diff -r 06d98ed0b6e5 -r 6d808778065c tools/examples/Makefile
--- a/tools/examples/Makefile	Mon Nov 21 11:10:40 2005
+++ b/tools/examples/Makefile	Mon Nov 21 11:11:06 2005
@@ -26,6 +26,7 @@
 XEN_SCRIPTS += network-nat vif-nat
 XEN_SCRIPTS += block
 XEN_SCRIPTS += block-enbd block-nbd
+XEN_SCRIPTS += usb
 XEN_SCRIPT_DATA = xen-script-common.sh
 XEN_SCRIPT_DATA += xen-hotplug-common.sh xen-network-common.sh vif-common.sh
 XEN_SCRIPT_DATA += block-common.sh
diff -r 06d98ed0b6e5 -r 6d808778065c tools/examples/xen-backend.agent
--- a/tools/examples/xen-backend.agent	Mon Nov 21 11:10:40 2005
+++ b/tools/examples/xen-backend.agent	Mon Nov 21 11:11:06 2005
@@ -3,6 +3,9 @@
 PATH=/etc/xen/scripts:$PATH
 
 case "$XENBUS_TYPE" in
+  usb)
+    /etc/xen/scripts/usb "$ACTION"
+    ;;
   vbd)
     /etc/xen/scripts/block "$ACTION"
     ;;
diff -r 06d98ed0b6e5 -r 6d808778065c tools/python/xen/xend/server/usbif.py
--- a/tools/python/xen/xend/server/usbif.py	Mon Nov 21 11:10:40 2005
+++ b/tools/python/xen/xend/server/usbif.py	Mon Nov 21 11:11:06 2005
@@ -22,8 +22,9 @@
 """Support for virtual USB hubs.
 """
 
+from xen.xend import sxp
+
 from xen.xend.server.DevController import DevController
-
 
 class UsbifController(DevController):
     """USB device interface controller. Handles all USB devices
@@ -35,8 +36,16 @@
         """
         DevController.__init__(self, vm)
 
-
-    def getDeviceDetails(self, _):
+    def getDeviceDetails(self, config):
         """@see DevController.getDeviceDetails"""
 
-        return (self.allocateDeviceID(), {}, {})
+        path = sxp.child_value(config, 'path')
+
+        devid = self.allocateDeviceID()
+
+        back  = { 'path'   : path,
+                  'handle' : "%i" % devid }
+
+        front = { 'handle' : "%i" % devid }
+
+        return (devid, back, front)
diff -r 06d98ed0b6e5 -r 6d808778065c tools/python/xen/xm/create.py
--- a/tools/python/xen/xm/create.py	Mon Nov 21 11:10:40 2005
+++ b/tools/python/xen/xm/create.py	Mon Nov 21 11:11:06 2005
@@ -220,6 +220,10 @@
           fn=set_bool, default=0,
           use="Make the domain a network interface backend.")
 
+gopts.var('usbif', val='no|yes',
+          fn=set_bool, default=0,
+          use="Make the domain a USB device backend.")
+
 gopts.var('tpmif', val='frontend=DOM',
           fn=append_value, default=[],
           use="""Make the domain a TPM interface backend. If frontend is given,
@@ -246,10 +250,13 @@
          For example '-ioports 02f8-02ff'.
          The option may be repeated to add more than one i/o range.""")
 
-gopts.var('usb', val='PATH',
+gopts.var('usb', val="path=PATH,backend=DOM",
           fn=append_value, default=[],
-          use="""Add a physical USB port to a domain, as specified by the path
-          to that port.  This option may be repeated to add more than one port.""")
+          use="""Map a backend USB port (specified by the backend PATH in the
+          backend domain DOM) to a single-port virtual host controller device
+          in the domain.
+          If backend is not specified the default backend driver domain is
+          used.  This option may be repeated to add more than one port.""")
 
 gopts.var('ipaddr', val="IPADDR",
           fn=append_value, default=[],
@@ -449,8 +456,13 @@
         config_devs.append(['device', config_ioports])
 
 def configure_usb(config_devs, vals):
-    for path in vals.usb:
-        config_usb = ['usb', ['path', path]]
+    for d in vals.usb:
+        path    = d.get('path')
+        backend = d.get('backend')
+        config_usb = ['usb']
+        config_usb.append(['path', path])
+        if backend:
+            config_usb.append(['backend', backend])
         config_devs.append(['device', config_usb])
 
 def configure_vtpm(config_devs, vals):
@@ -590,6 +602,8 @@
         config.append(['backend', ['blkif']])
     if vals.netif:
         config.append(['backend', ['netif']])
+    if vals.usbif:
+        config.append(['backend', ['usbif']])
     if vals.tpmif:
         config.append(['backend', ['tpmif']])
 
@@ -669,6 +683,22 @@
         vifs.append(d)
     vals.vif = vifs
 
+def preprocess_usb(vals):
+    if not vals.usb: return
+    usb = []
+    for port in vals.usb:
+        d = {}
+        a = port.split(',')
+        for b in a:
+            (k, v) = b.strip().split('=', 1)
+            k = k.strip()
+            v = v.strip()
+            if k not in ['path', 'backend']:
+                err('Invalid usb port specifier: ' + port)
+            d[k] = v
+        usb.append(d)
+    vals.usb = usb
+
 def preprocess_vtpm(vals):
     if not vals.vtpm: return
     vtpms = []
@@ -789,6 +819,7 @@
     preprocess_vifs(vals)
     preprocess_ip(vals)
     preprocess_nfs(vals)
+    preprocess_usb(vals)
     preprocess_vnc(vals)
     preprocess_vtpm(vals)
     preprocess_tpmif(vals)
diff -r 06d98ed0b6e5 -r 6d808778065c tools/examples/usb
--- /dev/null	Mon Nov 21 11:10:40 2005
+++ b/tools/examples/usb	Mon Nov 21 11:11:06 2005
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+dir=$(dirname "$0")
+. "$dir/xen-hotplug-common.sh"
+
+success