linux-kernel - Re: [virtio-dev] Re: [PATCH v3] Add virtio-input driver.

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Message-ID: <1427210714.18768.23.camel@nilsson.home.kraxel.org>
Date:	Tue, 24 Mar 2015 16:25:14 +0100
From:	Gerd Hoffmann <kraxel@...hat.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	virtio-dev@...ts.oasis-open.org,
	virtualization@...ts.linux-foundation.org,
	David Herrmann <dh.herrmann@...il.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:ABI/API" <linux-api@...r.kernel.org>
Subject: Re: [virtio-dev] Re: [PATCH v3] Add virtio-input driver.

On Di, 2015-03-24 at 15:14 +0100, Michael S. Tsirkin wrote:
> On Tue, Mar 24, 2015 at 02:37:24PM +0100, Gerd Hoffmann wrote:
> >   Hi,
> > 
> > > > input layer checks it and ignores events not supported (according to the
> > > > support bitmaps).
> > > 
> > > Right but support bitmaps come from host too, no?
> > 
> > Yes, but the driver will not set invalid bits (bitcount argument for the
> > virtinput_cfg_bits() function is the number of valid bits of the
> > specific bitmap).
> > 
> > cheers,
> >   Gerd
> > 
> > 
> > 
> 
> Question: does linux ever get such events from userspace
> as opposed to sending them to userspace?

Yes, it's possible using the userspace input driver
(CONFIG_INPUT_UINPUT)

cheers,
  Gerd


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