menu "EFI (Extensible Firmware Interface) Support" depends on EFI config EFI_VARS tristate "EFI Variable Support via sysfs" depends on EFI default n help If you say Y here, you are able to get EFI (Extensible Firmware Interface) variable information via sysfs. You may read, write, create, and destroy EFI variables through this interface. Note that using this driver in concert with efibootmgr requires at least test release version 0.5.0-test3 or later, which is available from Matt Domsch's website located at: <http://linux.dell.com/efibootmgr/testing/efibootmgr-0.5.0-test3.tar.gz> Subsequent efibootmgr releases may be found at: <http://linux.dell.com/efibootmgr> config EFI_VARS_PSTORE tristate "Register efivars backend for pstore" depends on EFI_VARS && PSTORE default y help Say Y here to enable use efivars as a backend to pstore. This will allow writing console messages, crash dumps, or anything else supported by pstore to EFI variables. config EFI_VARS_PSTORE_DEFAULT_DISABLE bool "Disable using efivars as a pstore backend by default" depends on EFI_VARS_PSTORE default n help Saying Y here will disable the use of efivars as a storage backend for pstore by default. This setting can be overridden using the efivars module's pstore_disable parameter. config EFI_RUNTIME_MAP bool "Export efi runtime maps to sysfs" depends on X86 && EFI && KEXEC default y help Export efi runtime memory maps to /sys/firmware/efi/runtime-map. That memory map is used for example by kexec to set up efi virtual mapping the 2nd kernel, but can also be used for debugging purposes. See also Documentation/ABI/testing/sysfs-firmware-efi-runtime-map. endmenu config UEFI_CPER bool