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Qemu Aarch64 virt

1) Download build and install Aarch64 qemu

NOTE

If you already have qemu-system-aarch64 installed or you don't want to compile it but install it directly using a package manager or some other method, please make sure you are using version 7.2.0 or higher. If so, you can skip this step.

export BAO_DEMOS_QEMU=$BAO_DEMOS_WRKDIR_SRC/qemu-$ARCH
git clone https://github.com/qemu/qemu.git $BAO_DEMOS_QEMU --depth 1\
   --branch v7.2.0
cd $BAO_DEMOS_QEMU
./configure --target-list=aarch64-softmmu --enable-slirp
make -j$(nproc)
sudo make install

2) Build U-boot

export BAO_DEMOS_UBOOT=$BAO_DEMOS_WRKDIR_SRC/u-boot
git clone https://github.com/u-boot/u-boot.git $BAO_DEMOS_UBOOT --depth 1\
   --branch v2022.10
cd $BAO_DEMOS_UBOOT
make qemu_arm64_defconfig

Now you need to set the Kconfig options:

  • CONFIG_TFABOOT=y
  • CONFIG_SYS_TEXT_BASE=0x60000000

You can do it via using an interface such as menuconfig or just write them directly to the config file:

echo "CONFIG_TFABOOT=y" >> .config
echo "CONFIG_SYS_TEXT_BASE=0x60000000" >> .config

Then build it:

make -j$(nproc)

And copy the image to the platform's working directory:

cp $BAO_DEMOS_UBOOT/u-boot.bin $BAO_DEMOS_WRKDIR/imgs/$PLATFORM

3) Build TF-A

export BAO_DEMOS_ATF=$BAO_DEMOS_WRKDIR_SRC/arm-trusted-firmware
git clone https://github.com/bao-project/arm-trusted-firmware.git\
   $BAO_DEMOS_ATF --branch bao/demo --depth 1
cd $BAO_DEMOS_ATF
make PLAT=qemu bl1 fip BL33=$BAO_DEMOS_WRKDIR/imgs/$PLATFORM/u-boot.bin\
   QEMU_USE_GIC_DRIVER=QEMU_GICV3
dd if=$BAO_DEMOS_ATF/build/qemu/release/bl1.bin\
   of=$BAO_DEMOS_WRKDIR/imgs/$PLATFORM/flash.bin
dd if=$BAO_DEMOS_ATF/build/qemu/release/fip.bin\
   of=$BAO_DEMOS_WRKDIR/imgs/$PLATFORM/flash.bin seek=64 bs=4096 conv=notrunc

4) Run QEMU

qemu-system-aarch64 -nographic\
   -M virt,secure=on,virtualization=on,gic-version=3 \
   -cpu cortex-a53 -smp 4 -m 4G\
   -bios $BAO_DEMOS_WRKDIR/imgs/$PLATFORM/flash.bin \
   -device loader,file="$BAO_DEMOS_WRKDIR_IMGS/bao.bin",addr=0x50000000,force-raw=on\
   -device virtio-net-device,netdev=net0\
   -netdev user,id=net0,net=192.168.42.0/24,hostfwd=tcp:127.0.0.1:5555-:22\
   -device virtio-serial-device -chardev pty,id=serial3 -device virtconsole,chardev=serial3

You should see TF-A and U-boot initialization messages.

5) Setup connections and jump to Bao

Qemu will let you know in which pseudo-terminals it placed the virtio serial. For example:

char device redirected to /dev/pts/4 (label serial3)

If you are running more than one guest, open a new terminal and connect to it. For example:

screen /dev/pts/4

If you are running a Linux guest you can also connect via ssh to it by opening a new terminal and running:

ssh root@localhost -p 5555

Finally, make u-boot jump to where the bao image was loaded:

go 0x50000000

When you want to leave QEMU press Ctrl-a then x.