104851772SMatt Flemingmenu "EFI (Extensible Firmware Interface) Support" 204851772SMatt Fleming depends on EFI 304851772SMatt Fleming 404851772SMatt Flemingconfig EFI_VARS 504851772SMatt Fleming tristate "EFI Variable Support via sysfs" 604851772SMatt Fleming depends on EFI 704851772SMatt Fleming default n 804851772SMatt Fleming help 904851772SMatt Fleming If you say Y here, you are able to get EFI (Extensible Firmware 1004851772SMatt Fleming Interface) variable information via sysfs. You may read, 1104851772SMatt Fleming write, create, and destroy EFI variables through this interface. 1204851772SMatt Fleming 1304851772SMatt Fleming Note that using this driver in concert with efibootmgr requires 1404851772SMatt Fleming at least test release version 0.5.0-test3 or later, which is 150e4ca02bSPeter Jones available from: 1604851772SMatt Fleming <http://linux.dell.com/efibootmgr/testing/efibootmgr-0.5.0-test3.tar.gz> 1704851772SMatt Fleming 1804851772SMatt Fleming Subsequent efibootmgr releases may be found at: 190e4ca02bSPeter Jones <http://github.com/vathpela/efibootmgr> 2004851772SMatt Fleming 213846c158SPeter Jonesconfig EFI_ESRT 223846c158SPeter Jones bool 233846c158SPeter Jones depends on EFI && !IA64 243846c158SPeter Jones default y 253846c158SPeter Jones 2604851772SMatt Flemingconfig EFI_VARS_PSTORE 2704851772SMatt Fleming tristate "Register efivars backend for pstore" 2804851772SMatt Fleming depends on EFI_VARS && PSTORE 2904851772SMatt Fleming default y 3004851772SMatt Fleming help 3104851772SMatt Fleming Say Y here to enable use efivars as a backend to pstore. This 3204851772SMatt Fleming will allow writing console messages, crash dumps, or anything 3304851772SMatt Fleming else supported by pstore to EFI variables. 3404851772SMatt Fleming 3504851772SMatt Flemingconfig EFI_VARS_PSTORE_DEFAULT_DISABLE 3604851772SMatt Fleming bool "Disable using efivars as a pstore backend by default" 3704851772SMatt Fleming depends on EFI_VARS_PSTORE 3804851772SMatt Fleming default n 3904851772SMatt Fleming help 4004851772SMatt Fleming Saying Y here will disable the use of efivars as a storage 4104851772SMatt Fleming backend for pstore by default. This setting can be overridden 4204851772SMatt Fleming using the efivars module's pstore_disable parameter. 4304851772SMatt Fleming 44926172d4SDave Youngconfig EFI_RUNTIME_MAP 45926172d4SDave Young bool "Export efi runtime maps to sysfs" 46*2965faa5SDave Young depends on X86 && EFI && KEXEC_CORE 47926172d4SDave Young default y 48926172d4SDave Young help 49926172d4SDave Young Export efi runtime memory maps to /sys/firmware/efi/runtime-map. 50926172d4SDave Young That memory map is used for example by kexec to set up efi virtual 51926172d4SDave Young mapping the 2nd kernel, but can also be used for debugging purposes. 52926172d4SDave Young 53926172d4SDave Young See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map. 54926172d4SDave Young 550302f71cSMark Salterconfig EFI_PARAMS_FROM_FDT 560302f71cSMark Salter bool 570302f71cSMark Salter help 580302f71cSMark Salter Select this config option from the architecture Kconfig if 590302f71cSMark Salter the EFI runtime support gets system table address, memory 600302f71cSMark Salter map address, and other parameters from the device tree. 610302f71cSMark Salter 62022ee6c5SArd Biesheuvelconfig EFI_RUNTIME_WRAPPERS 63022ee6c5SArd Biesheuvel bool 64022ee6c5SArd Biesheuvel 65f4f75ad5SArd Biesheuvelconfig EFI_ARMSTUB 66f4f75ad5SArd Biesheuvel bool 67f4f75ad5SArd Biesheuvel 6804851772SMatt Flemingendmenu 69fce7d3bfSJan Beulich 70fce7d3bfSJan Beulichconfig UEFI_CPER 71fce7d3bfSJan Beulich bool 72