Re: [Xen-devel] USB Passthrough support X86_64

[Juergen Gross <jgross@xxxxxxxx>]

On 03/08/17 11:26, Ajmal M Ali wrote:
> Hi,
> 
> I need USB Passthrough for my work(pv). For that I am trying to write
> USB front and back drivers. Besides these what else is needed for the
> Passthrough to work?
> Should I have to also do the part to add device model(xl) or is it
> already done.

Done already.

> I got some patches for adding the front-end driver. Have anyone worked
> on backend for usb?

Its part of qemu (userland backend).


Juergen

> 
> If anyone could point me to anything that might help, that would be
> wonderful. I have minimal experience in Linux driver.
> 
> Regards
> Ajmal
> 
> 
> On 03-Aug-2017 2:48 PM, "Ajmal M Ali" <ajeeshb4u@xxxxxxxxx
> <mailto:ajeeshb4u@xxxxxxxxx>> wrote:
> 
> 
>     On 21-Jul-2017 2:17 PM, "Pasi Kärkkäinen" <pasik@xxxxxx
>     <mailto:pasik@xxxxxx>> wrote:
> 
>         On Fri, Jul 21, 2017 at 10:39:36AM +0200, Juergen Gross wrote:
>         > >
>         > > USB passthrough requires the device model. There is currently no
>         > > provision in toolstack to spawn a device model on demand.
>         > >
>         > > The easiest workaround is to add one device (vfb?) that
>         would require
>         > > spawning a device model when creating the domain.
>         > >
>         > >>
>         > >> i am trying to hotplug my usb. I haveint made any changes
>         in the config
>         > >> file, as i assumed it wont be needed for hotplug, also i
>         didnt have to do
>         > >> it for pci passthrough. Should i?
>         > >>
>         > >> Also, i cannot find any usbback and frond in my PC.
>         >
>         > Uuh, yes. I've sent some patches to LKML for pvUSB frontend
>         support
>         > about 2 years ago:
>         >
>         >
>         https://lists.xen.org/archives/html/xen-devel/2015-06/msg03436.html
>         <https://lists.xen.org/archives/html/xen-devel/2015-06/msg03436.html>
>         >
>         > I didn't find any time since then to address all comments. Maybe I
>         > should finish that task...
>         >
> 
>         That'd be awesome! :)
> 
>         > The patches should still work fine, AFAIK.
>         >
> 
>         Good to know.
> 
> 
>         -- Pasi
> 
>         >
>         > Juergen
>         >
> 


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