initramfs-framework: mount efivarfs to make Intel VROC work well

efivafs contain some meta data about Intel VROC, which will be
used by mdadm to create raid device.

These are preparation work to support boot from Intel VROC RAID
disk.

(From OE-Core rev: b25869c76975bbcec8d2f22f680e58976ec4de5c)

Signed-off-by: Liwei Song <liwei.song@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/meta/recipes-core/initrdscripts/initramfs-framework/init b/meta/recipes-core/initrdscripts/initramfs-framework/init
index 3c7e09422d..c71ce0ce8c 100755
--- a/meta/recipes-core/initrdscripts/initramfs-framework/init
+++ b/meta/recipes-core/initrdscripts/initramfs-framework/init
@@ -72,6 +72,7 @@ ROOTFS_DIR="/rootfs" # where to do the switch root
 MODULE_PRE_HOOKS=""  # functions to call before running each module
 MODULE_POST_HOOKS="" # functions to call after running each module
 MODULES_DIR=/init.d  # place to look for modules
+EFI_DIR=/sys/firmware/efi  # place to store device firmware information
 
 # make mount stop complaining about missing /etc/fstab
 touch /etc/fstab
@@ -81,6 +82,10 @@ mkdir -p /proc /sys /run/lock /var/lock
 mount -t proc proc /proc
 mount -t sysfs sysfs /sys
 
+if [ -d $EFI_DIR ];then
+        mount -t efivarfs none /sys/firmware/efi/efivars
+fi
+
 # populate bootparam environment
 for p in `cat /proc/cmdline`; do
         opt=`echo $p | cut -d'=' -f1`