Commit 963fabf3 authored by Ard Biesheuvel's avatar Ard Biesheuvel
Browse files

efi: efivars: limit availability to X86 builds 



CONFIG_EFI_VARS controls the code that exposes EFI variables via
sysfs entries, which was deprecated before support for non-Intel
architectures was added to EFI. So let's limit its availability
to Intel architectures for the time being, and hopefully remove
it entirely in the not too distant future.

While at it, let's remove the module alias so that the module is
no longer loaded automatically.

Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
parent 5ee70cd6

Documentation/arm/uefi.rst

+1 −1
Original line number Diff line number Diff line
@@ -23,7 +23,7 @@ makes it possible for the kernel to support additional features: 
For actually enabling [U]EFI support, enable:



- CONFIG_EFI=y

- CONFIG_EFI_VARS=y or m

- CONFIG_EFIVAR_FS=y or m



The implementation depends on receiving information about the UEFI environment

in a Flattened Device Tree (FDT) - so is only available with CONFIG_OF.

drivers/firmware/efi/Kconfig

+4 −9
Original line number Diff line number Diff line
@@ -4,20 +4,15 @@ menu "EFI (Extensible Firmware Interface) Support" 


config EFI_VARS

	tristate "EFI Variable Support via sysfs"

	depends on EFI

	depends on EFI && (X86 || IA64)

	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:

	  <http://linux.dell.com/efibootmgr/testing/efibootmgr-0.5.0-test3.tar.gz>



	  Subsequent efibootmgr releases may be found at:

	  <http://github.com/vathpela/efibootmgr>

	  Note that this driver is only retained for compatibility with

	  legacy users: new users should use the efivarfs filesystem

	  instead.



config EFI_ESRT

	bool

drivers/firmware/efi/efivars.c

+0 −1
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@@ -22,7 +22,6 @@ MODULE_AUTHOR("Matt Domsch <Matt_Domsch@Dell.com>"); 
MODULE_DESCRIPTION("sysfs interface to EFI Variables");

MODULE_LICENSE("GPL");

MODULE_VERSION(EFIVARS_VERSION);

MODULE_ALIAS("platform:efivars");



static LIST_HEAD(efivar_sysfs_list);

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