I add a qemu-cmd hook to localhost.
"-device usb-host:vendorid=0718,productid=0083"
And in the qemu/usb-test.log I find
"....
Domain id=6 is tainted: custom-argv
husb: open device 2.7
/dev/bus/usb/002/007: Operation not permitted
husb: open device 2.7
/dev/bus/usb/002/007: Operation not permitted
husb: open device 2.7
/dev/bus/usb/002/007: Operation not permitted
qemu: terminating on signal 15 from pid 3534
2013-10-31 05:48:36.483+0000: shutting down"