[fedora-virt] Re: <Hostdevice> parameters

[Daniel P. Berrange]

On Wed, Oct 07, 2009 at 01:17:06PM +0200, Andr?s Garc?a wrote:
> 
> >
> ><hostdev mode='subsystem' type='sub'>
> ><source>
> ><address bus='0x06' slot='0x02' function='0x0'/>
> ></source>
> ></hostdev>
> >
> >'bus' and 'slot' I can get with 'lsusb', but what does 'function' mean?
> >
> >
> >
> Looking it up in the libvirt sources, it appears to be used only for pci 
> devices.

For USB passthrough, you want 

  <hostdev mode='subsystem' type='usb'>
    <source>
      <address bus='0x01' device='0x02' />
    </source>
  </hostdev>


The bus/slot/domain/function  style is for PCI device addressing.

Daniel
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