 struct efi_cfgtbl *ct;
326 u_long count;
327 int error;
328
329 if (efi_cfgtbl == NULL || efi_systbl == NULL)
330 return (ENXIO);
331 error = efi_enter();
332 if (error != 0)
333 return (error);
334 count = efi_systbl->st_entries;
335 ct = efi_cfgtbl;
336 while (count--) {
337 if (!bcmp(&ct->ct_uuid, uuid, sizeof(*uuid))) {
338 *ptr = ct->ct_data;
339 efi_leave();
340 return (0);
341 }
342 ct++;
343 }
344
345 efi_leave();
346 return (ENOENT);
347 }
348
349 static int
350 get_table_length(enum efi_table_type type, size_t *table_len, void **taddr)
351 {
352 switch (type) {
353 case TYPE_ESRT:
354 {
355 struct efi_esrt_table *esrt = NULL;
356 struct uuid uuid = EFI_TABLE_ESRT;
357 uint32_t fw_resource_count = 0;
358 size_t len = sizeof(*esrt);
359 int error;
360 void *buf;
361
362 error = efi_get_table(&uuid, (void **)&esrt);
363 if (error != 0)
364 return (error);
365
366 buf = malloc(len, M_TEMP, M_WAITOK);
367 error = physcopyout((vm_paddr_t)esrt, buf, len);
368 if (error != 0) {
369 free(buf, M_TEMP);
370 return (error);
371 }
372
373 /* Check ESRT version */
374 if (((struct efi_esrt_table *)buf)->fw_resource_version !=
375 ESRT_FIRMWARE_RESOURCE_VERSION) {
376 free(buf, M_TEMP);
377 return (ENODEV);
378 }
379
380 fw_resource_count = ((struct efi_esrt_table *)buf)->
381 fw_resource_count;
382 if (fw_resource_count > EFI_TABLE_ALLOC_MAX /
383 sizeof(struct efi_esrt_entry_v1)) {
384 free(buf, M_TEMP);
385 return (ENOMEM);
386 }
387
388 len += fw_resource_count * sizeof(struct efi_esrt_entry_v1);
389 *table_len = len;
390
391 if (taddr != NULL)
392 *taddr = esrt;
393 free(buf, M_TEMP);
394 return (0);
395 }
396 case TYPE_PROP:
397 {
398 struct uuid uuid = EFI_PROPERTIES_TABLE;
399 struct efi_prop_table *prop;
400 size_t len = sizeof(*prop);
401 uint32_t prop_len;
402 int error;
403 void *buf;
404
405 error = efi_get_table(&uuid, (void **)&prop);
406 if (error != 0)
407 return (error);
408
409 buf = malloc(len, M_TEMP, M_WAITOK);
410 error = physcopyout((vm_paddr_t)prop, buf, len);
411 if (error != 0) {
412 free(buf, M_TEMP);
413 return (error);
414 }
415
416 prop_len = ((struct efi_prop_table *)buf)->length;
417 if (prop_len > EFI_TABLE_ALLOC_MAX) {
418 free(buf, M_TEMP);
419 return (ENOMEM);
420 }
421 *table_len = prop_len;
422
423 if (taddr != NULL)
424 *taddr = prop;
425 free(buf, M_TEMP);
426 return (0);
427 }
428 }
429 return (ENOENT);
430 }
431
432 static int
433 copy_table(struct uuid *uuid, void **buf, size_t buf_len, size_t *table_len)
434 {
435 static const struct known_table {
436 struct uuid uuid;
437 enum efi_table_type type;
438 } tables[] = {
439 { EFI_TABLE_ESRT, TYPE_ESRT },
440 { EFI_PROPERTIES_TABLE, TYPE_PROP }
441 };
442 size_t table_idx;
443 void *taddr;
444 int rc;
445
446 for (table_idx = 0; table_idx < nitems(tables); table_idx++) {
447 if (!bcmp(&tables[table_idx].uuid, uuid, sizeof(*uuid)))
448 break;
449 }
450
451 if (table_idx == nitems(tables))
452 return (EINVAL);
453
454 rc = get_table_length(tables[table_idx].type, table_len, &taddr);
455 if (rc != 0)
456 return rc;
457
458 /* return table length to userspace */
459 if (buf == NULL)
460 return (0);
461
462 *buf = malloc(*table_len, M_TEMP, M_WAITOK);
463 rc = physcopyout((vm_paddr_t)taddr, *buf, *table_len);
464 return (rc);
465 }
466
467 static int efi_rt_handle_faults = EFI_RT_HANDLE_FAULTS_DEFAULT;
468 SYSCTL_INT(_machdep, OID_AUTO, efi_rt_handle_faults, CTLFLAG_RWTUN,
469 &efi_rt_handle_faults, 0,
470 "Call EFI RT methods with fault handler wrapper around");
471
472 static int
473 efi_rt_arch_call_nofault(struct efirt_callinfo *ec)
474 {
475
476 switch (ec->ec_argcnt) {
477 case 0:
478 ec->ec_efi_status = ((register_t (*)(void))ec->ec_fptr)();
479 break;
480 case 1:
481 ec->ec_efi_status = ((register_t (*)(register_t))ec->ec_fptr)
482 (ec->ec_arg1);
483 break;
484 case 2:
485 ec->ec_efi_status = ((register_t (*)(register_t, register_t))
486 ec->ec_fptr)(ec->ec_arg1, ec->ec_arg2);
487 break;
488 case 3:
489 ec->ec_efi_status = ((register_t (*)(register_t, register_t,
490 register_t))ec->ec_fptr)(ec->ec_arg1, ec->ec_arg2,
491 ec->ec_arg3);
492 break;
493 case 4:
494 ec->ec_efi_status = ((register_t (*)(register_t, register_t,
495 register_t, register_t))ec->ec_fptr)(ec->ec_arg1,
496 ec->ec_arg2, ec->ec_arg3, ec->ec_arg4);
497 break;
498 case 5:
499 ec->ec_efi_status = ((register_t (*)(register_t, register_t,
500 register_t, register_t, register_t))ec->ec_fptr)(
501 ec->ec_arg1, ec->ec_arg2, ec->ec_arg3, ec->ec_arg4,
502 ec->ec_arg5);
503 break;
504 default:
505 panic("efi_rt_arch_call: %d args", (int)ec->ec_argcnt);
506 }
507
508 return (0);
509 }
510
511 static int
512 efi_call(struct efirt_callinfo *ecp)
513 {
514 int error;
515
516 error = efi_enter();
517 if (error != 0)
518 return (error);
519 error = efi_rt_handle_faults ? efi_rt_arch_call(ecp) :
520 efi_rt_arch_call_nofault(ecp);
521 efi_leave();
522 if (error == 0)
523 error = efi_status_to_errno(ecp->ec_efi_status);
524 else if (bootverbose)
525 printf("EFI %s call faulted, error %d\n", ecp->ec_name, error);
526 return (error);
527 }
528
529 #define EFI_RT_METHOD_PA(method) \
530 ((uintptr_t)((struct efi_rt *)efi_phys_to_kva((uintptr_t) \
531 efi_runtime))->method)
532
533 static int
534 efi_get_time_locked(struct efi_tm *tm, struct efi_tmcap *tmcap)
535 {
536 struct efirt_callinfo ec;
537 int error;
538
539 EFI_TIME_OWNED();
540 if (efi_runtime == NULL)
541 return (ENXIO);
542 bzero(&ec, sizeof(ec));
543 ec.ec_name = "rt_gettime";
544 ec.ec_argcnt = 2;
545 ec.ec_arg1 = (uintptr_t)tm;
546 ec.ec_arg2 = (uintptr_t)tmcap;
547 ec.ec_fptr = EFI_RT_METHOD_PA(rt_gettime);
548 error = efi_call(&ec);
549 if (error == 0)
550 kmsan_mark(tm, sizeof(*tm), KMSAN_STATE_INITED);
551 return (error);
552 }
553
554 static int
555 get_time(struct efi_tm *tm)
556 {
557 struct efi_tmcap dummy;
558 int error;
559
560 if (efi_runtime == NULL)
561 return (ENXIO);
562 EFI_TIME_LOCK();
563 /*
564 * UEFI spec states that the Capabilities argument to GetTime is
565 * optional, but some UEFI implementations choke when passed a NULL
566 * pointer. Pass a dummy efi_tmcap, even though we won't use it,
567 * to workaround such implementations.
568 */
569 error = efi_get_time_locked(tm, &dummy);
570 EFI_TIME_UNLOCK();
571 return (error);
572 }
573
574 static int
575 get_time_capabilities(struct efi_tmcap *tmcap)
576 {
577 struct efi_tm dummy;
578 int error;
579
580 if (efi_runtime == NULL)
581 return (ENXIO);
582 EFI_TIME_LOCK();
583 error = efi_get_time_locked(&dummy, tmcap);
584 EFI_TIME_UNLOCK();
585 return (error);
586 }
587
588 static int
589 reset_system(enum efi_reset type)
590 {
591 struct efirt_callinfo ec;
592
593 switch (type) {
594 case EFI_RESET_COLD:
595 case EFI_RESET_WARM:
596 case EFI_RESET_SHUTDOWN:
597 break;
598 default:
599 return (EINVAL);
600 }
601 if (efi_runtime == NULL)
602 return (ENXIO);
603 bzero(&ec, sizeof(ec));
604 ec.ec_name = "rt_reset";
605 ec.ec_argcnt = 4;
606 ec.ec_arg1 = (uintptr_t)type;
607 ec.ec_arg2 = (uintptr_t)0;
608 ec.ec_arg3 = (uintptr_t)0;
609 ec.ec_arg4 = (uintptr_t)NULL;
610 ec.ec_fptr = EFI_RT_METHOD_PA(rt_reset);
611 return (efi_call(&ec));
612 }
613
614 static int
615 efi_set_time_locked(struct efi_tm *tm)
616 {
617 struct efirt_callinfo ec;
618
619 EFI_TIME_OWNED();
620 if (efi_runtime == NULL)
621 return (ENXIO);
622 bzero(&ec, sizeof(ec));
623 ec.ec_name = "rt_settime";
624 ec.ec_argcnt = 1;
625 ec.ec_arg1 = (uintptr_t)tm;
626 ec.ec_fptr = EFI_RT_METHOD_PA(rt_settime);
627 return (efi_call(&ec));
628 }
629
630 static int
631 set_time(struct efi_tm *tm)
632 {
633 int error;
634
635 if (efi_runtime == NULL)
636 return (ENXIO);
637 EFI_TIME_LOCK();
638 error = efi_set_time_locked(tm);
639 EFI_TIME_UNLOCK();
640 return (error);
641 }
642
643 static int
644 var_get(efi_char *name, struct uuid *vendor, uint32_t *attrib,
645 size_t *datasize, void *data)
646 {
647 struct efirt_callinfo ec;
648 int error;
649
650 if (efi_runtime == NULL)
651 return (ENXIO);
652 bzero(&ec, sizeof(ec));
653 ec.ec_argcnt = 5;
654 ec.ec_name = "rt_getvar";
655 ec.ec_arg1 = (uintptr_t)name;
656 ec.ec_arg2 = (uintptr_t)vendor;
657 ec.ec_arg3 = (uintptr_t)attrib;
658 ec.ec_arg4 = (uintptr_t)datasize;
659 ec.ec_arg5 = (uintptr_t)data;
660 ec.ec_fptr = EFI_RT_METHOD_PA(rt_getvar);
661 error = efi_call(&ec);
662 if (error == 0)
663 kmsan_mark(data, *datasize, KMSAN_STATE_INITED);
664 return (error);
665 }
666
667 static int
668 var_nextname(size_t *namesize, efi_char *name, struct uuid *vendor)
669 {
670 struct efirt_callinfo ec;
671 int error;
672
673 if (efi_runtime == NULL)
674 return (ENXIO);
675 bzero(&ec, sizeof(ec));
676 ec.ec_argcnt = 3;
677 ec.ec_name = "rt_scanvar";
678 ec.ec_arg1 = (uintptr_t)namesize;
679 ec.ec_arg2 = (uintptr_t)name;
680 ec.ec_arg3 = (uintptr_t)vendor;
681 ec.ec_fptr = EFI_RT_METHOD_PA(rt_scanvar);
682 error = efi_call(&ec);
683 if (error == 0)
684 kmsan_mark(name, *namesize, KMSAN_STATE_INITED);
685 return (error);
686 }
687
688 static int
689 var_set(efi_char *name, struct uuid *vendor, uint32_t attrib,
690 size_t datasize, void *data)
691 {
692 struct efirt_callinfo ec;
693
694 if (efi_runtime == NULL)
695 return (ENXIO);
696 bzero(&ec, sizeof(ec));
697 ec.ec_argcnt = 5;
698 ec.ec_name = "rt_setvar";
699 ec.ec_arg1 = (uintptr_t)name;
700 ec.ec_arg2 = (uintptr_t)vendor;
701 ec.ec_arg3 = (uintptr_t)attrib;
702 ec.ec_arg4 = (uintptr_t)datasize;
703 ec.ec_arg5 = (uintptr_t)data;
704 ec.ec_fptr = EFI_RT_METHOD_PA(rt_setvar);
705 return (efi_call(&ec));
706 }
707
708 const static struct efi_ops efi_ops = {
709 .rt_ok = rt_ok,
710 .get_table = get_table,
711 .copy_table = copy_table,
712 .get_time = get_time,
713 .get_time_capabilities = get_time_capabilities,
714 .reset_system = reset_system,
715 .set_time = set_time,
716 .var_get = var_get,
717 .var_nextname = var_nextname,
718 .var_set = var_set,
719 };
720 const struct efi_ops *active_efi_ops = &efi_ops;
721
722 static int
723 efirt_modevents(module_t m, int event, void *arg __unused)
724 {
725
726 switch (event) {
727 case MOD_LOAD:
728 return (efi_init());
729
730 case MOD_UNLOAD:
731 efi_uninit();
732 return (0);
733
734 case MOD_SHUTDOWN:
735 return (0);
736
737 default:
738 return (EOPNOTSUPP);
739 }
740 }
741
742 static moduledata_t efirt_moddata = {
743 .name = "efirt",
744 .evhand = efirt_modevents,
745 .priv = NULL,
746 };
747 /* After fpuinitstate, before efidev */
748 DECLARE_MODULE(efirt, efirt_moddata, SI_SUB_DRIVERS, SI_ORDER_SECOND);
749 MODULE_VERSION(efirt, 1);
Cache object: 0c2db95535edcc3b2afbde9dcc049213
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