Abstract

This documentation describes how to use the primitive commands for generating Android images and running on Cuttlefish emulated platform. And then we can see how to boot Android Automotive OS on Xen virtual machine with QEMU command.

What’s Cuttlefish flow?

Cuttlefish allows user to use command line interface (CLI) to launch Android images on Cuttlefish virtual platform, it provides the command launch_cvd for this purpose.

There have two prerequisites for using the launch_cvd: the Cuttlefish package which contains binaries and utilites and Android image package. We can download the Android prebuilt packages for Arm64 via http://ci.android.com/, then search the branch aosp-main-throttled and select the device target aosp_cf_arm64_only_phone-trunk_staging-userdebug . After downloading and uncompress the packages, we can use the launch_cvd command to boot up Android on Cuttlefish:

$ HOME=$PWD ./bin/launch_cvd

The launch_cvd command rus two commands assemble_cvd and run_cvd in its child processes. If both commands work as expected, the Android can launch successfully on Cuttlefish machine. The assemble_cvd command generates root file system images with qcow2 overlay format, then the run_cvd command invokes the virtual machine manager (either Crosvm or QEMU) to boot the generated images on virtual machine. The diagram below shows the Cuttlefish flow.