1 // SPDX-License-Identifier: GPL-2.0
3 * Common EFI (Extensible Firmware Interface) support functions
4 * Based on Extensible Firmware Interface Specification version 1.0
6 * Copyright (C) 1999 VA Linux Systems
7 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
8 * Copyright (C) 1999-2002 Hewlett-Packard Co.
9 * David Mosberger-Tang <davidm@hpl.hp.com>
10 * Stephane Eranian <eranian@hpl.hp.com>
11 * Copyright (C) 2005-2008 Intel Co.
12 * Fenghua Yu <fenghua.yu@intel.com>
13 * Bibo Mao <bibo.mao@intel.com>
14 * Chandramouli Narayanan <mouli@linux.intel.com>
15 * Huang Ying <ying.huang@intel.com>
16 * Copyright (C) 2013 SuSE Labs
17 * Borislav Petkov <bp@suse.de> - runtime services VA mapping
19 * Copied from efi_32.c to eliminate the duplicated code between EFI
20 * 32/64 support code. --ying 2007-10-26
22 * All EFI Runtime Services are not implemented yet as EFI only
23 * supports physical mode addressing on SoftSDV. This is to be fixed
24 * in a future version. --drummond 1999-07-20
26 * Implemented EFI runtime services and virtual mode calls. --davidm
28 * Goutham Rao: <goutham.rao@intel.com>
29 * Skip non-WB memory and ignore empty memory ranges.
32 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
34 #include <linux/kernel.h>
35 #include <linux/init.h>
36 #include <linux/efi.h>
37 #include <linux/efi-bgrt.h>
38 #include <linux/export.h>
39 #include <linux/memblock.h>
40 #include <linux/slab.h>
41 #include <linux/spinlock.h>
42 #include <linux/uaccess.h>
43 #include <linux/time.h>
45 #include <linux/reboot.h>
46 #include <linux/bcd.h>
48 #include <asm/setup.h>
50 #include <asm/e820/api.h>
52 #include <asm/tlbflush.h>
53 #include <asm/x86_init.h>
54 #include <asm/uv/uv.h>
56 static unsigned long efi_systab_phys __initdata;
57 static unsigned long prop_phys = EFI_INVALID_TABLE_ADDR;
58 static unsigned long uga_phys = EFI_INVALID_TABLE_ADDR;
59 static unsigned long efi_runtime, efi_nr_tables;
61 unsigned long efi_fw_vendor, efi_config_table;
63 static const efi_config_table_type_t arch_tables[] __initconst = {
64 {EFI_PROPERTIES_TABLE_GUID, &prop_phys, "PROP" },
65 {UGA_IO_PROTOCOL_GUID, &uga_phys, "UGA" },
67 {UV_SYSTEM_TABLE_GUID, &uv_systab_phys, "UVsystab" },
72 static const unsigned long * const efi_tables[] = {
87 #ifdef CONFIG_EFI_RCI2_TABLE
95 u64 efi_setup; /* efi setup_data physical address */
97 static int add_efi_memmap __initdata;
98 static int __init setup_add_efi_memmap(char *arg)
103 early_param("add_efi_memmap", setup_add_efi_memmap);
105 void __init efi_find_mirror(void)
107 efi_memory_desc_t *md;
108 u64 mirror_size = 0, total_size = 0;
110 if (!efi_enabled(EFI_MEMMAP))
113 for_each_efi_memory_desc(md) {
114 unsigned long long start = md->phys_addr;
115 unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
118 if (md->attribute & EFI_MEMORY_MORE_RELIABLE) {
119 memblock_mark_mirror(start, size);
124 pr_info("Memory: %lldM/%lldM mirrored memory\n",
125 mirror_size>>20, total_size>>20);
129 * Tell the kernel about the EFI memory map. This might include
130 * more than the max 128 entries that can fit in the passed in e820
131 * legacy (zeropage) memory map, but the kernel's e820 table can hold
135 static void __init do_add_efi_memmap(void)
137 efi_memory_desc_t *md;
139 if (!efi_enabled(EFI_MEMMAP))
142 for_each_efi_memory_desc(md) {
143 unsigned long long start = md->phys_addr;
144 unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
148 case EFI_LOADER_CODE:
149 case EFI_LOADER_DATA:
150 case EFI_BOOT_SERVICES_CODE:
151 case EFI_BOOT_SERVICES_DATA:
152 case EFI_CONVENTIONAL_MEMORY:
153 if (efi_soft_reserve_enabled()
154 && (md->attribute & EFI_MEMORY_SP))
155 e820_type = E820_TYPE_SOFT_RESERVED;
156 else if (md->attribute & EFI_MEMORY_WB)
157 e820_type = E820_TYPE_RAM;
159 e820_type = E820_TYPE_RESERVED;
161 case EFI_ACPI_RECLAIM_MEMORY:
162 e820_type = E820_TYPE_ACPI;
164 case EFI_ACPI_MEMORY_NVS:
165 e820_type = E820_TYPE_NVS;
167 case EFI_UNUSABLE_MEMORY:
168 e820_type = E820_TYPE_UNUSABLE;
170 case EFI_PERSISTENT_MEMORY:
171 e820_type = E820_TYPE_PMEM;
175 * EFI_RESERVED_TYPE EFI_RUNTIME_SERVICES_CODE
176 * EFI_RUNTIME_SERVICES_DATA EFI_MEMORY_MAPPED_IO
177 * EFI_MEMORY_MAPPED_IO_PORT_SPACE EFI_PAL_CODE
179 e820_type = E820_TYPE_RESERVED;
183 e820__range_add(start, size, e820_type);
185 e820__update_table(e820_table);
189 * Given add_efi_memmap defaults to 0 and there there is no alternative
190 * e820 mechanism for soft-reserved memory, import the full EFI memory
191 * map if soft reservations are present and enabled. Otherwise, the
192 * mechanism to disable the kernel's consideration of EFI_MEMORY_SP is
193 * the efi=nosoftreserve option.
195 static bool do_efi_soft_reserve(void)
197 efi_memory_desc_t *md;
199 if (!efi_enabled(EFI_MEMMAP))
202 if (!efi_soft_reserve_enabled())
205 for_each_efi_memory_desc(md)
206 if (md->type == EFI_CONVENTIONAL_MEMORY &&
207 (md->attribute & EFI_MEMORY_SP))
212 int __init efi_memblock_x86_reserve_range(void)
214 struct efi_info *e = &boot_params.efi_info;
215 struct efi_memory_map_data data;
219 if (efi_enabled(EFI_PARAVIRT))
222 /* Can't handle firmware tables above 4GB on i386 */
223 if (IS_ENABLED(CONFIG_X86_32) && e->efi_memmap_hi > 0) {
224 pr_err("Memory map is above 4GB, disabling EFI.\n");
227 pmap = (phys_addr_t)(e->efi_memmap | ((u64)e->efi_memmap_hi << 32));
229 data.phys_map = pmap;
230 data.size = e->efi_memmap_size;
231 data.desc_size = e->efi_memdesc_size;
232 data.desc_version = e->efi_memdesc_version;
234 rv = efi_memmap_init_early(&data);
238 if (add_efi_memmap || do_efi_soft_reserve())
241 efi_fake_memmap_early();
243 WARN(efi.memmap.desc_version != 1,
244 "Unexpected EFI_MEMORY_DESCRIPTOR version %ld",
245 efi.memmap.desc_version);
247 memblock_reserve(pmap, efi.memmap.nr_map * efi.memmap.desc_size);
248 set_bit(EFI_PRESERVE_BS_REGIONS, &efi.flags);
253 #define OVERFLOW_ADDR_SHIFT (64 - EFI_PAGE_SHIFT)
254 #define OVERFLOW_ADDR_MASK (U64_MAX << OVERFLOW_ADDR_SHIFT)
255 #define U64_HIGH_BIT (~(U64_MAX >> 1))
257 static bool __init efi_memmap_entry_valid(const efi_memory_desc_t *md, int i)
259 u64 end = (md->num_pages << EFI_PAGE_SHIFT) + md->phys_addr - 1;
263 if (md->num_pages == 0) {
265 } else if (md->num_pages > EFI_PAGES_MAX ||
266 EFI_PAGES_MAX - md->num_pages <
267 (md->phys_addr >> EFI_PAGE_SHIFT)) {
268 end_hi = (md->num_pages & OVERFLOW_ADDR_MASK)
269 >> OVERFLOW_ADDR_SHIFT;
271 if ((md->phys_addr & U64_HIGH_BIT) && !(end & U64_HIGH_BIT))
277 pr_warn_once(FW_BUG "Invalid EFI memory map entries:\n");
280 pr_warn("mem%02u: %s range=[0x%016llx-0x%llx%016llx] (invalid)\n",
281 i, efi_md_typeattr_format(buf, sizeof(buf), md),
282 md->phys_addr, end_hi, end);
284 pr_warn("mem%02u: %s range=[0x%016llx-0x%016llx] (invalid)\n",
285 i, efi_md_typeattr_format(buf, sizeof(buf), md),
291 static void __init efi_clean_memmap(void)
293 efi_memory_desc_t *out = efi.memmap.map;
294 const efi_memory_desc_t *in = out;
295 const efi_memory_desc_t *end = efi.memmap.map_end;
298 for (i = n_removal = 0; in < end; i++) {
299 if (efi_memmap_entry_valid(in, i)) {
301 memcpy(out, in, efi.memmap.desc_size);
302 out = (void *)out + efi.memmap.desc_size;
306 in = (void *)in + efi.memmap.desc_size;
310 struct efi_memory_map_data data = {
311 .phys_map = efi.memmap.phys_map,
312 .desc_version = efi.memmap.desc_version,
313 .desc_size = efi.memmap.desc_size,
314 .size = efi.memmap.desc_size * (efi.memmap.nr_map - n_removal),
318 pr_warn("Removing %d invalid memory map entries.\n", n_removal);
319 efi_memmap_install(&data);
323 void __init efi_print_memmap(void)
325 efi_memory_desc_t *md;
328 for_each_efi_memory_desc(md) {
331 pr_info("mem%02u: %s range=[0x%016llx-0x%016llx] (%lluMB)\n",
332 i++, efi_md_typeattr_format(buf, sizeof(buf), md),
334 md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1,
335 (md->num_pages >> (20 - EFI_PAGE_SHIFT)));
339 static int __init efi_systab_init(unsigned long phys)
341 int size = efi_enabled(EFI_64BIT) ? sizeof(efi_system_table_64_t)
342 : sizeof(efi_system_table_32_t);
343 const efi_table_hdr_t *hdr;
348 hdr = p = early_memremap_ro(phys, size);
350 pr_err("Couldn't map the system table!\n");
354 ret = efi_systab_check_header(hdr, 1);
356 early_memunmap(p, size);
360 if (efi_enabled(EFI_64BIT)) {
361 const efi_system_table_64_t *systab64 = p;
363 efi_runtime = systab64->runtime;
364 over4g = systab64->runtime > U32_MAX;
367 struct efi_setup_data *data;
369 data = early_memremap_ro(efi_setup, sizeof(*data));
371 early_memunmap(p, size);
375 efi_fw_vendor = (unsigned long)data->fw_vendor;
376 efi_config_table = (unsigned long)data->tables;
378 over4g |= data->fw_vendor > U32_MAX ||
379 data->tables > U32_MAX;
381 early_memunmap(data, sizeof(*data));
383 efi_fw_vendor = systab64->fw_vendor;
384 efi_config_table = systab64->tables;
386 over4g |= systab64->fw_vendor > U32_MAX ||
387 systab64->tables > U32_MAX;
389 efi_nr_tables = systab64->nr_tables;
391 const efi_system_table_32_t *systab32 = p;
393 efi_fw_vendor = systab32->fw_vendor;
394 efi_runtime = systab32->runtime;
395 efi_config_table = systab32->tables;
396 efi_nr_tables = systab32->nr_tables;
399 efi.runtime_version = hdr->revision;
401 efi_systab_report_header(hdr, efi_fw_vendor);
402 early_memunmap(p, size);
404 if (IS_ENABLED(CONFIG_X86_32) && over4g) {
405 pr_err("EFI data located above 4GB, disabling EFI.\n");
412 static int __init efi_config_init(const efi_config_table_type_t *arch_tables)
417 if (efi_nr_tables == 0)
420 if (efi_enabled(EFI_64BIT))
421 sz = sizeof(efi_config_table_64_t);
423 sz = sizeof(efi_config_table_32_t);
426 * Let's see what config tables the firmware passed to us.
428 config_tables = early_memremap(efi_config_table, efi_nr_tables * sz);
429 if (config_tables == NULL) {
430 pr_err("Could not map Configuration table!\n");
434 ret = efi_config_parse_tables(config_tables, efi_nr_tables,
437 early_memunmap(config_tables, efi_nr_tables * sz);
441 void __init efi_init(void)
443 if (IS_ENABLED(CONFIG_X86_32) &&
444 (boot_params.efi_info.efi_systab_hi ||
445 boot_params.efi_info.efi_memmap_hi)) {
446 pr_info("Table located above 4GB, disabling EFI.\n");
450 efi_systab_phys = boot_params.efi_info.efi_systab |
451 ((__u64)boot_params.efi_info.efi_systab_hi << 32);
453 if (efi_systab_init(efi_systab_phys))
456 if (efi_reuse_config(efi_config_table, efi_nr_tables))
459 if (efi_config_init(arch_tables))
463 * Note: We currently don't support runtime services on an EFI
464 * that doesn't match the kernel 32/64-bit mode.
467 if (!efi_runtime_supported())
468 pr_info("No EFI runtime due to 32/64-bit mismatch with kernel\n");
470 if (!efi_runtime_supported() || efi_runtime_disabled()) {
475 /* Parse the EFI Properties table if it exists */
476 if (prop_phys != EFI_INVALID_TABLE_ADDR) {
477 efi_properties_table_t *tbl;
479 tbl = early_memremap_ro(prop_phys, sizeof(*tbl));
481 pr_err("Could not map Properties table!\n");
483 if (tbl->memory_protection_attribute &
484 EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA)
485 set_bit(EFI_NX_PE_DATA, &efi.flags);
487 early_memunmap(tbl, sizeof(*tbl));
491 set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
494 if (efi_enabled(EFI_DBG))
498 /* Merge contiguous regions of the same type and attribute */
499 static void __init efi_merge_regions(void)
501 efi_memory_desc_t *md, *prev_md = NULL;
503 for_each_efi_memory_desc(md) {
511 if (prev_md->type != md->type ||
512 prev_md->attribute != md->attribute) {
517 prev_size = prev_md->num_pages << EFI_PAGE_SHIFT;
519 if (md->phys_addr == (prev_md->phys_addr + prev_size)) {
520 prev_md->num_pages += md->num_pages;
521 md->type = EFI_RESERVED_TYPE;
529 static void *realloc_pages(void *old_memmap, int old_shift)
533 ret = (void *)__get_free_pages(GFP_KERNEL, old_shift + 1);
538 * A first-time allocation doesn't have anything to copy.
543 memcpy(ret, old_memmap, PAGE_SIZE << old_shift);
546 free_pages((unsigned long)old_memmap, old_shift);
551 * Iterate the EFI memory map in reverse order because the regions
552 * will be mapped top-down. The end result is the same as if we had
553 * mapped things forward, but doesn't require us to change the
554 * existing implementation of efi_map_region().
556 static inline void *efi_map_next_entry_reverse(void *entry)
560 return efi.memmap.map_end - efi.memmap.desc_size;
562 entry -= efi.memmap.desc_size;
563 if (entry < efi.memmap.map)
570 * efi_map_next_entry - Return the next EFI memory map descriptor
571 * @entry: Previous EFI memory map descriptor
573 * This is a helper function to iterate over the EFI memory map, which
574 * we do in different orders depending on the current configuration.
576 * To begin traversing the memory map @entry must be %NULL.
578 * Returns %NULL when we reach the end of the memory map.
580 static void *efi_map_next_entry(void *entry)
582 if (efi_enabled(EFI_64BIT)) {
584 * Starting in UEFI v2.5 the EFI_PROPERTIES_TABLE
585 * config table feature requires us to map all entries
586 * in the same order as they appear in the EFI memory
587 * map. That is to say, entry N must have a lower
588 * virtual address than entry N+1. This is because the
589 * firmware toolchain leaves relative references in
590 * the code/data sections, which are split and become
591 * separate EFI memory regions. Mapping things
592 * out-of-order leads to the firmware accessing
593 * unmapped addresses.
595 * Since we need to map things this way whether or not
596 * the kernel actually makes use of
597 * EFI_PROPERTIES_TABLE, let's just switch to this
598 * scheme by default for 64-bit.
600 return efi_map_next_entry_reverse(entry);
605 return efi.memmap.map;
607 entry += efi.memmap.desc_size;
608 if (entry >= efi.memmap.map_end)
614 static bool should_map_region(efi_memory_desc_t *md)
617 * Runtime regions always require runtime mappings (obviously).
619 if (md->attribute & EFI_MEMORY_RUNTIME)
623 * 32-bit EFI doesn't suffer from the bug that requires us to
624 * reserve boot services regions, and mixed mode support
625 * doesn't exist for 32-bit kernels.
627 if (IS_ENABLED(CONFIG_X86_32))
631 * EFI specific purpose memory may be reserved by default
632 * depending on kernel config and boot options.
634 if (md->type == EFI_CONVENTIONAL_MEMORY &&
635 efi_soft_reserve_enabled() &&
636 (md->attribute & EFI_MEMORY_SP))
640 * Map all of RAM so that we can access arguments in the 1:1
641 * mapping when making EFI runtime calls.
643 if (efi_is_mixed()) {
644 if (md->type == EFI_CONVENTIONAL_MEMORY ||
645 md->type == EFI_LOADER_DATA ||
646 md->type == EFI_LOADER_CODE)
651 * Map boot services regions as a workaround for buggy
652 * firmware that accesses them even when they shouldn't.
654 * See efi_{reserve,free}_boot_services().
656 if (md->type == EFI_BOOT_SERVICES_CODE ||
657 md->type == EFI_BOOT_SERVICES_DATA)
664 * Map the efi memory ranges of the runtime services and update new_mmap with
667 static void * __init efi_map_regions(int *count, int *pg_shift)
669 void *p, *new_memmap = NULL;
670 unsigned long left = 0;
671 unsigned long desc_size;
672 efi_memory_desc_t *md;
674 desc_size = efi.memmap.desc_size;
677 while ((p = efi_map_next_entry(p))) {
680 if (!should_map_region(md))
685 if (left < desc_size) {
686 new_memmap = realloc_pages(new_memmap, *pg_shift);
690 left += PAGE_SIZE << *pg_shift;
694 memcpy(new_memmap + (*count * desc_size), md, desc_size);
703 static void __init kexec_enter_virtual_mode(void)
705 #ifdef CONFIG_KEXEC_CORE
706 efi_memory_desc_t *md;
707 unsigned int num_pages;
710 * We don't do virtual mode, since we don't do runtime services, on
713 if (efi_is_mixed()) {
715 clear_bit(EFI_RUNTIME_SERVICES, &efi.flags);
719 if (efi_alloc_page_tables()) {
720 pr_err("Failed to allocate EFI page tables\n");
721 clear_bit(EFI_RUNTIME_SERVICES, &efi.flags);
726 * Map efi regions which were passed via setup_data. The virt_addr is a
727 * fixed addr which was used in first kernel of a kexec boot.
729 for_each_efi_memory_desc(md)
730 efi_map_region_fixed(md); /* FIXME: add error handling */
733 * Unregister the early EFI memmap from efi_init() and install
734 * the new EFI memory map.
738 if (efi_memmap_init_late(efi.memmap.phys_map,
739 efi.memmap.desc_size * efi.memmap.nr_map)) {
740 pr_err("Failed to remap late EFI memory map\n");
741 clear_bit(EFI_RUNTIME_SERVICES, &efi.flags);
745 num_pages = ALIGN(efi.memmap.nr_map * efi.memmap.desc_size, PAGE_SIZE);
746 num_pages >>= PAGE_SHIFT;
748 if (efi_setup_page_tables(efi.memmap.phys_map, num_pages)) {
749 clear_bit(EFI_RUNTIME_SERVICES, &efi.flags);
753 efi_sync_low_kernel_mappings();
754 efi_native_runtime_setup();
759 * This function will switch the EFI runtime services to virtual mode.
760 * Essentially, we look through the EFI memmap and map every region that
761 * has the runtime attribute bit set in its memory descriptor into the
762 * efi_pgd page table.
764 * The new method does a pagetable switch in a preemption-safe manner
765 * so that we're in a different address space when calling a runtime
766 * function. For function arguments passing we do copy the PUDs of the
767 * kernel page table into efi_pgd prior to each call.
769 * Specially for kexec boot, efi runtime maps in previous kernel should
770 * be passed in via setup_data. In that case runtime ranges will be mapped
771 * to the same virtual addresses as the first kernel, see
772 * kexec_enter_virtual_mode().
774 static void __init __efi_enter_virtual_mode(void)
776 int count = 0, pg_shift = 0;
777 void *new_memmap = NULL;
781 if (efi_alloc_page_tables()) {
782 pr_err("Failed to allocate EFI page tables\n");
787 new_memmap = efi_map_regions(&count, &pg_shift);
789 pr_err("Error reallocating memory, EFI runtime non-functional!\n");
793 pa = __pa(new_memmap);
796 * Unregister the early EFI memmap from efi_init() and install
797 * the new EFI memory map that we are about to pass to the
798 * firmware via SetVirtualAddressMap().
802 if (efi_memmap_init_late(pa, efi.memmap.desc_size * count)) {
803 pr_err("Failed to remap late EFI memory map\n");
807 if (efi_enabled(EFI_DBG)) {
808 pr_info("EFI runtime memory map:\n");
812 if (efi_setup_page_tables(pa, 1 << pg_shift))
815 efi_sync_low_kernel_mappings();
817 status = efi_set_virtual_address_map(efi.memmap.desc_size * count,
818 efi.memmap.desc_size,
819 efi.memmap.desc_version,
820 (efi_memory_desc_t *)pa,
822 if (status != EFI_SUCCESS) {
823 pr_err("Unable to switch EFI into virtual mode (status=%lx)!\n",
828 efi_check_for_embedded_firmwares();
829 efi_free_boot_services();
832 efi_native_runtime_setup();
834 efi_thunk_runtime_setup();
837 * Apply more restrictive page table mapping attributes now that
838 * SVAM() has been called and the firmware has performed all
839 * necessary relocation fixups for the new virtual addresses.
841 efi_runtime_update_mappings();
843 /* clean DUMMY object */
844 efi_delete_dummy_variable();
848 clear_bit(EFI_RUNTIME_SERVICES, &efi.flags);
851 void __init efi_enter_virtual_mode(void)
853 if (efi_enabled(EFI_PARAVIRT))
856 efi.runtime = (efi_runtime_services_t *)efi_runtime;
859 kexec_enter_virtual_mode();
861 __efi_enter_virtual_mode();
863 efi_dump_pagetable();
866 bool efi_is_table_address(unsigned long phys_addr)
870 if (phys_addr == EFI_INVALID_TABLE_ADDR)
873 for (i = 0; i < ARRAY_SIZE(efi_tables); i++)
874 if (*(efi_tables[i]) == phys_addr)
880 char *efi_systab_show_arch(char *str)
882 if (uga_phys != EFI_INVALID_TABLE_ADDR)
883 str += sprintf(str, "UGA=0x%lx\n", uga_phys);
887 #define EFI_FIELD(var) efi_ ## var
889 #define EFI_ATTR_SHOW(name) \
890 static ssize_t name##_show(struct kobject *kobj, \
891 struct kobj_attribute *attr, char *buf) \
893 return sprintf(buf, "0x%lx\n", EFI_FIELD(name)); \
896 EFI_ATTR_SHOW(fw_vendor);
897 EFI_ATTR_SHOW(runtime);
898 EFI_ATTR_SHOW(config_table);
900 struct kobj_attribute efi_attr_fw_vendor = __ATTR_RO(fw_vendor);
901 struct kobj_attribute efi_attr_runtime = __ATTR_RO(runtime);
902 struct kobj_attribute efi_attr_config_table = __ATTR_RO(config_table);
904 umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n)
906 if (attr == &efi_attr_fw_vendor.attr) {
907 if (efi_enabled(EFI_PARAVIRT) ||
908 efi_fw_vendor == EFI_INVALID_TABLE_ADDR)
910 } else if (attr == &efi_attr_runtime.attr) {
911 if (efi_runtime == EFI_INVALID_TABLE_ADDR)
913 } else if (attr == &efi_attr_config_table.attr) {
914 if (efi_config_table == EFI_INVALID_TABLE_ADDR)