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AOSP on NVIDIA Jetson Nano

Antmicro Jetson Nano Baseboard running AOSP

This README contains build instructions for creating an AOSP image intended to be run on the Nvidia Jetson Nano platform. Preparing a BSP for running this image on Antmicro's Jetson Nano Baseboard is described in a separate guide.

Build instructions - AOSP image

The following instructions are targeted for a Debian 10 system; the package installation process needs to be adjusted to your specific distribution.

  1. Install required dependencies
sudo apt-get install git git-core build-essential bc wget xxd python python3 locales-all curl ninja-build procps unzip m4 libncurses5 rsync
  1. Fetch and install the repo tool
mkdir -p ~/bin
PATH=~/bin:$PATH
curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
chmod a+x ~/bin/repo
  1. Fetch the AOSP sources
mkdir aosp
cd aosp
repo init -u https://github.com/antmicro/kvm-aosp-manifest.git -b kvm-aosp
repo sync
  1. Configure and build the AOSP image
source build/envsetup.sh
lunch aosp_arm64-eng
m
  1. Create RW images for the system and vendor partitions

By default the system and vendor images use the ext4 filesystem with a feature called EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS, which makes it impossible to mount with write permissions. SELinux needs write access to those partitions during boot, so they need to be recreated to allow it.

mkdir {system,vendor}-r{o,w}
dd if=/dev/zero of=system-rw.img bs=512 count=6291456
mkfs.ext4 system-rw.img -L "/"
sudo mount system-rw.img system-rw
sudo mount out/target/product/generic_arm64/system.img system-ro -o ro
sudo rsync -avxHAX system-r{o,w}/
sudo umount system-r{o,w}
mv system-rw.img out/target/product/generic_arm64/system.img

dd if=/dev/zero of=vendor-rw.img bs=512 count=1048576
mkfs.ext4 vendor-rw.img -L "vendor"
mount vendor-rw.img vendor-rw
mount out/target/product/generic_arm64/vendor.img vendor-ro -o ro
rsync -avxHAX vendor-r{o,w}/
sudo umount vendor-r{o,w}
mv vendor-rw.img out/target/product/generic_arm64/vendor.img

Output files

The output of the AOSP build are partition images. The resulting files required to run the system are:

out/target/product/generic_arm64/vendor.img
out/target/product/generic_arm64/system.img
out/target/product/generic_arm64/userdata.img
out/target/product/generic_arm64/ramdisk.img

Build instructions - AOSP kernel

  1. Fetch the kernel sources
mkdir aosp_kernel
cd aosp_kernel
repo init -u https://android.googlesource.com/kernel/manifest -b q-common-android-4.14
repo sync
  1. Configure and build the kernel
BUILD_CONFIG=./common/build.config.cuttlefish.aarch64 ./build/build.sh

Output files

The resulting file needed to run the system is the kernel image, located here:

out/android-4.14-q/common/arch/arm64/boot/Image

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