USB Physical Port Mapping

Currently (Stable version of Proxmox is 1.9) it's possible to map hardware usb port in a following way:

1. Find out physical port parameters (bus and port)

 qm monitor NNN
 qm> info usbhost
   Bus 3, Addr 2, Port 1, Speed 1.5 Mb/s
     Vendor Specific: USB device 0529:0001, HASP 2.17
   Bus 5, Addr 3, Port 2, Speed 12 Mb/s
     Class 00: USB device 0624:0248, USB Composite Device-0

2. Add the device to the particular VM (/etc/qemu-server/NNN.conf)

 args: -device usb-host,hostbus=3,hostport=1

or (as Proxmox 2.x supports usbN in vm.conf)

 usb0: host=3-1

3. Power off/power on VM and check

 qm monitor NNN
 qm> info usb
   Device 0.2, Port 1, Speed 12 Mb/s, Product QEMU USB Tablet
   Device 0.3, Port 2, Speed 12 Mb/s, Product QEMU USB Hub
   Device 0.4, Port 2.1, Speed 1.5 Mb/s, Product HASP 2.17

More information:

1. man vm.conf
2. http://www.kraxel.org/cgit/qemu/tree/docs/usb2.txt