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tools/buildroot: Add support for generating Linux target system images

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Integrate buildroot into devlib in order to ease building kernel and
root filesystem images via 'generate-kernel-initrd.sh' helper script.

As its name suggests, the script builds kernel image which also includes
an initial RAM disk per default config files located under
configs/<arch>/.

Provide config files for buildroot and Linux kernel as well as a
post-build.sh script which tweaks (e.g., allowing root login on SSH)
target's root filesystem.

doc/tools.rst talks about details of kernel and rootfs configuration.

Signed-off-by: Metin Kaya <metin.kaya@arm.com>
This commit is contained in:
Metin Kaya
2024-01-19 16:15:14 +00:00
committed by Marc Bonnici
parent dd84dc7e38
commit 1431bebd80
9 changed files with 279 additions and 0 deletions
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17
tools/buildroot/configs/aarch64/arm-power_aarch64_defconfig Normal file
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BR2_aarch64=y
BR2_cortex_a73_a53=y
BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV=y
BR2_TARGET_GENERIC_ROOT_PASSWD="root"
BR2_SYSTEM_DHCP="eth0"
BR2_ROOTFS_POST_BUILD_SCRIPT="board/arm-power/post-build.sh"
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/arm-power/aarch64/linux.config"
BR2_LINUX_KERNEL_XZ=y
BR2_PACKAGE_OPENSSH=y
# BR2_PACKAGE_OPENSSH_SANDBOX is not set
BR2_PACKAGE_UTIL_LINUX=y
BR2_PACKAGE_UTIL_LINUX_BINARIES=y
BR2_TARGET_ROOTFS_CPIO_XZ=y
BR2_TARGET_ROOTFS_INITRAMFS=y
# BR2_TARGET_ROOTFS_TAR is not set

36
tools/buildroot/configs/aarch64/linux.config Normal file
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CONFIG_SCHED_MC=y
CONFIG_UCLAMP_TASK=y
CONFIG_SCHED_SMT=y
CONFIG_KERNEL_XZ=y
CONFIG_SYSVIPC=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_CGROUPS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE="${BR_BINARIES_DIR}/rootfs.cpio"
# CONFIG_RD_GZIP is not set
# CONFIG_RD_BZIP2 is not set
# CONFIG_RD_LZMA is not set
# CONFIG_RD_LZO is not set
# CONFIG_RD_LZ4 is not set
# CONFIG_RD_ZSTD is not set
CONFIG_SMP=y
# CONFIG_GCC_PLUGINS is not set
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_INET=y
CONFIG_PCI=y
CONFIG_PCI_HOST_GENERIC=y
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
CONFIG_NETDEVICES=y
CONFIG_VIRTIO_NET=y
CONFIG_INPUT_EVDEV=y
CONFIG_SERIAL_AMBA_PL011=y
CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
CONFIG_VIRTIO_CONSOLE=y
CONFIG_VIRTIO_PCI=y
CONFIG_TMPFS=y