Re: [Xen-devel] [PATCH] libxl: Spice usbredirection support for upstream qemu

[Fabio Fantoni <fabio.fantoni@xxxxxxx>]

Il 05/07/2013 11:02, Paolo Bonzini ha scritto:
> ----- Messaggio originale -----
> > Da: "Fabio Fantoni" <fabio.fantoni@xxxxxxx>
> > A: "Paolo Bonzini" <pbonzini@xxxxxxxxxx>
> > Cc: "Andreas FÃrber" <afaerber@xxxxxxx>, "Stefano Stabellini" 
> > <stefano.stabellini@xxxxxxxxxxxxx>,
> > xen-devel@xxxxxxxxxxxxxxxxxxx, "Wei Liu" <wei.liu2@xxxxxxxxxx>, "Ian Campbell" 
> > <Ian.Campbell@xxxxxxxxxx>, "Ian
> > Jackson" <Ian.Jackson@xxxxxxxxxxxxx>, qemu-devel@xxxxxxxxxx, "Hans de Goede" 
> > <hdegoede@xxxxxxxxxx>,
> > spice-devel@xxxxxxxxxxxxxxxxxxxxx
> > Inviato: VenerdÃ, 5 luglio 2013 10:42:30
> > Oggetto: Re: [Xen-devel] [PATCH] libxl: Spice usbredirection support for 
> > upstream qemu
> >
> > Il 04/07/2013 22:09, Paolo Bonzini ha scritto:
> > > Il 04/07/2013 19:17, Andreas FÃrber ha scritto:
> > > > Also if at some point you try to use, e.g., q35 rather than i440fx
> > > > machine, it might have EHCI by default and the snippet would be
> > > > instantiating a duplicate one. I.e., the three levels of dependency
> > > > could be separated more clearly: PCI, USB, redirection.
> > > At least you could start specifying the USB desired version (1.1, 2.0
> > > with companion controllers, 3.0) as an extension of the "usb=1" that is
> > > already supported.
> > >
> > > Paolo
> > Thanks and sorry, I found only now that is working also with only
> > -device usb-ehci,id=usb.
> > I'll post a new patch version.
> With only the EHCI you might have problems redirecting USB 1.1 devices.
> The EHCI+UHCI magic is the right thing to do for USB 2.0 support on x86.
>
> What Andreas and I were suggesting was to split the patch in two parts:
> first adding support for USB 2.0/3.0, and only then adding redirection
> (perhaps with the possibility to customize how many redirected devices
> to support).
>
> Paolo
What is the best parameters for adding usb2 controller, those who had 
already done?
About usb1 controller implementation parameter in xen is only with -usb, 
is correct or need something better?
About usb3 controller implementation what is the best parameters?

About possibility to customize how many redirection channel I'll do it, 
if I remember good on Hans post on spice-devel I seen that max working 
is 4, is correct?
About different usb controller implementation on xen can be good change 
xl parameter usb from 0|1 (usb1 controller added or not) to 0|1|2|3 
where 0 is none, 1 is usb1, 2 is usb2 and 3 is usb3 or is better keep 
usb=0|1 and add usb_version=1|2|3 parameter?
Thanks for any reply and sorry for my bad english.

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