From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH RFC V2 3/5] libxl: add pvusb API
Date: Mon, 9 Mar 2015 09:39:51 +0000
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To: George Dunlap <George.Dunlap@eu.citrix.com>
Cc: Lars Kurth <lars.kurth@citrix.com>, Ian Jackson <ian.jackson@citrix.com>, Simon Cao <caobosimon@gmail.com>, Chunyan Liu <cyliu@suse.com>, "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
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On Fri, 2015-03-06 at 16:50 +0000, George Dunlap wrote:
> > +libxl_device_usb *
> > +libxl_device_usb_assignable_list(libxl_ctx *ctx, int *num)
> 
> I'm a bit ambivalent about this one.  For people using xl, "lsusb"
> should be just fine.  Is anyone building a toolstack on top of libxl
> directly going to need this functionality?  Would libvirt use this
> functionality, for instance, or would it use libusb?  Or just leave
> that to the caller?

Do USB devices not need to be bound to some sort of placeholder driver
(a la xen-pciback) or at least unbound from their actual driver before
they can be assigned to a guest?

If so then I would expect a function such as this to list the subset of
devices which have been correctly configured for USB passthrough, which
would be a subset of the output of lsusb I think.

Ian.