Re: [libvirt-users] USB passthrough of all USB-slots to guest
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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