From: Ard Biesheuvel <ardb@kernel.org>
Date: Wed, 23 Sep 2020 10:20:10 +0200
Subject: efi: efivars: limit availability to X86 builds
Patch-mainline: v5.10-rc1
Git-commit: 963fabf37f6a94214a823df0a785e653cb8ad6ea
References: jsc#SLE-16407
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: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Lee, Chun-Yi <jlee@suse.com>
---
Documentation/arm/uefi.rst | 2 +-
drivers/firmware/efi/Kconfig | 13 ++++---------
drivers/firmware/efi/efivars.c | 1 -
3 files changed, 5 insertions(+), 11 deletions(-)
--- a/Documentation/arm/uefi.rst
+++ b/Documentation/arm/uefi.rst
@@ -23,7 +23,7 @@ makes it possible for the kernel to supp
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.
--- a/drivers/firmware/efi/Kconfig
+++ b/drivers/firmware/efi/Kconfig
@@ -4,20 +4,15 @@ menu "EFI (Extensible Firmware Interface
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
--- a/drivers/firmware/efi/efivars.c
+++ b/drivers/firmware/efi/efivars.c
@@ -22,7 +22,6 @@ MODULE_AUTHOR("Matt Domsch <Matt_Domsch@
MODULE_DESCRIPTION("sysfs interface to EFI Variables");
MODULE_LICENSE("GPL");
MODULE_VERSION(EFIVARS_VERSION);
-MODULE_ALIAS("platform:efivars");
static LIST_HEAD(efivar_sysfs_list);