qemu-system-riscv64 `
  -nographic -machine virt `
  -smp 8 -m 16G `
  -display sdl `
  -kernel "fw_payload_oe_qemuvirt.elf" `
  -bios none `
  -drive file=openEuler-22.03-V2-xfce-qemu-preview.qcow2,format=qcow2,id=hd0 `
  -device virtio-vga `
  -device virtio-blk-device,drive=hd0 `
  -device virtio-net-device,netdev=usernet `
  -netdev user,id=usernet,hostfwd=tcp::12056-:22 `
  -device qemu-xhci -usb -device usb-kbd -device usb-tablet `
  -append 'root=/dev/vda1 rw console=ttyS0 swiotlb=1 loglevel=3 systemd.default_timeout_start_sec=600 selinux=0 highres=off mem=16384M earlycon'