Backport initramfs-rootfs-image to the honister branch

recipes-kernel/images/initramfs-rootfs-image.bb

@@ -0,0 +1,26 @@
+DESCRIPTION = "Ramdisk image for pivoting into rootfs"
+
+PACKAGE_INSTALL = " \
+    base-passwd \
+    initramfs-module-copy-modules \
+    initramfs-module-rootfs \
+    initramfs-module-udev \
+    ${VIRTUAL-RUNTIME_base-utils} \
+    ${MACHINE_ESSENTIAL_EXTRA_RDEPENDS} \
+    ${ROOTFS_BOOTSTRAP_INSTALL} \
+"
+
+# Do not pollute the initrd image with rootfs features
+IMAGE_FEATURES = "debug-tweaks"
+IMAGE_LINGUAS = ""
+
+LICENSE = "MIT"
+
+IMAGE_FSTYPES = "${INITRAMFS_FSTYPES}"
+inherit core-image
+
+IMAGE_ROOTFS_SIZE = "8192"
+IMAGE_ROOTFS_EXTRA_SPACE = "0"
+
+# Exclude all kernel images from the rootfs
+PACKAGE_EXCLUDE = "kernel-image-*"

recipes-support/initrdscripts/files/copy-modules.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+# Copyright (C) 2022 Linaro Ltd.
+# Licensed on MIT
+
+copy_modules_enabled() {
+	[ -n "${bootparam_copy_modules}" -a -d /lib/modules/`uname -r` ]
+}
+
+copy_modules_run() {
+	if [ -n "$ROOTFS_DIR" ]; then
+		rm -rf $ROOTFS_DIR/lib/modules/`uname -r`
+		mkdir -p $ROOTFS_DIR/lib/modules
+		cp -a /lib/modules/`uname -r` $ROOTFS_DIR/lib/modules
+	else
+		debug "No rootfs has been set"
+	fi
+}

recipes-support/initrdscripts/initramfs-module-copy-modules_1.0.bb

@@ -0,0 +1,15 @@
+SUMMARY = "initramfs-framework module for copying kernel modules from initramfs to rootfs"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+RDEPENDS:${PN} = "initramfs-framework-base ${VIRTUAL-RUNTIME_base-utils}"
+
+SRC_URI = "file://copy-modules.sh"
+
+S = "${WORKDIR}"
+
+do_install() {
+    install -d ${D}/init.d
+    install -m 0755 ${WORKDIR}/copy-modules.sh ${D}/init.d/95-copy_modules
+}
+
+FILES:${PN} = "/init.d/"