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Re: [Xen-devel] [PATCH] libxl: add a vkbd device to HVM guests by defaul

To: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] libxl: add a vkbd device to HVM guests by default
From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Date: Mon, 27 Jun 2011 13:14:25 +0100
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
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On Mon, 27 Jun 2011, Ian Campbell wrote:
> On Fri, 2011-06-24 at 17:29 +0100, Stefano Stabellini wrote:
> > PV on HVM drivers can connect to the vkbd device to receive mouse and
> > keyboard events from Qemu. The advantage over USB is that vkbd doesn't
> > require frequent wakeups in Qemu.
> Do we need an unplug protocol in order to stop these frequent wakeups?

No, we just need to disable USB. The only reason to have USB is to have
USB tablet support (absolute mouse coordinates).

> Do frontends/guests generally cope with two keyboards correctly?
> (whatever correctly means, I guess it's not obvious once you have a vfb
> as well as emulated VGA).

Yes, without any problems. Having multiple vfbs would be more
complicated but it is not part of this series.

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