Messages in this thread | | | Date | Tue, 24 Mar 2015 09:05:18 -0700 | From | Dmitry Torokhov <> | Subject | Re: [virtio-dev] Re: [PATCH v3] Add virtio-input driver. |
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On Tue, Mar 24, 2015 at 04:25:14PM +0100, Gerd Hoffmann wrote: > 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)
No, not through uinput (as from kernel POV uinput is also a driver), but users can write into evdev.
Sending unknown codes is OK: events of unknown type will be dropped by the input core, unknown event codes will be passed on; users not recognizing event code should simply ignore it.
Thanks.
-- Dmitry
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