0.0.1 isa pci usb xen ps2 audio block console chipset controller.usb filesystem input memory.balloon net video watchdog rng all aarch64 alpha armv7l cris i686 ia64 lm32 m68k microblaze microblazeel mips mipsel mips64 mips64el openrisc parisc parisc64 ppc ppc64 ppc64le ppcemb s390 s390x sh4 sh4eb sparc sparc64 unicore32 x86_64 xtensa xtensaeb qcow2 raw vhdx vmdk [0-9]{4}-[0-9]{2}-[0-9]{2} [0-9a-fA-F]+ [a-zA-Z]+ true|false [0-9]+ \w+://.* required|optional dos|unix strict|warn|none snapshot|prerelease|released|rolling cdrom|disk|floppy|initrd|web bios efi