Generated with:

qemu-system-x86_64 -help >tests/qemuhelpdata/qemu-1.2.0
qemu-system-x86_64 \
    -device ? \
    -device pci-assign,? \
    -device virtio-blk-pci,? \
    -device virtio-net-pci,? \
    -device scsi-disk,? 2>tests/qemuhelpdata/qemu-1.2.0-device