[rhelv6-list] Does usb passthrogh really works with rhel6 kvm??

[Greg Cockburn]

> -----Original Message-----
> From: rhelv6-list-bounces at redhat.com [mailto:rhelv6-list-
> bounces at redhat.com] On Behalf Of carlopmart
> Sent: Thursday, 19 May 2011 12:11 AM
> To: rhelv6-list at redhat.com
> Subject: Re: [rhelv6-list] Does usb passthrogh really works with rhel6
> kvm??
> 
> On 05/18/2011 03:22 PM, carlopmart wrote:
> > Hi all,
> >
> > I have installed a windows 7 sp1 guest under a rhel6 kvm host. I am
> > trying to pass to this guest an usb printer without luck.
> >
> > My guest.xml is:
> >
> > <hostdev mode='subsystem' type='usb' managed='yes'>
> > <source>
> > <vendor id='0x03f0'/>
> > <product id='0x5611'/>
> > <address bus='2' device='3'/>
> > </source>
> > <alias name='hostdev0'/>
> > </hostdev>
> > <hostdev mode='subsystem' type='usb' managed='yes'>
> > <source>
> > <vendor id='0x05ac'/>
> > <product id='0x1265'/>
> > <address bus='2' device='4'/>
> > </source>
> > <alias name='hostdev1'/>
> > </hostdev>
> >
> > and I have removed usb_storage and uslp modules with rmmod, but
guest
> > can't see this usb printer yet. Do I need to do something else??
> >
> > Thanks.
> 
> More info. When guest starts, returns this error:
> 
> husb: open device 1.2
> /dev/bus/usb/001/002: Operation not permitted
> husb: open device 1.2
> /dev/bus/usb/001/002: Operation not permitted
> husb: open device 1.2
> /dev/bus/usb/001/002: Operation not permitted
> husb: open device 1.2
> /dev/bus/usb/001/002: Operation not permitted
> husb: open device 1.2
> /dev/bus/usb/001/002: Operation not permitted
> .......
> 
>   Do I need to change something??
> 
> --
> CL Martinez
> carlopmart {at} gmail {d0t} com
> 
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Carlo(?),

USB pass-through should work.

Things to note:
1. Make sure that a driver (module) is not attaching to the device in
the host OS, blacklist it if possible.
2. Only USB 1.1/1.0 devices are supported.  If you have a pure USB 2.0
device, it is not going to work.

You could try passing up the whole PCI USB device, but I have had little
success.

G

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