arm-autonomy/xenguest-mkimage: add extra ramdisk support

Some guest images requires a ramdisk, that is built with a custom recipe.
This patch adds an option '--xen-ramdisk',
for xenguest-mkimage script to cover that.
Extra ramdisk support is also added to xenguest-image-extra bbclass,
via 'XENGUEST_EXTRA_RAMDISK' variable.

Issue-Id: SCM-1276
Change-Id: I8ec74a37c0c96ca83a3489911186f3b3262f80fd
Signed-off-by: Kamil Dziezyk <kamil.dziezyk@arm.com>
Reviewed-by: Diego Sueiro <diego.sueiro@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-autonomy/classes/xenguest-image-extra.bbclass

@@ -12,6 +12,11 @@ inherit xenguest-image
 # recipes, the last recipe setting it will prevail.
 XENGUEST_EXTRA_DTB ??= ""
 
+# Add a ramdisk file for the guest
+# Only one file should be added, if this is set multiple times or in several
+# recipes, the last recipe setting it will prevail.
+XENGUEST_EXTRA_RAMDISK ??= ""
+
 # Append something to the guest xen configuration
 # All files here will be merged together in the final xen configuration
 # This can contain several files or be used in several recipes
@@ -49,6 +54,13 @@ do_deploy_append() {
         call_xenguest_mkimage partial --xen-device-tree=${XENGUEST_EXTRA_DTB}
     fi
 
+    if [ -n "${XENGUEST_EXTRA_RAMDISK}" ]; then
+        if [ ! -f ${XENGUEST_EXTRA_RAMDISK} ]; then
+            die "xenguest-image: DTB file ${XENGUEST_EXTRA_RAMDISK} does not exist"
+        fi
+        call_xenguest_mkimage partial --xen-ramdisk=${XENGUEST_EXTRA_RAMDISK}
+    fi
+
     if [ -n "${XENGUEST_EXTRA_XENCONFIG}" ]; then
         for f in ${XENGUEST_EXTRA_XENCONFIG}; do
             if [ ! -f $f ]; then

meta-arm-autonomy/documentation/xenguest-mkimage.md

@@ -99,6 +99,8 @@ For a detailed help on available operations, please use:
   times to add several command line options.
 - --xen-device-tree=FILE: add dtb FILE as device tree. This both adding the
   file to the image and modifying the xen configuration to use it.
+- --xen-ramdisk=FILE: add ramdisk FILE as guest ramdisk. This both adding the
+  file to the image and modifying the xen configuration to use it.
 - --init-script=FILE: add guest init script. The script is embedded inside the
   image file. Several script can be added and the basename of FILE is used to
   distinguish them (calling the option twice with the same file will update the

meta-arm-autonomy/recipes-extended/xenguest/files/xenguest-mkimage

@@ -82,6 +82,9 @@ Xen configuration for the guest
 --xen-device-tree=      disable device tree parameter in xen configuration
 --xen-device-tree=FILE  set guest device tree in xen configuration and add
                          file to xen files
+--xen-ramdisk=          disable ramdisk parameter in xen configuration
+--xen-ramdisk=FILE      set guest ramdisk in xen configuration and add
+                         file to xen files
 --xen-disk=             disable disk parameter in xen configuration
 --xen-disk=DEV          set guest disk to device DEV (phy:DEV,xvda,w is set)
 --xen-append=FILE       append FILE content to xen configuration
@@ -668,6 +671,20 @@ for arg in "${@}"; do
                 install -m 644 ${optarg} ${IMAGE_TMPDIR}/files/guest.dtb
             fi
             ;;
+        --xen-ramdisk=*)
+            if [ -z "${optarg}" ]; then
+                xen_config_disable_param "ramdisk"
+                rm -f ${IMAGE_TMPDIR}/files/ramdisk.img
+            else
+                if [ ! -f ${optarg} ]; then
+                    echo "Error: invalid ramdisk file ${optarg}"
+                    exit 1
+                fi
+                xen_config_set_string "ramdisk" "files/ramdisk.img"
+                mkdir -p ${IMAGE_TMPDIR}/files
+                install -m 644 ${optarg} ${IMAGE_TMPDIR}/files/ramdisk.img
+            fi
+            ;;
         --xen-disk=*)
             if [ -z "${optarg}" ]; then
                 xen_config_disable_param "disk"