I just today merged[1] initial support for android boot in the sample images. This is still somewhat experimental, but allows some level of support for aboot.

The support has multiple parts: * The abootimg rpm has an app that can create aboot images. * The aboot-update rpm has integration between the kernel and aboot. It looks at the /boot/aboot.cfg file for aboot options and applies them for a kernel version producing a file /boot/aboot-${kernel_version}.img. It also hooks into the kernel rpms to run automatically when a new kernel is installed. * The osbuild-aboot rpm, which must be installed on the build host, adds some new osbuild stages that use aboot-update. (This is in a separate copr) * A new "abootqemu" target which is similar to the existing "qemu" target, but using aboot instead of grub/efi. * Support in runvm for --aboot, which uses a custom bios that supports aboot. This allows testing of the aboot-based boot. (Only on aarch64 atm.)

A full example of testing this:

$ sudo dnf copr enable alexl/osbuild-aboot $ sudo dnf install osbuild-aboot $ make cs9-abootqemu-minimal-regular.aarch64.qcow2 $ make qemu-u-boot-aarch64.bin $ ./runvm --aboot --arch aarch64 cs9-abootqemu-minimal-regular.aarch64.qcow2

The qemu boot output:

U-Boot 2022.07 (Aug 26 2022 - 00:00:00 +0000) [...] Device 0: 1af4 VirtIO Block Device Type: Hard Disk Capacity: 8192.0 MB = 8.0 GB (16777216 x 512) ... is now current device Found Android Boot Image

virtio read: device 0 block # 2048, count 131072 ... 131072 blocks read: OK Kernel load addr 0x50000000 size 10232 KiB Kernel command line: root=UUID=76a22bf4-f153-4541-b6c7-0332c0dfaeac ro loglevel=4 efi=runtime console=ttyAMA0 RAM disk load addr 0x11000000 size 25563 KiB Uncompressing Kernel Image Loading Ramdisk to fe709000, end fffff8c6 ... OK Loading Device Tree to 00000000fe606000, end 00000000fe708fff ... OK

Starting kernel ...

[ 0.000000] ACPI: Failed to init ACPI tables

Welcome to CentOS Stream 9 dracut-057-13.git20220816.el9 (Initramfs)! [...]

[1] https://gitlab.com/CentOS/automotive/sample-images/-/merge_requests/116