kernel_devicetree_vendor_dtb: Backport kernel-devicetree.bbclass

There is a series of patches [1] [2] [3] that were submitted to oe-core
master that have gone through some iterations.  It has partially stalled
in the upstreaming process but we need the effective changes to continue
our LTS plans for u-boot 2023.

This backports the effective changes of that patch against the kirkstone
version of the two classes, but renames them to make it obvious that we
are overriding them.  This should be a temporary change as we expect the
changes to be backported to oe-core kirkstone once the stall is gone.
This patch will be removed once it makes it into oe-core kirkstone.

[1] https://lists.openembedded.org/g/openembedded-core/message/180753
[2] https://lists.openembedded.org/g/openembedded-core/message/181190
[2] https://lists.openembedded.org/g/openembedded-core/message/181191

Signed-off-by: Randolph Sapp <rs@ti.com>
Signed-off-by: Ryan Eatmon <reatmon@ti.com>

2 files changed, 971 insertions, 0 deletions

diff --git a/meta-ti-bsp/classes/kernel_devicetree_vendor_dtb.bbclass b/meta-ti-bsp/classes/kernel_devicetree_vendor_dtb.bbclass
new file mode 100644
index 00000000..eaa73c4d
--- /dev/null
+++ b/meta-ti-bsp/classes/kernel_devicetree_vendor_dtb.bbclass
@@ -0,0 +1,134 @@
+# Support for device tree generation
+python () {
+    if not bb.data.inherits_class('nopackages', d):
+        d.appendVar("PACKAGES", " ${KERNEL_PACKAGE_NAME}-devicetree")
+        if d.getVar('KERNEL_DEVICETREE_BUNDLE') == '1':
+            d.appendVar("PACKAGES", " ${KERNEL_PACKAGE_NAME}-image-zimage-bundle")
+}
+
+# recursivly search for devicetree files
+def find_device_trees(d):
+    import glob
+    import os
+
+    file_paths = []
+    dest_dir = d.getVar('D')
+    full_dtb_dir = dest_dir + '/' + d.getVar('KERNEL_DTBDEST')
+
+    for file in glob.glob(full_dtb_dir + '/**/*.dtb*', recursive=True):
+        file_paths.append('/' + os.path.relpath(file, dest_dir))
+
+    return ' '.join(file_paths)
+
+FILES:${KERNEL_PACKAGE_NAME}-devicetree = "${@find_device_trees(d)}"
+FILES:${KERNEL_PACKAGE_NAME}-image-zimage-bundle = "/${KERNEL_IMAGEDEST}/zImage-*.dtb.bin"
+
+# Generate kernel+devicetree bundle
+KERNEL_DEVICETREE_BUNDLE ?= "0"
+
+# dtc flags passed via DTC_FLAGS env variable
+KERNEL_DTC_FLAGS ?= ""
+
+normalize_dtb () {
+        dtb="$1"
+        if echo $dtb | grep -q '/dts/'; then
+                bbwarn "$dtb contains the full path to the the dts file, but only the dtb name should be used."
+                dtb=`basename $dtb | sed 's,\.dts$,.dtb,g'`
+        fi
+        echo "$dtb"
+}
+
+get_real_dtb_path_in_kernel () {
+        dtb="$1"
+        dtb_path="${B}/arch/${ARCH}/boot/dts/$dtb"
+        if [ ! -e "$dtb_path" ]; then
+                dtb_path="${B}/arch/${ARCH}/boot/$dtb"
+        fi
+        echo "$dtb_path"
+}
+
+do_configure:append() {
+        if [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
+                if echo ${KERNEL_IMAGETYPE_FOR_MAKE} | grep -q 'zImage'; then
+                        case "${ARCH}" in
+                                "arm")
+                                config="${B}/.config"
+                                if ! grep -q 'CONFIG_ARM_APPENDED_DTB=y' $config; then
+                                        bbwarn 'CONFIG_ARM_APPENDED_DTB is NOT enabled in the kernel. Enabling it to allow the kernel to boot with the Device Tree appended!'
+                                        sed -i "/CONFIG_ARM_APPENDED_DTB[ =]/d" $config
+                                        echo "CONFIG_ARM_APPENDED_DTB=y" >> $config
+                                        echo "# CONFIG_ARM_ATAG_DTB_COMPAT is not set" >> $config
+                                fi
+                                ;;
+                                *)
+                                bberror "KERNEL_DEVICETREE_BUNDLE is not supported for ${ARCH}. Currently it is only supported for 'ARM'."
+                        esac
+                else
+                        bberror 'The KERNEL_DEVICETREE_BUNDLE requires the KERNEL_IMAGETYPE to contain zImage.'
+                fi
+        fi
+}
+
+do_compile:append() {
+        if [ -n "${KERNEL_DTC_FLAGS}" ]; then
+                export DTC_FLAGS="${KERNEL_DTC_FLAGS}"
+        fi
+
+        for dtbf in ${KERNEL_DEVICETREE}; do
+                dtb=`normalize_dtb "$dtbf"`
+                oe_runmake $dtb CC="${KERNEL_CC} $cc_extra " LD="${KERNEL_LD}" ${KERNEL_EXTRA_ARGS}
+        done
+}
+
+do_install:append() {
+        install -d ${D}/${KERNEL_DTBDEST}
+        for dtbf in ${KERNEL_DEVICETREE}; do
+                dtb=`normalize_dtb "$dtbf"`
+                dtb_path=`get_real_dtb_path_in_kernel "$dtb"`
+                if "${@'false' if oe.types.boolean(d.getVar('KERNEL_DTBVENDORED')) else 'true'}"; then
+                        dtb_ext=${dtb##*.}
+                        dtb_base_name=`basename $dtb .$dtb_ext`
+                        dtb=$dtb_base_name.$dtb_ext
+                fi
+                install -Dm 0644 $dtb_path ${D}/${KERNEL_DTBDEST}/$dtb
+        done
+}
+
+do_deploy:append() {
+        for dtbf in ${KERNEL_DEVICETREE}; do
+                dtb=`normalize_dtb "$dtbf"`
+                dtb_ext=${dtb##*.}
+                dtb_base_name=`basename $dtb .$dtb_ext`
+                install -d $deployDir
+                if "${@'false' if oe.types.boolean(d.getVar('KERNEL_DTBVENDORED')) else 'true'}"; then
+                        dtb=$dtb_base_name.$dtb_ext
+                fi
+                install -m 0644 ${D}/${KERNEL_DTBDEST}/$dtb $deployDir/$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext
+                if [ "${KERNEL_IMAGETYPE_SYMLINK}" = "1" ] ; then
+                        ln -sf $dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext $deployDir/$dtb_base_name.$dtb_ext
+                fi
+                if [ -n "${KERNEL_DTB_LINK_NAME}" ] ; then
+                        ln -sf $dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext $deployDir/$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext
+                fi
+                for type in ${KERNEL_IMAGETYPE_FOR_MAKE}; do
+                        if [ "$type" = "zImage" ] && [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
+                                cat ${D}/${KERNEL_IMAGEDEST}/$type \
+                                        $deployDir/$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext \
+                                        > $deployDir/$type-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT}
+                                if [ -n "${KERNEL_DTB_LINK_NAME}" ]; then
+                                        ln -sf $type-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT} \
+                                                $deployDir/$type-$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT}
+                                fi
+                                if [ -e "${KERNEL_OUTPUT_DIR}/${type}.initramfs" ]; then
+                                        cat ${KERNEL_OUTPUT_DIR}/${type}.initramfs \
+                                                $deployDir/$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext \
+                                                >  $deployDir/${type}-${INITRAMFS_NAME}-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT}
+                                        if [ -n "${KERNEL_DTB_LINK_NAME}" ]; then
+                                                ln -sf ${type}-${INITRAMFS_NAME}-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT} \
+                                                        $deployDir/${type}-${INITRAMFS_NAME}-$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT}
+                                        fi
+                                fi
+                        fi
+                done
+        done
+}
diff --git a/meta-ti-bsp/classes/kernel_vendor_dtb.bbclass b/meta-ti-bsp/classes/kernel_vendor_dtb.bbclass
new file mode 100644
index 00000000..c80c21d1
--- /dev/null
+++ b/meta-ti-bsp/classes/kernel_vendor_dtb.bbclass
@@ -0,0 +1,837 @@
+inherit linux-kernel-base kernel-module-split
+
+COMPATIBLE_HOST = ".*-linux"
+
+KERNEL_PACKAGE_NAME ??= "kernel"
+KERNEL_DEPLOYSUBDIR ??= "${@ "" if (d.getVar("KERNEL_PACKAGE_NAME") == "kernel") else d.getVar("KERNEL_PACKAGE_NAME") }"
+
+PROVIDES += "virtual/kernel"
+DEPENDS += "virtual/${TARGET_PREFIX}binutils virtual/${TARGET_PREFIX}gcc kmod-native bc-native bison-native"
+DEPENDS += "${@bb.utils.contains("INITRAMFS_FSTYPES", "cpio.lzo", "lzop-native", "", d)}"
+DEPENDS += "${@bb.utils.contains("INITRAMFS_FSTYPES", "cpio.lz4", "lz4-native", "", d)}"
+DEPENDS += "${@bb.utils.contains("INITRAMFS_FSTYPES", "cpio.zst", "zstd-native", "", d)}"
+PACKAGE_WRITE_DEPS += "depmodwrapper-cross"
+
+do_deploy[depends] += "depmodwrapper-cross:do_populate_sysroot gzip-native:do_populate_sysroot"
+do_clean[depends] += "make-mod-scripts:do_clean"
+
+CVE_PRODUCT ?= "linux_kernel"
+
+S = "${STAGING_KERNEL_DIR}"
+B = "${WORKDIR}/build"
+KBUILD_OUTPUT = "${B}"
+OE_TERMINAL_EXPORTS += "KBUILD_OUTPUT"
+
+# we include gcc above, we dont need virtual/libc
+INHIBIT_DEFAULT_DEPS = "1"
+
+KERNEL_IMAGETYPE ?= "zImage"
+INITRAMFS_IMAGE ?= ""
+INITRAMFS_IMAGE_NAME ?= "${@['${INITRAMFS_IMAGE}-${MACHINE}', ''][d.getVar('INITRAMFS_IMAGE') == '']}"
+INITRAMFS_TASK ?= ""
+INITRAMFS_IMAGE_BUNDLE ?= ""
+INITRAMFS_DEPLOY_DIR_IMAGE ?= "${DEPLOY_DIR_IMAGE}"
+INITRAMFS_MULTICONFIG ?= ""
+
+# KERNEL_VERSION is extracted from source code. It is evaluated as
+# None for the first parsing, since the code has not been fetched.
+# After the code is fetched, it will be evaluated as real version
+# number and cause kernel to be rebuilt. To avoid this, make
+# KERNEL_VERSION_NAME and KERNEL_VERSION_PKG_NAME depend on
+# LINUX_VERSION which is a constant.
+KERNEL_VERSION_NAME = "${@d.getVar('KERNEL_VERSION') or ""}"
+KERNEL_VERSION_NAME[vardepvalue] = "${LINUX_VERSION}"
+KERNEL_VERSION_PKG_NAME = "${@legitimize_package_name(d.getVar('KERNEL_VERSION'))}"
+KERNEL_VERSION_PKG_NAME[vardepvalue] = "${LINUX_VERSION}"
+
+python __anonymous () {
+    pn = d.getVar("PN")
+    kpn = d.getVar("KERNEL_PACKAGE_NAME")
+
+    # XXX Remove this after bug 11905 is resolved
+    #  FILES:${KERNEL_PACKAGE_NAME}-dev doesn't expand correctly
+    if kpn == pn:
+        bb.warn("Some packages (E.g. *-dev) might be missing due to "
+                "bug 11905 (variable KERNEL_PACKAGE_NAME == PN)")
+
+    # The default kernel recipe builds in a shared location defined by
+    # bitbake/distro confs: STAGING_KERNEL_DIR and STAGING_KERNEL_BUILDDIR.
+    # Set these variables to directories under ${WORKDIR} in alternate
+    # kernel recipes (I.e. where KERNEL_PACKAGE_NAME != kernel) so that they
+    # may build in parallel with the default kernel without clobbering.
+    if kpn != "kernel":
+        workdir = d.getVar("WORKDIR")
+        sourceDir = os.path.join(workdir, 'kernel-source')
+        artifactsDir = os.path.join(workdir, 'kernel-build-artifacts')
+        d.setVar("STAGING_KERNEL_DIR", sourceDir)
+        d.setVar("STAGING_KERNEL_BUILDDIR", artifactsDir)
+
+    # Merge KERNEL_IMAGETYPE and KERNEL_ALT_IMAGETYPE into KERNEL_IMAGETYPES
+    type = d.getVar('KERNEL_IMAGETYPE') or ""
+    alttype = d.getVar('KERNEL_ALT_IMAGETYPE') or ""
+    types = d.getVar('KERNEL_IMAGETYPES') or ""
+    if type not in types.split():
+        types = (type + ' ' + types).strip()
+    if alttype not in types.split():
+        types = (alttype + ' ' + types).strip()
+    d.setVar('KERNEL_IMAGETYPES', types)
+
+    # KERNEL_IMAGETYPES may contain a mixture of image types supported directly
+    # by the kernel build system and types which are created by post-processing
+    # the output of the kernel build system (e.g. compressing vmlinux ->
+    # vmlinux.gz in kernel_vendor_dtb_do_transform_kernel()).
+    # KERNEL_IMAGETYPE_FOR_MAKE should contain only image types supported
+    # directly by the kernel build system.
+    if not d.getVar('KERNEL_IMAGETYPE_FOR_MAKE'):
+        typeformake = set()
+        for type in types.split():
+            if type == 'vmlinux.gz':
+                type = 'vmlinux'
+            typeformake.add(type)
+
+        d.setVar('KERNEL_IMAGETYPE_FOR_MAKE', ' '.join(sorted(typeformake)))
+
+    kname = d.getVar('KERNEL_PACKAGE_NAME') or "kernel"
+    imagedest = d.getVar('KERNEL_IMAGEDEST')
+
+    for type in types.split():
+        if bb.data.inherits_class('nopackages', d):
+            continue
+        typelower = type.lower()
+        d.appendVar('PACKAGES', ' %s-image-%s' % (kname, typelower))
+        d.setVar('FILES:' + kname + '-image-' + typelower, '/' + imagedest + '/' + type + '-${KERNEL_VERSION_NAME}' + ' /' + imagedest + '/' + type)
+        d.appendVar('RDEPENDS:%s-image' % kname, ' %s-image-%s (= ${EXTENDPKGV})' % (kname, typelower))
+        splitmods = d.getVar("KERNEL_SPLIT_MODULES")
+        if splitmods != '1':
+            d.appendVar('RDEPENDS:%s-image' % kname, ' %s-modules (= ${EXTENDPKGV})' % kname)
+            d.appendVar('RDEPENDS:%s-image-%s' % (kname, typelower), ' %s-modules-${KERNEL_VERSION_PKG_NAME} (= ${EXTENDPKGV})' % kname)
+            d.setVar('PKG:%s-modules' % kname, '%s-modules-${KERNEL_VERSION_PKG_NAME}' % kname)
+            d.appendVar('RPROVIDES:%s-modules' % kname, '%s-modules-${KERNEL_VERSION_PKG_NAME}' % kname)
+
+        d.setVar('PKG:%s-image-%s' % (kname,typelower), '%s-image-%s-${KERNEL_VERSION_PKG_NAME}' % (kname, typelower))
+        d.setVar('ALLOW_EMPTY:%s-image-%s' % (kname, typelower), '1')
+        d.setVar('pkg_postinst:%s-image-%s' % (kname,typelower), """set +e
+if [ -n "$D" ]; then
+    ln -sf %s-${KERNEL_VERSION} $D/${KERNEL_IMAGEDEST}/%s > /dev/null 2>&1
+else
+    ln -sf %s-${KERNEL_VERSION} ${KERNEL_IMAGEDEST}/%s > /dev/null 2>&1
+    if [ $? -ne 0 ]; then
+        echo "Filesystem on ${KERNEL_IMAGEDEST}/ doesn't support symlinks, falling back to copied image (%s)."
+        install -m 0644 ${KERNEL_IMAGEDEST}/%s-${KERNEL_VERSION} ${KERNEL_IMAGEDEST}/%s
+    fi
+fi
+set -e
+""" % (type, type, type, type, type, type, type))
+        d.setVar('pkg_postrm:%s-image-%s' % (kname,typelower), """set +e
+if [ -f "${KERNEL_IMAGEDEST}/%s" -o -L "${KERNEL_IMAGEDEST}/%s" ]; then
+    rm -f ${KERNEL_IMAGEDEST}/%s  > /dev/null 2>&1
+fi
+set -e
+""" % (type, type, type))
+
+
+    image = d.getVar('INITRAMFS_IMAGE')
+    # If the INTIRAMFS_IMAGE is set but the INITRAMFS_IMAGE_BUNDLE is set to 0,
+    # the do_bundle_initramfs does nothing, but the INITRAMFS_IMAGE is built
+    # standalone for use by wic and other tools.
+    if image:
+        if d.getVar('INITRAMFS_MULTICONFIG'):
+            d.appendVarFlag('do_bundle_initramfs', 'mcdepends', ' mc::${INITRAMFS_MULTICONFIG}:${INITRAMFS_IMAGE}:do_image_complete')
+        else:
+            d.appendVarFlag('do_bundle_initramfs', 'depends', ' ${INITRAMFS_IMAGE}:do_image_complete')
+    if image and bb.utils.to_boolean(d.getVar('INITRAMFS_IMAGE_BUNDLE')):
+        bb.build.addtask('do_transform_bundled_initramfs', 'do_deploy', 'do_bundle_initramfs', d)
+
+    # NOTE: setting INITRAMFS_TASK is for backward compatibility
+    #       The preferred method is to set INITRAMFS_IMAGE, because
+    #       this INITRAMFS_TASK has circular dependency problems
+    #       if the initramfs requires kernel modules
+    image_task = d.getVar('INITRAMFS_TASK')
+    if image_task:
+        d.appendVarFlag('do_configure', 'depends', ' ${INITRAMFS_TASK}')
+}
+
+# Here we pull in all various kernel image types which we support.
+#
+# In case you're wondering why kernel.bbclass inherits the other image
+# types instead of the other way around, the reason for that is to
+# maintain compatibility with various currently existing meta-layers.
+# By pulling in the various kernel image types here, we retain the
+# original behavior of kernel.bbclass, so no meta-layers should get
+# broken.
+#
+# KERNEL_CLASSES by default pulls in kernel-uimage.bbclass, since this
+# used to be the default behavior when only uImage was supported. This
+# variable can be appended by users who implement support for new kernel
+# image types.
+
+KERNEL_CLASSES ?= " kernel-uimage "
+inherit ${KERNEL_CLASSES}
+
+# Old style kernels may set ${S} = ${WORKDIR}/git for example
+# We need to move these over to STAGING_KERNEL_DIR. We can't just
+# create the symlink in advance as the git fetcher can't cope with
+# the symlink.
+do_unpack[cleandirs] += " ${S} ${STAGING_KERNEL_DIR} ${B} ${STAGING_KERNEL_BUILDDIR}"
+do_clean[cleandirs] += " ${S} ${STAGING_KERNEL_DIR} ${B} ${STAGING_KERNEL_BUILDDIR}"
+python do_symlink_kernsrc () {
+    s = d.getVar("S")
+    if s[-1] == '/':
+        # drop trailing slash, so that os.symlink(kernsrc, s) doesn't use s as directory name and fail
+        s=s[:-1]
+    kernsrc = d.getVar("STAGING_KERNEL_DIR")
+    if s != kernsrc:
+        bb.utils.mkdirhier(kernsrc)
+        bb.utils.remove(kernsrc, recurse=True)
+        if d.getVar("EXTERNALSRC"):
+            # With EXTERNALSRC S will not be wiped so we can symlink to it
+            os.symlink(s, kernsrc)
+        else:
+            import shutil
+            shutil.move(s, kernsrc)
+            os.symlink(kernsrc, s)
+}
+# do_patch is normally ordered before do_configure, but
+# externalsrc.bbclass deletes do_patch, breaking the dependency of
+# do_configure on do_symlink_kernsrc.
+addtask symlink_kernsrc before do_patch do_configure after do_unpack
+
+inherit kernel-arch deploy
+
+PACKAGES_DYNAMIC += "^${KERNEL_PACKAGE_NAME}-module-.*"
+PACKAGES_DYNAMIC += "^${KERNEL_PACKAGE_NAME}-image-.*"
+PACKAGES_DYNAMIC += "^${KERNEL_PACKAGE_NAME}-firmware-.*"
+
+export OS = "${TARGET_OS}"
+export CROSS_COMPILE = "${TARGET_PREFIX}"
+
+KERNEL_RELEASE ?= "${KERNEL_VERSION}"
+
+# The directory where built kernel lies in the kernel tree
+KERNEL_OUTPUT_DIR ?= "arch/${ARCH}/boot"
+KERNEL_IMAGEDEST ?= "boot"
+KERNEL_DTBDEST ?= "${KERNEL_IMAGEDEST}"
+KERNEL_DTBVENDORED ?= "0"
+
+#
+# configuration
+#
+export CMDLINE_CONSOLE = "console=${@d.getVar("KERNEL_CONSOLE") or "ttyS0"}"
+
+KERNEL_VERSION = "${@get_kernelversion_headers('${B}')}"
+
+# kernels are generally machine specific
+PACKAGE_ARCH = "${MACHINE_ARCH}"
+
+# U-Boot support
+UBOOT_ENTRYPOINT ?= "20008000"
+UBOOT_LOADADDRESS ?= "${UBOOT_ENTRYPOINT}"
+
+# Some Linux kernel configurations need additional parameters on the command line
+KERNEL_EXTRA_ARGS ?= ""
+
+EXTRA_OEMAKE += ' CC="${KERNEL_CC}" LD="${KERNEL_LD}"'
+EXTRA_OEMAKE += ' HOSTCC="${BUILD_CC}" HOSTCFLAGS="${BUILD_CFLAGS}" HOSTLDFLAGS="${BUILD_LDFLAGS}" HOSTCPP="${BUILD_CPP}"'
+EXTRA_OEMAKE += ' HOSTCXX="${BUILD_CXX}" HOSTCXXFLAGS="${BUILD_CXXFLAGS}" PAHOLE=false'
+
+KERNEL_ALT_IMAGETYPE ??= ""
+
+copy_initramfs() {
+        echo "Copying initramfs into ./usr ..."
+        # In case the directory is not created yet from the first pass compile:
+        mkdir -p ${B}/usr
+        # Find and use the first initramfs image archive type we find
+        rm -f ${B}/usr/${INITRAMFS_IMAGE_NAME}.cpio
+        for img in cpio cpio.gz cpio.lz4 cpio.lzo cpio.lzma cpio.xz cpio.zst; do
+                if [ -e "${INITRAMFS_DEPLOY_DIR_IMAGE}/${INITRAMFS_IMAGE_NAME}.$img" ]; then
+                        cp ${INITRAMFS_DEPLOY_DIR_IMAGE}/${INITRAMFS_IMAGE_NAME}.$img ${B}/usr/.
+                        case $img in
+                        *gz)
+                                echo "gzip decompressing image"
+                                gunzip -f ${B}/usr/${INITRAMFS_IMAGE_NAME}.$img
+                                break
+                                ;;
+                        *lz4)
+                                echo "lz4 decompressing image"
+                                lz4 -df ${B}/usr/${INITRAMFS_IMAGE_NAME}.$img ${B}/usr/${INITRAMFS_IMAGE_NAME}.cpio
+                                break
+                                ;;
+                        *lzo)
+                                echo "lzo decompressing image"
+                                lzop -df ${B}/usr/${INITRAMFS_IMAGE_NAME}.$img
+                                break
+                                ;;
+                        *lzma)
+                                echo "lzma decompressing image"
+                                lzma -df ${B}/usr/${INITRAMFS_IMAGE_NAME}.$img
+                                break
+                                ;;
+                        *xz)
+                                echo "xz decompressing image"
+                                xz -df ${B}/usr/${INITRAMFS_IMAGE_NAME}.$img
+                                break
+                                ;;
+                        *zst)
+                                echo "zst decompressing image"
+                                zstd -df ${B}/usr/${INITRAMFS_IMAGE_NAME}.$img
+                                break
+                                ;;
+                        esac
+                        break
+                fi
+        done
+        # Verify that the above loop found a initramfs, fail otherwise
+        [ -f ${B}/usr/${INITRAMFS_IMAGE_NAME}.cpio ] && echo "Finished copy of initramfs into ./usr" || die "Could not find any ${INITRAMFS_DEPLOY_DIR_IMAGE}/${INITRAMFS_IMAGE_NAME}.cpio{.gz|.lz4|.lzo|.lzma|.xz|.zst) for bundling; INITRAMFS_IMAGE_NAME might be wrong."
+}
+
+do_bundle_initramfs () {
+        if [ ! -z "${INITRAMFS_IMAGE}" -a x"${INITRAMFS_IMAGE_BUNDLE}" = x1 ]; then
+                echo "Creating a kernel image with a bundled initramfs..."
+                copy_initramfs
+                # Backing up kernel image relies on its type(regular file or symbolic link)
+                tmp_path=""
+                for imageType in ${KERNEL_IMAGETYPE_FOR_MAKE} ; do
+                        if [ -h ${KERNEL_OUTPUT_DIR}/$imageType ] ; then
+                                linkpath=`readlink -n ${KERNEL_OUTPUT_DIR}/$imageType`
+                                realpath=`readlink -fn ${KERNEL_OUTPUT_DIR}/$imageType`
+                                mv -f $realpath $realpath.bak
+                                tmp_path=$tmp_path" "$imageType"#"$linkpath"#"$realpath
+                        elif [ -f ${KERNEL_OUTPUT_DIR}/$imageType ]; then
+                                mv -f ${KERNEL_OUTPUT_DIR}/$imageType ${KERNEL_OUTPUT_DIR}/$imageType.bak
+                                tmp_path=$tmp_path" "$imageType"##"
+                        fi
+                done
+                use_alternate_initrd=CONFIG_INITRAMFS_SOURCE=${B}/usr/${INITRAMFS_IMAGE_NAME}.cpio
+                kernel_vendor_dtb_do_compile
+                # Restoring kernel image
+                for tp in $tmp_path ; do
+                        imageType=`echo $tp|cut -d "#" -f 1`
+                        linkpath=`echo $tp|cut -d "#" -f 2`
+                        realpath=`echo $tp|cut -d "#" -f 3`
+                        if [ -n "$realpath" ]; then
+                                mv -f $realpath $realpath.initramfs
+                                mv -f $realpath.bak $realpath
+                                ln -sf $linkpath.initramfs ${B}/${KERNEL_OUTPUT_DIR}/$imageType.initramfs
+                        else
+                                mv -f ${KERNEL_OUTPUT_DIR}/$imageType ${KERNEL_OUTPUT_DIR}/$imageType.initramfs
+                                mv -f ${KERNEL_OUTPUT_DIR}/$imageType.bak ${KERNEL_OUTPUT_DIR}/$imageType
+                        fi
+                done
+        fi
+}
+do_bundle_initramfs[dirs] = "${B}"
+
+kernel_vendor_dtb_do_transform_bundled_initramfs() {
+        # vmlinux.gz is not built by kernel
+        if (echo "${KERNEL_IMAGETYPES}" | grep -wq "vmlinux\.gz"); then
+                gzip -9cn < ${KERNEL_OUTPUT_DIR}/vmlinux.initramfs > ${KERNEL_OUTPUT_DIR}/vmlinux.gz.initramfs
+        fi
+}
+do_transform_bundled_initramfs[dirs] = "${B}"
+
+python do_devshell:prepend () {
+    os.environ["LDFLAGS"] = ''
+}
+
+addtask bundle_initramfs after do_install before do_deploy
+
+KERNEL_DEBUG_TIMESTAMPS ??= "0"
+
+kernel_vendor_dtb_do_compile() {
+        unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
+
+        # setup native pkg-config variables (kconfig scripts call pkg-config directly, cannot generically be overriden to pkg-config-native)
+        export PKG_CONFIG_DIR="${STAGING_DIR_NATIVE}${libdir_native}/pkgconfig"
+        export PKG_CONFIG_PATH="$PKG_CONFIG_DIR:${STAGING_DATADIR_NATIVE}/pkgconfig"
+        export PKG_CONFIG_LIBDIR="$PKG_CONFIG_DIR"
+        export PKG_CONFIG_SYSROOT_DIR=""
+
+        if [ "${KERNEL_DEBUG_TIMESTAMPS}" != "1" ]; then
+                # kernel sources do not use do_unpack, so SOURCE_DATE_EPOCH may not
+                # be set....
+                if [ "${SOURCE_DATE_EPOCH}" = "" -o "${SOURCE_DATE_EPOCH}" = "0" ]; then
+                        # The source directory is not necessarily a git repository, so we
+                        # specify the git-dir to ensure that git does not query a
+                        # repository in any parent directory.
+                        SOURCE_DATE_EPOCH=`git --git-dir="${S}/.git" log -1 --pretty=%ct 2>/dev/null || echo "${REPRODUCIBLE_TIMESTAMP_ROOTFS}"`
+                fi
+
+                ts=`LC_ALL=C date -d @$SOURCE_DATE_EPOCH`
+                export KBUILD_BUILD_TIMESTAMP="$ts"
+                export KCONFIG_NOTIMESTAMP=1
+                bbnote "KBUILD_BUILD_TIMESTAMP: $ts"
+        else
+                ts=`LC_ALL=C date`
+                export KBUILD_BUILD_TIMESTAMP="$ts"
+                bbnote "KBUILD_BUILD_TIMESTAMP: $ts"
+        fi
+        # The $use_alternate_initrd is only set from
+        # do_bundle_initramfs() This variable is specifically for the
+        # case where we are making a second pass at the kernel
+        # compilation and we want to force the kernel build to use a
+        # different initramfs image.  The way to do that in the kernel
+        # is to specify:
+        # make ...args... CONFIG_INITRAMFS_SOURCE=some_other_initramfs.cpio
+        if [ "$use_alternate_initrd" = "" ] && [ "${INITRAMFS_TASK}" != "" ] ; then
+                # The old style way of copying an prebuilt image and building it
+                # is turned on via INTIRAMFS_TASK != ""
+                copy_initramfs
+                use_alternate_initrd=CONFIG_INITRAMFS_SOURCE=${B}/usr/${INITRAMFS_IMAGE_NAME}.cpio
+        fi
+        for typeformake in ${KERNEL_IMAGETYPE_FOR_MAKE} ; do
+                oe_runmake ${PARALLEL_MAKE} ${typeformake} ${KERNEL_EXTRA_ARGS} $use_alternate_initrd
+        done
+}
+
+kernel_vendor_dtb_do_transform_kernel() {
+        # vmlinux.gz is not built by kernel
+        if (echo "${KERNEL_IMAGETYPES}" | grep -wq "vmlinux\.gz"); then
+                mkdir -p "${KERNEL_OUTPUT_DIR}"
+                gzip -9cn < ${B}/vmlinux > "${KERNEL_OUTPUT_DIR}/vmlinux.gz"
+        fi
+}
+do_transform_kernel[dirs] = "${B}"
+addtask transform_kernel after do_compile before do_install
+
+do_compile_kernelmodules() {
+        unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
+        if [ "${KERNEL_DEBUG_TIMESTAMPS}" != "1" ]; then
+                # kernel sources do not use do_unpack, so SOURCE_DATE_EPOCH may not
+                # be set....
+                if [ "${SOURCE_DATE_EPOCH}" = "" -o "${SOURCE_DATE_EPOCH}" = "0" ]; then
+                        # The source directory is not necessarily a git repository, so we
+                        # specify the git-dir to ensure that git does not query a
+                        # repository in any parent directory.
+                        SOURCE_DATE_EPOCH=`git --git-dir="${S}/.git" log -1 --pretty=%ct 2>/dev/null || echo "${REPRODUCIBLE_TIMESTAMP_ROOTFS}"`
+                fi
+
+                ts=`LC_ALL=C date -d @$SOURCE_DATE_EPOCH`
+                export KBUILD_BUILD_TIMESTAMP="$ts"
+                export KCONFIG_NOTIMESTAMP=1
+                bbnote "KBUILD_BUILD_TIMESTAMP: $ts"
+        else
+                ts=`LC_ALL=C date`
+                export KBUILD_BUILD_TIMESTAMP="$ts"
+                bbnote "KBUILD_BUILD_TIMESTAMP: $ts"
+        fi
+        if (grep -q -i -e '^CONFIG_MODULES=y$' ${B}/.config); then
+                oe_runmake -C ${B} ${PARALLEL_MAKE} modules ${KERNEL_EXTRA_ARGS}
+
+                # Module.symvers gets updated during the 
+                # building of the kernel modules. We need to
+                # update this in the shared workdir since some
+                # external kernel modules has a dependency on
+                # other kernel modules and will look at this
+                # file to do symbol lookups
+                cp ${B}/Module.symvers ${STAGING_KERNEL_BUILDDIR}/
+                # 5.10+ kernels have module.lds that we need to copy for external module builds
+                if [ -e "${B}/scripts/module.lds" ]; then
+                        install -Dm 0644 ${B}/scripts/module.lds ${STAGING_KERNEL_BUILDDIR}/scripts/module.lds
+                fi
+        else
+                bbnote "no modules to compile"
+        fi
+}
+addtask compile_kernelmodules after do_compile before do_strip
+
+kernel_vendor_dtb_do_install() {
+        #
+        # First install the modules
+        #
+        unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
+        if (grep -q -i -e '^CONFIG_MODULES=y$' .config); then
+                oe_runmake DEPMOD=echo MODLIB=${D}${nonarch_base_libdir}/modules/${KERNEL_VERSION} INSTALL_FW_PATH=${D}${nonarch_base_libdir}/firmware modules_install
+                rm "${D}${nonarch_base_libdir}/modules/${KERNEL_VERSION}/build"
+                rm "${D}${nonarch_base_libdir}/modules/${KERNEL_VERSION}/source"
+                # Remove empty module directories to prevent QA issues
+                find "${D}${nonarch_base_libdir}/modules/${KERNEL_VERSION}/kernel" -type d -empty -delete
+        else
+                bbnote "no modules to install"
+        fi
+
+        #
+        # Install various kernel output (zImage, map file, config, module support files)
+        #
+        install -d ${D}/${KERNEL_IMAGEDEST}
+
+        #
+        # When including an initramfs bundle inside a FIT image, the fitImage is created after the install task
+        # by do_assemble_fitimage_initramfs.
+        # This happens after the generation of the initramfs bundle (done by do_bundle_initramfs).
+        # So, at the level of the install task we should not try to install the fitImage. fitImage is still not
+        # generated yet.
+        # After the generation of the fitImage, the deploy task copies the fitImage from the build directory to
+        # the deploy folder.
+        #
+
+        for imageType in ${KERNEL_IMAGETYPES} ; do
+                if [ $imageType != "fitImage" ] || [ "${INITRAMFS_IMAGE_BUNDLE}" != "1" ] ; then
+                        install -m 0644 ${KERNEL_OUTPUT_DIR}/$imageType ${D}/${KERNEL_IMAGEDEST}/$imageType-${KERNEL_VERSION}
+                fi
+        done
+
+        install -m 0644 System.map ${D}/${KERNEL_IMAGEDEST}/System.map-${KERNEL_VERSION}
+        install -m 0644 .config ${D}/${KERNEL_IMAGEDEST}/config-${KERNEL_VERSION}
+        install -m 0644 vmlinux ${D}/${KERNEL_IMAGEDEST}/vmlinux-${KERNEL_VERSION}
+        [ -e Module.symvers ] && install -m 0644 Module.symvers ${D}/${KERNEL_IMAGEDEST}/Module.symvers-${KERNEL_VERSION}
+        install -d ${D}${sysconfdir}/modules-load.d
+        install -d ${D}${sysconfdir}/modprobe.d
+}
+
+# Must be ran no earlier than after do_kernel_checkout or else Makefile won't be in ${S}/Makefile
+do_kernel_version_sanity_check() {
+        if [ "x${KERNEL_VERSION_SANITY_SKIP}" = "x1" ]; then
+                exit 0
+        fi
+
+        # The Makefile determines the kernel version shown at runtime
+        # Don't use KERNEL_VERSION because the headers it grabs the version from aren't generated until do_compile
+        VERSION=$(grep "^VERSION =" ${S}/Makefile | sed s/.*=\ *//)
+        PATCHLEVEL=$(grep "^PATCHLEVEL =" ${S}/Makefile | sed s/.*=\ *//)
+        SUBLEVEL=$(grep "^SUBLEVEL =" ${S}/Makefile | sed s/.*=\ *//)
+        EXTRAVERSION=$(grep "^EXTRAVERSION =" ${S}/Makefile | sed s/.*=\ *//)
+
+        # Build a string for regex and a plain version string
+        reg="^${VERSION}\.${PATCHLEVEL}"
+        vers="${VERSION}.${PATCHLEVEL}"
+        if [ -n "${SUBLEVEL}" ]; then
+                # Ignoring a SUBLEVEL of zero is fine
+                if [ "${SUBLEVEL}" = "0" ]; then
+                        reg="${reg}(\.${SUBLEVEL})?"
+                else
+                        reg="${reg}\.${SUBLEVEL}"
+                        vers="${vers}.${SUBLEVEL}"
+                fi
+        fi
+        vers="${vers}${EXTRAVERSION}"
+        reg="${reg}${EXTRAVERSION}"
+
+        if [ -z `echo ${PV} | grep -E "${reg}"` ]; then
+                bbfatal "Package Version (${PV}) does not match of kernel being built (${vers}). Please update the PV variable to match the kernel source or set KERNEL_VERSION_SANITY_SKIP=\"1\" in your recipe."
+        fi
+        exit 0
+}
+
+addtask shared_workdir after do_compile before do_compile_kernelmodules
+addtask shared_workdir_setscene
+
+do_shared_workdir_setscene () {
+        exit 1
+}
+
+emit_depmod_pkgdata() {
+        # Stash data for depmod
+        install -d ${PKGDESTWORK}/${KERNEL_PACKAGE_NAME}-depmod/
+        echo "${KERNEL_VERSION}" > ${PKGDESTWORK}/${KERNEL_PACKAGE_NAME}-depmod/${KERNEL_PACKAGE_NAME}-abiversion
+        cp ${B}/System.map ${PKGDESTWORK}/${KERNEL_PACKAGE_NAME}-depmod/System.map-${KERNEL_VERSION}
+}
+
+PACKAGEFUNCS += "emit_depmod_pkgdata"
+
+do_shared_workdir[cleandirs] += " ${STAGING_KERNEL_BUILDDIR}"
+do_shared_workdir () {
+        cd ${B}
+
+        kerneldir=${STAGING_KERNEL_BUILDDIR}
+        install -d $kerneldir
+
+        #
+        # Store the kernel version in sysroots for module-base.bbclass
+        #
+
+        echo "${KERNEL_VERSION}" > $kerneldir/${KERNEL_PACKAGE_NAME}-abiversion
+
+        # Copy files required for module builds
+        cp System.map $kerneldir/System.map-${KERNEL_VERSION}
+        [ -e Module.symvers ] && cp Module.symvers $kerneldir/
+        cp .config $kerneldir/
+        mkdir -p $kerneldir/include/config
+        cp include/config/kernel.release $kerneldir/include/config/kernel.release
+        if [ -e certs/signing_key.x509 ]; then
+                # The signing_key.* files are stored in the certs/ dir in
+                # newer Linux kernels
+                mkdir -p $kerneldir/certs
+                cp certs/signing_key.* $kerneldir/certs/
+        elif [ -e signing_key.priv ]; then
+                cp signing_key.* $kerneldir/
+        fi
+
+        # We can also copy over all the generated files and avoid special cases
+        # like version.h, but we've opted to keep this small until file creep starts
+        # to happen
+        if [ -e include/linux/version.h ]; then
+                mkdir -p $kerneldir/include/linux
+                cp include/linux/version.h $kerneldir/include/linux/version.h
+        fi
+
+        # As of Linux kernel version 3.0.1, the clean target removes
+        # arch/powerpc/lib/crtsavres.o which is present in
+        # KBUILD_LDFLAGS_MODULE, making it required to build external modules.
+        if [ ${ARCH} = "powerpc" ]; then
+                if [ -e arch/powerpc/lib/crtsavres.o ]; then
+                        mkdir -p $kerneldir/arch/powerpc/lib/
+                        cp arch/powerpc/lib/crtsavres.o $kerneldir/arch/powerpc/lib/crtsavres.o
+                fi
+        fi
+
+        if [ -d include/generated ]; then
+                mkdir -p $kerneldir/include/generated/
+                cp -fR include/generated/* $kerneldir/include/generated/
+        fi
+
+        if [ -d arch/${ARCH}/include/generated ]; then
+                mkdir -p $kerneldir/arch/${ARCH}/include/generated/
+                cp -fR arch/${ARCH}/include/generated/* $kerneldir/arch/${ARCH}/include/generated/
+        fi
+
+        if (grep -q -i -e '^CONFIG_UNWINDER_ORC=y$' $kerneldir/.config); then
+                # With CONFIG_UNWINDER_ORC (the default in 4.14), objtool is required for
+                # out-of-tree modules to be able to generate object files.
+                if [ -x tools/objtool/objtool ]; then
+                        mkdir -p ${kerneldir}/tools/objtool
+                        cp tools/objtool/objtool ${kerneldir}/tools/objtool/
+                fi
+        fi
+
+        # When building with CONFIG_MODVERSIONS=y and CONFIG_RANDSTRUCT=y we need
+        # to copy the build assets generated for the randstruct seed to
+        # STAGING_KERNEL_BUILDDIR, otherwise the out-of-tree modules build will
+        # generate those assets which will result in a different
+        # RANDSTRUCT_HASHED_SEED
+        if [ -d scripts/basic ]; then
+                mkdir -p ${kerneldir}/scripts
+                cp -r scripts/basic ${kerneldir}/scripts
+        fi
+
+        if [ -d scripts/gcc-plugins ]; then
+                mkdir -p ${kerneldir}/scripts
+                cp -r scripts/gcc-plugins ${kerneldir}/scripts
+        fi
+
+}
+
+# We don't need to stage anything, not the modules/firmware since those would clash with linux-firmware
+SYSROOT_DIRS = ""
+
+KERNEL_CONFIG_COMMAND ?= "oe_runmake_call -C ${S} O=${B} olddefconfig || oe_runmake -C ${S} O=${B} oldnoconfig"
+
+python check_oldest_kernel() {
+    oldest_kernel = d.getVar('OLDEST_KERNEL')
+    kernel_version = d.getVar('KERNEL_VERSION')
+    tclibc = d.getVar('TCLIBC')
+    if tclibc == 'glibc':
+        kernel_version = kernel_version.split('-', 1)[0]
+        if oldest_kernel and kernel_version:
+            if bb.utils.vercmp_string(kernel_version, oldest_kernel) < 0:
+                bb.warn('%s: OLDEST_KERNEL is "%s" but the version of the kernel you are building is "%s" - therefore %s as built may not be compatible with this kernel. Either set OLDEST_KERNEL to an older version, or build a newer kernel.' % (d.getVar('PN'), oldest_kernel, kernel_version, tclibc))
+}
+
+check_oldest_kernel[vardepsexclude] += "OLDEST_KERNEL KERNEL_VERSION"
+do_configure[prefuncs] += "check_oldest_kernel"
+
+kernel_vendor_dtb_do_configure() {
+        # fixes extra + in /lib/modules/2.6.37+
+        # $ scripts/setlocalversion . => +
+        # $ make kernelversion => 2.6.37
+        # $ make kernelrelease => 2.6.37+
+        touch ${B}/.scmversion ${S}/.scmversion
+
+        if [ "${S}" != "${B}" ] && [ -f "${S}/.config" ] && [ ! -f "${B}/.config" ]; then
+                mv "${S}/.config" "${B}/.config"
+        fi
+
+        # Copy defconfig to .config if .config does not exist. This allows
+        # recipes to manage the .config themselves in do_configure:prepend().
+        if [ -f "${WORKDIR}/defconfig" ] && [ ! -f "${B}/.config" ]; then
+                cp "${WORKDIR}/defconfig" "${B}/.config"
+        fi
+
+        ${KERNEL_CONFIG_COMMAND}
+}
+
+do_savedefconfig() {
+        bbplain "Saving defconfig to:\n${B}/defconfig"
+        oe_runmake -C ${B} savedefconfig
+}
+do_savedefconfig[nostamp] = "1"
+addtask savedefconfig after do_configure
+
+inherit cml1 pkgconfig
+
+# Need LD, HOSTLDFLAGS and more for config operations
+KCONFIG_CONFIG_COMMAND:append = " ${EXTRA_OEMAKE}"
+
+EXPORT_FUNCTIONS do_compile do_transform_kernel do_transform_bundled_initramfs do_install do_configure
+
+# kernel-base becomes kernel-${KERNEL_VERSION}
+# kernel-image becomes kernel-image-${KERNEL_VERSION}
+PACKAGES = "${KERNEL_PACKAGE_NAME} ${KERNEL_PACKAGE_NAME}-base ${KERNEL_PACKAGE_NAME}-vmlinux ${KERNEL_PACKAGE_NAME}-image ${KERNEL_PACKAGE_NAME}-dev ${KERNEL_PACKAGE_NAME}-modules ${KERNEL_PACKAGE_NAME}-dbg"
+FILES:${PN} = ""
+FILES:${KERNEL_PACKAGE_NAME}-base = "${nonarch_base_libdir}/modules/${KERNEL_VERSION}/modules.order ${nonarch_base_libdir}/modules/${KERNEL_VERSION}/modules.builtin ${nonarch_base_libdir}/modules/${KERNEL_VERSION}/modules.builtin.modinfo"
+FILES:${KERNEL_PACKAGE_NAME}-image = ""
+FILES:${KERNEL_PACKAGE_NAME}-dev = "/${KERNEL_IMAGEDEST}/System.map* /${KERNEL_IMAGEDEST}/Module.symvers* /${KERNEL_IMAGEDEST}/config* ${KERNEL_SRC_PATH} ${nonarch_base_libdir}/modules/${KERNEL_VERSION}/build"
+FILES:${KERNEL_PACKAGE_NAME}-vmlinux = "/${KERNEL_IMAGEDEST}/vmlinux-${KERNEL_VERSION_NAME}"
+FILES:${KERNEL_PACKAGE_NAME}-modules = ""
+RDEPENDS:${KERNEL_PACKAGE_NAME} = "${KERNEL_PACKAGE_NAME}-base (= ${EXTENDPKGV})"
+# Allow machines to override this dependency if kernel image files are
+# not wanted in images as standard
+RRECOMMENDS:${KERNEL_PACKAGE_NAME}-base ?= "${KERNEL_PACKAGE_NAME}-image (= ${EXTENDPKGV})"
+PKG:${KERNEL_PACKAGE_NAME}-image = "${KERNEL_PACKAGE_NAME}-image-${@legitimize_package_name(d.getVar('KERNEL_VERSION'))}"
+RDEPENDS:${KERNEL_PACKAGE_NAME}-image += "${@oe.utils.conditional('KERNEL_IMAGETYPE', 'vmlinux', '${KERNEL_PACKAGE_NAME}-vmlinux (= ${EXTENDPKGV})', '', d)}"
+PKG:${KERNEL_PACKAGE_NAME}-base = "${KERNEL_PACKAGE_NAME}-${@legitimize_package_name(d.getVar('KERNEL_VERSION'))}"
+RPROVIDES:${KERNEL_PACKAGE_NAME}-base += "${KERNEL_PACKAGE_NAME}-${KERNEL_VERSION}"
+ALLOW_EMPTY:${KERNEL_PACKAGE_NAME} = "1"
+ALLOW_EMPTY:${KERNEL_PACKAGE_NAME}-base = "1"
+ALLOW_EMPTY:${KERNEL_PACKAGE_NAME}-image = "1"
+ALLOW_EMPTY:${KERNEL_PACKAGE_NAME}-modules = "1"
+DESCRIPTION:${KERNEL_PACKAGE_NAME}-modules = "Kernel modules meta package"
+
+pkg_postinst:${KERNEL_PACKAGE_NAME}-base () {
+        if [ ! -e "$D/lib/modules/${KERNEL_VERSION}" ]; then
+                mkdir -p $D/lib/modules/${KERNEL_VERSION}
+        fi
+        if [ -n "$D" ]; then
+                depmodwrapper -a -b $D ${KERNEL_VERSION}
+        else
+                depmod -a ${KERNEL_VERSION}
+        fi
+}
+
+PACKAGESPLITFUNCS:prepend = "split_kernel_packages "
+
+python split_kernel_packages () {
+    do_split_packages(d, root='${nonarch_base_libdir}/firmware', file_regex=r'^(.*)\.(bin|fw|cis|csp|dsp)$', output_pattern='${KERNEL_PACKAGE_NAME}-firmware-%s', description='Firmware for %s', recursive=True, extra_depends='')
+}
+
+# Many scripts want to look in arch/$arch/boot for the bootable
+# image. This poses a problem for vmlinux and vmlinuz based
+# booting. This task arranges to have vmlinux and vmlinuz appear
+# in the normalized directory location.
+do_kernel_link_images() {
+        if [ ! -d "${B}/arch/${ARCH}/boot" ]; then
+                mkdir ${B}/arch/${ARCH}/boot
+        fi
+        cd ${B}/arch/${ARCH}/boot
+        ln -sf ../../../vmlinux
+        if [ -f ../../../vmlinuz ]; then
+                ln -sf ../../../vmlinuz
+        fi
+        if [ -f ../../../vmlinuz.bin ]; then
+                ln -sf ../../../vmlinuz.bin
+        fi
+        if [ -f ../../../vmlinux.64 ]; then
+                ln -sf ../../../vmlinux.64
+        fi
+}
+addtask kernel_link_images after do_compile before do_strip
+
+python do_strip() {
+    import shutil
+
+    strip = d.getVar('STRIP')
+    extra_sections = d.getVar('KERNEL_IMAGE_STRIP_EXTRA_SECTIONS')
+    kernel_image = d.getVar('B') + "/" + d.getVar('KERNEL_OUTPUT_DIR') + "/vmlinux"
+
+    if (extra_sections and kernel_image.find(d.getVar('KERNEL_IMAGEDEST') + '/vmlinux') != -1):
+        kernel_image_stripped = kernel_image + ".stripped"
+        shutil.copy2(kernel_image, kernel_image_stripped)
+        oe.package.runstrip((kernel_image_stripped, 8, strip, extra_sections))
+        bb.debug(1, "KERNEL_IMAGE_STRIP_EXTRA_SECTIONS is set, stripping sections: " + \
+            extra_sections)
+}
+do_strip[dirs] = "${B}"
+
+addtask strip before do_sizecheck after do_kernel_link_images
+
+# Support checking the kernel size since some kernels need to reside in partitions
+# with a fixed length or there is a limit in transferring the kernel to memory.
+# If more than one image type is enabled, warn on any that don't fit but only fail
+# if none fit.
+do_sizecheck() {
+        if [ ! -z "${KERNEL_IMAGE_MAXSIZE}" ]; then
+                invalid=`echo ${KERNEL_IMAGE_MAXSIZE} | sed 's/[0-9]//g'`
+                if [ -n "$invalid" ]; then
+                        die "Invalid KERNEL_IMAGE_MAXSIZE: ${KERNEL_IMAGE_MAXSIZE}, should be an integer (The unit is Kbytes)"
+                fi
+                at_least_one_fits=
+                for imageType in ${KERNEL_IMAGETYPES} ; do
+                        size=`du -ks ${B}/${KERNEL_OUTPUT_DIR}/$imageType | awk '{print $1}'`
+                        if [ $size -gt ${KERNEL_IMAGE_MAXSIZE} ]; then
+                                bbwarn "This kernel $imageType (size=$size(K) > ${KERNEL_IMAGE_MAXSIZE}(K)) is too big for your device."
+                        else
+                                at_least_one_fits=y
+                        fi
+                done
+                if [ -z "$at_least_one_fits" ]; then
+                        die "All kernel images are too big for your device. Please reduce the size of the kernel by making more of it modular."
+                fi
+        fi
+}
+do_sizecheck[dirs] = "${B}"
+
+addtask sizecheck before do_install after do_strip
+
+inherit kernel-artifact-names
+
+kernel_vendor_dtb_do_deploy() {
+        deployDir="${DEPLOYDIR}"
+        if [ -n "${KERNEL_DEPLOYSUBDIR}" ]; then
+                deployDir="${DEPLOYDIR}/${KERNEL_DEPLOYSUBDIR}"
+                mkdir "$deployDir"
+        fi
+
+        for imageType in ${KERNEL_IMAGETYPES} ; do
+                baseName=$imageType-${KERNEL_IMAGE_NAME}
+
+                if [ -s ${KERNEL_OUTPUT_DIR}/$imageType.stripped ] ; then
+                        install -m 0644 ${KERNEL_OUTPUT_DIR}/$imageType.stripped $deployDir/$baseName${KERNEL_IMAGE_BIN_EXT}
+                else
+                        install -m 0644 ${KERNEL_OUTPUT_DIR}/$imageType $deployDir/$baseName${KERNEL_IMAGE_BIN_EXT}
+                fi
+                if [ -n "${KERNEL_IMAGE_LINK_NAME}" ] ; then
+                        ln -sf $baseName${KERNEL_IMAGE_BIN_EXT} $deployDir/$imageType-${KERNEL_IMAGE_LINK_NAME}${KERNEL_IMAGE_BIN_EXT}
+                fi
+                if [ "${KERNEL_IMAGETYPE_SYMLINK}" = "1" ] ; then
+                        ln -sf $baseName${KERNEL_IMAGE_BIN_EXT} $deployDir/$imageType
+                fi
+        done
+
+        if [ ${MODULE_TARBALL_DEPLOY} = "1" ] && (grep -q -i -e '^CONFIG_MODULES=y$' .config); then
+                mkdir -p ${D}${root_prefix}/lib
+                if [ -n "${SOURCE_DATE_EPOCH}" ]; then
+                        TAR_ARGS="--sort=name --clamp-mtime --mtime=@${SOURCE_DATE_EPOCH}"
+                else
+                        TAR_ARGS=""
+                fi
+                TAR_ARGS="$TAR_ARGS --owner=0 --group=0"
+                tar $TAR_ARGS -cv -C ${D}${root_prefix} lib | gzip -9n > $deployDir/modules-${MODULE_TARBALL_NAME}.tgz
+
+                if [ -n "${MODULE_TARBALL_LINK_NAME}" ] ; then
+                        ln -sf modules-${MODULE_TARBALL_NAME}.tgz $deployDir/modules-${MODULE_TARBALL_LINK_NAME}.tgz
+                fi
+        fi
+
+        if [ ! -z "${INITRAMFS_IMAGE}" -a x"${INITRAMFS_IMAGE_BUNDLE}" = x1 ]; then
+                for imageType in ${KERNEL_IMAGETYPES} ; do
+                        if [ "$imageType" = "fitImage" ] ; then
+                                continue
+                        fi
+                        initramfsBaseName=$imageType-${INITRAMFS_NAME}
+                        install -m 0644 ${KERNEL_OUTPUT_DIR}/$imageType.initramfs $deployDir/$initramfsBaseName${KERNEL_IMAGE_BIN_EXT}
+                        if [ -n "${INITRAMFS_LINK_NAME}" ] ; then
+                                ln -sf $initramfsBaseName${KERNEL_IMAGE_BIN_EXT} $deployDir/$imageType-${INITRAMFS_LINK_NAME}${KERNEL_IMAGE_BIN_EXT}
+                        fi
+                done
+        fi
+}
+
+# We deploy to filenames that include PKGV and PKGR, read the saved data to
+# ensure we get the right values for both
+do_deploy[prefuncs] += "read_subpackage_metadata"
+
+addtask deploy after do_populate_sysroot do_packagedata
+
+EXPORT_FUNCTIONS do_deploy
+
+# Add using Device Tree support
+inherit kernel_devicetree_vendor_dtb