diff options
Diffstat (limited to 'include/linux/efi.h')
| -rw-r--r-- | include/linux/efi.h | 1343 |
1 files changed, 932 insertions, 411 deletions
diff --git a/include/linux/efi.h b/include/linux/efi.h index 5f8f176154f7..2a43094e23f7 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_EFI_H #define _LINUX_EFI_H @@ -20,37 +21,63 @@ #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_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_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 -typedef struct { - u8 b[16]; -} efi_guid_t; +/* + * 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,d0,d1,d2,d3,d4,d5,d6,d7) \ -((efi_guid_t) \ -{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ - (b) & 0xff, ((b) >> 8) & 0xff, \ - (c) & 0xff, ((c) >> 8) & 0xff, \ - (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) +#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 @@ -82,20 +109,32 @@ typedef struct { #define EFI_MEMORY_MAPPED_IO 11 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12 #define EFI_PAL_CODE 13 -#define EFI_MAX_MEMORY_TYPE 14 +#define EFI_PERSISTENT_MEMORY 14 +#define EFI_UNACCEPTED_MEMORY 15 +#define EFI_MAX_MEMORY_TYPE 16 /* Attribute values: */ -#define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */ -#define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */ -#define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */ -#define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */ -#define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */ -#define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */ -#define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */ -#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */ +#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; @@ -113,15 +152,74 @@ typedef struct { 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; +}; + /* - * Allocation types for calls to boottime->allocate_pages. + * EFI capsule flags */ -#define EFI_ALLOCATE_ANY_PAGES 0 -#define EFI_ALLOCATE_MAX_ADDRESS 1 -#define EFI_ALLOCATE_ADDRESS 2 -#define EFI_MAX_ALLOCATE_TYPE 3 +#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; +}; -typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg); +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 @@ -150,127 +248,7 @@ typedef struct { u8 sets_to_zero; } efi_time_cap_t; -/* - * EFI Boot Services table - */ -typedef struct { - efi_table_hdr_t hdr; - void *raise_tpl; - void *restore_tpl; - void *allocate_pages; - void *free_pages; - void *get_memory_map; - void *allocate_pool; - void *free_pool; - void *create_event; - void *set_timer; - void *wait_for_event; - void *signal_event; - void *close_event; - void *check_event; - void *install_protocol_interface; - void *reinstall_protocol_interface; - void *uninstall_protocol_interface; - void *handle_protocol; - void *__reserved; - void *register_protocol_notify; - void *locate_handle; - void *locate_device_path; - void *install_configuration_table; - void *load_image; - void *start_image; - void *exit; - void *unload_image; - void *exit_boot_services; - void *get_next_monotonic_count; - void *stall; - void *set_watchdog_timer; - void *connect_controller; - void *disconnect_controller; - void *open_protocol; - void *close_protocol; - void *open_protocol_information; - void *protocols_per_handle; - void *locate_handle_buffer; - void *locate_protocol; - void *install_multiple_protocol_interfaces; - void *uninstall_multiple_protocol_interfaces; - void *calculate_crc32; - void *copy_mem; - void *set_mem; - void *create_event_ex; -} efi_boot_services_t; - -typedef enum { - EfiPciIoWidthUint8, - EfiPciIoWidthUint16, - EfiPciIoWidthUint32, - EfiPciIoWidthUint64, - EfiPciIoWidthFifoUint8, - EfiPciIoWidthFifoUint16, - EfiPciIoWidthFifoUint32, - EfiPciIoWidthFifoUint64, - EfiPciIoWidthFillUint8, - EfiPciIoWidthFillUint16, - EfiPciIoWidthFillUint32, - EfiPciIoWidthFillUint64, - EfiPciIoWidthMaximum -} EFI_PCI_IO_PROTOCOL_WIDTH; - -typedef enum { - EfiPciIoAttributeOperationGet, - EfiPciIoAttributeOperationSet, - EfiPciIoAttributeOperationEnable, - EfiPciIoAttributeOperationDisable, - EfiPciIoAttributeOperationSupported, - EfiPciIoAttributeOperationMaximum -} EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION; - - -typedef struct { - void *read; - void *write; -} efi_pci_io_protocol_access_t; - -typedef struct { - void *poll_mem; - void *poll_io; - efi_pci_io_protocol_access_t mem; - efi_pci_io_protocol_access_t io; - efi_pci_io_protocol_access_t pci; - void *copy_mem; - void *map; - void *unmap; - void *allocate_buffer; - void *free_buffer; - void *flush; - void *get_location; - void *attributes; - void *get_bar_attributes; - void *set_bar_attributes; - uint64_t romsize; - void *romimage; -} efi_pci_io_protocol; - -#define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001 -#define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002 -#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004 -#define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008 -#define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010 -#define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020 -#define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040 -#define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080 -#define EFI_PCI_IO_ATTRIBUTE_IO 0x0100 -#define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200 -#define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400 -#define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800 -#define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000 -#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000 -#define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000 -#define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000 -#define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000 -#define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000 -#define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000 +typedef union efi_boot_services efi_boot_services_t; /* * Types and defines for EFI ResetSystem @@ -287,21 +265,21 @@ typedef struct { typedef struct { efi_table_hdr_t hdr; - void *get_time; - void *set_time; - void *get_wakeup_time; - void *set_wakeup_time; - void *set_virtual_address_map; - void *convert_pointer; - void *get_variable; - void *get_next_variable; - void *set_variable; - void *get_next_high_mono_count; - void *reset_system; - void *update_capsule; - void *query_capsule_caps; - void *query_variable_info; -} efi_runtime_services_t; + 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); @@ -312,7 +290,7 @@ typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, 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, +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); @@ -333,61 +311,137 @@ 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); +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 + * 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 MPS_TABLE_GUID \ - EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) - -#define ACPI_TABLE_GUID \ - EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) - -#define ACPI_20_TABLE_GUID \ - EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 ) - -#define SMBIOS_TABLE_GUID \ - EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) - -#define SAL_SYSTEM_TABLE_GUID \ - EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d ) - -#define HCDP_TABLE_GUID \ - EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 ) - -#define UGA_IO_PROTOCOL_GUID \ - EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 ) - -#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 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) -#define LOADED_IMAGE_PROTOCOL_GUID \ - EFI_GUID( 0x5b1b31a1, 0x9562, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b ) - -#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \ - EFI_GUID( 0x9042a9de, 0x23dc, 0x4a38, 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a ) - -#define EFI_UGA_PROTOCOL_GUID \ - EFI_GUID( 0x982c298b, 0xf4fa, 0x41cb, 0xb8, 0x38, 0x77, 0xaa, 0x68, 0x8f, 0xb8, 0x39 ) +/* + * This GUID is used to pass to the kernel proper the struct screen_info + * structure that was populated by the stub based on the GOP protocol instance + * associated with ConOut + */ +#define LINUX_EFI_SCREEN_INFO_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) -#define EFI_PCI_IO_PROTOCOL_GUID \ - EFI_GUID( 0x4cf5b200, 0x68b8, 0x4ca5, 0x9e, 0xec, 0xb2, 0x3e, 0x3f, 0x50, 0x2, 0x9a ) +/* + * 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) -#define EFI_FILE_INFO_ID \ - EFI_GUID( 0x9576e92, 0x6d3f, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b ) +/* 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) -#define EFI_FILE_SYSTEM_GUID \ - EFI_GUID( 0x964e5b22, 0x6459, 0x11d2, 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b ) +/* 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; @@ -399,12 +453,22 @@ typedef struct { 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 table; -} efi_config_table_t; + 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)) @@ -447,113 +511,192 @@ typedef struct { u32 tables; } efi_system_table_32_t; -typedef struct { - efi_table_hdr_t hdr; - unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */ - u32 fw_revision; - unsigned long con_in_handle; - unsigned long con_in; - unsigned long con_out_handle; - unsigned long 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; +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 { - void *phys_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 { - u32 revision; - void *parent_handle; - efi_system_table_t *system_table; - void *device_handle; - void *file_path; - void *reserved; - u32 load_options_size; - void *load_options; - void *image_base; - __aligned_u64 image_size; - unsigned int image_code_type; - unsigned int image_data_type; - unsigned long unload; -} efi_loaded_image_t; + 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 { - u64 revision; - void *open_volume; -} efi_file_io_interface_t; + 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 { - u64 size; - u64 file_size; - u64 phys_size; - efi_time_t create_time; - efi_time_t last_access_time; - efi_time_t modification_time; - __aligned_u64 attribute; - efi_char16_t filename[1]; -} efi_file_info_t; + efi_guid_t signature_owner; + u8 signature_data[]; +} efi_signature_data_t; typedef struct { - u64 revision; - void *open; - void *close; - void *delete; - void *read; - void *write; - void *get_position; - void *set_position; - void *get_info; - void *set_info; - void *flush; -} efi_file_handle_t; - -#define EFI_FILE_MODE_READ 0x0000000000000001 -#define EFI_FILE_MODE_WRITE 0x0000000000000002 -#define EFI_FILE_MODE_CREATE 0x8000000000000000 + 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; -#define EFI_INVALID_TABLE_ADDR (~0UL) +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 { - efi_system_table_t *systab; /* EFI system table */ - unsigned int runtime_version; /* Runtime services version */ - unsigned long mps; /* MPS table */ - unsigned long acpi; /* ACPI table (IA64 ext 0.71) */ - unsigned long acpi20; /* ACPI table (ACPI 2.0) */ - unsigned long smbios; /* SM BIOS table */ - unsigned long sal_systab; /* SAL system table */ - unsigned long boot_info; /* boot info table */ - unsigned long hcdp; /* HCDP table */ - unsigned long uga; /* UGA table */ - unsigned long uv_systab; /* UV system 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_query_variable_info_t *query_variable_info; - 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; - efi_set_virtual_address_map_t *set_virtual_address_map; + 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 int efi_guidcmp (efi_guid_t left, efi_guid_t right) { @@ -561,43 +704,132 @@ efi_guidcmp (efi_guid_t left, efi_guid_t right) } static inline char * -efi_guid_unparse(efi_guid_t *guid, char *out) +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_get_pal_addr (void); -extern void efi_map_pal_code (void); -extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg); -extern void efi_gettimeofday (struct timespec *ts); +extern void efi_earlycon_reprobe(void); +#ifdef CONFIG_EFI extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */ +#else +static inline void efi_enter_virtual_mode (void) {} +#endif #ifdef CONFIG_X86 -extern void efi_late_init(void); -extern void efi_free_boot_services(void); -extern efi_status_t efi_query_variable_store(u32 attributes, unsigned long size); +extern efi_status_t efi_query_variable_store(u32 attributes, + unsigned long size, + bool nonblocking); #else -static inline void efi_late_init(void) {} -static inline void efi_free_boot_services(void) {} -static inline efi_status_t efi_query_variable_store(u32 attributes, unsigned long size) +static inline efi_status_t efi_query_variable_store(u32 attributes, + unsigned long size, + bool nonblocking) { return EFI_SUCCESS; } #endif -extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr); + +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_ESRT +extern void __init efi_esrt_init(void); +#else +static inline void efi_esrt_init(void) { } +#endif +extern 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 u32 efi_mem_type (unsigned long phys_addr); +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 void efi_initialize_iomem_resources(struct resource *code_resource, - struct resource *data_resource, struct resource *bss_resource); -extern void efi_get_time(struct timespec *now); -extern int efi_set_rtc_mmss(const struct timespec *now); -extern void efi_reserve_boot_services(void); -extern struct efi_memory_map memmap; +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 *)); /** * efi_range_is_wc - check the WC bit on an address range @@ -620,37 +852,68 @@ static inline int efi_range_is_wc(unsigned long start, unsigned long len) return 1; } -#ifdef CONFIG_EFI_PCDP -extern int __init efi_setup_pcdp_console(char *); -#endif - /* * 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_SYSTEM_TABLES 1 /* Can we use EFI system tables? */ #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 -# ifdef CONFIG_X86 -extern int efi_enabled(int facility); -# else -static inline int efi_enabled(int facility) +/* + * Test whether the above EFI_* bits are enabled. + */ +static inline bool efi_enabled(int feature) { - return 1; + 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; } -# endif +extern void efi_find_mirror(void); #else -static inline int efi_enabled(int facility) +static inline bool efi_enabled(int feature) { - return 0; + return false; } +static inline void +efi_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 */ @@ -662,7 +925,7 @@ static inline int efi_enabled(int facility) #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040 -#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ +#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \ EFI_VARIABLE_BOOTSERVICE_ACCESS | \ EFI_VARIABLE_RUNTIME_ACCESS | \ EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ @@ -673,14 +936,7 @@ static inline int efi_enabled(int facility) * Length of a GUID string (strlen("aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee")) * not including trailing NUL */ -#define EFI_VARIABLE_GUID_LEN 36 - -/* - * The type of search to perform when calling boottime->locate_handle - */ -#define EFI_LOCATE_ALL_HANDLES 0 -#define EFI_LOCATE_BY_REGISTER_NOTIFY 1 -#define EFI_LOCATE_BY_PROTOCOL 2 +#define EFI_VARIABLE_GUID_LEN UUID_STRING_LEN /* * EFI Device Path information @@ -714,6 +970,7 @@ static inline int efi_enabled(int facility) #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 @@ -721,10 +978,60 @@ static inline int efi_enabled(int facility) #define EFI_DEV_END_ENTIRE 0xFF struct efi_generic_dev_path { - u8 type; - u8 sub_type; - u16 length; -} __attribute ((packed)); + 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) { @@ -743,103 +1050,317 @@ 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 { - /* - * ->lock protects two things: - * 1) ->list - adds, removals, reads, writes - * 2) ops.[gs]et_variable() calls. - * It must not be held when creating sysfs entries or calling kmalloc. - * ops.get_next_variable() is only called from register_efivars() - * or efivar_update_sysfs_entries(), - * which is protected by the BKL, so that path is safe. - */ - spinlock_t lock; struct kset *kset; - struct kobject *kobject; const struct efivar_operations *ops; }; +#ifdef CONFIG_X86 +u64 __attribute_const__ efivar_reserved_space(void); +#else +static inline u64 efivar_reserved_space(void) { return 0; } +#endif + /* - * The maximum size of VariableName + Data = 1024 - * Therefore, it's reasonable to save that much - * space in each part of the structure, - * and we use a page for reading/writing. + * 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 -struct efi_variable { - efi_char16_t VariableName[1024/sizeof(efi_char16_t)]; - efi_guid_t VendorGuid; - unsigned long DataSize; - __u8 Data[1024]; - efi_status_t Status; - __u32 Attributes; -} __attribute__((packed)); - -struct efivar_entry { - struct efi_variable var; - struct list_head list; - struct kobject kobj; -}; +int efivars_register(struct efivars *efivars, + const struct efivar_operations *ops); +int efivars_unregister(struct efivars *efivars); -extern struct list_head efivar_sysfs_list; +#ifdef CONFIG_EFI +bool efivar_is_available(void); +#else +static inline bool efivar_is_available(void) { return false; } +#endif -static inline void -efivar_unregister(struct efivar_entry *var) +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); +#else +static inline bool efi_capsule_pending(int *reset_type) { return false; } +#endif + +#ifdef CONFIG_EFI +extern bool efi_runtime_disabled(void); +#else +static 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 inline +enum efi_secureboot_mode efi_get_secureboot_mode(efi_get_variable_t *get_var) { - kobject_put(&var->kobj); + 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; } -int efivars_register(struct efivars *efivars, - const struct efivar_operations *ops, - struct kobject *kobject); -int efivars_unregister(struct efivars *efivars); -struct kobject *efivars_kobject(void); +#ifdef CONFIG_EFI_EMBEDDED_FIRMWARE +void efi_check_for_embedded_firmwares(void); +#else +static 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_t +efi_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, +}; -int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *), - void *data, bool atomic, bool duplicates, - struct list_head *head); +union efi_rts_args; -void efivar_entry_add(struct efivar_entry *entry, struct list_head *head); -void efivar_entry_remove(struct efivar_entry *entry); +/* + * 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; +}; -int __efivar_entry_delete(struct efivar_entry *entry); -int efivar_entry_delete(struct efivar_entry *entry); +extern struct efi_runtime_work efi_rts_work; -int efivar_entry_size(struct efivar_entry *entry, unsigned long *size); -int __efivar_entry_get(struct efivar_entry *entry, u32 *attributes, - unsigned long *size, void *data); -int efivar_entry_get(struct efivar_entry *entry, u32 *attributes, - unsigned long *size, void *data); -int efivar_entry_set(struct efivar_entry *entry, u32 attributes, - unsigned long size, void *data, struct list_head *head); -int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes, - unsigned long *size, void *data, bool *set); -int efivar_entry_set_safe(efi_char16_t *name, efi_guid_t vendor, u32 attributes, - bool block, unsigned long size, void *data); +/* Workqueue to queue EFI Runtime Services */ +extern struct workqueue_struct *efi_rts_wq; -void efivar_entry_iter_begin(void); -void efivar_entry_iter_end(void); +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[]; +}; -int __efivar_entry_iter(int (*func)(struct efivar_entry *, void *), - struct list_head *head, void *data, - struct efivar_entry **prev); -int efivar_entry_iter(int (*func)(struct efivar_entry *, void *), - struct list_head *head, void *data); +#define EFI_MEMRESERVE_COUNT(size) (((size) - sizeof(struct linux_efi_memreserve)) \ + / sizeof_field(struct linux_efi_memreserve, entry[0])) -struct efivar_entry *efivar_entry_find(efi_char16_t *name, efi_guid_t guid, - struct list_head *head, bool remove); +void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size); -bool efivar_validate(struct efi_variable *var, u8 *data, unsigned long len); +/* + * 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_KEYS +extern 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); +#else +static 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 struct work_struct efivar_work; -void efivar_run_worker(void); +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_inline +bool 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 -#if defined(CONFIG_EFI_VARS) || defined(CONFIG_EFI_VARS_MODULE) -int efivars_sysfs_init(void); +extern struct blocking_notifier_head efivar_ops_nh; -#endif /* CONFIG_EFI_VARS */ +void efivars_generic_ops_register(void); +void efivars_generic_ops_unregister(void); #endif /* _LINUX_EFI_H */ |