starting qemu for building and running

start_vm.sh

#!/bin/bash -e

NPROC=4
SOURCE=$(dirname -- $( readlink -f -- $0 ))
DISK=ubuntu.qcow2
cp $(dirname $(which qemu-img))/../share/qemu/edk2-aarch64-code.fd $SOURCE
cp $(dirname $(which qemu-img))/../share/qemu/edk2-arm-vars.fd $SOURCE

if [ "$1" == "build" ]
then
qemu-system-aarch64 \
  -machine virt,accel=hvf,highmem=on \
  -cpu host -m 7G \
  -smp $NPROC \
  -display cocoa \
  -drive "if=pflash,format=raw,file=$SOURCE/edk2-aarch64-code.fd,readonly=on" \
  -drive "if=pflash,format=raw,file=$SOURCE/edk2-arm-vars.fd,discard=on" \
  -drive "if=virtio,media=disk,id=drive2,file=$SOURCE/$DISK,cache=writethrough,format=qcow2" \
  -device e1000,netdev=net0 \
  -netdev user,id=net0 \
  -netdev user,id=net1 \
  -device virtio-net-pci,netdev=net1 \
  -device virtio-gpu-pci \
  -device virtio-keyboard-pci \
  -device virtio-mouse-pci \
  -cdrom $SOURCE/$2 \
  -boot d

else
tmux new-session -d -s qemu "qemu-system-aarch64 \
  -smp $NPROC \
  -machine virt,accel=hvf,highmem=on \
  -cpu host -m 7G \
  -drive 'if=pflash,format=raw,file=$SOURCE/edk2-aarch64-code.fd,readonly=on' \
  -drive 'if=pflash,format=raw,file=$SOURCE/edk2-arm-vars.fd,discard=on' \
  -drive 'if=virtio,media=disk,id=drive2,file=$SOURCE/$DISK,cache=writethrough,format=qcow2' \
  -device e1000,netdev=net0 \
  -netdev user,id=net0,hostfwd=tcp::5555-:22,hostfwd=tcp::5902-:5902 \
  -nographic"
fi