CENTOS_IMG=http://mirror.centos.org/altarch/7/isos/aarch64/CentOS-7-aarch64.img.xz
BIOS=http://snapshots.linaro.org/components/kernel/leg-virt-tianocore-edk2-upstream/latest/QEMU-AARCH64/RELEASE_GCC49/QEMU_EFI.fd
QEMU_BRANCH=v2.4.0.1

CURDIR=`pwd`

sudo apt-get update
sudo apt-get install -y git wget build-essential qemu
sudo apt-get build-dep -y qemu

sudo rm -rf qemu-${QEMU_BRANCH}
git clone --depth=1 git://git.qemu.org/qemu.git -b ${QEMU_BRANCH} qemu-${QEMU_BRANCH}
mkdir qemu-${QEMU_BRANCH}/build
cd qemu-${QEMU_BRANCH}/build
../configure --prefix=/usr --target-list=aarch64-softmmu --enable-virtfs --enable-kvm
sudo make -j $(nproc) install
cd ${CURDIR}
sudo rm -rf qemu-${QEMU_BRANCH}

wget ${BIOS}

wget --output-document=centos7.img.xz ${CENTOS_IMG}
xz -d *.xz

cat <<'EOF' >> ./start
sudo qemu-system-aarch64 \
     -m 4096 \
     -cpu host \
     -enable-kvm -M virt \
     -bios QEMU_EFI.fd \
     -nographic \
     -drive if=none,file=centos7.img,id=hd0 \
     -device virtio-blk-device,drive=hd0 \
     -netdev user,id=mynet0,net=192.168.76.0/24,dhcpstart=192.168.76.9 \
     -device virtio-net-device,netdev=mynet0
EOF

chmod +x ./start

echo "run ./start to start the VM"