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Make arm64 deb packages for the offical Raspberry Pi Foundation arm64 kernels, tested with ubuntu 23.04
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| #!/bin/bash -x | |
| # make_arm64_rpi_kernel_debs.sh | |
| # Builds arm64 debian packages from the CURRENT rpi firmware repository kernel which is installed by: | |
| # sudo rpi-update | |
| # This runs on an arm64 host with arm64 compilation tools... | |
| # or with some sort of cross-compilation setup. | |
| # Debs are put in $workdir/build | |
| # | |
| # This will NOT work in Raspbian unless you have an arm64 compilation | |
| # environment setup. Appears to work on | |
| # Raspberry Pi OS (64 bit) beta test version | |
| # | |
| # | |
| # | |
| # Install packages you should probably have if you are needing to install kernel headers. | |
| arch=$(uname -m) | |
| if [[ $arch == 'aarch64' ]]; then | |
| echo "" | |
| else | |
| echo "This needs to be run when booted into 64-bit mode." | |
| exit 1 | |
| fi | |
| # sudo apt install -f -y build-essential flex gawk bison libssl-dev bc dkms autoconf libtool || (sudo apt install -f -y || true) | |
| workdir="${HOME}/workdir" | |
| [[ ! -d "$workdir" ]] && ( mkdir -p "$workdir" || exit 1) | |
| [[ ! -d "$workdir"/tmp ]] && ( mkdir -p "$workdir"/tmp || exit 1) | |
| [[ ! -d "$workdir"/build ]] && ( mkdir -p "$workdir"/build || exit 1) | |
| echo "workdir is ${workdir}" | |
| tmpdir=$(mktemp -d deb_XXXX -p "$workdir"/tmp) | |
| echo "tmpdir is ${tmpdir}" | |
| dhpath="$tmpdir/headers" | |
| dipath="$tmpdir/image" | |
| src_temp=$(mktemp -d rpi_src_XXXi -p "$workdir"/tmp) | |
| git_base="https://github.com/raspberrypi/rpi-firmware" | |
| git_branch="master" | |
| FIRMWARE_REV=$(git ls-remote "https://github.com/raspberrypi/rpi-firmware" refs/heads/$git_branch | awk '{print $1}') | |
| cd "$src_temp" && curl -OLf https://github.com/raspberrypi/rpi-firmware/raw/$git_branch/git_hash | |
| KERNEL_REV=$(cat "$src_temp"/git_hash) | |
| SHORT_HASH=$(echo ${KERNEL_REV:0:7}) | |
| setup_git_fw() { | |
| if [[ -d "$workdir/rpi-firmware" ]]; then | |
| ( sudo rm -rf "$workdir"/rpi-firmware.old || true ) | |
| ( sudo mv "$workdir"/rpi-firmware "$workdir"/rpi-firmware.old || true ) | |
| ( sudo rm -rf "$workdir"/rpi-firmware.old || true ) | |
| fi | |
| cd "$workdir" && git clone --depth=1 -b $git_branch $git_base | |
| } | |
| update_git_fw() { | |
| [[ ! -d "$workdir/rpi-firmware" ]] && setup_git_fw | |
| ( cd "$workdir"/rpi-firmware && git fetch && git reset --hard origin/$git_branch ) || setup_git_fw | |
| cd "$workdir"/rpi-firmware && git config pull.ff only | |
| cd "$workdir"/rpi-firmware && git pull | |
| #cd "$workdir"/rpi-firmware && git_hash=$(git rev-parse origin/$git_branch) | |
| } | |
| check_zfs() { | |
| # Install zfs prerequisites | |
| sudo apt install -f -y autoconf libtool uuid-dev libudev-dev \ | |
| libssl-dev zlib1g-dev libaio-dev libattr1-dev python3 python3-dev \ | |
| python3-setuptools autoconf automake libtool gawk dkms libblkid-dev \ | |
| uuid-dev libudev-dev libssl-dev libelf-dev python3-cffi libffi-dev || true | |
| } | |
| make_headers_deb_files() { | |
| installed_size_headers=$(du -a "$dhpath" | tail -n 1 | awk '{print $1}') | |
| mkdir -p "$dhpath"/DEBIAN | |
| chmod 777 "$dhpath"/DEBIAN | |
| cat <<-EOF | dd status=none of="$dhpath"/DEBIAN/control | |
| Source: linux-$kver | |
| Section: kernel | |
| Priority: optional | |
| Maintainer: root <root@$SHORT_HASH> | |
| Standards-Version: 4.1.3 | |
| Homepage: http://www.kernel.org/ | |
| Package: linux-headers-$kver | |
| Architecture: all | |
| Version: $kver-1 | |
| Depends: build-essential, flex, bison, bc | |
| Installed-Size: $installed_size_headers | |
| Description: Linux kernel headers for $kver on arm64 | |
| This package provides kernel header files for $kver on arm64 | |
| built from: | |
| https://github.com/raspberrypi/linux/tree/$FIRMWARE_REV | |
| This is useful for people who need to build external modules | |
| EOF | |
| cat <<-EOF | dd status=none of="$dhpath"/DEBIAN/preinst | |
| #!/bin/sh | |
| set -e | |
| version=$kver | |
| if [ "\$1" = abort-upgrade ]; then | |
| exit 0 | |
| fi | |
| if [ "\$1" = install ]; then | |
| mkdir -p /lib/modules/\$version | |
| mkdir -p /usr/src/linux-headers-\$version || true | |
| cd /lib/modules/\$version && ln -snrvf /usr/src/linux-headers-\$version build | |
| fi | |
| if [ -d /etc/kernel/header_preinst.d ]; then | |
| DEB_MAINT_PARAMS="\$*" run-parts --report --exit-on-error --arg=\$version \\ | |
| --arg=\$image_path /etc/kernel/header_preinst.d | |
| fi | |
| exit 0 | |
| EOF | |
| chmod +x "$dhpath"/DEBIAN/preinst | |
| cat <<-EOF | dd status=none of="$dhpath"/DEBIAN/postinst | |
| #!/bin/bash | |
| set -e | |
| version=$kver | |
| [[ -f /etc/environment ]] && . /etc/environment | |
| if [ "\$1" != configure ]; then | |
| exit 0 | |
| fi | |
| if [ -d /etc/kernel/header_postinst.d ]; then | |
| DEB_MAINT_PARAMS="\$*" run-parts --report --exit-on-error --arg=\$version \\ | |
| /etc/kernel/header_postinst.d | |
| fi | |
| exit 0 | |
| EOF | |
| chmod +x "$dhpath"/DEBIAN/postinst | |
| chmod -R 0755 "$dhpath"/DEBIAN | |
| cd "$tmpdir" && sudo nice -n 20 dpkg-deb -b headers/ | |
| sudo mv "$tmpdir"/headers.deb "$workdir"/build/linux-headers-"${kver}"_all.deb | |
| } | |
| make_image_deb_files() { | |
| installed_size_image=$(du -a "$dipath" | tail -n 1 | awk '{print $1}') | |
| mkdir -p "$dipath"/DEBIAN | |
| chmod 777 "$dipath"/DEBIAN | |
| cat <<-EOF | dd status=none of="$dipath"/DEBIAN/control | |
| Package: linux-image-$kver | |
| Source: linux-$kver | |
| Version: $kver-1 | |
| Architecture: arm64 | |
| Maintainer: root <root@$SHORT_HASH> | |
| Installed-Size: $installed_size_image | |
| Section: kernel | |
| Priority: optional | |
| Homepage: http://www.kernel.org/ | |
| Description: Linux kernel, version $kver | |
| This package contains the Linux kernel, modules and corresponding other | |
| files, version: $kver. | |
| EOF | |
| cat <<-EOFF | dd status=none of="$dipath"/DEBIAN/postinst | |
| #!/bin/bash | |
| set -e | |
| version=$kver | |
| image_path=/boot/vmlinuz-\$version | |
| bootfsmount=\$(mount | grep boot | awk '{print \$3}') | |
| [[ \$(echo \$bootfsmount | wc -w) == "1" ]] && BOOTFS=\${bootfsmount} | |
| BOOTFS=\${BOOTFS:-/boot} | |
| # Install kernel (This avoids an issue if /boot is fat32.) | |
| mount -o remount,rw /boot 2>/dev/null || true | |
| cp /usr/share/rpikernelhack/vmlinuz-"$kver" \$image_path || true | |
| # If custom kernel= line is being used don't replace kernel8.img, | |
| # overlays, or dtb files. | |
| if ! vcgencmd get_config str | grep -q kernel ; then | |
| cp /usr/share/rpikernelhack/vmlinuz-"$kver" /boot/kernel8.img | |
| fi | |
| cp /usr/lib/linux-image-"$kver"/broadcom/*.dtb \$BOOTFS/ | |
| cp /usr/lib/linux-image-"$kver"/overlays/* \$BOOTFS/overlays/ | |
| # This is needed to keep flash-kernel from throwing an error. | |
| cp /usr/lib/linux-image-"$kver"/broadcom/*.dtb /etc/flash-kernel/dtbs/ | |
| # Make sure flash-kernel db allows for any kernel flavor | |
| if ! grep -q 'Kernel-Flavors: any' /etc/flash-kernel/db ; then | |
| mkdir -p /etc/flash-kernel/ | |
| cat <<FLASHDBRPI4 >> /etc/flash-kernel/db | |
| Machine: Raspberry Pi 4 Model B | |
| Machine: Raspberry Pi 4 Model B Rev 1.1 | |
| Machine: Raspberry Pi 4 Model B Rev 1.2 | |
| Machine: Raspberry Pi 4 Model B Rev 1.4 | |
| Machine: Raspberry Pi Compute Module 4 Rev 1.0 | |
| Machine: Raspberry Pi 400 Rev 1.0 | |
| Machine: Raspberry Pi 400 Rev 1.1 | |
| Machine: Raspberry Pi * | |
| Kernel-Flavors: any | |
| FLASHDBRPI4 | |
| fi | |
| # | |
| # When we install linux-image we have to run kernel postinst.d support to | |
| # generate the initramfs, create links etc. Should it have an associated | |
| # linux-image-extra package and we install that we also need to run kernel | |
| # postinst.d, to regenerate the initramfs. If we are installing both at the | |
| # same time, we necessarily trigger kernel postinst.d twice. As this includes | |
| # rebuilding the initramfs and reconfiguring the boot loader this is very time | |
| # consuming. | |
| # | |
| # Similarly for removal when we remove the linux-image-extra package we need to | |
| # run kernel postinst.d handling in order to pare down the initramfs to | |
| # linux-image contents only. When we remove the linux-image need to remove the | |
| # now redundant initramfs. If we are removing both at the same time, then | |
| # we will rebuilt the initramfs and then immediatly remove it. | |
| # | |
| # Switches to using a trigger against the linux-image package for all | |
| # postinst.d and postrm.d handling. On installation postinst.d gets triggered | |
| # twice once by linux-image and once by linux-image-extra. As triggers are | |
| # non-cumulative we will only run this processing once. When removing both | |
| # packages we will trigger postinst.d from linux-image-extra and then in | |
| # linux-image postrm.d we effectivly ignore the pending trigger and simply run | |
| # the postrm.d. This prevents us from rebuilding the initramfs. | |
| # | |
| if [ "\$1" = triggered ]; then | |
| trigger=/usr/lib/linux/triggers/\$version | |
| if [ -f "\$trigger" ]; then | |
| sh "\$trigger" | |
| rm -f "\$trigger" | |
| fi | |
| exit 0 | |
| fi | |
| if [ "\$1" != configure ]; then | |
| exit 0 | |
| fi | |
| depmod \$version | |
| if [ -f /lib/modules/\$version/.fresh-install ]; then | |
| change=install | |
| else | |
| change=upgrade | |
| fi | |
| # linux-update-symlinks \$change \$version \$image_path | |
| rm -f /lib/modules/\$version/.fresh-install | |
| if [ -d /etc/kernel/postinst.d ]; then | |
| mkdir -p /usr/lib/linux/triggers | |
| cat - >/usr/lib/linux/triggers/\$version <<EOF | |
| DEB_MAINT_PARAMS="\$*" run-parts --report --exit-on-error --arg=\$version \\ | |
| --arg=\$image_path /etc/kernel/postinst.d | |
| EOF | |
| dpkg-trigger --no-await linux-update-\$version | |
| fi | |
| exit 0 | |
| EOFF | |
| chmod +x "$dipath"/DEBIAN/postinst | |
| cat <<-EOF | dd status=none of="$dipath"/DEBIAN/triggers | |
| interest linux-update-$kver | |
| EOF | |
| cat <<-EOF | dd status=none of="$dipath"/DEBIAN/postrm | |
| #!/bin/sh | |
| set -e | |
| version=$kver | |
| image_path=/boot/vmlinuz-\$version | |
| rm -f /lib/modules/\$version/.fresh-install | |
| #if [ "\$1" != upgrade ] && command -v linux-update-symlinks >/dev/null; then | |
| # linux-update-symlinks remove \$version \$image_path | |
| #fi | |
| if [ -d /etc/kernel/postrm.d ]; then | |
| # We cannot trigger ourselves as at the end of this we will no longer | |
| # exist and can no longer respond to the trigger. The trigger would | |
| # then become lost. Therefore we clear any pending trigger and apply | |
| # postrm directly. | |
| if [ -f /usr/lib/linux/triggers/\$version ]; then | |
| echo "\$0 ... removing pending trigger" | |
| rm -f /usr/lib/linux/triggers/\$version | |
| fi | |
| DEB_MAINT_PARAMS="\$*" run-parts --report --exit-on-error --arg=\$version \\ | |
| --arg=\$image_path /etc/kernel/postrm.d | |
| fi | |
| if [ "\$1" = purge ]; then | |
| for extra_file in modules.dep modules.isapnpmap modules.pcimap \\ | |
| modules.usbmap modules.parportmap \\ | |
| modules.generic_string modules.ieee1394map \\ | |
| modules.ieee1394map modules.pnpbiosmap \\ | |
| modules.alias modules.ccwmap modules.inputmap \\ | |
| modules.symbols modules.ofmap \\ | |
| modules.seriomap modules.\\*.bin \\ | |
| modules.softdep modules.devname; do | |
| eval rm -f /lib/modules/\$version/\$extra_file | |
| done | |
| rmdir /lib/modules/\$version || true | |
| fi | |
| exit 0 | |
| EOF | |
| chmod +x "$dipath"/DEBIAN/postrm | |
| cat <<-EOF | dd status=none of="$dipath"/DEBIAN/preinst | |
| #!/bin/sh | |
| set -e | |
| version=$kver | |
| image_path=/boot/vmlinuz-\$version | |
| if [ "\$1" = abort-upgrade ]; then | |
| exit 0 | |
| fi | |
| if [ "\$1" = install ]; then | |
| # Create a flag file for postinst | |
| mkdir -p /lib/modules/\$version | |
| touch /lib/modules/\$version/.fresh-install | |
| fi | |
| if [ -d /etc/kernel/preinst.d ]; then | |
| DEB_MAINT_PARAMS="\$*" run-parts --report --exit-on-error --arg=\$version \\ | |
| --arg=\$image_path /etc/kernel/preinst.d | |
| fi | |
| if [ ! -e /lib/modules/\$version/build ]; then | |
| mkdir -p /usr/src/linux-headers-\$version || true | |
| cd /lib/modules/\$version && ln -snrvf /usr/src/linux-headers-\$version build || true | |
| fi | |
| exit 0 | |
| EOF | |
| chmod +x "$dipath"/DEBIAN/preinst | |
| cat <<-EOF | dd status=none of="$dipath"/DEBIAN/prerm | |
| #!/bin/sh | |
| set -e | |
| version=$kver | |
| image_path=/boot/vmlinuz-\$version | |
| if [ "\$1" != remove ]; then | |
| exit 0 | |
| fi | |
| linux-check-removal \$version | |
| if [ -d /etc/kernel/prerm.d ]; then | |
| DEB_MAINT_PARAMS="\$*" run-parts --report --exit-on-error --arg=\$version \\ | |
| --arg=\$image_path /etc/kernel/prerm.d | |
| fi | |
| exit 0 | |
| EOF | |
| chmod +x "$dipath"/DEBIAN/prerm | |
| chmod -R 0755 "$dipath"/DEBIAN | |
| cd "$tmpdir" && sudo nice -n 20 dpkg-deb -b image/ | |
| sudo mv "$tmpdir"/image.deb "$workdir"/build/linux-image-"${kver}"_arm64.deb | |
| } | |
| make_debs() { | |
| cd "$src_temp" && curl -L https://github.com/raspberrypi/linux/archive/"${KERNEL_REV}".tar.gz >rpi-linux.tar.gz | |
| cd "$src_temp" && curl --retry 3 -OL "https://github.com/raspberrypi/rpi-firmware/raw/${FIRMWARE_REV}/Module8.symvers" | |
| mv $src_temp/Module8.symvers $src_temp/Module.symvers | |
| kver=$(find "$workdir"/rpi-firmware/modules/ -type d -name '*v8+' -printf "%P\n") | |
| l=$kver | |
| # Build kernel header package | |
| # Adapted from scripts/package/builddeb | |
| mkdir -p $src_temp/header_tmp/debian | |
| cd $src_temp/header_tmp && tar --strip-components 1 -xf "${src_temp}"/rpi-linux.tar.gz | |
| SRCARCH=arm64 | |
| (cd $src_temp/header_tmp; cp $src_temp/header_tmp/arch/arm64/configs/bcm2711_defconfig $src_temp/header_tmp/.config) # copy .config manually to be where it's expected to be | |
| cd "$src_temp/header_tmp" && (yes "" | sudo make oldconfig) | |
| mkdir -p "$dhpath"/boot | |
| cp "$src_temp/header_tmp"/.config "$dhpath"/boot/config-"${kver}" | |
| cd "$src_temp/header_tmp" && (yes "" | sudo make modules_prepare) && sudo chown -R `id -u` . | |
| #cd "$src_temp/header_tmp" && (yes "" | sudo make scripts) && sudo chown -R `id -u` . | |
| (cd $src_temp/header_tmp; find . -name Makefile\* -o -name Kconfig\* -o -name \*.pl) > "$src_temp/header_tmp/debian/hdrsrcfiles" | |
| (cd $src_temp/header_tmp; find arch/*/include include scripts -type f -o -type l) >> "$src_temp/header_tmp/debian/hdrsrcfiles" | |
| (cd $src_temp/header_tmp; find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform) >> "$src_temp/header_tmp/debian/hdrsrcfiles" | |
| (cd $src_temp/header_tmp; find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f) >> "$src_temp/header_tmp/debian/hdrsrcfiles" | |
| (cd $src_temp/header_tmp; find tools/objtool -type f -executable) >> "$src_temp/header_tmp/debian/hdrobjfiles" | |
| (cd $src_temp/header_tmp; find arch/$SRCARCH/include modules.builtin.modinfo Module.symvers include scripts -type f) >> "$src_temp/header_tmp/debian/hdrobjfiles" | |
| (cd $src_temp/header_tmp; find scripts/gcc-plugins -name \*.so -o -name gcc-common.h) >> "$src_temp/header_tmp/debian/hdrobjfiles" | |
| destdir="$dhpath"/usr/src/linux-headers-$kver | |
| mkdir -p "$destdir" | |
| (cd $src_temp/header_tmp; tar -c -f - -T -) < "$src_temp/header_tmp/debian/hdrsrcfiles" | (cd $destdir; tar -xf -) | |
| (cd $src_temp/header_tmp; tar -c -f - -T -) < "$src_temp/header_tmp/debian/hdrobjfiles" | (cd $destdir; tar -xf -) | |
| (cd $src_temp/header_tmp; cp $src_temp/header_tmp/arch/arm64/configs/bcm2711_defconfig $destdir/.config) # copy .config manually to be where it's expected to be | |
| rm -rf "$src_temp/header_tmp/debian/hdrsrcfiles" "$src_temp/header_tmp/debian/hdrobjfiles" | |
| cp "$src_temp"/Module.symvers "$destdir"/Module.symvers | |
| make_headers_deb_files | |
| mkdir -p "$dipath"/usr/share/rpikernelhack/ | |
| cp "$workdir"/rpi-firmware/kernel8.img "$dipath"/usr/share/rpikernelhack/vmlinuz-"$l" | |
| mkdir -p "$dipath"/lib/modules/ | |
| cp -r "$workdir"/rpi-firmware/modules/"$l" "$dipath"/lib/modules/ | |
| mkdir -p "$dipath"/usr/lib/linux-image-"$l"/broadcom && mkdir -p "$dipath"/usr/lib/linux-image-"$l"/overlays | |
| cp -f "$workdir"/rpi-firmware/*.dtb "$dipath"/usr/lib/linux-image-"$l"/broadcom/ | |
| cp -f "$workdir"/rpi-firmware/overlays/* "$dipath"/usr/lib/linux-image-"$l"/overlays/ | |
| [[ ! -e "$dipath/lib/firmware/$l/device-tree" ]] && mkdir -p "$dipath"/lib/firmware/"$l"/device-tree | |
| make_image_deb_files | |
| # Clean up. | |
| cd "$workdir" | |
| sudo rm -rf "$src_temp" | |
| sudo rm -rf "$tmpdir" | |
| } | |
| install_headers() { | |
| if [[ $(uname -m) == "aarch64" ]]; then | |
| bootfsmount=$(mount | grep boot | awk '{print $3}') | |
| [[ $(echo $bootfsmount | wc -w) == "1" ]] && BOOTFS=${bootfsmount} | |
| BOOTFS=${BOOTFS:-/boot} | |
| sudo mount -o remount,rw $BOOTFS | |
| fi | |
| sudo nice -n 20 dpkg -i "$workdir"/build/linux-headers-"${kver}"*.deb || sudo apt install -f -y | |
| } | |
| install_image() { | |
| if [[ $(uname -m) == "aarch64" ]]; then | |
| bootfsmount=$(mount | grep boot | awk '{print $3}') | |
| [[ $(echo $bootfsmount | wc -w) == "1" ]] && BOOTFS=${bootfsmount} | |
| BOOTFS=${BOOTFS:-/boot} | |
| sudo mount -o remount,rw $BOOTFS | |
| fi | |
| sudo nice -n 20 dpkg -i "$workdir"/build/linux-image-"${kver}"*.deb || sudo apt install -f -y | |
| } | |
| update_git_fw | |
| make_debs | |
| mkdir -p "$workdir"/kernel-test | |
| cp "$workdir"/build/linux-image-"${kver}"*.deb "$workdir"/kernel-test/ | |
| cp "$workdir"/build/linux-headers-"${kver}"*.deb "$workdir"/kernel-test/ | |
| install_headers | |
| install_image | |
| #sudo flash-image --force ${kver} | |
| #trap '' HUP | |
| #if [[ $(uname -m) == "aarch64" ]]; then | |
| #bootfsmount=$(mount | grep boot | awk '{print $3}') | |
| #[[ $(echo $bootfsmount | wc -w) == "1" ]] && BOOTFS=${bootfsmount} | |
| #BOOTFS=${BOOTFS:-/boot} | |
| #sudo mount -o remount,rw $BOOTFS | |
| #fi | |
| #mkdir "$workdir"/bin | |
| #curl -Lf https://github.com/raspberrypi/rpi-update/raw/master/rpi-update -o "$workdir"/bin/rpi-update && chmod +x "$workdir"/bin/rpi-update | |
| #sudo touch $BOOTFS/kernel7l.img && sudo WANT_32BIT=0 WANT_64BIT=1 WANT_PI4=1 SKIP_WARNING=1 BOOT_PATH=$BOOTFS ROOT_PATH=/ BRANCH=master "$workdir"/bin/rpi-update | |
| echo "done." |
@satmandu Would you script be okay to generate the image/headers/tools etc for use in a Ubuntu aarch64 20.04 build running on a Pi4? I've been keeping a look out for a 5.15 kernel to come to 20.04 aarch64 like how it's coming to the x86_64 version, but so far all I see is 5.4
I installed a 5.15 kernel from Ubuntu 22.04 aarch64 for testing, which is fine, but the headers/tools can't be installed to do a dependency being to low a version in 20.04.
I have your script running now, so I guess I'll see what happens. I'm not sure how different a Pi OS Kernel vs a Ubuntu aarch64 kernel.
edit: I think I answered my own question as the script doesn't appear to work. It states the following "Ignoring old or unknown version 5.15.43-v8+ (latest is 5.15.0-1008-raspi)" towards the end.
Here is the current version I use with Ubuntu 22.04:
@alphafox02 I updated the script to the version I use for generating kernels for Ubuntu 22.04.
I’ll check it out here shortly. I’m super curious to see if it’ll work on 20.04 Ubuntu aarch64. Thank you for sharing.
@satmandu both the kernel and headers built and installed and no immediate problem booting. Should I be looking for a way to build the Linux-modules/Linux/modules-extra and Linux-raspi-tools/Linux-tools that typically accompany the kernel and header install on the Pi w/ aarch64 20.04?
@alphafox02 I have never bothered with those packages.
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Here is my current version, which builds the 5.15 kernel images...