From e0d2bd5195fdc032c8da566027a35a97aaa0394b Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Fri, 4 Mar 2016 11:25:14 +0100 Subject: input: linux evdev support 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' 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: Gerd Hoffmann Message-id: 1457087116-4379-2-git-send-email-kraxel@redhat.com --- include/ui/input.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/ui/input.h b/include/ui/input.h index d06a12dd4c..102d8a3341 100644 --- a/include/ui/input.h +++ b/include/ui/input.h @@ -65,4 +65,6 @@ void qemu_input_check_mode_change(void); void qemu_add_mouse_mode_change_notifier(Notifier *notify); void qemu_remove_mouse_mode_change_notifier(Notifier *notify); +int input_linux_init(void *opaque, QemuOpts *opts, Error **errp); + #endif /* INPUT_H */ -- cgit v1.2.3