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The Linux kernel configuration item CONFIG_EFI_VARS
has multiple definitions:
drivers/firmware/efi/Kconfig
The configuration item CONFIG_EFI_VARS:
CONFIG_EFI && ( CONFIG_X86 || CONFIG_IA64 )
efivars
, efivars
, efivars
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 this driver is only retained for compatibility with legacy users: new users should use the efivarfs filesystem instead.
drivers/firmware/Kconfig
The configuration item CONFIG_EFI_VARS:
CONFIG_EFI
efivars
, efivars
, efivars
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
arch/ia64/Kconfig
The configuration item CONFIG_EFI_VARS:
(none)
efivars
, efivars
, efivars
If you say Y here, you are able to get EFI (Extensible Firmware Interface) variable information in /proc/efi/vars. You may read, write, create, and destroy EFI variables through this interface.
To use this option, you have to check that the "/proc file system support" (PROC_FS) is enabled, too.
Raw data from LKDDb:
lkddb fs "efivarfs" : CONFIG_EFI_VARS : drivers/firmware/efivars.c # in 3.8–3.9
lkddb module efivars CONFIG_EFI_VARS : arch/ia64/Kconfig : "/proc/efi/vars support" # in 2.5.45–2.5.75, 2.6.0–2.6.5
lkddb module efivars CONFIG_EFI_VARS : drivers/firmware/Kconfig : "EFI Variable Support via sysfs" # in 2.6.6–2.6.39, 3.0–3.9
lkddb module efivars CONFIG_EFI_VARS : drivers/firmware/efi/Kconfig : "EFI Variable Support via sysfs" # in 3.10–3.19, 4.0–4.20, 5.0–5.19, 5.19+HEAD
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Automatically generated (in year 2024). See also LKDDb sources on GitLab