initscripts/sysfs.sh: Mount /sys/firmware/efi/efivars when possible

Without this change, efibootmgr is unable to recover BootOrder if lost
during a previous write operation, e.g. exceeded storage capacity. This
is problematic using EFI to manage boot flow from Linux (E.g. via RAUC).

https://www.kernel.org/doc/Documentation/filesystems/efivarfs.txt

(From OE-Core rev: adc0a31169f59d0183c327347b9ab3bcebb1aef2)

Signed-off-by: Haris Okanovic <haris.okanovic@ni.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/meta/recipes-core/initscripts/initscripts-1.0/sysfs.sh b/meta/recipes-core/initscripts/initscripts-1.0/sysfs.sh
index f5b5b9904b..4871ee94e5 100644
--- a/meta/recipes-core/initscripts/initscripts-1.0/sysfs.sh
+++ b/meta/recipes-core/initscripts/initscripts-1.0/sysfs.sh
@@ -26,6 +26,10 @@ if [ -e /sys/kernel/config ] && grep -q configfs /proc/filesystems; then
   mount -t configfs configfs /sys/kernel/config
 fi
 
+if [ -e /sys/firmware/efi/efivars ] && grep -q efivarfs /proc/filesystems; then
+  mount -t efivarfs efivarfs /sys/firmware/efi/efivars
+fi
+
 if ! [ -e /dev/zero ] && [ -e /dev ] && grep -q devtmpfs /proc/filesystems; then
   mount -n -t devtmpfs devtmpfs /dev
 fi