On 05/18/2012 06:04 AM, eGerlach wrote:> Hi,
>
> how can I define passthrough of all USB-slots to a guest with libvirt?
>
> With qemu it's very easy:
>
> # kvm -usb -usbdevice host:0.* -usbdevice host:1.* -usbdevice host:2.*
-usbdevice host:3.* ...
>
> This configuration of the VM gets *all* 4 USB-Slots. Every time somewhat
USB-device
> is plugged in the VM gets it.
>
> virt-install manpage offers:
>
> --host-device 001.003
> USB by bus, device (via lsusb).
>
> I installed a VM with option --host-device 001.001 according to output of
lsusb.
> The XML-file generated:
>
> <hostdev mode='subsystem' type='usb'
managed='yes'>
> <source>
> <vendor id='0x1d6b'/>
> <product id='0x0002'/>
> </source>
> </hostdev>
You also may use bus + device to define the above XML, and just need to
replace <vendor..../>
and <product.../> lines with <address bus='XX'
device='XX'/> line.> But no USB device is passed through automatically. I always need
>
> virsh attach-device virtualM myusb.xml
If you only wirte a myusb.xml rather than running above operation, you
can't expect a usb device is assigned to guest, the above method belongs
to hot-plugging, the guest must be running status. if
your guest is inactive, you can use 'virsh edit' to append the above
<hostdev...>...</hostdev> into
guest XML configuration then 'virsh start' the guest, the usb device
will be assigned to the guest, it
belongs to cold-plugging.> with exact vendor and product ID. I want to plug in somewhat USB-Stick or
other USB stuff
> without exploring vendor and product id before.
I haven't exactly know your mean, as usual, you need to use 'lsusb'
or
'virsh nodedev-list --tree' and 'virsh nodedev-dumpxml XXX' to
get usb's
bus+device or vendor+product information.> Who can help?
>
> tia
> Ekkard
>
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