This patch adds support for reading input events directly from linux
evdev devices and forward them to the guest.  Unlike virtio-input-host
which simply passes on all events to the guest without looking at them
this will interpret the events and feed them into the qemu input
subsystem.

Therefore this is limited to what the qemu input subsystem and the
emulated input devices are able to handle.  Also there is no support for
absolute coordinates (tablet/touchscreen).  So we are talking here about
basic mouse and keyboard support.

The advantage is that it'll work without virtio-input drivers in the
guest, the events are delivered to the usual ps/2 or usb input devices
(depending on what the machine happens to have).  And for keyboards
qemu is able to switch the keyboard between guest and host on hotkey.
The hotkey is hard-coded for now (both control keys), initialy the
guest owns the keyboard.

Probably most useful when assigning vga devices with vfio and using a
physical monitor instead of vnc/spice/gtk as guest display.

Usage:  Add '-input-linux /dev/input/event<nr>' to the qemu command
line.  Note that udev has rules which populate /dev/input/by-{id,path}
with static names, which might be more convinient to use.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Message-id: 1457087116-4379-2-git-send-email-kraxel@redhat.com

This records user input (keyboard and mouse events) in record mode and replays
these input events in replay mode.
Signed-off-by: NPavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20150917162524.8676.11696.stgit@PASHA-ISP.def.inno>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NPavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Add function to bind input devices to display devices.  Implementing
input routing on top of this:  Events coming from the display device in
question are routed to the input device bound to it (if there is one).
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Add helper functions to translate KeyValue (qapi key representation)
into other representations: traditional qemu key numbers, qapi key
codes (Q_KEY_CODE_*) and scancode sequences.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Same as kbd_mouse_is_absolute(), but using new input core.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Likewise a bunch of helper functions to manage mouse button
and movement events, again to make life easier for the ui code.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

A bunch of helper functions to manage keyboard events,
to make life simpler for the ui code when submitting
keyboard events.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Register and unregister handlers.
Event dispatcher code.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>