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Flash TRS images on Rockpi4b platform

We need to copy TRS wic image trs-image-trs-qemuarm64.wic on AVA with Ubuntu system, then we can execuate below shell script to flash TRS images onto a USB disk with command ./flash_ewaol_image.sh /dev/nvmeXnY (you might need to change the nvme block device name nvmeXnY based on your local environment).

Below is the source code for flash_ewaol_image.sh. Note, the script executes commands e2fsck and resize2fs to enlarge the partition size, when you use older version’s binary for e2fsck and resize2fs, it will fail and report errors. In this case, you need to download e2fsprogs package (version 1.47.0 is verified) and build these two binaries.

sudo dd if=deploy-trs-qemuarm64/trs-image-trs-qemuarm64.rootfs-20231030085931.wic of=/dev/<usb dev>  bs=8M conv=fdatasync,notrunc

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By following up the steps described in Xen: porting Android Cuttlefish on Xen Virtual Machine, we can get the Android Cuttlefish images, then we need to copy the U-boot binary and Cuttlefish images into to /home/leoy of USB-disk on PC. You Then you can increase the 2nd partition of USB-disk and create /home/leoy to hold android images as page Xen: maintenance Xen and QEMU repos for TRS https://linaro.atlassian.net/wiki/spaces/AUT/pages/28960981135/Xen+maintenance+Xen+and+QEMU+repos+for+TRS#Flash-TRS-images-on-AVA-platform . Or create the 3rd partition and copy the android images into it, you need to mount it to /home/leoy Then we can use on rockpi4b in runtime in this way.

With below Xen configuration file to saved on rockpi4b, you can launch Xen virtual machine with command xl -vvv create aaos_vm.cfg -c:

# Copyright (c) 2022, Arm Limited.
#
# SPDX-License-Identifier: MIT

name = "aaos-vm"
memory = 2048
vcpus = 4
extra = " earlyprintk=xenboot console=hvc0 rw androidboot.console=hvc0 androidboot.serialconsole=1"
root = "/dev/xvda2"
kernel = "/home/leoy/u-boot.bin"
disk = ['format=qcow2, vdev=xvda, access=rw, target=/home/leoy/android-cf-mainline/cf/cuttlefish/instances/cvd-1/overlay.img', 'format=raw, vdev=xvdb, access
=rw, target=/home/leoy/android-cf-mainline/cf/cuttlefish/instances/cvd-1/persistent_composite.img', 'format=raw, vdev=xvdc, access=rw, target=/home/leoy/andr
oid-cf-mainline/cf/cuttlefish/instances/cvd-1/sdcard.img']
vif = ['mac=00:16:3E:74:34:32', 'mac=00:16:3e:5f:48:e4', 'mac=00:16:3E:74:34:32,script=vif-bridge,bridge=xenbr0']
virtio = ['transport=pci, backend_type=qemu, bdf=00:00.0']

Issues on rockpi4b

• The USB disk read speed in U-boot is very slow. It takes about 2 or 3 minutes to load Linux and ramfs binary.

• The CPU/memory performance in Dom0 and DomU is only about 1/3 of native Linux. It takes about 1 hour to run into Android UI.