[libvirt-users] USB passthrough: flexible configuration in XML-file needed

eGerlach egerlach at aiai.de
Thu May 3 14:15:29 UTC 2012


I need a flexible USB passthrough of a USB-device. If the device is turned off
by the current switch (230Volt) the VM should start and not claim that the 
USB device is left. 


    <hostdev mode='subsystem' type='usb'>
        <vendor id='0x152a'/>
        <product id='0x8180'/>

in libvirt XML-config file the boot process is stopped if the device is switched 
off. How can I configure the xml-file to make ich more flexible? 

Another possibility would be to passthrough USB-Slot No1 (or No 2, ...) to 
the VM. So an arbitrary USB-device that is plugged in to USB-Slot1 
would be recognized by the VM. In another forum I got the hint to 
start the VM by: 

-usb -usbdevice host:0.* -usbdevice host:1.* 

to passthrough USB-Slot No1 and No 2. How can I configure that in libvirt 


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