Pass dis_ucode_ldr to kernel for recovery mode

In case of a botched microcode update, this allows people to
easily roll back.

It will of course break in the more unlikely event that you are
missing a microcode update in your firmware that is needed to boot
the system, but editing the entry to remove an option is easier than
having to figure out the option and add it.

LP: #1831789

Gbp-Pq: Name recovery-dis_ucode_ldr.patch

diff --git a/util/grub.d/10_linux.in b/util/grub.d/10_linux.in
index 260e857245f4e722c40ff6465ca24684dcfd8199..4adb51d2958cf0d6da1eda3c0f6de7eaabaaa08b 100644 (file)
--- a/util/grub.d/10_linux.in
+++ b/util/grub.d/10_linux.in
@@ -228,6 +228,10 @@ case "$machine" in
     *) GENKERNEL_ARCH="$machine" ;;
 esac
 
+case "$GENKERNEL_ARCH" in
+  x86*) GRUB_CMDLINE_LINUX_RECOVERY="$GRUB_CMDLINE_LINUX_RECOVERY dis_ucode_ldr";;
+esac
+
 prepare_boot_cache=
 prepare_root_cache=
 boot_device_id=