1menu "EFI (Extensible Firmware Interface) Support" 2 depends on EFI 3 4config EFI_VARS 5 tristate "EFI Variable Support via sysfs" 6 depends on EFI 7 default n 8 help 9 If you say Y here, you are able to get EFI (Extensible Firmware 10 Interface) variable information via sysfs. You may read, 11 write, create, and destroy EFI variables through this interface. 12 13 Note that using this driver in concert with efibootmgr requires 14 at least test release version 0.5.0-test3 or later, which is 15 available from: 16 <http://linux.dell.com/efibootmgr/testing/efibootmgr-0.5.0-test3.tar.gz> 17 18 Subsequent efibootmgr releases may be found at: 19 <http://github.com/vathpela/efibootmgr> 20 21config EFI_ESRT 22 bool 23 depends on EFI && !IA64 24 default y 25 26config EFI_VARS_PSTORE 27 tristate "Register efivars backend for pstore" 28 depends on EFI_VARS && PSTORE 29 default y 30 help 31 Say Y here to enable use efivars as a backend to pstore. This 32 will allow writing console messages, crash dumps, or anything 33 else supported by pstore to EFI variables. 34 35config EFI_VARS_PSTORE_DEFAULT_DISABLE 36 bool "Disable using efivars as a pstore backend by default" 37 depends on EFI_VARS_PSTORE 38 default n 39 help 40 Saying Y here will disable the use of efivars as a storage 41 backend for pstore by default. This setting can be overridden 42 using the efivars module's pstore_disable parameter. 43 44config EFI_RUNTIME_MAP 45 bool "Export efi runtime maps to sysfs" 46 depends on X86 && EFI && KEXEC_CORE 47 default y 48 help 49 Export efi runtime memory maps to /sys/firmware/efi/runtime-map. 50 That memory map is used for example by kexec to set up efi virtual 51 mapping the 2nd kernel, but can also be used for debugging purposes. 52 53 See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map. 54 55config EFI_FAKE_MEMMAP 56 bool "Enable EFI fake memory map" 57 depends on EFI && X86 58 default n 59 help 60 Saying Y here will enable "efi_fake_mem" boot option. 61 By specifying this parameter, you can add arbitrary attribute 62 to specific memory range by updating original (firmware provided) 63 EFI memmap. 64 This is useful for debugging of EFI memmap related feature. 65 e.g. Address Range Mirroring feature. 66 67config EFI_MAX_FAKE_MEM 68 int "maximum allowable number of ranges in efi_fake_mem boot option" 69 depends on EFI_FAKE_MEMMAP 70 range 1 128 71 default 8 72 help 73 Maximum allowable number of ranges in efi_fake_mem boot option. 74 Ranges can be set up to this value using comma-separated list. 75 The default value is 8. 76 77config EFI_PARAMS_FROM_FDT 78 bool 79 help 80 Select this config option from the architecture Kconfig if 81 the EFI runtime support gets system table address, memory 82 map address, and other parameters from the device tree. 83 84config EFI_RUNTIME_WRAPPERS 85 bool 86 87config EFI_ARMSTUB 88 bool 89 90config EFI_BOOTLOADER_CONTROL 91 tristate "EFI Bootloader Control" 92 depends on EFI_VARS 93 default n 94 ---help--- 95 This module installs a reboot hook, such that if reboot() is 96 invoked with a string argument NNN, "NNN" is copied to the 97 "LoaderEntryOneShot" EFI variable, to be read by the 98 bootloader. If the string matches one of the boot labels 99 defined in its configuration, the bootloader will boot once 100 to that label. The "LoaderEntryRebootReason" EFI variable is 101 set with the reboot reason: "reboot" or "shutdown". The 102 bootloader reads this reboot reason and takes particular 103 action according to its policy. 104 105config EFI_CAPSULE_LOADER 106 tristate "EFI capsule loader" 107 depends on EFI 108 help 109 This option exposes a loader interface "/dev/efi_capsule_loader" for 110 users to load EFI capsules. This driver requires working runtime 111 capsule support in the firmware, which many OEMs do not provide. 112 113 Most users should say N. 114 115config EFI_TEST 116 tristate "EFI Runtime Service Tests Support" 117 depends on EFI 118 default n 119 help 120 This driver uses the efi.<service> function pointers directly instead 121 of going through the efivar API, because it is not trying to test the 122 kernel subsystem, just for testing the UEFI runtime service 123 interfaces which are provided by the firmware. This driver is used 124 by the Firmware Test Suite (FWTS) for testing the UEFI runtime 125 interfaces readiness of the firmware. 126 Details for FWTS are available from: 127 <https://wiki.ubuntu.com/FirmwareTestSuite> 128 129 Say Y here to enable the runtime services support via /dev/efi_test. 130 If unsure, say N. 131 132config APPLE_PROPERTIES 133 bool "Apple Device Properties" 134 depends on EFI_STUB && X86 135 select EFI_DEV_PATH_PARSER 136 select UCS2_STRING 137 help 138 Retrieve properties from EFI on Apple Macs and assign them to 139 devices, allowing for improved support of Apple hardware. 140 Properties that would otherwise be missing include the 141 Thunderbolt Device ROM and GPU configuration data. 142 143 If unsure, say Y if you have a Mac. Otherwise N. 144 145endmenu 146 147config UEFI_CPER 148 bool 149 150config EFI_DEV_PATH_PARSER 151 bool 152 depends on ACPI 153 default n 154