Re: [PATCH 0/8] qemu: add support for virtio-input devices

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On Mon, Nov 30, 2015 at 09:14:11AM +0100, Martin Kletzander wrote:
> On Fri, Nov 27, 2015 at 02:36:09PM +0100, Pavel Hrdina wrote:
> >On Fri, Nov 20, 2015 at 09:59:35AM +0100, Ján Tomko wrote:
> >> Support virtio-keyboard, virtio-mouse, virtio-tablet and virtio-input-host.
> >>
> >> Requires kernel 4.1+ in the guest.
> >>
> >> https://www.kraxel.org/blog/2015/06/new-member-in-the-virtio-family-input-devices/
> >> https://bugzilla.redhat.com/show_bug.cgi?id=1231114
> >>
> >> Ján Tomko (8):
> >>   qemu: add capabilities for virtio input devices
> >>   conf: parse and format virtio input bus in domain XML
> >>   qemu: build command line for virtio input devices
> >>   qemu: add capability for virtio-input-host-device
> >>   conf: add XML for input device passthrough
> >>   security: label the evdev for input device passthrough
> >>   qemu: add passed-through input devs to cgroup ACL
> >>   qemu: build command line for virtio-input-host device
> >>
> >
> >ACK series.
> >
> >I have only one thing to mention, but it's not in scope of this series, it's
> >an existing behavior.  If you define a new guest with mouse/keyboard input
> >device with bus!=ps2 and graphics is defined, then we always add implicit mouse
> >and keyboard with bus=ps2 which leads to having two different mouses and
> >keyboards defined for the guest.  We should probably update the code to not add
> >any implicit mouse or keyboard if there is already one.
> >
> 
> I don't think it's that easy.  We add it to the XML because when we
> start QEMU with any graphics, it also automatically gains an
> additional mouse and keyboard.  We con't specify it on the command
> line, so we're merely trying so that the XML matches what the domain
> looks like.
> 

In that case we should put the ps/2 mouse and keyboard always in the domain XML
to represent actual state of the domain.

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