[projects/geninitrd] Prepend cpu microcode to initrd image, so kernel will pick it up when LILO is in use.

[arekm]

commit b565e95c147bea4e68e4ccf5ad19906d51d2375b
Author: Arkadiusz Miśkiewicz <arekm at maven.pl>
Date:   Wed May 15 21:04:45 2019 +0200

    Prepend cpu microcode to initrd image, so kernel will pick it up when LILO is in use.

 geninitrd           | 19 +++++++++++++++++++
 geninitrd.sysconfig |  3 +++
 2 files changed, 22 insertions(+)
---
diff --git a/geninitrd b/geninitrd
index 118333c..b5d405a 100755
--- a/geninitrd
+++ b/geninitrd
@@ -17,6 +17,7 @@ PROGRAM=${0##*/}
 # list of geninitrd modules which need setup routine after commandline args parsing
 GENINITRD_MODS=""
 COMPRESS=yes
+LILO_MICROCODE=yes
 STRIP=/usr/bin/strip
 target=""
 kernel=""
@@ -1186,6 +1187,16 @@ compress_image() {
 	mv -f "$tmp" "$target"
 }
 
+# prepend file to image
+prepend_file_to_image() {
+	local file="$1" target="$2" tmp
+	tmp=$(mktemp "$target".XXXXXX) || die "mktemp failed"
+
+	cat "$file" "$target" > "$tmp" || return $?
+
+	mv -f "$tmp" "$target"
+}
+
 if [ -r /etc/sysconfig/geninitrd ]; then
 	. /etc/sysconfig/geninitrd
 fi
@@ -1801,6 +1812,14 @@ else
 	cp -a "$IMAGE" "$target"
 fi
 
+# microcode support for lilo
+if ! is_no "$LILO_MICROCODE"; then
+	if [ -x /sbin/lilo -a -f "/boot/intel-ucode.img" ]; then
+		verbose "Prepending $target with microcode image /boot/intel-ucode.img for LILO"
+		prepend_file_to_image "/boot/intel-ucode.img" "$target"
+	fi
+fi
+
 # XXX. check if bootsplash can output data to tmp dir not directly to initramfs image.
 initrd_gen_bootsplash "$target"
 
diff --git a/geninitrd.sysconfig b/geninitrd.sysconfig
index ccf177c..1268324 100644
--- a/geninitrd.sysconfig
+++ b/geninitrd.sysconfig
@@ -18,6 +18,9 @@
 # Default is to use initramfs for >= 2.5.0.
 #INITRDFS=initramfs
 
+# Should we prepend cpu microcode when lilo is installed
+#LILO_MICROCODE=no
+
 ## Use udev to create /dev?
 USE_UDEV=yes
 
================================================================

---- gitweb:

http://git.pld-linux.org/gitweb.cgi/projects/geninitrd.git/commitdiff/b565e95c147bea4e68e4ccf5ad19906d51d2375b