Kconfig
config EFIVAR_FS
tristate "EFI Variable filesystem"
depends on EFI
help
efivarfs is a replacement filesystem for the old EFI
variable support via sysfs, as it doesn't suffer from the
same 1024-byte variable size limit.
To compile this file system support as a module, choose M
here. The module will be called efivarfs.
If unsure, say N.