docs: add multiseat.txt

Howto on setting up multiseat for guests.

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

docs/multiseat.txt

@@ -0,0 +1,76 @@
+
+multiseat howto (with some multihead coverage)
+==============================================
+
+host side
+---------
+
+First you must compile qemu with a user interface supporting
+multihead/multiseat and input event routing.  Right now this list is
+pretty short: sdl2.
+
+  ./configure --enable-sdl --with-sdlabi=2.0
+
+
+Next put together the qemu command line:
+
+qemu	-enable-kvm -usb $memory $disk $whatever \
+	-display sdl \
+	-vga std \
+	-device usb-tablet
+
+That is it for the first head, which will use the standard vga, the
+standard ps/2 keyboard (implicitly there) and the usb-tablet.  Now the
+additional switches for the second head:
+
+	-device pci-bridge,addr=12.0,chassis_nr=2,id=head.2 \
+	-device secondary-vga,bus=head.2,addr=02.0,id=video.2 \
+	-device nec-usb-xhci,bus=head.2,addr=0f.0,id=usb.2 \
+	-device usb-kbd,bus=usb.2.0,port=1,display=video.2 \
+	-device usb-tablet,bus=usb.2.0,port=2,display=video.2
+
+This places a pci bridge in slot 12, connects a display adapter and
+xhci (usb) controller to the bridge.  Then it adds a usb keyboard and
+usb mouse, both connected to the xhci and linked to the display.
+
+The "display=video2" sets up the input routing.  Any input coming from
+the window which belongs to the video.2 display adapter will be routed
+to these input devices.
+
+
+guest side
+----------
+
+You need a pretty recent linux guest.  systemd with loginctl.  kernel
+3.14+ with CONFIG_DRM_BOCHS enabled.  Fedora 20 will do.  Must be
+fully updated for the new kernel though, i.e. the live iso doesn't cut
+it.
+
+Now we'll have to configure the guest.  Boot and login.  By default
+all devices belong to seat0.  You can use "loginctl seat-status seat0"
+to list them all (and to get the sysfs paths for cut+paste).  Now
+we'll go assign all pci devices connected the pci bridge in slot 12 to
+a new head:
+
+loginctl attach seat-qemu \
+	 /sys/devices/pci0000:00/0000:00:12.0/0000:01:02.0/drm/card1
+loginctl attach seat-qemu \
+	 /sys/devices/pci0000:00/0000:00:12.0/0000:01:02.0/graphics/fb1
+loginctl attach seat-qemu \
+	 /sys/devices/pci0000:00/0000:00:12.0/0000:01:0f.0/usb2
+
+Use "loginctl seat-status seat-qemu" to check the result.  It isn't
+needed to assign the usb devices to the head individually, assigning a
+usb (root) hub will automatically assign all usb devices connected to
+it too.
+
+BTW: loginctl writes udev rules to /etc/udev/rules.d to make these
+device assignments permanent, so you need to do this only once.
+
+Now simply restart gdm (rebooting will do too), and a login screen
+should show up on the second head.
+
+Enjoy!
+
+--
+Gerd Hoffmann <kraxel@redhat.com>

hw/input/hid.c

@@ -105,70 +105,135 @@ void hid_set_next_idle(HIDState *hs)
     }
 }
 
-static void hid_pointer_event_clear(HIDPointerEvent *e, int buttons)
+static void hid_pointer_event(DeviceState *dev, QemuConsole *src,
+                              InputEvent *evt)
 {
-    e->xdx = e->ydy = e->dz = 0;
-    e->buttons_state = buttons;
+    static const int bmap[INPUT_BUTTON_MAX] = {
+        [INPUT_BUTTON_LEFT]   = 0x01,
+        [INPUT_BUTTON_RIGHT]  = 0x02,
+        [INPUT_BUTTON_MIDDLE] = 0x04,
+    };
+    HIDState *hs = (HIDState *)dev;
+    HIDPointerEvent *e;
+
+    assert(hs->n < QUEUE_LENGTH);
+    e = &hs->ptr.queue[(hs->head + hs->n) & QUEUE_MASK];
+
+    switch (evt->kind) {
+    case INPUT_EVENT_KIND_REL:
+        if (evt->rel->axis == INPUT_AXIS_X) {
+            e->xdx += evt->rel->value;
+        } else if (evt->rel->axis == INPUT_AXIS_Y) {
+            e->ydy -= evt->rel->value;
+        }
+        break;
+
+    case INPUT_EVENT_KIND_ABS:
+        if (evt->rel->axis == INPUT_AXIS_X) {
+            e->xdx = evt->rel->value;
+        } else if (evt->rel->axis == INPUT_AXIS_Y) {
+            e->ydy = evt->rel->value;
+        }
+        break;
+
+    case INPUT_EVENT_KIND_BTN:
+        if (evt->btn->down) {
+            e->buttons_state |= bmap[evt->btn->button];
+            if (evt->btn->button == INPUT_BUTTON_WHEEL_UP) {
+                e->dz--;
+            } else if (evt->btn->button == INPUT_BUTTON_WHEEL_DOWN) {
+                e->dz++;
+            }
+        } else {
+            e->buttons_state &= ~bmap[evt->btn->button];
+        }
+        break;
+
+    default:
+        /* keep gcc happy */
+        break;
+    }
+
 }
 
-static void hid_pointer_event_combine(HIDPointerEvent *e, int xyrel,
-                                      int x1, int y1, int z1) {
-    if (xyrel) {
-        e->xdx += x1;
-        e->ydy += y1;
-    } else {
-        e->xdx = x1;
-        e->ydy = y1;
-        /* Windows drivers do not like the 0/0 position and ignore such
-         * events. */
-        if (!(x1 | y1)) {
-            e->xdx = 1;
+static void hid_pointer_sync(DeviceState *dev)
+{
+    HIDState *hs = (HIDState *)dev;
+    HIDPointerEvent *prev, *curr, *next;
+    bool event_compression = false;
+
+    if (hs->n == QUEUE_LENGTH-1) {
+        /*
+         * Queue full.  We are loosing information, but we at least
+         * keep track of most recent button state.
+         */
+        return;
+    }
+
+    prev = &hs->ptr.queue[(hs->head + hs->n - 1) & QUEUE_MASK];
+    curr = &hs->ptr.queue[(hs->head + hs->n) & QUEUE_MASK];
+    next = &hs->ptr.queue[(hs->head + hs->n + 1) & QUEUE_MASK];
+
+    if (hs->n > 0) {
+        /*
+         * No button state change between previous and current event
+         * (and previous wasn't seen by the guest yet), so there is
+         * motion information only and we can combine the two event
+         * into one.
+         */
+        if (curr->buttons_state == prev->buttons_state) {
+            event_compression = true;
         }
     }
-    e->dz += z1;
-}
 
-static void hid_pointer_event(void *opaque,
-                              int x1, int y1, int z1, int buttons_state)
-{
-    HIDState *hs = opaque;
-    unsigned use_slot = (hs->head + hs->n - 1) & QUEUE_MASK;
-    unsigned previous_slot = (use_slot - 1) & QUEUE_MASK;
-
-    /* We combine events where feasible to keep the queue small.  We shouldn't
-     * combine anything with the first event of a particular button state, as
-     * that would change the location of the button state change.  When the
-     * queue is empty, a second event is needed because we don't know if
-     * the first event changed the button state.  */
-    if (hs->n == QUEUE_LENGTH) {
-        /* Queue full.  Discard old button state, combine motion normally.  */
-        hs->ptr.queue[use_slot].buttons_state = buttons_state;
-    } else if (hs->n < 2 ||
-               hs->ptr.queue[use_slot].buttons_state != buttons_state ||
-               hs->ptr.queue[previous_slot].buttons_state !=
-               hs->ptr.queue[use_slot].buttons_state) {
-        /* Cannot or should not combine, so add an empty item to the queue.  */
-        QUEUE_INCR(use_slot);
+    if (event_compression) {
+        /* add current motion to previous, clear current */
+        if (hs->kind == HID_MOUSE) {
+            prev->xdx += curr->xdx;
+            curr->xdx = 0;
+            prev->ydy -= curr->ydy;
+            curr->ydy = 0;
+        } else {
+            prev->xdx = curr->xdx;
+            prev->ydy = curr->ydy;
+        }
+        prev->dz += curr->dz;
+        curr->dz = 0;
+    } else {
+        /* prepate next (clear rel, copy abs + btns) */
+        if (hs->kind == HID_MOUSE) {
+            next->xdx = 0;
+            next->ydy = 0;
+        } else {
+            next->xdx = curr->xdx;
+            next->ydy = curr->ydy;
+        }
+        next->dz = 0;
+        next->buttons_state = curr->buttons_state;
+        /* make current guest visible, notify guest */
         hs->n++;
-        hid_pointer_event_clear(&hs->ptr.queue[use_slot], buttons_state);
+        hs->event(hs);
     }
-    hid_pointer_event_combine(&hs->ptr.queue[use_slot],
-                              hs->kind == HID_MOUSE,
-                              x1, y1, z1);
-    hs->event(hs);
 }
 
-static void hid_keyboard_event(void *opaque, int keycode)
+static void hid_keyboard_event(DeviceState *dev, QemuConsole *src,
+                               InputEvent *evt)
 {
-    HIDState *hs = opaque;
+    HIDState *hs = (HIDState *)dev;
+    int scancodes[3], i, count;
     int slot;
 
-    if (hs->n == QUEUE_LENGTH) {
+    count = qemu_input_key_value_to_scancode(evt->key->key,
+                                             evt->key->down,
+                                             scancodes);
+    if (hs->n + count > QUEUE_LENGTH) {
         fprintf(stderr, "usb-kbd: warning: key event queue full\n");
         return;
     }
-    slot = (hs->head + hs->n) & QUEUE_MASK; hs->n++;
-    hs->kbd.keycodes[slot] = keycode;
+    for (i = 0; i < count; i++) {
+        slot = (hs->head + hs->n) & QUEUE_MASK; hs->n++;
+        hs->kbd.keycodes[slot] = scancodes[i];
+    }
     hs->event(hs);
 }
 
@@ -247,14 +312,14 @@ static inline int int_clamp(int val, int vmin, int vmax)
 void hid_pointer_activate(HIDState *hs)
 {
     if (!hs->ptr.mouse_grabbed) {
-        qemu_activate_mouse_event_handler(hs->ptr.eh_entry);
+        qemu_input_handler_activate(hs->s);
         hs->ptr.mouse_grabbed = 1;
     }
 }
 
 int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len)
 {
-    int dx, dy, dz, b, l;
+    int dx, dy, dz, l;
     int index;
     HIDPointerEvent *e;
 
@@ -279,17 +344,6 @@ int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len)
     dz = int_clamp(e->dz, -127, 127);
     e->dz -= dz;
 
-    b = 0;
-    if (e->buttons_state & MOUSE_EVENT_LBUTTON) {
-        b |= 0x01;
-    }
-    if (e->buttons_state & MOUSE_EVENT_RBUTTON) {
-        b |= 0x02;
-    }
-    if (e->buttons_state & MOUSE_EVENT_MBUTTON) {
-        b |= 0x04;
-    }
-
     if (hs->n &&
         !e->dz &&
         (hs->kind == HID_TABLET || (!e->xdx && !e->ydy))) {
@@ -304,7 +358,7 @@ int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len)
     switch (hs->kind) {
     case HID_MOUSE:
         if (len > l) {
-            buf[l++] = b;
+            buf[l++] = e->buttons_state;
         }
         if (len > l) {
             buf[l++] = dx;
@@ -319,7 +373,7 @@ int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len)
 
     case HID_TABLET:
         if (len > l) {
-            buf[l++] = b;
+            buf[l++] = e->buttons_state;
         }
         if (len > l) {
             buf[l++] = dx & 0xff;
@@ -413,31 +467,45 @@ void hid_reset(HIDState *hs)
 
 void hid_free(HIDState *hs)
 {
-    switch (hs->kind) {
-    case HID_KEYBOARD:
-        qemu_remove_kbd_event_handler(hs->kbd.eh_entry);
-        break;
-    case HID_MOUSE:
-    case HID_TABLET:
-        qemu_remove_mouse_event_handler(hs->ptr.eh_entry);
-        break;
-    }
+    qemu_input_handler_unregister(hs->s);
     hid_del_idle_timer(hs);
 }
 
+static QemuInputHandler hid_keyboard_handler = {
+    .name  = "QEMU HID Keyboard",
+    .mask  = INPUT_EVENT_MASK_KEY,
+    .event = hid_keyboard_event,
+};
+
+static QemuInputHandler hid_mouse_handler = {
+    .name  = "QEMU HID Mouse",
+    .mask  = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
+    .event = hid_pointer_event,
+    .sync  = hid_pointer_sync,
+};
+
+static QemuInputHandler hid_tablet_handler = {
+    .name  = "QEMU HID Tablet",
+    .mask  = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_ABS,
+    .event = hid_pointer_event,
+    .sync  = hid_pointer_sync,
+};
+
 void hid_init(HIDState *hs, int kind, HIDEventFunc event)
 {
     hs->kind = kind;
     hs->event = event;
 
     if (hs->kind == HID_KEYBOARD) {
-        hs->kbd.eh_entry = qemu_add_kbd_event_handler(hid_keyboard_event, hs);
+        hs->s = qemu_input_handler_register((DeviceState *)hs,
+                                            &hid_keyboard_handler);
+        qemu_input_handler_activate(hs->s);
     } else if (hs->kind == HID_MOUSE) {
-        hs->ptr.eh_entry = qemu_add_mouse_event_handler(hid_pointer_event, hs,
-                                                        0, "QEMU HID Mouse");
+        hs->s = qemu_input_handler_register((DeviceState *)hs,
+                                            &hid_mouse_handler);
     } else if (hs->kind == HID_TABLET) {
-        hs->ptr.eh_entry = qemu_add_mouse_event_handler(hid_pointer_event, hs,
-                                                        1, "QEMU HID Tablet");
+        hs->s = qemu_input_handler_register((DeviceState *)hs,
+                                            &hid_tablet_handler);
     }
 }
 

hw/usb/dev-hid.c

@@ -47,6 +47,8 @@ typedef struct USBHIDState {
     USBEndpoint *intr;
     HIDState hid;
     uint32_t usb_version;
+    char *display;
+    uint32_t head;
 } USBHIDState;
 
 enum {
@@ -574,6 +576,9 @@ static int usb_hid_initfn(USBDevice *dev, int kind)
     usb_desc_init(dev);
     us->intr = usb_ep_get(dev, USB_TOKEN_IN, 1);
     hid_init(&us->hid, kind, usb_hid_changed);
+    if (us->display && us->hid.s) {
+        qemu_input_handler_bind(us->hid.s, us->display, us->head, NULL);
+    }
     return 0;
 }
 
@@ -653,6 +658,8 @@ static void usb_hid_class_initfn(ObjectClass *klass, void *data)
 
 static Property usb_tablet_properties[] = {
         DEFINE_PROP_UINT32("usb_version", USBHIDState, usb_version, 2),
+        DEFINE_PROP_STRING("display", USBHIDState, display),
+        DEFINE_PROP_UINT32("head", USBHIDState, head, 0),
         DEFINE_PROP_END_OF_LIST(),
 };
 
@@ -696,6 +703,11 @@ static const TypeInfo usb_mouse_info = {
     .class_init    = usb_mouse_class_initfn,
 };
 
+static Property usb_keyboard_properties[] = {
+        DEFINE_PROP_STRING("display", USBHIDState, display),
+        DEFINE_PROP_END_OF_LIST(),
+};
+
 static void usb_keyboard_class_initfn(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -706,6 +718,7 @@ static void usb_keyboard_class_initfn(ObjectClass *klass, void *data)
     uc->product_desc   = "QEMU USB Keyboard";
     uc->usb_desc       = &desc_keyboard;
     dc->vmsd = &vmstate_usb_kbd;
+    dc->props = usb_keyboard_properties;
     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 }
 

include/hw/input/hid.h

@@ -2,6 +2,7 @@
 #define QEMU_HID_H
 
 #include "migration/vmstate.h"
+#include "ui/input.h"
 
 #define HID_MOUSE     1
 #define HID_TABLET    2
@@ -22,7 +23,6 @@ typedef void (*HIDEventFunc)(HIDState *s);
 typedef struct HIDMouseState {
     HIDPointerEvent queue[QUEUE_LENGTH];
     int mouse_grabbed;
-    QEMUPutMouseEntry *eh_entry;
 } HIDMouseState;
 
 typedef struct HIDKeyboardState {
@@ -31,7 +31,6 @@ typedef struct HIDKeyboardState {
     uint8_t leds;
     uint8_t key[16];
     int32_t keys;
-    QEMUPutKbdEntry *eh_entry;
 } HIDKeyboardState;
 
 struct HIDState {
@@ -47,6 +46,7 @@ struct HIDState {
     bool idle_pending;
     QEMUTimer *idle_timer;
     HIDEventFunc event;
+    QemuInputHandlerState *s;
 };
 
 void hid_init(HIDState *hs, int kind, HIDEventFunc event);

include/ui/input.h

@@ -29,6 +29,9 @@ QemuInputHandlerState *qemu_input_handler_register(DeviceState *dev,
 void qemu_input_handler_activate(QemuInputHandlerState *s);
 void qemu_input_handler_deactivate(QemuInputHandlerState *s);
 void qemu_input_handler_unregister(QemuInputHandlerState *s);
+void qemu_input_handler_bind(QemuInputHandlerState *s,
+                             const char *device_id, int head,
+                             Error **errp);
 void qemu_input_event_send(QemuConsole *src, InputEvent *evt);
 void qemu_input_event_sync(void);
 
@@ -36,6 +39,7 @@ InputEvent *qemu_input_event_new_key(KeyValue *key, bool down);
 void qemu_input_event_send_key(QemuConsole *src, KeyValue *key, bool down);
 void qemu_input_event_send_key_number(QemuConsole *src, int num, bool down);
 void qemu_input_event_send_key_qcode(QemuConsole *src, QKeyCode q, bool down);
+int qemu_input_key_number_to_qcode(uint8_t nr);
 int qemu_input_key_value_to_number(const KeyValue *value);
 int qemu_input_key_value_to_qcode(const KeyValue *value);
 int qemu_input_key_value_to_scancode(const KeyValue *value, bool down,

trace-events

@@ -1050,7 +1050,7 @@ gd_update(int x, int y, int w, int h) "x=%d, y=%d, w=%d, h=%d"
 gd_key_event(int gdk_keycode, int qemu_keycode, const char *action) "translated GDK keycode %d to QEMU keycode %d (%s)"
 
 # ui/input.c
-input_event_key_number(int conidx, int number, bool down) "con %d, key number 0x%x, down %d"
+input_event_key_number(int conidx, int number, const char *qcode, bool down) "con %d, key number 0x%x [%s], down %d"
 input_event_key_qcode(int conidx, const char *qcode, bool down) "con %d, key qcode %s, down %d"
 input_event_btn(int conidx, const char *btn, bool down) "con %d, button %s, down %d"
 input_event_rel(int conidx, const char *axis, int value) "con %d, axis %s, value %d"

ui/curses.c

@@ -288,8 +288,8 @@ static void curses_refresh(DisplayChangeListener *dcl)
                 qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, true);
             }
 
-            qemu_input_event_send_key_number(NULL, keycode, true);
-            qemu_input_event_send_key_number(NULL, keycode, false);
+            qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, true);
+            qemu_input_event_send_key_number(NULL, keycode & KEY_MASK, false);
 
             if (keycode & ALTGR) {
                 qemu_input_event_send_key_number(NULL, GREY | ALT_CODE, false);

ui/input-keymap.c

@@ -13,6 +13,8 @@ static const int qcode_to_number[] = {
     [Q_KEY_CODE_CTRL] = 0x1d,
     [Q_KEY_CODE_CTRL_R] = 0x9d,
 
+    [Q_KEY_CODE_META_L] = 0xdb,
+    [Q_KEY_CODE_META_R] = 0xdc,
     [Q_KEY_CODE_MENU] = 0xdd,
 
     [Q_KEY_CODE_ESC] = 0x01,
@@ -129,7 +131,7 @@ static const int qcode_to_number[] = {
     [Q_KEY_CODE_MAX] = 0,
 };
 
-static int number_to_qcode[0xff];
+static int number_to_qcode[0x100];
 
 int qemu_input_key_value_to_number(const KeyValue *value)
 {
@@ -141,7 +143,7 @@ int qemu_input_key_value_to_number(const KeyValue *value)
     }
 }
 
-int qemu_input_key_value_to_qcode(const KeyValue *value)
+int qemu_input_key_number_to_qcode(uint8_t nr)
 {
     static int first = true;
 
@@ -155,11 +157,16 @@ int qemu_input_key_value_to_qcode(const KeyValue *value)
         }
     }
 
+    return number_to_qcode[nr];
+}
+
+int qemu_input_key_value_to_qcode(const KeyValue *value)
+{
     if (value->kind == KEY_VALUE_KIND_QCODE) {
         return value->qcode;
     } else {
         assert(value->kind == KEY_VALUE_KIND_NUMBER);
-        return number_to_qcode[value->number];
+        return qemu_input_key_number_to_qcode(value->number);
     }
 }
 

ui/input.c

@@ -1,3 +1,4 @@
+#include "hw/qdev.h"
 #include "sysemu/sysemu.h"
 #include "qapi-types.h"
 #include "qmp-commands.h"
@@ -10,6 +11,7 @@ struct QemuInputHandlerState {
     QemuInputHandler  *handler;
     int               id;
     int               events;
+    QemuConsole       *con;
     QTAILQ_ENTRY(QemuInputHandlerState) node;
 };
 static QTAILQ_HEAD(, QemuInputHandlerState) handlers =
@@ -53,12 +55,46 @@ void qemu_input_handler_unregister(QemuInputHandlerState *s)
     qemu_input_check_mode_change();
 }
 
+void qemu_input_handler_bind(QemuInputHandlerState *s,
+                             const char *device_id, int head,
+                             Error **errp)
+{
+    DeviceState *dev;
+    QemuConsole *con;
+
+    dev = qdev_find_recursive(sysbus_get_default(), device_id);
+    if (dev == NULL) {
+        error_set(errp, QERR_DEVICE_NOT_FOUND, device_id);
+        return;
+    }
+
+    con = qemu_console_lookup_by_device(dev, head);
+    if (con == NULL) {
+        error_setg(errp, "Device %s is not bound to a QemuConsole", device_id);
+        return;
+    }
+
+    s->con = con;
+}
+
 static QemuInputHandlerState*
-qemu_input_find_handler(uint32_t mask)
+qemu_input_find_handler(uint32_t mask, QemuConsole *con)
 {
     QemuInputHandlerState *s;
 
     QTAILQ_FOREACH(s, &handlers, node) {
+        if (s->con == NULL || s->con != con) {
+            continue;
+        }
+        if (mask & s->handler->mask) {
+            return s;
+        }
+    }
+
+    QTAILQ_FOREACH(s, &handlers, node) {
+        if (s->con != NULL) {
+            continue;
+        }
         if (mask & s->handler->mask) {
             return s;
         }
@@ -94,7 +130,7 @@ static void qemu_input_transform_abs_rotate(InputEvent *evt)
 static void qemu_input_event_trace(QemuConsole *src, InputEvent *evt)
 {
     const char *name;
-    int idx = -1;
+    int qcode, idx = -1;
 
     if (src) {
         idx = qemu_console_get_index(src);
@@ -103,8 +139,10 @@ static void qemu_input_event_trace(QemuConsole *src, InputEvent *evt)
     case INPUT_EVENT_KIND_KEY:
         switch (evt->key->key->kind) {
         case KEY_VALUE_KIND_NUMBER:
+            qcode = qemu_input_key_number_to_qcode(evt->key->key->number);
+            name = QKeyCode_lookup[qcode];
             trace_input_event_key_number(idx, evt->key->key->number,
-                                         evt->key->down);
+                                         name, evt->key->down);
             break;
         case KEY_VALUE_KIND_QCODE:
             name = QKeyCode_lookup[evt->key->key->qcode];
@@ -149,7 +187,7 @@ void qemu_input_event_send(QemuConsole *src, InputEvent *evt)
     }
 
     /* send event */
-    s = qemu_input_find_handler(1 << evt->kind);
+    s = qemu_input_find_handler(1 << evt->kind, src);
     if (!s) {
         return;
     }
@@ -250,7 +288,8 @@ bool qemu_input_is_absolute(void)
 {
     QemuInputHandlerState *s;
 
-    s = qemu_input_find_handler(INPUT_EVENT_MASK_REL | INPUT_EVENT_MASK_ABS);
+    s = qemu_input_find_handler(INPUT_EVENT_MASK_REL | INPUT_EVENT_MASK_ABS,
+                                NULL);
     return (s != NULL) && (s->handler->mask & INPUT_EVENT_MASK_ABS);
 }
 

ui/sdl2.c

@@ -190,30 +190,33 @@ static void sdl_switch(DisplayChangeListener *dcl,
     }
 }
 
-static void reset_keys(void)
+static void reset_keys(struct sdl2_state *scon)
 {
+    QemuConsole *con = scon ? scon->dcl.con : NULL;
     int i;
 
     for (i = 0; i < 256; i++) {
         if (modifiers_state[i]) {
             int qcode = sdl2_scancode_to_qcode[i];
-            qemu_input_event_send_key_qcode(NULL, qcode, false);
+            qemu_input_event_send_key_qcode(con, qcode, false);
             modifiers_state[i] = 0;
         }
     }
 }
 
-static void sdl_process_key(SDL_KeyboardEvent *ev)
+static void sdl_process_key(struct sdl2_state *scon,
+                            SDL_KeyboardEvent *ev)
 {
     int qcode = sdl2_scancode_to_qcode[ev->keysym.scancode];
+    QemuConsole *con = scon ? scon->dcl.con : NULL;
 
     switch (ev->keysym.scancode) {
 #if 0
     case SDL_SCANCODE_NUMLOCKCLEAR:
     case SDL_SCANCODE_CAPSLOCK:
         /* SDL does not send the key up event, so we generate it */
-        qemu_input_event_send_key_qcode(NULL, qcode, true);
-        qemu_input_event_send_key_qcode(NULL, qcode, false);
+        qemu_input_event_send_key_qcode(con, qcode, true);
+        qemu_input_event_send_key_qcode(con, qcode, false);
         return;
 #endif
     case SDL_SCANCODE_LCTRL:
@@ -231,7 +234,7 @@ static void sdl_process_key(SDL_KeyboardEvent *ev)
         }
         /* fall though */
     default:
-        qemu_input_event_send_key_qcode(NULL, qcode,
+        qemu_input_event_send_key_qcode(con, qcode,
                                         ev->type == SDL_KEYDOWN);
     }
 }
@@ -506,7 +509,7 @@ static void handle_keydown(SDL_Event *ev)
         }
     }
     if (!gui_keysym) {
-        sdl_process_key(&ev->key);
+        sdl_process_key(scon, &ev->key);
     }
 }
 
@@ -531,13 +534,13 @@ static void handle_keyup(SDL_Event *ev)
             }
             /* SDL does not send back all the modifiers key, so we must
              * correct it. */
-            reset_keys();
+            reset_keys(scon);
             return;
         }
         gui_keysym = 0;
     }
     if (!gui_keysym) {
-        sdl_process_key(&ev->key);
+        sdl_process_key(scon, &ev->key);
     }
 }