/usr/bin/qemu-system-riscv64 qemu spike_v1.10 riscv64 /usr/share/OVMF/OVMF_CODE.fd /usr/share/OVMF/OVMF_CODE.secboot.fd rom pflash yes no disk cdrom floppy lun fdc scsi virtio usb sata virtio virtio-transitional virtio-non-transitional sdl vnc spice subsystem default mandatory requisite optional usb pci scsi