1 // SPDX-License-Identifier: GPL-2.0+
3 * EFI application runtime services
5 * Copyright (c) 2016 Alexander Graf
12 #include <efi_loader.h>
15 /* For manual relocation support */
16 DECLARE_GLOBAL_DATA_PTR;
18 struct efi_runtime_mmio_list {
19 struct list_head link;
25 /* This list contains all runtime available mmio regions */
26 LIST_HEAD(efi_runtime_mmio);
28 static efi_status_t __efi_runtime EFIAPI efi_unimplemented(void);
31 * TODO(sjg@chromium.org): These defines and structures should come from the ELF
32 * header for each architecture (or a generic header) rather than being repeated
35 #if defined(__aarch64__)
36 #define R_RELATIVE R_AARCH64_RELATIVE
37 #define R_MASK 0xffffffffULL
39 #elif defined(__arm__)
40 #define R_RELATIVE R_ARM_RELATIVE
41 #define R_MASK 0xffULL
42 #elif defined(__i386__)
43 #define R_RELATIVE R_386_RELATIVE
44 #define R_MASK 0xffULL
45 #elif defined(__x86_64__)
46 #define R_RELATIVE R_X86_64_RELATIVE
47 #define R_MASK 0xffffffffULL
49 #elif defined(__riscv)
50 #define R_RELATIVE R_RISCV_RELATIVE
51 #define R_MASK 0xffULL
60 #if (__riscv_xlen == 32)
61 #define R_ABSOLUTE R_RISCV_32
63 #elif (__riscv_xlen == 64)
64 #define R_ABSOLUTE R_RISCV_64
67 #error unknown riscv target
70 #error Need to add relocation awareness
84 static __efi_runtime_data struct efi_mem_desc *efi_virtmap;
85 static __efi_runtime_data efi_uintn_t efi_descriptor_count;
86 static __efi_runtime_data efi_uintn_t efi_descriptor_size;
89 * EFI runtime code lives in two stages. In the first stage, U-Boot and an EFI
90 * payload are running concurrently at the same time. In this mode, we can
91 * handle a good number of runtime callbacks
94 efi_status_t efi_init_runtime_supported(void)
96 u16 efi_runtime_services_supported =
97 EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP |
98 EFI_RT_SUPPORTED_CONVERT_POINTER;
101 * This value must be synced with efi_runtime_detach_list
102 * as well as efi_runtime_services.
104 #ifdef CONFIG_EFI_HAVE_RUNTIME_RESET
105 efi_runtime_services_supported |= EFI_RT_SUPPORTED_RESET_SYSTEM;
108 return EFI_CALL(efi_set_variable(L"RuntimeServicesSupported",
109 &efi_global_variable_guid,
110 EFI_VARIABLE_BOOTSERVICE_ACCESS |
111 EFI_VARIABLE_RUNTIME_ACCESS,
112 sizeof(efi_runtime_services_supported),
113 &efi_runtime_services_supported));
117 * efi_update_table_header_crc32() - Update crc32 in table header
121 void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table)
124 table->crc32 = crc32(0, (const unsigned char *)table,
129 * efi_reset_system_boottime() - reset system at boot time
131 * This function implements the ResetSystem() runtime service before
132 * SetVirtualAddressMap() is called.
134 * See the Unified Extensible Firmware Interface (UEFI) specification for
137 * @reset_type: type of reset to perform
138 * @reset_status: status code for the reset
139 * @data_size: size of reset_data
140 * @reset_data: information about the reset
142 static void EFIAPI efi_reset_system_boottime(
143 enum efi_reset_type reset_type,
144 efi_status_t reset_status,
145 unsigned long data_size, void *reset_data)
147 struct efi_event *evt;
149 EFI_ENTRY("%d %lx %lx %p", reset_type, reset_status, data_size,
153 list_for_each_entry(evt, &efi_events, link) {
156 &efi_guid_event_group_reset_system)) {
157 efi_signal_event(evt);
161 switch (reset_type) {
164 case EFI_RESET_PLATFORM_SPECIFIC:
165 do_reset(NULL, 0, 0, NULL);
167 case EFI_RESET_SHUTDOWN:
168 #ifdef CONFIG_CMD_POWEROFF
169 do_poweroff(NULL, 0, 0, NULL);
178 * efi_get_time_boottime() - get current time at boot time
180 * This function implements the GetTime runtime service before
181 * SetVirtualAddressMap() is called.
183 * See the Unified Extensible Firmware Interface (UEFI) specification
186 * @time: pointer to structure to receive current time
187 * @capabilities: pointer to structure to receive RTC properties
188 * Returns: status code
190 static efi_status_t EFIAPI efi_get_time_boottime(
191 struct efi_time *time,
192 struct efi_time_cap *capabilities)
194 #ifdef CONFIG_EFI_GET_TIME
195 efi_status_t ret = EFI_SUCCESS;
199 EFI_ENTRY("%p %p", time, capabilities);
202 ret = EFI_INVALID_PARAMETER;
205 if (uclass_get_device(UCLASS_RTC, 0, &dev) ||
206 dm_rtc_get(dev, &tm)) {
207 ret = EFI_UNSUPPORTED;
210 if (dm_rtc_get(dev, &tm)) {
211 ret = EFI_DEVICE_ERROR;
215 memset(time, 0, sizeof(*time));
216 time->year = tm.tm_year;
217 time->month = tm.tm_mon;
218 time->day = tm.tm_mday;
219 time->hour = tm.tm_hour;
220 time->minute = tm.tm_min;
221 time->second = tm.tm_sec;
224 EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT;
225 time->timezone = EFI_UNSPECIFIED_TIMEZONE;
228 /* Set reasonable dummy values */
229 capabilities->resolution = 1; /* 1 Hz */
230 capabilities->accuracy = 100000000; /* 100 ppm */
231 capabilities->sets_to_zero = false;
234 return EFI_EXIT(ret);
236 EFI_ENTRY("%p %p", time, capabilities);
237 return EFI_EXIT(EFI_UNSUPPORTED);
241 #ifdef CONFIG_EFI_SET_TIME
244 * efi_validate_time() - checks if timestamp is valid
246 * @time: timestamp to validate
247 * Returns: 0 if timestamp is valid, 1 otherwise
249 static int efi_validate_time(struct efi_time *time)
252 time->year < 1900 || time->year > 9999 ||
253 !time->month || time->month > 12 || !time->day ||
254 time->day > rtc_month_days(time->month - 1, time->year) ||
255 time->hour > 23 || time->minute > 59 || time->second > 59 ||
256 time->nanosecond > 999999999 ||
258 ~(EFI_TIME_IN_DAYLIGHT | EFI_TIME_ADJUST_DAYLIGHT) ||
259 ((time->timezone < -1440 || time->timezone > 1440) &&
260 time->timezone != EFI_UNSPECIFIED_TIMEZONE));
266 * efi_set_time_boottime() - set current time
268 * This function implements the SetTime() runtime service before
269 * SetVirtualAddressMap() is called.
271 * See the Unified Extensible Firmware Interface (UEFI) specification
274 * @time: pointer to structure to with current time
275 * Returns: status code
277 static efi_status_t EFIAPI efi_set_time_boottime(struct efi_time *time)
279 #ifdef CONFIG_EFI_SET_TIME
280 efi_status_t ret = EFI_SUCCESS;
284 EFI_ENTRY("%p", time);
286 if (efi_validate_time(time)) {
287 ret = EFI_INVALID_PARAMETER;
291 if (uclass_get_device(UCLASS_RTC, 0, &dev)) {
292 ret = EFI_UNSUPPORTED;
296 memset(&tm, 0, sizeof(tm));
297 tm.tm_year = time->year;
298 tm.tm_mon = time->month;
299 tm.tm_mday = time->day;
300 tm.tm_hour = time->hour;
301 tm.tm_min = time->minute;
302 tm.tm_sec = time->second;
303 tm.tm_isdst = time->daylight ==
304 (EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT);
305 /* Calculate day of week */
306 rtc_calc_weekday(&tm);
308 if (dm_rtc_set(dev, &tm))
309 ret = EFI_DEVICE_ERROR;
311 return EFI_EXIT(ret);
313 EFI_ENTRY("%p", time);
314 return EFI_EXIT(EFI_UNSUPPORTED);
318 * efi_reset_system() - reset system
320 * This function implements the ResetSystem() runtime service after
321 * SetVirtualAddressMap() is called. It only executes an endless loop.
322 * Boards may override the helpers below to implement reset functionality.
324 * See the Unified Extensible Firmware Interface (UEFI) specification for
327 * @reset_type: type of reset to perform
328 * @reset_status: status code for the reset
329 * @data_size: size of reset_data
330 * @reset_data: information about the reset
332 void __weak __efi_runtime EFIAPI efi_reset_system(
333 enum efi_reset_type reset_type,
334 efi_status_t reset_status,
335 unsigned long data_size, void *reset_data)
337 /* Nothing we can do */
342 * efi_reset_system_init() - initialize the reset driver
344 * Boards may override this function to initialize the reset driver.
346 efi_status_t __weak efi_reset_system_init(void)
352 * efi_get_time() - get current time
354 * This function implements the GetTime runtime service after
355 * SetVirtualAddressMap() is called. As the U-Boot driver are not available
356 * anymore only an error code is returned.
358 * See the Unified Extensible Firmware Interface (UEFI) specification
361 * @time: pointer to structure to receive current time
362 * @capabilities: pointer to structure to receive RTC properties
363 * Returns: status code
365 efi_status_t __weak __efi_runtime EFIAPI efi_get_time(
366 struct efi_time *time,
367 struct efi_time_cap *capabilities)
369 return EFI_UNSUPPORTED;
373 * efi_set_time() - set current time
375 * This function implements the SetTime runtime service after
376 * SetVirtualAddressMap() is called. As the U-Boot driver are not available
377 * anymore only an error code is returned.
379 * See the Unified Extensible Firmware Interface (UEFI) specification
382 * @time: pointer to structure to with current time
383 * Returns: status code
385 efi_status_t __weak __efi_runtime EFIAPI efi_set_time(struct efi_time *time)
387 return EFI_UNSUPPORTED;
391 * efi_is_runtime_service_pointer() - check if pointer points to runtime table
393 * @p: pointer to check
394 * Return: true if the pointer points to a service function pointer in the
397 static bool efi_is_runtime_service_pointer(void *p)
399 return (p >= (void *)&efi_runtime_services.get_time &&
400 p <= (void *)&efi_runtime_services.query_variable_info) ||
401 p == (void *)&efi_events.prev ||
402 p == (void *)&efi_events.next;
406 * efi_runtime_detach() - detach unimplemented runtime functions
408 void efi_runtime_detach(void)
410 efi_runtime_services.reset_system = efi_reset_system;
411 efi_runtime_services.get_time = efi_get_time;
412 efi_runtime_services.set_time = efi_set_time;
415 efi_update_table_header_crc32(&efi_runtime_services.hdr);
419 * efi_set_virtual_address_map_runtime() - change from physical to virtual
422 * This function implements the SetVirtualAddressMap() runtime service after
423 * it is first called.
425 * See the Unified Extensible Firmware Interface (UEFI) specification for
428 * @memory_map_size: size of the virtual map
429 * @descriptor_size: size of an entry in the map
430 * @descriptor_version: version of the map entries
431 * @virtmap: virtual address mapping information
432 * Return: status code EFI_UNSUPPORTED
434 static __efi_runtime efi_status_t EFIAPI efi_set_virtual_address_map_runtime(
435 efi_uintn_t memory_map_size,
436 efi_uintn_t descriptor_size,
437 uint32_t descriptor_version,
438 struct efi_mem_desc *virtmap)
440 return EFI_UNSUPPORTED;
444 * efi_convert_pointer_runtime() - convert from physical to virtual pointer
446 * This function implements the ConvertPointer() runtime service after
447 * the first call to SetVirtualAddressMap().
449 * See the Unified Extensible Firmware Interface (UEFI) specification for
452 * @debug_disposition: indicates if pointer may be converted to NULL
453 * @address: pointer to be converted
454 * Return: status code EFI_UNSUPPORTED
456 static __efi_runtime efi_status_t EFIAPI efi_convert_pointer_runtime(
457 efi_uintn_t debug_disposition, void **address)
459 return EFI_UNSUPPORTED;
463 * efi_convert_pointer_runtime() - convert from physical to virtual pointer
465 * This function implements the ConvertPointer() runtime service until
466 * the first call to SetVirtualAddressMap().
468 * See the Unified Extensible Firmware Interface (UEFI) specification for
471 * @debug_disposition: indicates if pointer may be converted to NULL
472 * @address: pointer to be converted
473 * Return: status code EFI_UNSUPPORTED
475 static __efi_runtime efi_status_t EFIAPI efi_convert_pointer(
476 efi_uintn_t debug_disposition, void **address)
478 efi_physical_addr_t addr = (uintptr_t)*address;
480 efi_status_t ret = EFI_NOT_FOUND;
482 EFI_ENTRY("%zu %p", debug_disposition, address);
485 ret = EFI_UNSUPPORTED;
490 ret = EFI_INVALID_PARAMETER;
494 for (i = 0; i < efi_descriptor_count; i++) {
495 struct efi_mem_desc *map = (void *)efi_virtmap +
496 (efi_descriptor_size * i);
498 if (addr >= map->physical_start &&
499 (addr < map->physical_start
500 + (map->num_pages << EFI_PAGE_SHIFT))) {
501 *address = (void *)(uintptr_t)
502 (addr + map->virtual_start -
503 map->physical_start);
511 return EFI_EXIT(ret);
514 static __efi_runtime void efi_relocate_runtime_table(ulong offset)
519 /* Relocate the runtime services pointers */
520 patchoff = offset - gd->relocaddr;
521 for (pos = (void **)&efi_runtime_services.get_time;
522 pos <= (void **)&efi_runtime_services.query_variable_info; ++pos) {
528 * The entry for SetVirtualAddress() must point to a physical address.
529 * After the first execution the service must return EFI_UNSUPPORTED.
531 efi_runtime_services.set_virtual_address_map =
532 &efi_set_virtual_address_map_runtime;
535 * The entry for ConvertPointer() must point to a physical address.
536 * The service is not usable after SetVirtualAddress().
538 efi_runtime_services.convert_pointer = &efi_convert_pointer_runtime;
541 * TODO: Update UEFI variable RuntimeServicesSupported removing flags
542 * EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP and
543 * EFI_RT_SUPPORTED_CONVERT_POINTER as required by the UEFI spec 2.8.
547 efi_update_table_header_crc32(&efi_runtime_services.hdr);
550 /* Relocate EFI runtime to uboot_reloc_base = offset */
551 void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map)
554 struct elf_rela *rel = (void*)&__efi_runtime_rel_start;
556 struct elf_rel *rel = (void*)&__efi_runtime_rel_start;
557 static ulong lastoff = CONFIG_SYS_TEXT_BASE;
560 debug("%s: Relocating to offset=%lx\n", __func__, offset);
561 for (; (ulong)rel < (ulong)&__efi_runtime_rel_stop; rel++) {
562 ulong base = CONFIG_SYS_TEXT_BASE;
566 p = (void*)((ulong)rel->offset - base) + gd->relocaddr;
569 * The runtime services table is updated in
570 * efi_relocate_runtime_table()
572 if (map && efi_is_runtime_service_pointer(p))
575 debug("%s: rel->info=%#lx *p=%#lx rel->offset=%p\n", __func__,
576 rel->info, *p, rel->offset);
578 switch (rel->info & R_MASK) {
581 newaddr = rel->addend + offset - CONFIG_SYS_TEXT_BASE;
583 newaddr = *p - lastoff + offset;
588 ulong symidx = rel->info >> SYM_INDEX;
589 extern struct dyn_sym __dyn_sym_start[];
590 newaddr = __dyn_sym_start[symidx].addr + offset;
592 newaddr -= CONFIG_SYS_TEXT_BASE;
598 printf("%s: Unknown relocation type %llx\n",
599 __func__, rel->info & R_MASK);
603 /* Check if the relocation is inside bounds */
604 if (map && ((newaddr < map->virtual_start) ||
605 newaddr > (map->virtual_start +
606 (map->num_pages << EFI_PAGE_SHIFT)))) {
607 printf("%s: Relocation at %p is out of range (%lx)\n",
608 __func__, p, newaddr);
612 debug("%s: Setting %p to %lx\n", __func__, p, newaddr);
614 flush_dcache_range((ulong)p & ~(EFI_CACHELINE_SIZE - 1),
615 ALIGN((ulong)&p[1], EFI_CACHELINE_SIZE));
622 invalidate_icache_all();
626 * efi_set_virtual_address_map() - change from physical to virtual mapping
628 * This function implements the SetVirtualAddressMap() runtime service.
630 * See the Unified Extensible Firmware Interface (UEFI) specification for
633 * @memory_map_size: size of the virtual map
634 * @descriptor_size: size of an entry in the map
635 * @descriptor_version: version of the map entries
636 * @virtmap: virtual address mapping information
637 * Return: status code
639 static efi_status_t EFIAPI efi_set_virtual_address_map(
640 efi_uintn_t memory_map_size,
641 efi_uintn_t descriptor_size,
642 uint32_t descriptor_version,
643 struct efi_mem_desc *virtmap)
645 efi_uintn_t n = memory_map_size / descriptor_size;
647 efi_status_t ret = EFI_INVALID_PARAMETER;
648 int rt_code_sections = 0;
649 struct efi_event *event;
651 EFI_ENTRY("%zx %zx %x %p", memory_map_size, descriptor_size,
652 descriptor_version, virtmap);
654 if (descriptor_version != EFI_MEMORY_DESCRIPTOR_VERSION ||
655 descriptor_size < sizeof(struct efi_mem_desc))
658 efi_virtmap = virtmap;
659 efi_descriptor_size = descriptor_size;
660 efi_descriptor_count = n;
664 * Further down we are cheating. While really we should implement
665 * SetVirtualAddressMap() events and ConvertPointer() to allow
666 * dynamically loaded drivers to expose runtime services, we don't
669 * So let's ensure we see exactly one single runtime section, as
670 * that is the built-in one. If we see more (or less), someone must
671 * have tried adding or removing to that which we don't support yet.
672 * In that case, let's better fail rather than expose broken runtime
675 for (i = 0; i < n; i++) {
676 struct efi_mem_desc *map = (void*)virtmap +
677 (descriptor_size * i);
679 if (map->type == EFI_RUNTIME_SERVICES_CODE)
683 if (rt_code_sections != 1) {
685 * We expose exactly one single runtime code section, so
686 * something is definitely going wrong.
691 /* Notify EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE */
692 list_for_each_entry(event, &efi_events, link) {
693 if (event->notify_function)
694 EFI_CALL_VOID(event->notify_function(
695 event, event->notify_context));
698 /* Rebind mmio pointers */
699 for (i = 0; i < n; i++) {
700 struct efi_mem_desc *map = (void*)virtmap +
701 (descriptor_size * i);
702 struct list_head *lhandle;
703 efi_physical_addr_t map_start = map->physical_start;
704 efi_physical_addr_t map_len = map->num_pages << EFI_PAGE_SHIFT;
705 efi_physical_addr_t map_end = map_start + map_len;
706 u64 off = map->virtual_start - map_start;
708 /* Adjust all mmio pointers in this region */
709 list_for_each(lhandle, &efi_runtime_mmio) {
710 struct efi_runtime_mmio_list *lmmio;
712 lmmio = list_entry(lhandle,
713 struct efi_runtime_mmio_list,
715 if ((map_start <= lmmio->paddr) &&
716 (map_end >= lmmio->paddr)) {
717 uintptr_t new_addr = lmmio->paddr + off;
718 *lmmio->ptr = (void *)new_addr;
721 if ((map_start <= (uintptr_t)systab.tables) &&
722 (map_end >= (uintptr_t)systab.tables)) {
723 char *ptr = (char *)systab.tables;
726 systab.tables = (struct efi_configuration_table *)ptr;
730 /* Relocate the runtime. See TODO above */
731 for (i = 0; i < n; i++) {
732 struct efi_mem_desc *map;
734 map = (void*)virtmap + (descriptor_size * i);
735 if (map->type == EFI_RUNTIME_SERVICES_CODE) {
736 ulong new_offset = map->virtual_start -
737 map->physical_start + gd->relocaddr;
739 efi_relocate_runtime_table(new_offset);
740 efi_runtime_relocate(new_offset, map);
747 return EFI_EXIT(ret);
751 * efi_add_runtime_mmio() - add memory-mapped IO region
753 * This function adds a memory-mapped IO region to the memory map to make it
754 * available at runtime.
756 * @mmio_ptr: pointer to a pointer to the start of the memory-mapped
758 * @len: size of the memory-mapped IO region
759 * Returns: status code
761 efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
763 struct efi_runtime_mmio_list *newmmio;
764 u64 pages = (len + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT;
765 uint64_t addr = *(uintptr_t *)mmio_ptr;
768 ret = efi_add_memory_map(addr, pages, EFI_MMAP_IO, false);
769 if (ret != EFI_SUCCESS)
770 return EFI_OUT_OF_RESOURCES;
772 newmmio = calloc(1, sizeof(*newmmio));
774 return EFI_OUT_OF_RESOURCES;
775 newmmio->ptr = mmio_ptr;
776 newmmio->paddr = *(uintptr_t *)mmio_ptr;
778 list_add_tail(&newmmio->link, &efi_runtime_mmio);
784 * In the second stage, U-Boot has disappeared. To isolate our runtime code
785 * that at this point still exists from the rest, we put it into a special
790 * This means that we can not rely on any code outside of this file in any
791 * function or variable below this line.
793 * Please keep everything fully self-contained and annotated with
794 * __efi_runtime and __efi_runtime_data markers.
798 * Relocate the EFI runtime stub to a different place. We need to call this
799 * the first time we expose the runtime interface to a user and on set virtual
804 * efi_unimplemented() - replacement function, returns EFI_UNSUPPORTED
806 * This function is used after SetVirtualAddressMap() is called as replacement
807 * for services that are not available anymore due to constraints of the U-Boot
810 * Return: EFI_UNSUPPORTED
812 static efi_status_t __efi_runtime EFIAPI efi_unimplemented(void)
814 return EFI_UNSUPPORTED;
818 * efi_update_capsule() - process information from operating system
820 * This function implements the UpdateCapsule() runtime service.
822 * See the Unified Extensible Firmware Interface (UEFI) specification for
825 * @capsule_header_array: pointer to array of virtual pointers
826 * @capsule_count: number of pointers in capsule_header_array
827 * @scatter_gather_list: pointer to arry of physical pointers
828 * Returns: status code
830 efi_status_t __efi_runtime EFIAPI efi_update_capsule(
831 struct efi_capsule_header **capsule_header_array,
832 efi_uintn_t capsule_count,
833 u64 scatter_gather_list)
835 return EFI_UNSUPPORTED;
839 * efi_query_capsule_caps() - check if capsule is supported
841 * This function implements the QueryCapsuleCapabilities() runtime service.
843 * See the Unified Extensible Firmware Interface (UEFI) specification for
846 * @capsule_header_array: pointer to array of virtual pointers
847 * @capsule_count: number of pointers in capsule_header_array
848 * @maximum_capsule_size: maximum capsule size
849 * @reset_type: type of reset needed for capsule update
850 * Returns: status code
852 efi_status_t __efi_runtime EFIAPI efi_query_capsule_caps(
853 struct efi_capsule_header **capsule_header_array,
854 efi_uintn_t capsule_count,
855 u64 *maximum_capsule_size,
858 return EFI_UNSUPPORTED;
861 struct efi_runtime_services __efi_runtime_data efi_runtime_services = {
863 .signature = EFI_RUNTIME_SERVICES_SIGNATURE,
864 .revision = EFI_SPECIFICATION_VERSION,
865 .headersize = sizeof(struct efi_runtime_services),
867 .get_time = &efi_get_time_boottime,
868 .set_time = &efi_set_time_boottime,
869 .get_wakeup_time = (void *)&efi_unimplemented,
870 .set_wakeup_time = (void *)&efi_unimplemented,
871 .set_virtual_address_map = &efi_set_virtual_address_map,
872 .convert_pointer = efi_convert_pointer,
873 .get_variable = efi_get_variable,
874 .get_next_variable_name = efi_get_next_variable_name,
875 .set_variable = efi_set_variable,
876 .get_next_high_mono_count = (void *)&efi_unimplemented,
877 .reset_system = &efi_reset_system_boottime,
878 .update_capsule = efi_update_capsule,
879 .query_capsule_caps = efi_query_capsule_caps,
880 .query_variable_info = efi_query_variable_info,