/usr/bin/qemu-system-ppc64 kvm pseries-2.6 ppc64le /usr/share/AAVMF/AAVMF_CODE.fd /usr/share/OVMF/OVMF_CODE.fd rom pflash yes no POWER8 POWER8 POWER7 disk cdrom lun ide scsi virtio usb sdl vnc subsystem default mandatory requisite optional usb pci scsi default kvm vfio