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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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/* * Extensible Firmware Interface * Based on 'Extensible Firmware Interface Specification' version 0.9, April 30, 1999 * * Copyright (C) 1999 VA Linux Systems * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co. * David Mosberger-Tang <davidm@hpl.hp.com> * Stephane Eranian <eranian@hpl.hp.com> */#include <linux/init.h>#include <linux/string.h>#include <linux/time.h>#include <linux/types.h>#include <linux/proc_fs.h>#include <linux/rtc.h>#include <linux/ioport.h>#include <linux/pfn.h>#include <linux/pstore.h>#include <linux/range.h>#include <linux/reboot.h>#include <linux/uuid.h>
#include <asm/page.h>
struct screen_info;
#define EFI_SUCCESS 0#define EFI_LOAD_ERROR ( 1 | (1UL << (BITS_PER_LONG-1)))#define EFI_INVALID_PARAMETER ( 2 | (1UL << (BITS_PER_LONG-1)))#define EFI_UNSUPPORTED ( 3 | (1UL << (BITS_PER_LONG-1)))#define EFI_BAD_BUFFER_SIZE ( 4 | (1UL << (BITS_PER_LONG-1)))#define EFI_BUFFER_TOO_SMALL ( 5 | (1UL << (BITS_PER_LONG-1)))#define EFI_NOT_READY ( 6 | (1UL << (BITS_PER_LONG-1)))#define EFI_DEVICE_ERROR ( 7 | (1UL << (BITS_PER_LONG-1)))#define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1)))#define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1)))#define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1)))#define EFI_ACCESS_DENIED (15 | (1UL << (BITS_PER_LONG-1)))#define EFI_TIMEOUT (18 | (1UL << (BITS_PER_LONG-1)))#define EFI_ABORTED (21 | (1UL << (BITS_PER_LONG-1)))#define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1)))
typedef unsigned long efi_status_t;typedef u8 efi_bool_t;typedef u16 efi_char16_t; /* UNICODE character */typedef u64 efi_physical_addr_t;typedef void *efi_handle_t;
#if defined(CONFIG_X86_64)#define __efiapi __attribute__((ms_abi))#elif defined(CONFIG_X86_32)#define __efiapi __attribute__((regparm(0)))#else#define __efiapi#endif
/* * The UEFI spec and EDK2 reference implementation both define EFI_GUID as * struct { u32 a; u16 b; u16 c; u8 d[8]; }; and so the implied alignment * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM), * this means that firmware services invoked by the kernel may assume that * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that * do not tolerate misalignment. So let's set the minimum alignment to 32 bits. * * Note that the UEFI spec as well as some comments in the EDK2 code base * suggest that EFI_GUID should be 64-bit aligned, but this appears to be * a mistake, given that no code seems to exist that actually enforces that * or relies on it. */typedef guid_t efi_guid_t __aligned(__alignof__(u32));
#define EFI_GUID(a, b, c, d...) ((efi_guid_t){ { \ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ (b) & 0xff, ((b) >> 8) & 0xff, \ (c) & 0xff, ((c) >> 8) & 0xff, d } })
/* * Generic EFI table header */typedef struct { u64 signature; u32 revision; u32 headersize; u32 crc32; u32 reserved;} efi_table_hdr_t;
/* * Memory map descriptor: */
/* Memory types: */#define EFI_RESERVED_TYPE 0#define EFI_LOADER_CODE 1#define EFI_LOADER_DATA 2#define EFI_BOOT_SERVICES_CODE 3#define EFI_BOOT_SERVICES_DATA 4#define EFI_RUNTIME_SERVICES_CODE 5#define EFI_RUNTIME_SERVICES_DATA 6#define EFI_CONVENTIONAL_MEMORY 7#define EFI_UNUSABLE_MEMORY 8#define EFI_ACPI_RECLAIM_MEMORY 9#define EFI_ACPI_MEMORY_NVS 10#define EFI_MEMORY_MAPPED_IO 11#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12#define EFI_PAL_CODE 13#define EFI_PERSISTENT_MEMORY 14#define EFI_UNACCEPTED_MEMORY 15#define EFI_MAX_MEMORY_TYPE 16
/* Attribute values: */#define EFI_MEMORY_UC BIT_ULL(0) /* uncached */#define EFI_MEMORY_WC BIT_ULL(1) /* write-coalescing */#define EFI_MEMORY_WT BIT_ULL(2) /* write-through */#define EFI_MEMORY_WB BIT_ULL(3) /* write-back */#define EFI_MEMORY_UCE BIT_ULL(4) /* uncached, exported */#define EFI_MEMORY_WP BIT_ULL(12) /* write-protect */#define EFI_MEMORY_RP BIT_ULL(13) /* read-protect */#define EFI_MEMORY_XP BIT_ULL(14) /* execute-protect */#define EFI_MEMORY_NV BIT_ULL(15) /* non-volatile */#define EFI_MEMORY_MORE_RELIABLE BIT_ULL(16) /* higher reliability */#define EFI_MEMORY_RO BIT_ULL(17) /* read-only */#define EFI_MEMORY_SP BIT_ULL(18) /* soft reserved */#define EFI_MEMORY_CPU_CRYPTO BIT_ULL(19) /* supports encryption */#define EFI_MEMORY_HOT_PLUGGABLE BIT_ULL(20) /* supports unplugging at runtime */#define EFI_MEMORY_RUNTIME BIT_ULL(63) /* range requires runtime mapping */
#define EFI_MEMORY_DESCRIPTOR_VERSION 1
#define EFI_PAGE_SHIFT 12#define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)#define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT)
typedef struct { u32 type; u32 pad; u64 phys_addr; u64 virt_addr; u64 num_pages; u64 attribute;} efi_memory_desc_t;
typedef struct { efi_guid_t guid; u32 headersize; u32 flags; u32 imagesize;} efi_capsule_header_t;
/* EFI_FIRMWARE_MANAGEMENT_CAPSULE_HEADER */struct efi_manage_capsule_header { u32 ver; u16 emb_drv_cnt; u16 payload_cnt; /* * Variable-size array of the size given by the sum of * emb_drv_cnt and payload_cnt. */ u64 offset_list[];} __packed;
/* EFI_FIRMWARE_MANAGEMENT_CAPSULE_IMAGE_HEADER */struct efi_manage_capsule_image_header { u32 ver; efi_guid_t image_type_id; u8 image_index; u8 reserved_bytes[3]; u32 image_size; u32 vendor_code_size; /* hw_ins was introduced in version 2 */ u64 hw_ins; /* capsule_support was introduced in version 3 */ u64 capsule_support;} __packed;
/* WIN_CERTIFICATE */struct win_cert { u32 len; u16 rev; u16 cert_type;};
/* WIN_CERTIFICATE_UEFI_GUID */struct win_cert_uefi_guid { struct win_cert hdr; efi_guid_t cert_type; u8 cert_data[];};
/* EFI_FIRMWARE_IMAGE_AUTHENTICATION */struct efi_image_auth { u64 mon_count; struct win_cert_uefi_guid auth_info;};
/* * EFI capsule flags */#define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000#define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000#define EFI_CAPSULE_INITIATE_RESET 0x00040000
struct capsule_info { efi_capsule_header_t header; efi_capsule_header_t *capsule; int reset_type; long index; size_t count; size_t total_size; struct page **pages; phys_addr_t *phys; size_t page_bytes_remain;};
int efi_capsule_setup_info(struct capsule_info *cap_info, void *kbuff, size_t hdr_bytes);int __efi_capsule_setup_info(struct capsule_info *cap_info);
/* * Types and defines for Time Services */#define EFI_TIME_ADJUST_DAYLIGHT 0x1#define EFI_TIME_IN_DAYLIGHT 0x2#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
typedef struct { u16 year; u8 month; u8 day; u8 hour; u8 minute; u8 second; u8 pad1; u32 nanosecond; s16 timezone; u8 daylight; u8 pad2;} efi_time_t;
typedef struct { u32 resolution; u32 accuracy; u8 sets_to_zero;} efi_time_cap_t;
typedef union efi_boot_services efi_boot_services_t;
/* * Types and defines for EFI ResetSystem */#define EFI_RESET_COLD 0#define EFI_RESET_WARM 1#define EFI_RESET_SHUTDOWN 2
/* * EFI Runtime Services table */#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)#define EFI_RUNTIME_SERVICES_REVISION 0x00010000
typedef struct { efi_table_hdr_t hdr; u32 get_time; u32 set_time; u32 get_wakeup_time; u32 set_wakeup_time; u32 set_virtual_address_map; u32 convert_pointer; u32 get_variable; u32 get_next_variable; u32 set_variable; u32 get_next_high_mono_count; u32 reset_system; u32 update_capsule; u32 query_capsule_caps; u32 query_variable_info;} efi_runtime_services_32_t;
typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);typedef efi_status_t efi_set_time_t (efi_time_t *tm);typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending, efi_time_t *tm);typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, unsigned long *data_size, void *data);typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name, efi_guid_t *vendor);typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 attr, unsigned long data_size, void *data);typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);typedef void efi_reset_system_t (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data);typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size, unsigned long descriptor_size, u32 descriptor_version, efi_memory_desc_t *virtual_map);typedef efi_status_t efi_query_variable_info_t(u32 attr, u64 *storage_space, u64 *remaining_space, u64 *max_variable_size);typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules, unsigned long count, unsigned long sg_list);typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules, unsigned long count, u64 *max_size, int *reset_type);typedef efi_status_t efi_query_variable_store_t(u32 attributes, unsigned long size, bool nonblocking);
typedef union { struct { efi_table_hdr_t hdr; efi_get_time_t __efiapi *get_time; efi_set_time_t __efiapi *set_time; efi_get_wakeup_time_t __efiapi *get_wakeup_time; efi_set_wakeup_time_t __efiapi *set_wakeup_time; efi_set_virtual_address_map_t __efiapi *set_virtual_address_map; void *convert_pointer; efi_get_variable_t __efiapi *get_variable; efi_get_next_variable_t __efiapi *get_next_variable; efi_set_variable_t __efiapi *set_variable; efi_get_next_high_mono_count_t __efiapi *get_next_high_mono_count; efi_reset_system_t __efiapi *reset_system; efi_update_capsule_t __efiapi *update_capsule; efi_query_capsule_caps_t __efiapi *query_capsule_caps; efi_query_variable_info_t __efiapi *query_variable_info; }; efi_runtime_services_32_t mixed_mode;} efi_runtime_services_t;
void efi_native_runtime_setup(void);
/* * EFI Configuration Table and GUID definitions * * These are all defined in a single line to make them easier to * grep for and to see them at a glance - while still having a * similar structure to the definitions in the spec. * * Here's how they are structured: * * GUID: 12345678-1234-1234-1234-123456789012 * Spec: * #define EFI_SOME_PROTOCOL_GUID \ * {0x12345678,0x1234,0x1234,\ * {0x12,0x34,0x12,0x34,0x56,0x78,0x90,0x12}} * Here: * #define SOME_PROTOCOL_GUID EFI_GUID(0x12345678, 0x1234, 0x1234, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x90, 0x12) * ^ tabs ^extra space * * Note that the 'extra space' separates the values at the same place * where the UEFI SPEC breaks the line. */#define NULL_GUID EFI_GUID(0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00)#define ACPI_TABLE_GUID EFI_GUID(0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)#define ACPI_20_TABLE_GUID EFI_GUID(0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x00, 0x80, 0xc7, 0x3c, 0x88, 0x81)#define SMBIOS_TABLE_GUID EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)#define SMBIOS3_TABLE_GUID EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)#define EFI_GLOBAL_VARIABLE_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c)#define UV_SYSTEM_TABLE_GUID EFI_GUID(0x3b13a7d4, 0x633e, 0x11dd, 0x93, 0xec, 0xda, 0x25, 0x56, 0xd8, 0x95, 0x93)#define LINUX_EFI_CRASH_GUID EFI_GUID(0xcfc8fc79, 0xbe2e, 0x4ddc, 0x97, 0xf0, 0x9f, 0x98, 0xbf, 0xe2, 0x98, 0xa0)#define LOADED_IMAGE_PROTOCOL_GUID EFI_GUID(0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)#define LOADED_IMAGE_DEVICE_PATH_PROTOCOL_GUID EFI_GUID(0xbc62157e, 0x3e33, 0x4fec, 0x99, 0x20, 0x2d, 0x3b, 0x36, 0xd7, 0x50, 0xdf)#define EFI_DEVICE_PATH_PROTOCOL_GUID EFI_GUID(0x09576e91, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)#define EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID EFI_GUID(0x8b843e20, 0x8132, 0x4852, 0x90, 0xcc, 0x55, 0x1a, 0x4e, 0x4a, 0x7f, 0x1c)#define EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL_GUID EFI_GUID(0x05c99a21, 0xc70f, 0x4ad2, 0x8a, 0x5f, 0x35, 0xdf, 0x33, 0x43, 0xf5, 0x1e)#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a)#define EFI_EDID_DISCOVERED_PROTOCOL_GUID EFI_GUID(0x1c0c34f6, 0xd380, 0x41fa, 0xa0, 0x49, 0x8a, 0xd0, 0x6c, 0x1a, 0x66, 0xaa)#define EFI_EDID_ACTIVE_PROTOCOL_GUID EFI_GUID(0xbd8c1056, 0x9f36, 0x44ec, 0x92, 0xa8, 0xa6, 0x33, 0x7f, 0x81, 0x79, 0x86)#define EFI_PCI_IO_PROTOCOL_GUID EFI_GUID(0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x02, 0x9a)#define EFI_FILE_INFO_ID EFI_GUID(0x09576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)#define EFI_SYSTEM_RESOURCE_TABLE_GUID EFI_GUID(0xb122a263, 0x3661, 0x4f68, 0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80)#define EFI_FILE_SYSTEM_GUID EFI_GUID(0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)#define DEVICE_TREE_GUID EFI_GUID(0xb1b621d5, 0xf19c, 0x41a5, 0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0)#define EFI_RNG_PROTOCOL_GUID EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)#define EFI_RNG_ALGORITHM_RAW EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61)#define EFI_MEMORY_ATTRIBUTES_TABLE_GUID EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)#define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)#define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)#define APPLE_SET_OS_PROTOCOL_GUID EFI_GUID(0xc5c5da95, 0x7d5c, 0x45e6, 0xb2, 0xf1, 0x3f, 0xd5, 0x2b, 0xb1, 0x00, 0x77)#define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f)#define EFI_TCG2_FINAL_EVENTS_TABLE_GUID EFI_GUID(0x1e2ed096, 0x30e2, 0x4254, 0xbd, 0x89, 0x86, 0x3b, 0xbe, 0xf8, 0x23, 0x25)#define EFI_LOAD_FILE_PROTOCOL_GUID EFI_GUID(0x56ec3091, 0x954c, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)#define EFI_LOAD_FILE2_PROTOCOL_GUID EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e, 0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d)#define EFI_RT_PROPERTIES_TABLE_GUID EFI_GUID(0xeb66918a, 0x7eef, 0x402a, 0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9)#define EFI_DXE_SERVICES_TABLE_GUID EFI_GUID(0x05ad34ba, 0x6f02, 0x4214, 0x95, 0x2e, 0x4d, 0xa0, 0x39, 0x8e, 0x2b, 0xb9)#define EFI_SMBIOS_PROTOCOL_GUID EFI_GUID(0x03583ff6, 0xcb36, 0x4940, 0x94, 0x7e, 0xb9, 0xb3, 0x9f, 0x4a, 0xfa, 0xf7)#define EFI_MEMORY_ATTRIBUTE_PROTOCOL_GUID EFI_GUID(0xf4560cf6, 0x40ec, 0x4b4a, 0xa1, 0x92, 0xbf, 0x1d, 0x57, 0xd0, 0xb1, 0x89)
#define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)#define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
#define EFI_CERT_SHA256_GUID EFI_GUID(0xc1c41626, 0x504c, 0x4092, 0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28)#define EFI_CERT_X509_GUID EFI_GUID(0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72)#define EFI_CERT_X509_SHA256_GUID EFI_GUID(0x3bd2a492, 0x96c0, 0x4079, 0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed)#define EFI_CC_BLOB_GUID EFI_GUID(0x067b1f5f, 0xcf26, 0x44c5, 0x85, 0x54, 0x93, 0xd7, 0x77, 0x91, 0x2d, 0x42)#define EFI_CC_MEASUREMENT_PROTOCOL_GUID EFI_GUID(0x96751a3d, 0x72f4, 0x41a6, 0xa7, 0x94, 0xed, 0x5d, 0x0e, 0x67, 0xae, 0x6b)#define EFI_CC_FINAL_EVENTS_TABLE_GUID EFI_GUID(0xdd4a4648, 0x2de7, 0x4665, 0x96, 0x4d, 0x21, 0xd9, 0xef, 0x5f, 0xb4, 0x46)
/* * This GUIDs are used to pass to the kernel proper the primary * display that has been populated by the stub based on the GOP * instance associated with ConOut. */#define LINUX_EFI_PRIMARY_DISPLAY_TABLE_GUID EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, 0xb9, 0x0e, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
#define LINUX_EFI_ARM_CPU_STATE_TABLE_GUID EFI_GUID(0xef79e4aa, 0x3c3d, 0x4989, 0xb9, 0x02, 0x07, 0xa9, 0x43, 0xe5, 0x50, 0xd2)#define LINUX_EFI_LOADER_ENTRY_GUID EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)#define LINUX_EFI_RANDOM_SEED_TABLE_GUID EFI_GUID(0x1ce1e5bc, 0x7ceb, 0x42f2, 0x81, 0xe5, 0x8a, 0xad, 0xf1, 0x80, 0xf5, 0x7b)#define LINUX_EFI_TPM_EVENT_LOG_GUID EFI_GUID(0xb7799cb0, 0xeca2, 0x4943, 0x96, 0x67, 0x1f, 0xae, 0x07, 0xb7, 0x47, 0xfa)#define LINUX_EFI_MEMRESERVE_TABLE_GUID EFI_GUID(0x888eb0c6, 0x8ede, 0x4ff5, 0xa8, 0xf0, 0x9a, 0xee, 0x5c, 0xb9, 0x77, 0xc2)#define LINUX_EFI_INITRD_MEDIA_GUID EFI_GUID(0x5568e427, 0x68fc, 0x4f3d, 0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68)#define LINUX_EFI_MOK_VARIABLE_TABLE_GUID EFI_GUID(0xc451ed2b, 0x9694, 0x45d3, 0xba, 0xba, 0xed, 0x9f, 0x89, 0x88, 0xa3, 0x89)#define LINUX_EFI_COCO_SECRET_AREA_GUID EFI_GUID(0xadf956ad, 0xe98c, 0x484c, 0xae, 0x11, 0xb5, 0x1c, 0x7d, 0x33, 0x64, 0x47)#define LINUX_EFI_BOOT_MEMMAP_GUID EFI_GUID(0x800f683f, 0xd08b, 0x423a, 0xa2, 0x93, 0x96, 0x5c, 0x3c, 0x6f, 0xe2, 0xb4)#define LINUX_EFI_UNACCEPTED_MEM_TABLE_GUID EFI_GUID(0xd5d1de3c, 0x105c, 0x44f9, 0x9e, 0xa9, 0xbc, 0xef, 0x98, 0x12, 0x00, 0x31)
#define RISCV_EFI_BOOT_PROTOCOL_GUID EFI_GUID(0xccd15fec, 0x6f73, 0x4eec, 0x83, 0x95, 0x3e, 0x69, 0xe4, 0xb9, 0x40, 0xbf)
/* * This GUID may be installed onto the kernel image's handle as a NULL protocol * to signal to the stub that the placement of the image should be respected, * and moving the image in physical memory is undesirable. To ensure * compatibility with 64k pages kernels with virtually mapped stacks, and to * avoid defeating physical randomization, this protocol should only be * installed if the image was placed at a randomized 128k aligned address in * memory. */#define LINUX_EFI_LOADED_IMAGE_FIXED_GUID EFI_GUID(0xf5a37b6d, 0x3344, 0x42a5, 0xb6, 0xbb, 0x97, 0x86, 0x48, 0xc1, 0x89, 0x0a)
/* OEM GUIDs */#define DELLEMC_EFI_RCI2_TABLE_GUID EFI_GUID(0x2d9f28a2, 0xa886, 0x456a, 0x97, 0xa8, 0xf1, 0x1e, 0xf2, 0x4f, 0xf4, 0x55)#define AMD_SEV_MEM_ENCRYPT_GUID EFI_GUID(0x0cf29b71, 0x9e51, 0x433a, 0xa3, 0xb7, 0x81, 0xf3, 0xab, 0x16, 0xb8, 0x75)
/* OVMF protocol GUIDs */#define OVMF_SEV_MEMORY_ACCEPTANCE_PROTOCOL_GUID EFI_GUID(0xc5a010fe, 0x38a7, 0x4531, 0x8a, 0x4a, 0x05, 0x00, 0xd2, 0xfd, 0x16, 0x49)#define OVMF_MEMORY_LOG_TABLE_GUID EFI_GUID(0x95305139, 0xb20f, 0x4723, 0x84, 0x25, 0x62, 0x7c, 0x88, 0x8f, 0xf1, 0x21)
typedef struct { efi_guid_t guid; u64 table;} efi_config_table_64_t;
typedef struct { efi_guid_t guid; u32 table;} efi_config_table_32_t;
typedef union { struct { efi_guid_t guid; void *table; }; efi_config_table_32_t mixed_mode;} efi_config_table_t;
typedef struct { efi_guid_t guid; unsigned long *ptr; const char name[16];} efi_config_table_type_t;
#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)#define EFI_DXE_SERVICES_TABLE_SIGNATURE ((u64)0x565245535f455844ULL)
#define EFI_2_30_SYSTEM_TABLE_REVISION ((2 << 16) | (30))#define EFI_2_20_SYSTEM_TABLE_REVISION ((2 << 16) | (20))#define EFI_2_10_SYSTEM_TABLE_REVISION ((2 << 16) | (10))#define EFI_2_00_SYSTEM_TABLE_REVISION ((2 << 16) | (00))#define EFI_1_10_SYSTEM_TABLE_REVISION ((1 << 16) | (10))#define EFI_1_02_SYSTEM_TABLE_REVISION ((1 << 16) | (02))
typedef struct { efi_table_hdr_t hdr; u64 fw_vendor; /* physical addr of CHAR16 vendor string */ u32 fw_revision; u32 __pad1; u64 con_in_handle; u64 con_in; u64 con_out_handle; u64 con_out; u64 stderr_handle; u64 stderr; u64 runtime; u64 boottime; u32 nr_tables; u32 __pad2; u64 tables;} efi_system_table_64_t;
typedef struct { efi_table_hdr_t hdr; u32 fw_vendor; /* physical addr of CHAR16 vendor string */ u32 fw_revision; u32 con_in_handle; u32 con_in; u32 con_out_handle; u32 con_out; u32 stderr_handle; u32 stderr; u32 runtime; u32 boottime; u32 nr_tables; u32 tables;} efi_system_table_32_t;
typedef union efi_simple_text_input_protocol efi_simple_text_input_protocol_t;typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t;
typedef union { struct { efi_table_hdr_t hdr; unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */ u32 fw_revision; unsigned long con_in_handle; efi_simple_text_input_protocol_t *con_in; unsigned long con_out_handle; efi_simple_text_output_protocol_t *con_out; unsigned long stderr_handle; unsigned long stderr; efi_runtime_services_t *runtime; efi_boot_services_t *boottime; unsigned long nr_tables; unsigned long tables; }; efi_system_table_32_t mixed_mode;} efi_system_table_t;
struct efi_boot_memmap { unsigned long map_size; unsigned long desc_size; u32 desc_ver; unsigned long map_key; unsigned long buff_size; efi_memory_desc_t map[];};
struct efi_unaccepted_memory { u32 version; u32 unit_size; u64 phys_base; u64 size; unsigned long bitmap[];};
/* * Architecture independent structure for describing a memory map for the * benefit of efi_memmap_init_early(), and for passing context between * efi_memmap_alloc() and efi_memmap_install(). */struct efi_memory_map_data { phys_addr_t phys_map; unsigned long size; unsigned long desc_version; unsigned long desc_size; unsigned long flags;};
struct efi_memory_map { phys_addr_t phys_map; void *map; void *map_end; int nr_map; unsigned long desc_version; unsigned long desc_size;#define EFI_MEMMAP_LATE (1UL << 0)#define EFI_MEMMAP_MEMBLOCK (1UL << 1)#define EFI_MEMMAP_SLAB (1UL << 2) unsigned long flags;};
struct efi_mem_range { struct range range; u64 attribute;};
typedef struct { u16 version; u16 length; u32 runtime_services_supported;} efi_rt_properties_table_t;
#define EFI_RT_PROPERTIES_TABLE_VERSION 0x1
#define EFI_INVALID_TABLE_ADDR (~0UL)
// BIT0 implies that Runtime code includes the forward control flow guard// instruction, such as X86 CET-IBT or ARM BTI.#define EFI_MEMORY_ATTRIBUTES_FLAGS_RT_FORWARD_CONTROL_FLOW_GUARD 0x1
typedef struct { u32 version; u32 num_entries; u32 desc_size; u32 flags; /* * There are @num_entries following, each of size @desc_size bytes, * including an efi_memory_desc_t header. See efi_memdesc_ptr(). */ efi_memory_desc_t entry[];} efi_memory_attributes_table_t;
typedef struct { efi_guid_t signature_owner; u8 signature_data[];} efi_signature_data_t;
typedef struct { efi_guid_t signature_type; u32 signature_list_size; u32 signature_header_size; u32 signature_size; u8 signature_header[]; /* efi_signature_data_t signatures[][] */} efi_signature_list_t;
typedef u8 efi_sha256_hash_t[32];
typedef struct { efi_sha256_hash_t to_be_signed_hash; efi_time_t time_of_revocation;} efi_cert_x509_sha256_t;
extern unsigned long __ro_after_init efi_rng_seed; /* RNG Seed table */
/* * All runtime access to EFI goes through this structure: */extern struct efi { const efi_runtime_services_t *runtime; /* EFI runtime services table */ unsigned int runtime_version; /* Runtime services version */ unsigned int runtime_supported_mask;
unsigned long acpi; /* ACPI table (IA64 ext 0.71) */ unsigned long acpi20; /* ACPI table (ACPI 2.0) */ unsigned long smbios; /* SMBIOS table (32 bit entry point) */ unsigned long smbios3; /* SMBIOS table (64 bit entry point) */ unsigned long esrt; /* ESRT table */ unsigned long tpm_log; /* TPM2 Event Log table */ unsigned long tpm_final_log; /* TPM2 Final Events Log table */ unsigned long ovmf_debug_log; unsigned long mokvar_table; /* MOK variable config table */ unsigned long coco_secret; /* Confidential computing secret table */ unsigned long unaccepted; /* Unaccepted memory table */
efi_get_time_t *get_time; efi_set_time_t *set_time; efi_get_wakeup_time_t *get_wakeup_time; efi_set_wakeup_time_t *set_wakeup_time; efi_get_variable_t *get_variable; efi_get_next_variable_t *get_next_variable; efi_set_variable_t *set_variable; efi_set_variable_t *set_variable_nonblocking; efi_query_variable_info_t *query_variable_info; efi_query_variable_info_t *query_variable_info_nonblocking; efi_update_capsule_t *update_capsule; efi_query_capsule_caps_t *query_capsule_caps; efi_get_next_high_mono_count_t *get_next_high_mono_count; efi_reset_system_t *reset_system;
struct efi_memory_map memmap; unsigned long flags;} efi;
#define EFI_RT_SUPPORTED_GET_TIME 0x0001#define EFI_RT_SUPPORTED_SET_TIME 0x0002#define EFI_RT_SUPPORTED_GET_WAKEUP_TIME 0x0004#define EFI_RT_SUPPORTED_SET_WAKEUP_TIME 0x0008#define EFI_RT_SUPPORTED_GET_VARIABLE 0x0010#define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME 0x0020#define EFI_RT_SUPPORTED_SET_VARIABLE 0x0040#define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP 0x0080#define EFI_RT_SUPPORTED_CONVERT_POINTER 0x0100#define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT 0x0200#define EFI_RT_SUPPORTED_RESET_SYSTEM 0x0400#define EFI_RT_SUPPORTED_UPDATE_CAPSULE 0x0800#define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES 0x1000#define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO 0x2000
#define EFI_RT_SUPPORTED_ALL 0x3fff
#define EFI_RT_SUPPORTED_TIME_SERVICES 0x0003#define EFI_RT_SUPPORTED_WAKEUP_SERVICES 0x000c#define EFI_RT_SUPPORTED_VARIABLE_SERVICES 0x0070
extern struct mm_struct efi_mm;
static inline bool mm_is_efi(struct mm_struct *mm){ return IS_ENABLED(CONFIG_EFI) && mm == &efi_mm;}
static inline intefi_guidcmp (efi_guid_t left, efi_guid_t right){ return memcmp(&left, &right, sizeof (efi_guid_t));}
static inline char *efi_guid_to_str(efi_guid_t *guid, char *out){ sprintf(out, "%pUl", guid->b); return out;}
extern void efi_init (void);extern void efi_earlycon_reprobe(void);#ifdef CONFIG_EFIextern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */#elsestatic inline void efi_enter_virtual_mode (void) {}#endif#ifdef CONFIG_X86extern efi_status_t efi_query_variable_store(u32 attributes, unsigned long size, bool nonblocking);#else
static inline efi_status_t efi_query_variable_store(u32 attributes, unsigned long size, bool nonblocking){ return EFI_SUCCESS;}#endif
extern int __init __efi_memmap_init(struct efi_memory_map_data *data);extern int __init efi_memmap_init_early(struct efi_memory_map_data *data);extern int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size);extern void __init efi_memmap_unmap(void);
#ifdef CONFIG_EFI_ESRTextern void __init efi_esrt_init(void);#elsestatic inline void efi_esrt_init(void) { }#endifextern int efi_config_parse_tables(const efi_config_table_t *config_tables, int count, const efi_config_table_type_t *arch_tables);extern int efi_systab_check_header(const efi_table_hdr_t *systab_hdr);extern void efi_systab_report_header(const efi_table_hdr_t *systab_hdr, unsigned long fw_vendor);extern u64 efi_get_iobase (void);extern int efi_mem_type(unsigned long phys_addr);extern u64 efi_mem_attributes (unsigned long phys_addr);extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);extern int __init efi_uart_console_only (void);extern u64 efi_mem_desc_end(efi_memory_desc_t *md);extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);extern int __efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);extern void efi_mem_reserve(phys_addr_t addr, u64 size);extern int efi_mem_reserve_persistent(phys_addr_t addr, u64 size);extern u64 efi_get_fdt_params(struct efi_memory_map_data *data);extern struct kobject *efi_kobj;
extern int efi_reboot_quirk_mode;extern bool efi_poweroff_required(void);
extern unsigned long efi_mem_attr_table;
/* * efi_memattr_perm_setter - arch specific callback function passed into * efi_memattr_apply_permissions() that updates the * mapping permissions described by the second * argument in the page tables referred to by the * first argument. */typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *, bool);
extern void efi_memattr_init(void);extern int efi_memattr_apply_permissions(struct mm_struct *mm, efi_memattr_perm_setter fn);
/* * efi_memdesc_ptr - get the n-th EFI memmap descriptor * @map: the start of efi memmap * @desc_size: the size of space for each EFI memmap descriptor * @n: the index of efi memmap descriptor * * EFI boot service provides the GetMemoryMap() function to get a copy of the * current memory map which is an array of memory descriptors, each of * which describes a contiguous block of memory. It also gets the size of the * map, and the size of each descriptor, etc. * * Note that per section 6.2 of UEFI Spec 2.6 Errata A, the returned size of * each descriptor might not be equal to sizeof(efi_memory_memdesc_t), * since efi_memory_memdesc_t may be extended in the future. Thus the OS * MUST use the returned size of the descriptor to find the start of each * efi_memory_memdesc_t in the memory map array. This should only be used * during bootup since for_each_efi_memory_desc_xxx() is available after the * kernel initializes the EFI subsystem to set up struct efi_memory_map. */#define efi_memdesc_ptr(map, desc_size, n) \ (efi_memory_desc_t *)((void *)(map) + ((n) * (desc_size)))
/* Iterate through an efi_memory_map */#define for_each_efi_memory_desc_in_map(m, md) \ for ((md) = (m)->map; \ (md) && ((void *)(md) + (m)->desc_size) <= (m)->map_end; \ (md) = (void *)(md) + (m)->desc_size)
/** * for_each_efi_memory_desc - iterate over descriptors in efi.memmap * @md: the efi_memory_desc_t * iterator * * Once the loop finishes @md must not be accessed. */#define for_each_efi_memory_desc(md) \ for_each_efi_memory_desc_in_map(&efi.memmap, md)
/* * Format an EFI memory descriptor's type and attributes to a user-provided * character buffer, as per snprintf(), and return the buffer. */char * __init efi_md_typeattr_format(char *buf, size_t size, const efi_memory_desc_t *md);
typedef void (*efi_element_handler_t)(const char *source, const void *element_data, size_t element_size);extern int __init parse_efi_signature_list( const char *source, const void *data, size_t size, efi_element_handler_t (*get_handler_for_guid)(const efi_guid_t *));
/* * We play games with efi_enabled so that the compiler will, if * possible, remove EFI-related code altogether. */#define EFI_BOOT 0 /* Were we booted from EFI? */#define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */#define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */#define EFI_MEMMAP 4 /* Can we use EFI memory map? */#define EFI_64BIT 5 /* Is the firmware 64-bit? */#define EFI_PARAVIRT 6 /* Access is via a paravirt interface */#define EFI_ARCH_1 7 /* First arch-specific bit */#define EFI_DBG 8 /* Print additional debug info at runtime */#define EFI_MEM_ATTR 9 /* Did firmware publish an EFI_MEMORY_ATTRIBUTES table? */#define EFI_MEM_NO_SOFT_RESERVE 10 /* Is the kernel configured to ignore soft reservations? */#define EFI_PRESERVE_BS_REGIONS 11 /* Are EFI boot-services memory segments available? */
#ifdef CONFIG_EFI/* * Test whether the above EFI_* bits are enabled. */static inline bool efi_enabled(int feature){ return test_bit(feature, &efi.flags) != 0;}extern void efi_reboot(enum reboot_mode reboot_mode, const char *__unused);
bool __pure __efi_soft_reserve_enabled(void);
static inline bool __pure efi_soft_reserve_enabled(void){ return IS_ENABLED(CONFIG_EFI_SOFT_RESERVE) && __efi_soft_reserve_enabled();}
static inline bool efi_rt_services_supported(unsigned int mask){ return (efi.runtime_supported_mask & mask) == mask;}extern void efi_find_mirror(void);#elsestatic inline bool efi_enabled(int feature){ return false;}static inline voidefi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
static inline bool efi_soft_reserve_enabled(void){ return false;}
static inline bool efi_rt_services_supported(unsigned int mask){ return false;}
static inline void efi_find_mirror(void) {}#endif
extern int efi_status_to_err(efi_status_t status);
/* * Variable Attributes */#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020#define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ EFI_VARIABLE_BOOTSERVICE_ACCESS | \ EFI_VARIABLE_RUNTIME_ACCESS | \ EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \ EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \ EFI_VARIABLE_APPEND_WRITE)/* * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")) * not including trailing NUL */#define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN
/* * EFI Device Path information */#define EFI_DEV_HW 0x01#define EFI_DEV_PCI 1#define EFI_DEV_PCCARD 2#define EFI_DEV_MEM_MAPPED 3#define EFI_DEV_VENDOR 4#define EFI_DEV_CONTROLLER 5#define EFI_DEV_ACPI 0x02#define EFI_DEV_BASIC_ACPI 1#define EFI_DEV_EXPANDED_ACPI 2#define EFI_DEV_MSG 0x03#define EFI_DEV_MSG_ATAPI 1#define EFI_DEV_MSG_SCSI 2#define EFI_DEV_MSG_FC 3#define EFI_DEV_MSG_1394 4#define EFI_DEV_MSG_USB 5#define EFI_DEV_MSG_USB_CLASS 15#define EFI_DEV_MSG_I20 6#define EFI_DEV_MSG_MAC 11#define EFI_DEV_MSG_IPV4 12#define EFI_DEV_MSG_IPV6 13#define EFI_DEV_MSG_INFINIBAND 9#define EFI_DEV_MSG_UART 14#define EFI_DEV_MSG_VENDOR 10#define EFI_DEV_MEDIA 0x04#define EFI_DEV_MEDIA_HARD_DRIVE 1#define EFI_DEV_MEDIA_CDROM 2#define EFI_DEV_MEDIA_VENDOR 3#define EFI_DEV_MEDIA_FILE 4#define EFI_DEV_MEDIA_PROTOCOL 5#define EFI_DEV_MEDIA_REL_OFFSET 8#define EFI_DEV_BIOS_BOOT 0x05#define EFI_DEV_END_PATH 0x7F#define EFI_DEV_END_PATH2 0xFF#define EFI_DEV_END_INSTANCE 0x01#define EFI_DEV_END_ENTIRE 0xFF
struct efi_generic_dev_path { u8 type; u8 sub_type; u16 length;} __packed;
struct efi_acpi_dev_path { struct efi_generic_dev_path header; u32 hid; u32 uid;} __packed;
struct efi_pci_dev_path { struct efi_generic_dev_path header; u8 fn; u8 dev;} __packed;
struct efi_vendor_dev_path { struct efi_generic_dev_path header; efi_guid_t vendorguid; u8 vendordata[];} __packed;
struct efi_rel_offset_dev_path { struct efi_generic_dev_path header; u32 reserved; u64 starting_offset; u64 ending_offset;} __packed;
struct efi_mem_mapped_dev_path { struct efi_generic_dev_path header; u32 memory_type; u64 starting_addr; u64 ending_addr;} __packed;
struct efi_file_path_dev_path { struct efi_generic_dev_path header; efi_char16_t filename[];} __packed;
struct efi_dev_path { union { struct efi_generic_dev_path header; struct efi_acpi_dev_path acpi; struct efi_pci_dev_path pci; struct efi_vendor_dev_path vendor; struct efi_rel_offset_dev_path rel_offset; };} __packed;
struct device *efi_get_device_by_path(const struct efi_dev_path **node, size_t *len);
static inline void memrange_efi_to_native(u64 *addr, u64 *npages){ *npages = PFN_UP(*addr + (*npages<<EFI_PAGE_SHIFT)) - PFN_DOWN(*addr); *addr &= PAGE_MASK;}
/* * EFI Variable support. * * Different firmware drivers can expose their EFI-like variables using * the following. */
struct efivar_operations { efi_get_variable_t *get_variable; efi_get_next_variable_t *get_next_variable; efi_set_variable_t *set_variable; efi_set_variable_t *set_variable_nonblocking; efi_query_variable_store_t *query_variable_store; efi_query_variable_info_t *query_variable_info;};
struct efivars { struct kset *kset; const struct efivar_operations *ops;};
#ifdef CONFIG_X86u64 __attribute_const__ efivar_reserved_space(void);#elsestatic inline u64 efivar_reserved_space(void) { return 0; }#endif
/* * There is no actual upper limit specified for the variable name size. * * This limit exists only for practical purposes, since name conversions * are bounds-checked and name data is occasionally stored in-line. */#define EFI_VAR_NAME_LEN 1024
int efivars_register(struct efivars *efivars, const struct efivar_operations *ops);int efivars_unregister(struct efivars *efivars);
#ifdef CONFIG_EFIbool efivar_is_available(void);#elsestatic inline bool efivar_is_available(void) { return false; }#endif
bool efivar_supports_writes(void);
int efivar_lock(void);int efivar_trylock(void);void efivar_unlock(void);
efi_status_t efivar_get_variable(efi_char16_t *name, efi_guid_t *vendor, u32 *attr, unsigned long *size, void *data);
efi_status_t efivar_get_next_variable(unsigned long *name_size, efi_char16_t *name, efi_guid_t *vendor);
efi_status_t efivar_set_variable_locked(efi_char16_t *name, efi_guid_t *vendor, u32 attr, unsigned long data_size, void *data, bool nonblocking);
efi_status_t efivar_set_variable(efi_char16_t *name, efi_guid_t *vendor, u32 attr, unsigned long data_size, void *data);
efi_status_t efivar_query_variable_info(u32 attr, u64 *storage_space, u64 *remaining_space, u64 *max_variable_size);
#if IS_ENABLED(CONFIG_EFI_CAPSULE_LOADER)extern bool efi_capsule_pending(int *reset_type);
extern int efi_capsule_supported(efi_guid_t guid, u32 flags, size_t size, int *reset);
extern int efi_capsule_update(efi_capsule_header_t *capsule, phys_addr_t *pages);#elsestatic inline bool efi_capsule_pending(int *reset_type) { return false; }#endif
#ifdef CONFIG_EFIextern bool efi_runtime_disabled(void);#elsestatic inline bool efi_runtime_disabled(void) { return true; }#endif
extern void efi_call_virt_check_flags(unsigned long flags, const void *caller);extern unsigned long efi_call_virt_save_flags(void);
void efi_runtime_assert_lock_held(void);
enum efi_secureboot_mode { efi_secureboot_mode_unset, efi_secureboot_mode_unknown, efi_secureboot_mode_disabled, efi_secureboot_mode_enabled,};
static inlineenum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var){ u8 secboot, setupmode = 0; efi_status_t status; unsigned long size;
size = sizeof(secboot); status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &secboot); if (status == EFI_NOT_FOUND) return efi_secureboot_mode_disabled; if (status != EFI_SUCCESS) return efi_secureboot_mode_unknown;
size = sizeof(setupmode); get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode); if (secboot == 0 || setupmode == 1) return efi_secureboot_mode_disabled; return efi_secureboot_mode_enabled;}
#ifdef CONFIG_EFI_EMBEDDED_FIRMWAREvoid efi_check_for_embedded_firmwares(void);#elsestatic inline void efi_check_for_embedded_firmwares(void) { }#endif
#define arch_efi_call_virt(p, f, args...) ((p)->f(args))
/* * Arch code must implement the following three routines: * * * arch_efi_call_virt_setup() * * Sets up the environment for the call (e.g. switching page tables, * allowing kernel-mode use of floating point, if required). * * * arch_efi_call_virt() * * Performs the call. This routine takes a variable number of arguments so * it must be implemented as a variadic preprocessor macro. * * * arch_efi_call_virt_teardown() * * Restores the usual kernel environment once the call has returned. */
#define efi_call_virt_pointer(p, f, args...) \({ \ typeof((p)->f(args)) __s; \ unsigned long __flags; \ \ arch_efi_call_virt_setup(); \ \ __flags = efi_call_virt_save_flags(); \ __s = arch_efi_call_virt(p, f, args); \ efi_call_virt_check_flags(__flags, NULL); \ \ arch_efi_call_virt_teardown(); \ \ __s; \})
#define EFI_RANDOM_SEED_SIZE 32U // BLAKE2S_HASH_SIZE
struct linux_efi_random_seed { u32 size; u8 bits[];};
struct linux_efi_tpm_eventlog { u32 size; u32 final_events_preboot_size; u8 version; u8 log[];};
extern int efi_tpm_eventlog_init(void);
struct efi_tcg2_final_events_table { u64 version; u64 nr_events; u8 events[];};extern int efi_tpm_final_log_size;
extern unsigned long rci2_table_phys;
efi_status_tefi_call_acpi_prm_handler(efi_status_t (__efiapi *handler_addr)(u64, void *), u64 param_buffer_addr, void *context);
/* * efi_runtime_service() function identifiers. * "NONE" is used by efi_recover_from_page_fault() to check if the page * fault happened while executing an efi runtime service. */enum efi_rts_ids { EFI_NONE, EFI_GET_TIME, EFI_SET_TIME, EFI_GET_WAKEUP_TIME, EFI_SET_WAKEUP_TIME, EFI_GET_VARIABLE, EFI_GET_NEXT_VARIABLE, EFI_SET_VARIABLE, EFI_QUERY_VARIABLE_INFO, EFI_GET_NEXT_HIGH_MONO_COUNT, EFI_RESET_SYSTEM, EFI_UPDATE_CAPSULE, EFI_QUERY_CAPSULE_CAPS, EFI_ACPI_PRM_HANDLER,};
union efi_rts_args;
/* * efi_runtime_work: Details of EFI Runtime Service work * @args: Pointer to union describing the arguments * @status: Status of executing EFI Runtime Service * @efi_rts_id: EFI Runtime Service function identifier * @efi_rts_comp: Struct used for handling completions * @caller: The caller of the runtime service */struct efi_runtime_work { union efi_rts_args *args; efi_status_t status; struct work_struct work; enum efi_rts_ids efi_rts_id; struct completion efi_rts_comp; const void *caller;};
extern struct efi_runtime_work efi_rts_work;
/* Workqueue to queue EFI Runtime Services */extern struct workqueue_struct *efi_rts_wq;
struct linux_efi_memreserve { int size; // allocated size of the array atomic_t count; // number of entries used phys_addr_t next; // pa of next struct instance struct { phys_addr_t base; phys_addr_t size; } entry[];};
#define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \ / sizeof_field(struct linux_efi_memreserve, entry[0]))
void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size);
/* * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table can be provided * to the kernel by an EFI boot loader. The table contains a packed * sequence of these entries, one for each named MOK variable. * The sequence is terminated by an entry with a completely NULL * name and 0 data size. */struct efi_mokvar_table_entry { char name[256]; u64 data_size; u8 data[];} __attribute((packed));
#ifdef CONFIG_LOAD_UEFI_KEYSextern void __init efi_mokvar_table_init(void);extern struct efi_mokvar_table_entry *efi_mokvar_entry_next( struct efi_mokvar_table_entry **mokvar_entry);extern struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name);#elsestatic inline void efi_mokvar_table_init(void) { }static inline struct efi_mokvar_table_entry *efi_mokvar_entry_next( struct efi_mokvar_table_entry **mokvar_entry){ return NULL;}static inline struct efi_mokvar_table_entry *efi_mokvar_entry_find( const char *name){ return NULL;}#endif
extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
struct linux_efi_coco_secret_area { u64 base_pa; u64 size;};
struct linux_efi_initrd { unsigned long base; unsigned long size;};
/* Header of a populated EFI secret area */#define EFI_SECRET_TABLE_HEADER_GUID EFI_GUID(0x1e74f542, 0x71dd, 0x4d66, 0x96, 0x3e, 0xef, 0x42, 0x87, 0xff, 0x17, 0x3b)
bool xen_efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table);
static __always_inlinebool efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table){ if (!IS_ENABLED(CONFIG_XEN_EFI)) return true; return xen_efi_config_table_is_usable(guid, table);}
umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n);
int ovmf_log_probe(unsigned long ovmf_debug_log_table);
/* * efivar ops event type */#define EFIVAR_OPS_RDONLY 0#define EFIVAR_OPS_RDWR 1
extern struct blocking_notifier_head efivar_ops_nh;
void efivars_generic_ops_register(void);void efivars_generic_ops_unregister(void);
#endif /* _LINUX_EFI_H */