virtio-input: add input routing support
Add display and head properties for input routing to virtio-input devices, update multiseat documentation. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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@ -2,8 +2,8 @@
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multiseat howto (with some multihead coverage)
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==============================================
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host side
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---------
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host devices
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------------
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First you must compile qemu with a user interface supporting
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multihead/multiseat and input event routing. Right now this
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@ -41,6 +41,19 @@ The "display=video2" sets up the input routing. Any input coming from
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the window which belongs to the video.2 display adapter will be routed
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to these input devices.
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Starting with qemu 2.4 and linux kernel 4.1 you can also use virtio
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for the input devices, using this ...
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-device pci-bridge,addr=12.0,chassis_nr=2,id=head.2 \
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-device secondary-vga,bus=head.2,addr=02.0,id=video.2 \
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-device virtio-keyboard-pci,bus=head.2,addr=03.0,display=video.2 \
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-device virtio-tablet-pci,bus=head.2,addr=03.0,display=video.2
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... instead of xhci and usb hid devices.
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host ui
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-------
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The sdl2 ui will start up with two windows, one for each display
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device. The gtk ui will start with a single window and each display
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in a separate tab. You can either simply switch tabs to switch heads,
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@ -252,7 +252,11 @@ static void virtio_input_handle_sync(DeviceState *dev)
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static void virtio_input_hid_realize(DeviceState *dev, Error **errp)
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{
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VirtIOInputHID *vhid = VIRTIO_INPUT_HID(dev);
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vhid->hs = qemu_input_handler_register(dev, vhid->handler);
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if (vhid->display && vhid->hs) {
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qemu_input_handler_bind(vhid->hs, vhid->display, vhid->head, NULL);
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}
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}
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static void virtio_input_hid_unrealize(DeviceState *dev, Error **errp)
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@ -301,10 +305,17 @@ static void virtio_input_hid_handle_status(VirtIOInput *vinput,
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}
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}
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static Property virtio_input_hid_properties[] = {
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DEFINE_PROP_STRING("display", VirtIOInputHID, display),
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DEFINE_PROP_UINT32("head", VirtIOInputHID, head, 0),
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};
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static void virtio_input_hid_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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VirtIOInputClass *vic = VIRTIO_INPUT_CLASS(klass);
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dc->props = virtio_input_hid_properties;
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vic->realize = virtio_input_hid_realize;
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vic->unrealize = virtio_input_hid_unrealize;
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vic->change_active = virtio_input_hid_change_active;
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@ -95,6 +95,8 @@ struct VirtIOInputClass {
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struct VirtIOInputHID {
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VirtIOInput parent_obj;
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char *display;
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uint32_t head;
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QemuInputHandler *handler;
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QemuInputHandlerState *hs;
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int ledstate;
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