On Tue, Jan 03, 2012 at 03:45:17PM -0500, John Sherwood wrote:
> On Tue, Jan 3, 2012 at 3:24 PM, Konrad Rzeszutek Wilk <
>
konrad.wilk@xxxxxxxxxx> wrote:
>
> > On Wed, Nov 16, 2011 at 03:26:06PM -0500, John Sherwood wrote:
> > > Hello,
> > >
> > > I'm working on a project and trying to pass through a PS/2 mouse +
> > keyboard
> > > to a hardware VM. I've played with numerous things (including the
> > obvious,
> > > using USB), but after finding no alternative, it seems like the best way
> > to
> > > approach this would be to modify qemu-dm to pipe through data from
> > > /dev/input/eventwhatever to the keyboard/mouse that qemu provides (and
> > then
> > > using this version of qemu-dm only for this special case).
> >
> > That is certainly one way. But you would have an interesting problem that
> > whatever
> > you type on your physical keyboard would appear in the guest _and_ in the
> > domain 0.
> >
>
> yeah, I actually tested it and it was quite amusing to watch the keyboard
> and mouse move on the monitor and in VNC.
>
>
> >
> > >
> > > I've been looking through the 4.1.0 source, specifically in
> > > tools/ioemu-qemu-xen, and it appears that I'd want to (for the keyboard)
> > > pass key codes from /dev/input through the kbd_put_keycode function.
> > From
> > > what I can tell, I'd probably want to split off a thread to do this
> > > somewhere in main() in vl.c. I was hoping that I could get some
> > > confirmation about whether I'm looking in the right places and/or
> > > suggestions about how to cleanly implement this. Odds are I won't be
> > able
> > > to go the whole 9 yards and implement configuration options for xm or
> > > command line switches for qemu-dm, but I would suspect that someone,
> > > somewhere, someday will also want this kind of ability. If it's already
> > > possible to pass through PS/2 devices without getting nuts in QEMU,
> > that's
> > > cool too :)
> >
> > Can't do that. The PS/2 is one of those legacy beasts that depends on
> > ioports.
> > But now that I think of it, maybe you can. In the guest config you can
> > specify
> > the ioports that you want to pass in. I hadn't tried to do this for the
> > keyboard
> > ports but maybe that will work for you?
> >
> >
> I tried forwarding the ioports (off the top of my head, I remember trying
> 60 and 64) but didn't have any luck - the kb/mouse weren't forwarded
> despite adding the requisite ioports config as per the docs. I theorized I
> was leaving off some config for the kernel, but didn't find anything. I
> agree that it certainly seems like this should work, and if you could
> elaborate on anything I could have goofed on, that would certainly be great
> (and hopefully, useful for anyone else who might try this in the future)
