Add D-Bus display backend

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Merge tag 'dbus-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging

Add D-Bus display backend

# gpg: Signature made Mon 20 Dec 2021 10:57:18 PM PST
# gpg:                using RSA key 87A9BD933F87C606D276F62DDAE8E10975969CE5
# gpg:                issuer "marcandre.lureau@redhat.com"
# gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>" [unknown]
# gpg:                 aka "Marc-André Lureau <marcandre.lureau@gmail.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276  F62D DAE8 E109 7596 9CE5

* tag 'dbus-pull-request' of https://gitlab.com/marcandre.lureau/qemu: (36 commits)
  MAINTAINERS: update D-Bus section
  ui/dbus: register D-Bus VC handler
  ui/dbus: add chardev backend & interface
  option: add g_auto for QemuOpts
  chardev: make socket derivable
  chardev: teach socket to accept no addresses
  ui/dbus: add clipboard interface
  audio: add "dbus" audio backend
  tests: start dbus-display-test
  tests/qtests: add qtest_qmp_add_client()
  ui/dbus: add p2p=on/off option
  ui: add a D-Bus display backend
  build-sys: set glib dependency version
  docs: add dbus-display documentation
  docs: move D-Bus VMState documentation to source XML
  backends: move dbus-vmstate1.xml to backends/
  docs/sphinx: add sphinx modules to include D-Bus documentation
  scripts: teach modinfo to skip non-C sources
  console: save current scanout details
  ui: move qemu_spice_fill_device_address to ui/util.c
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

MAINTAINERS

@@ -2873,11 +2873,15 @@ D-Bus
 M: Marc-André Lureau <marcandre.lureau@redhat.com>
 S: Maintained
 F: backends/dbus-vmstate.c
-F: tests/dbus-vmstate*
+F: ui/dbus*
+F: audio/dbus*
 F: util/dbus.c
+F: include/ui/dbus*
 F: include/qemu/dbus.h
-F: docs/interop/dbus.rst
-F: docs/interop/dbus-vmstate.rst
+F: docs/interop/dbus*
+F: docs/sphinx/dbus*
+F: docs/sphinx/fakedbusdoc.py
+F: tests/qtest/dbus*
 
 Seccomp
 M: Eduardo Otubo <otubo@redhat.com>

audio/audio.c

@@ -2000,6 +2000,7 @@ void audio_create_pdos(Audiodev *dev)
         CASE(NONE, none, );
         CASE(ALSA, alsa, Alsa);
         CASE(COREAUDIO, coreaudio, Coreaudio);
+        CASE(DBUS, dbus, );
         CASE(DSOUND, dsound, );
         CASE(JACK, jack, Jack);
         CASE(OSS, oss, Oss);

audio/audio_int.h

@@ -31,6 +31,10 @@
 #endif
 #include "mixeng.h"
 
+#ifdef CONFIG_GIO
+#include <gio/gio.h>
+#endif
+
 struct audio_pcm_ops;
 
 struct audio_callback {
@@ -140,6 +144,9 @@ struct audio_driver {
     const char *descr;
     void *(*init) (Audiodev *);
     void (*fini) (void *);
+#ifdef CONFIG_GIO
+    void (*set_dbus_server) (AudioState *s, GDBusObjectManagerServer *manager);
+#endif
     struct audio_pcm_ops *pcm_ops;
     int can_be_default;
     int max_voices_out;

audio/audio_template.h

@@ -327,6 +327,8 @@ AudiodevPerDirectionOptions *glue(audio_get_pdo_, TYPE)(Audiodev *dev)
     case AUDIODEV_DRIVER_COREAUDIO:
         return qapi_AudiodevCoreaudioPerDirectionOptions_base(
             dev->u.coreaudio.TYPE);
+    case AUDIODEV_DRIVER_DBUS:
+        return dev->u.dbus.TYPE;
     case AUDIODEV_DRIVER_DSOUND:
         return dev->u.dsound.TYPE;
     case AUDIODEV_DRIVER_JACK:

audio/dbusaudio.c

@@ -0,0 +1,654 @@
+/*
+ * QEMU DBus audio
+ *
+ * Copyright (c) 2021 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/error-report.h"
+#include "qemu/host-utils.h"
+#include "qemu/module.h"
+#include "qemu/timer.h"
+#include "qemu/dbus.h"
+
+#include <gio/gunixfdlist.h>
+#include "ui/dbus-display1.h"
+
+#define AUDIO_CAP "dbus"
+#include "audio.h"
+#include "audio_int.h"
+#include "trace.h"
+
+#define DBUS_DISPLAY1_AUDIO_PATH DBUS_DISPLAY1_ROOT "/Audio"
+
+#define DBUS_AUDIO_NSAMPLES 1024 /* could be configured? */
+
+typedef struct DBusAudio {
+    GDBusObjectManagerServer *server;
+    GDBusObjectSkeleton *audio;
+    QemuDBusDisplay1Audio *iface;
+    GHashTable *out_listeners;
+    GHashTable *in_listeners;
+} DBusAudio;
+
+typedef struct DBusVoiceOut {
+    HWVoiceOut hw;
+    bool enabled;
+    RateCtl rate;
+
+    void *buf;
+    size_t buf_pos;
+    size_t buf_size;
+
+    bool has_volume;
+    Volume volume;
+} DBusVoiceOut;
+
+typedef struct DBusVoiceIn {
+    HWVoiceIn hw;
+    bool enabled;
+    RateCtl rate;
+
+    bool has_volume;
+    Volume volume;
+} DBusVoiceIn;
+
+static void *dbus_get_buffer_out(HWVoiceOut *hw, size_t *size)
+{
+    DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);
+
+    if (!vo->buf) {
+        vo->buf_size = hw->samples * hw->info.bytes_per_frame;
+        vo->buf = g_malloc(vo->buf_size);
+        vo->buf_pos = 0;
+    }
+
+    *size = MIN(vo->buf_size - vo->buf_pos, *size);
+    *size = audio_rate_get_bytes(&hw->info, &vo->rate, *size);
+
+    return vo->buf + vo->buf_pos;
+
+}
+
+static size_t dbus_put_buffer_out(HWVoiceOut *hw, void *buf, size_t size)
+{
+    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;
+    DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);
+    GHashTableIter iter;
+    QemuDBusDisplay1AudioOutListener *listener = NULL;
+    g_autoptr(GBytes) bytes = NULL;
+    g_autoptr(GVariant) v_data = NULL;
+
+    assert(buf == vo->buf + vo->buf_pos && vo->buf_pos + size <= vo->buf_size);
+    vo->buf_pos += size;
+
+    trace_dbus_audio_put_buffer_out(size);
+
+    if (vo->buf_pos < vo->buf_size) {
+        return size;
+    }
+
+    bytes = g_bytes_new_take(g_steal_pointer(&vo->buf), vo->buf_size);
+    v_data = g_variant_new_from_bytes(G_VARIANT_TYPE("ay"), bytes, TRUE);
+    g_variant_ref_sink(v_data);
+
+    g_hash_table_iter_init(&iter, da->out_listeners);
+    while (g_hash_table_iter_next(&iter, NULL, (void **)&listener)) {
+        qemu_dbus_display1_audio_out_listener_call_write(
+            listener,
+            (uintptr_t)hw,
+            v_data,
+            G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+    }
+
+    return size;
+}
+
+#ifdef HOST_WORDS_BIGENDIAN
+#define AUDIO_HOST_BE TRUE
+#else
+#define AUDIO_HOST_BE FALSE
+#endif
+
+static void
+dbus_init_out_listener(QemuDBusDisplay1AudioOutListener *listener,
+                       HWVoiceOut *hw)
+{
+    qemu_dbus_display1_audio_out_listener_call_init(
+        listener,
+        (uintptr_t)hw,
+        hw->info.bits,
+        hw->info.is_signed,
+        hw->info.is_float,
+        hw->info.freq,
+        hw->info.nchannels,
+        hw->info.bytes_per_frame,
+        hw->info.bytes_per_second,
+        hw->info.swap_endianness ? !AUDIO_HOST_BE : AUDIO_HOST_BE,
+        G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+}
+
+static int
+dbus_init_out(HWVoiceOut *hw, struct audsettings *as, void *drv_opaque)
+{
+    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;
+    DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);
+    GHashTableIter iter;
+    QemuDBusDisplay1AudioOutListener *listener = NULL;
+
+    audio_pcm_init_info(&hw->info, as);
+    hw->samples = DBUS_AUDIO_NSAMPLES;
+    audio_rate_start(&vo->rate);
+
+    g_hash_table_iter_init(&iter, da->out_listeners);
+    while (g_hash_table_iter_next(&iter, NULL, (void **)&listener)) {
+        dbus_init_out_listener(listener, hw);
+    }
+    return 0;
+}
+
+static void
+dbus_fini_out(HWVoiceOut *hw)
+{
+    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;
+    DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);
+    GHashTableIter iter;
+    QemuDBusDisplay1AudioOutListener *listener = NULL;
+
+    g_hash_table_iter_init(&iter, da->out_listeners);
+    while (g_hash_table_iter_next(&iter, NULL, (void **)&listener)) {
+        qemu_dbus_display1_audio_out_listener_call_fini(
+            listener,
+            (uintptr_t)hw,
+            G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+    }
+
+    g_clear_pointer(&vo->buf, g_free);
+}
+
+static void
+dbus_enable_out(HWVoiceOut *hw, bool enable)
+{
+    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;
+    DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);
+    GHashTableIter iter;
+    QemuDBusDisplay1AudioOutListener *listener = NULL;
+
+    vo->enabled = enable;
+    if (enable) {
+        audio_rate_start(&vo->rate);
+    }
+
+    g_hash_table_iter_init(&iter, da->out_listeners);
+    while (g_hash_table_iter_next(&iter, NULL, (void **)&listener)) {
+        qemu_dbus_display1_audio_out_listener_call_set_enabled(
+            listener, (uintptr_t)hw, enable,
+            G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+    }
+}
+
+static void
+dbus_volume_out_listener(HWVoiceOut *hw,
+                         QemuDBusDisplay1AudioOutListener *listener)
+{
+    DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);
+    Volume *vol = &vo->volume;
+    g_autoptr(GBytes) bytes = NULL;
+    GVariant *v_vol = NULL;
+
+    if (!vo->has_volume) {
+        return;
+    }
+
+    assert(vol->channels < sizeof(vol->vol));
+    bytes = g_bytes_new(vol->vol, vol->channels);
+    v_vol = g_variant_new_from_bytes(G_VARIANT_TYPE("ay"), bytes, TRUE);
+    qemu_dbus_display1_audio_out_listener_call_set_volume(
+        listener, (uintptr_t)hw, vol->mute, v_vol,
+        G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+}
+
+static void
+dbus_volume_out(HWVoiceOut *hw, Volume *vol)
+{
+    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;
+    DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);
+    GHashTableIter iter;
+    QemuDBusDisplay1AudioOutListener *listener = NULL;
+
+    vo->has_volume = true;
+    vo->volume = *vol;
+
+    g_hash_table_iter_init(&iter, da->out_listeners);
+    while (g_hash_table_iter_next(&iter, NULL, (void **)&listener)) {
+        dbus_volume_out_listener(hw, listener);
+    }
+}
+
+static void
+dbus_init_in_listener(QemuDBusDisplay1AudioInListener *listener, HWVoiceIn *hw)
+{
+    qemu_dbus_display1_audio_in_listener_call_init(
+        listener,
+        (uintptr_t)hw,
+        hw->info.bits,
+        hw->info.is_signed,
+        hw->info.is_float,
+        hw->info.freq,
+        hw->info.nchannels,
+        hw->info.bytes_per_frame,
+        hw->info.bytes_per_second,
+        hw->info.swap_endianness ? !AUDIO_HOST_BE : AUDIO_HOST_BE,
+        G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+}
+
+static int
+dbus_init_in(HWVoiceIn *hw, struct audsettings *as, void *drv_opaque)
+{
+    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;
+    DBusVoiceIn *vo = container_of(hw, DBusVoiceIn, hw);
+    GHashTableIter iter;
+    QemuDBusDisplay1AudioInListener *listener = NULL;
+
+    audio_pcm_init_info(&hw->info, as);
+    hw->samples = DBUS_AUDIO_NSAMPLES;
+    audio_rate_start(&vo->rate);
+
+    g_hash_table_iter_init(&iter, da->in_listeners);
+    while (g_hash_table_iter_next(&iter, NULL, (void **)&listener)) {
+        dbus_init_in_listener(listener, hw);
+    }
+    return 0;
+}
+
+static void
+dbus_fini_in(HWVoiceIn *hw)
+{
+    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;
+    GHashTableIter iter;
+    QemuDBusDisplay1AudioInListener *listener = NULL;
+
+    g_hash_table_iter_init(&iter, da->in_listeners);
+    while (g_hash_table_iter_next(&iter, NULL, (void **)&listener)) {
+        qemu_dbus_display1_audio_in_listener_call_fini(
+            listener,
+            (uintptr_t)hw,
+            G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+    }
+}
+
+static void
+dbus_volume_in_listener(HWVoiceIn *hw,
+                         QemuDBusDisplay1AudioInListener *listener)
+{
+    DBusVoiceIn *vo = container_of(hw, DBusVoiceIn, hw);
+    Volume *vol = &vo->volume;
+    g_autoptr(GBytes) bytes = NULL;
+    GVariant *v_vol = NULL;
+
+    if (!vo->has_volume) {
+        return;
+    }
+
+    assert(vol->channels < sizeof(vol->vol));
+    bytes = g_bytes_new(vol->vol, vol->channels);
+    v_vol = g_variant_new_from_bytes(G_VARIANT_TYPE("ay"), bytes, TRUE);
+    qemu_dbus_display1_audio_in_listener_call_set_volume(
+        listener, (uintptr_t)hw, vol->mute, v_vol,
+        G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+}
+
+static void
+dbus_volume_in(HWVoiceIn *hw, Volume *vol)
+{
+    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;
+    DBusVoiceIn *vo = container_of(hw, DBusVoiceIn, hw);
+    GHashTableIter iter;
+    QemuDBusDisplay1AudioInListener *listener = NULL;
+
+    vo->has_volume = true;
+    vo->volume = *vol;
+
+    g_hash_table_iter_init(&iter, da->in_listeners);
+    while (g_hash_table_iter_next(&iter, NULL, (void **)&listener)) {
+        dbus_volume_in_listener(hw, listener);
+    }
+}
+
+static size_t
+dbus_read(HWVoiceIn *hw, void *buf, size_t size)
+{
+    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;
+    /* DBusVoiceIn *vo = container_of(hw, DBusVoiceIn, hw); */
+    GHashTableIter iter;
+    QemuDBusDisplay1AudioInListener *listener = NULL;
+
+    trace_dbus_audio_read(size);
+
+    /* size = audio_rate_get_bytes(&hw->info, &vo->rate, size); */
+
+    g_hash_table_iter_init(&iter, da->in_listeners);
+    while (g_hash_table_iter_next(&iter, NULL, (void **)&listener)) {
+        g_autoptr(GVariant) v_data = NULL;
+        const char *data;
+        gsize n = 0;
+
+        if (qemu_dbus_display1_audio_in_listener_call_read_sync(
+                listener,
+                (uintptr_t)hw,
+                size,
+                G_DBUS_CALL_FLAGS_NONE, -1,
+                &v_data, NULL, NULL)) {
+            data = g_variant_get_fixed_array(v_data, &n, 1);
+            g_warn_if_fail(n <= size);
+            size = MIN(n, size);
+            memcpy(buf, data, size);
+            break;
+        }
+    }
+
+    return size;
+}
+
+static void
+dbus_enable_in(HWVoiceIn *hw, bool enable)
+{
+    DBusAudio *da = (DBusAudio *)hw->s->drv_opaque;
+    DBusVoiceIn *vo = container_of(hw, DBusVoiceIn, hw);
+    GHashTableIter iter;
+    QemuDBusDisplay1AudioInListener *listener = NULL;
+
+    vo->enabled = enable;
+    if (enable) {
+        audio_rate_start(&vo->rate);
+    }
+
+    g_hash_table_iter_init(&iter, da->in_listeners);
+    while (g_hash_table_iter_next(&iter, NULL, (void **)&listener)) {
+        qemu_dbus_display1_audio_in_listener_call_set_enabled(
+            listener, (uintptr_t)hw, enable,
+            G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+    }
+}
+
+static void *
+dbus_audio_init(Audiodev *dev)
+{
+    DBusAudio *da = g_new0(DBusAudio, 1);
+
+    da->out_listeners = g_hash_table_new_full(g_str_hash, g_str_equal,
+                                                g_free, g_object_unref);
+    da->in_listeners = g_hash_table_new_full(g_str_hash, g_str_equal,
+                                               g_free, g_object_unref);
+    return da;
+}
+
+static void
+dbus_audio_fini(void *opaque)
+{
+    DBusAudio *da = opaque;
+
+    if (da->server) {
+        g_dbus_object_manager_server_unexport(da->server,
+                                              DBUS_DISPLAY1_AUDIO_PATH);
+    }
+    g_clear_object(&da->audio);
+    g_clear_object(&da->iface);
+    g_clear_pointer(&da->in_listeners, g_hash_table_unref);
+    g_clear_pointer(&da->out_listeners, g_hash_table_unref);
+    g_clear_object(&da->server);
+    g_free(da);
+}
+
+static void
+listener_out_vanished_cb(GDBusConnection *connection,
+                         gboolean remote_peer_vanished,
+                         GError *error,
+                         DBusAudio *da)
+{
+    char *name = g_object_get_data(G_OBJECT(connection), "name");
+
+    g_hash_table_remove(da->out_listeners, name);
+}
+
+static void
+listener_in_vanished_cb(GDBusConnection *connection,
+                        gboolean remote_peer_vanished,
+                        GError *error,
+                        DBusAudio *da)
+{
+    char *name = g_object_get_data(G_OBJECT(connection), "name");
+
+    g_hash_table_remove(da->in_listeners, name);
+}
+
+static gboolean
+dbus_audio_register_listener(AudioState *s,
+                             GDBusMethodInvocation *invocation,
+                             GUnixFDList *fd_list,
+                             GVariant *arg_listener,
+                             bool out)
+{
+    DBusAudio *da = s->drv_opaque;
+    const char *sender = g_dbus_method_invocation_get_sender(invocation);
+    g_autoptr(GDBusConnection) listener_conn = NULL;
+    g_autoptr(GError) err = NULL;
+    g_autoptr(GSocket) socket = NULL;
+    g_autoptr(GSocketConnection) socket_conn = NULL;
+    g_autofree char *guid = g_dbus_generate_guid();
+    GHashTable *listeners = out ? da->out_listeners : da->in_listeners;
+    GObject *listener;
+    int fd;
+
+    trace_dbus_audio_register(sender, out ? "out" : "in");
+
+    if (g_hash_table_contains(listeners, sender)) {
+        g_dbus_method_invocation_return_error(invocation,
+                                              DBUS_DISPLAY_ERROR,
+                                              DBUS_DISPLAY_ERROR_INVALID,
+                                              "`%s` is already registered!",
+                                              sender);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    fd = g_unix_fd_list_get(fd_list, g_variant_get_handle(arg_listener), &err);
+    if (err) {
+        g_dbus_method_invocation_return_error(invocation,
+                                              DBUS_DISPLAY_ERROR,
+                                              DBUS_DISPLAY_ERROR_FAILED,
+                                              "Couldn't get peer fd: %s",
+                                              err->message);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    socket = g_socket_new_from_fd(fd, &err);
+    if (err) {
+        g_dbus_method_invocation_return_error(invocation,
+                                              DBUS_DISPLAY_ERROR,
+                                              DBUS_DISPLAY_ERROR_FAILED,
+                                              "Couldn't make a socket: %s",
+                                              err->message);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+    socket_conn = g_socket_connection_factory_create_connection(socket);
+    if (out) {
+        qemu_dbus_display1_audio_complete_register_out_listener(
+            da->iface, invocation, NULL);
+    } else {
+        qemu_dbus_display1_audio_complete_register_in_listener(
+            da->iface, invocation, NULL);
+    }
+
+    listener_conn =
+        g_dbus_connection_new_sync(
+            G_IO_STREAM(socket_conn),
+            guid,
+            G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER,
+            NULL, NULL, &err);
+    if (err) {
+        error_report("Failed to setup peer connection: %s", err->message);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    listener = out ?
+        G_OBJECT(qemu_dbus_display1_audio_out_listener_proxy_new_sync(
+            listener_conn,
+            G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START,
+            NULL,
+            "/org/qemu/Display1/AudioOutListener",
+            NULL,
+            &err)) :
+        G_OBJECT(qemu_dbus_display1_audio_in_listener_proxy_new_sync(
+            listener_conn,
+            G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START,
+            NULL,
+            "/org/qemu/Display1/AudioInListener",
+            NULL,
+            &err));
+    if (!listener) {
+        error_report("Failed to setup proxy: %s", err->message);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    if (out) {
+        HWVoiceOut *hw;
+
+        QLIST_FOREACH(hw, &s->hw_head_out, entries) {
+            DBusVoiceOut *vo = container_of(hw, DBusVoiceOut, hw);
+            QemuDBusDisplay1AudioOutListener *l =
+                QEMU_DBUS_DISPLAY1_AUDIO_OUT_LISTENER(listener);
+
+            dbus_init_out_listener(l, hw);
+            qemu_dbus_display1_audio_out_listener_call_set_enabled(
+                l, (uintptr_t)hw, vo->enabled,
+                G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+        }
+    } else {
+        HWVoiceIn *hw;
+
+        QLIST_FOREACH(hw, &s->hw_head_in, entries) {
+            DBusVoiceIn *vo = container_of(hw, DBusVoiceIn, hw);
+            QemuDBusDisplay1AudioInListener *l =
+                QEMU_DBUS_DISPLAY1_AUDIO_IN_LISTENER(listener);
+
+            dbus_init_in_listener(
+                QEMU_DBUS_DISPLAY1_AUDIO_IN_LISTENER(listener), hw);
+            qemu_dbus_display1_audio_in_listener_call_set_enabled(
+                l, (uintptr_t)hw, vo->enabled,
+                G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+        }
+    }
+
+    g_object_set_data_full(G_OBJECT(listener_conn), "name",
+                           g_strdup(sender), g_free);
+    g_hash_table_insert(listeners, g_strdup(sender), listener);
+    g_object_connect(listener_conn,
+                     "signal::closed",
+                     out ? listener_out_vanished_cb : listener_in_vanished_cb,
+                     da,
+                     NULL);
+
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static gboolean
+dbus_audio_register_out_listener(AudioState *s,
+                                 GDBusMethodInvocation *invocation,
+                                 GUnixFDList *fd_list,
+                                 GVariant *arg_listener)
+{
+    return dbus_audio_register_listener(s, invocation,
+                                        fd_list, arg_listener, true);
+
+}
+
+static gboolean
+dbus_audio_register_in_listener(AudioState *s,
+                                GDBusMethodInvocation *invocation,
+                                GUnixFDList *fd_list,
+                                GVariant *arg_listener)
+{
+    return dbus_audio_register_listener(s, invocation,
+                                        fd_list, arg_listener, false);
+}
+
+static void
+dbus_audio_set_server(AudioState *s, GDBusObjectManagerServer *server)
+{
+    DBusAudio *da = s->drv_opaque;
+
+    g_assert(da);
+    g_assert(!da->server);
+
+    da->server = g_object_ref(server);
+
+    da->audio = g_dbus_object_skeleton_new(DBUS_DISPLAY1_AUDIO_PATH);
+    da->iface = qemu_dbus_display1_audio_skeleton_new();
+    g_object_connect(da->iface,
+                     "swapped-signal::handle-register-in-listener",
+                     dbus_audio_register_in_listener, s,
+                     "swapped-signal::handle-register-out-listener",
+                     dbus_audio_register_out_listener, s,
+                     NULL);
+
+    g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(da->audio),
+                                         G_DBUS_INTERFACE_SKELETON(da->iface));
+    g_dbus_object_manager_server_export(da->server, da->audio);
+}
+
+static struct audio_pcm_ops dbus_pcm_ops = {
+    .init_out = dbus_init_out,
+    .fini_out = dbus_fini_out,
+    .write    = audio_generic_write,
+    .get_buffer_out = dbus_get_buffer_out,
+    .put_buffer_out = dbus_put_buffer_out,
+    .enable_out = dbus_enable_out,
+    .volume_out = dbus_volume_out,
+
+    .init_in  = dbus_init_in,
+    .fini_in  = dbus_fini_in,
+    .read     = dbus_read,
+    .run_buffer_in = audio_generic_run_buffer_in,
+    .enable_in = dbus_enable_in,
+    .volume_in = dbus_volume_in,
+};
+
+static struct audio_driver dbus_audio_driver = {
+    .name            = "dbus",
+    .descr           = "Timer based audio exposed with DBus interface",
+    .init            = dbus_audio_init,
+    .fini            = dbus_audio_fini,
+    .set_dbus_server = dbus_audio_set_server,
+    .pcm_ops         = &dbus_pcm_ops,
+    .can_be_default  = 1,
+    .max_voices_out  = INT_MAX,
+    .max_voices_in   = INT_MAX,
+    .voice_size_out  = sizeof(DBusVoiceOut),
+    .voice_size_in   = sizeof(DBusVoiceIn)
+};
+
+static void register_audio_dbus(void)
+{
+    audio_driver_register(&dbus_audio_driver);
+}
+type_init(register_audio_dbus);
+
+module_dep("ui-dbus")

audio/meson.build

@@ -26,4 +26,10 @@ foreach m : [
   endif
 endforeach
 
+if dbus_display
+    module_ss = ss.source_set()
+    module_ss.add(when: gio, if_true: files('dbusaudio.c'))
+    audio_modules += {'dbus': module_ss}
+endif
+
 modules += {'audio': audio_modules}

audio/trace-events

@@ -13,6 +13,11 @@ alsa_resume_out(void) "Resuming suspended output stream"
 # ossaudio.c
 oss_version(int version) "OSS version = 0x%x"
 
+# dbusaudio.c
+dbus_audio_register(const char *s, const char *dir) "sender = %s, dir = %s"
+dbus_audio_put_buffer_out(size_t len) "len = %zu"
+dbus_audio_read(size_t len) "len = %zu"
+
 # audio.c
 audio_timer_start(int interval) "interval %d ms"
 audio_timer_stop(void) ""

backends/dbus-vmstate1.xml

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<node name="/" xmlns:doc="http://www.freedesktop.org/dbus/1.0/doc.dtd">
+  <!--
+      org.qemu.VMState1:
+
+      This interface must be implemented at the object path
+      ``/org/qemu/VMState1`` to support helper migration.
+  -->
+  <interface name="org.qemu.VMState1">
+
+    <!--
+        Id:
+
+        A string that identifies the helper uniquely. (maximum 256 bytes
+        including terminating NUL byte)
+
+        .. note::
+
+           The VMState helper ID namespace is its own namespace. In particular,
+           it is not related to QEMU "id" used in -object/-device objects.
+    -->
+    <property name="Id" type="s" access="read"/>
+
+    <!--
+        Load:
+        @data: data to restore the state.
+
+        The method called on destination with the state to restore.
+
+        The helper may be initially started in a waiting state (with an
+        ``-incoming`` argument for example), and it may resume on success.
+
+        An error may be returned to the caller.
+    -->
+    <method name="Load">
+      <arg type="ay" name="data" direction="in"/>
+    </method>
+
+    <!--
+        Save:
+        @data: state data to save for later resume.
+
+        The method called on the source to get the current state to be
+        migrated. The helper should continue to run normally.
+
+        An error may be returned to the caller.
+    -->
+    <method name="Save">
+      <arg type="ay" name="data" direction="out"/>
+    </method>
+  </interface>
+</node>

chardev/char-socket.c

@@ -25,9 +25,7 @@
 #include "qemu/osdep.h"
 #include "chardev/char.h"
 #include "io/channel-socket.h"
-#include "io/channel-tls.h"
 #include "io/channel-websock.h"
-#include "io/net-listener.h"
 #include "qemu/error-report.h"
 #include "qemu/module.h"
 #include "qemu/option.h"
@@ -37,61 +35,7 @@
 #include "qemu/yank.h"
 
 #include "chardev/char-io.h"
-#include "qom/object.h"
-
-/***********************************************************/
-/* TCP Net console */
-
-#define TCP_MAX_FDS 16
-
-typedef struct {
-    char buf[21];
-    size_t buflen;
-} TCPChardevTelnetInit;
-
-typedef enum {
-    TCP_CHARDEV_STATE_DISCONNECTED,
-    TCP_CHARDEV_STATE_CONNECTING,
-    TCP_CHARDEV_STATE_CONNECTED,
-} TCPChardevState;
-
-struct SocketChardev {
-    Chardev parent;
-    QIOChannel *ioc; /* Client I/O channel */
-    QIOChannelSocket *sioc; /* Client master channel */
-    QIONetListener *listener;
-    GSource *hup_source;
-    QCryptoTLSCreds *tls_creds;
-    char *tls_authz;
-    TCPChardevState state;
-    int max_size;
-    int do_telnetopt;
-    int do_nodelay;
-    int *read_msgfds;
-    size_t read_msgfds_num;
-    int *write_msgfds;
-    size_t write_msgfds_num;
-    bool registered_yank;
-
-    SocketAddress *addr;
-    bool is_listen;
-    bool is_telnet;
-    bool is_tn3270;
-    GSource *telnet_source;
-    TCPChardevTelnetInit *telnet_init;
-
-    bool is_websock;
-
-    GSource *reconnect_timer;
-    int64_t reconnect_time;
-    bool connect_err_reported;
-
-    QIOTask *connect_task;
-};
-typedef struct SocketChardev SocketChardev;
-
-DECLARE_INSTANCE_CHECKER(SocketChardev, SOCKET_CHARDEV,
-                         TYPE_CHARDEV_SOCKET)
+#include "chardev/char-socket.h"
 
 static gboolean socket_reconnect_timeout(gpointer opaque);
 static void tcp_chr_telnet_init(Chardev *chr);
@@ -1248,6 +1192,10 @@ static int qmp_chardev_open_socket_server(Chardev *chr,
     qio_net_listener_set_name(s->listener, name);
     g_free(name);
 
+    if (s->addr->type == SOCKET_ADDRESS_TYPE_FD && !*s->addr->u.fd.str) {
+        goto skip_listen;
+    }
+
     if (qio_net_listener_open_sync(s->listener, s->addr, 1, errp) < 0) {
         object_unref(OBJECT(s->listener));
         s->listener = NULL;
@@ -1256,6 +1204,8 @@ static int qmp_chardev_open_socket_server(Chardev *chr,
 
     qapi_free_SocketAddress(s->addr);
     s->addr = socket_local_address(s->listener->sioc[0]->fd, errp);
+
+skip_listen:
     update_disconnected_filename(s);
 
     if (is_waitconnect) {
@@ -1466,9 +1416,9 @@ static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
     SocketAddressLegacy *addr;
     ChardevSocket *sock;
 
-    if ((!!path + !!fd + !!host) != 1) {
+    if ((!!path + !!fd + !!host) > 1) {
         error_setg(errp,
-                   "Exactly one of 'path', 'fd' or 'host' required");
+                   "None or one of 'path', 'fd' or 'host' option required.");
         return;
     }
 
@@ -1542,12 +1492,10 @@ static void qemu_chr_parse_socket(QemuOpts *opts, ChardevBackend *backend,
             .has_ipv6 = qemu_opt_get(opts, "ipv6"),
             .ipv6 = qemu_opt_get_bool(opts, "ipv6", 0),
         };
-    } else if (fd) {
+    } else {
         addr->type = SOCKET_ADDRESS_TYPE_FD;
         addr->u.fd.data = g_new(String, 1);
         addr->u.fd.data->str = g_strdup(fd);
-    } else {
-        g_assert_not_reached();
     }
     sock->addr = addr;
 }

configure

@@ -3694,6 +3694,7 @@ echo "QEMU_CFLAGS=$QEMU_CFLAGS" >> $config_host_mak
 echo "QEMU_CXXFLAGS=$QEMU_CXXFLAGS" >> $config_host_mak
 echo "GLIB_CFLAGS=$glib_cflags" >> $config_host_mak
 echo "GLIB_LIBS=$glib_libs" >> $config_host_mak
+echo "GLIB_VERSION=$(pkg-config --modversion glib-2.0)" >> $config_host_mak
 echo "QEMU_LDFLAGS=$QEMU_LDFLAGS" >> $config_host_mak
 echo "LD_I386_EMULATION=$ld_i386_emulation" >> $config_host_mak
 echo "EXESUF=$EXESUF" >> $config_host_mak

docs/conf.py

@@ -73,6 +73,12 @@ needs_sphinx = '1.6'
 # ones.
 extensions = ['kerneldoc', 'qmp_lexer', 'hxtool', 'depfile', 'qapidoc']
 
+if sphinx.version_info[:3] > (4, 0, 0):
+    tags.add('sphinx4')
+    extensions += ['dbusdoc']
+else:
+    extensions += ['fakedbusdoc']
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = [os.path.join(qemu_docdir, '_templates')]
 
@@ -311,3 +317,5 @@ kerneldoc_bin = ['perl', os.path.join(qemu_docdir, '../scripts/kernel-doc')]
 kerneldoc_srctree = os.path.join(qemu_docdir, '..')
 hxtool_srctree = os.path.join(qemu_docdir, '..')
 qapidoc_srctree = os.path.join(qemu_docdir, '..')
+dbusdoc_srctree = os.path.join(qemu_docdir, '..')
+dbus_index_common_prefix = ["org.qemu."]

docs/interop/dbus-display.rst

@@ -0,0 +1,31 @@
+D-Bus display
+=============
+
+QEMU can export the VM display through D-Bus (when started with ``-display
+dbus``), to allow out-of-process UIs, remote protocol servers or other
+interactive display usages.
+
+Various specialized D-Bus interfaces are available on different object paths
+under ``/org/qemu/Display1/``, depending on the VM configuration.
+
+QEMU also implements the standard interfaces, such as
+`org.freedesktop.DBus.Introspectable
+<https://dbus.freedesktop.org/doc/dbus-specification.html#standard-interfaces>`_.
+
+.. contents::
+   :local:
+   :depth: 1
+
+.. only:: sphinx4
+
+   .. dbus-doc:: ui/dbus-display1.xml
+
+.. only:: not sphinx4
+
+   .. warning::
+      Sphinx 4 is required to build D-Bus documentation.
+
+      This is the content of ``ui/dbus-display1.xml``:
+
+   .. literalinclude:: ../../ui/dbus-display1.xml
+      :language: xml

docs/interop/dbus-vmstate.rst

@@ -2,9 +2,6 @@
 D-Bus VMState
 =============
 
-Introduction
-============
-
 The QEMU dbus-vmstate object's aim is to migrate helpers' data running
 on a QEMU D-Bus bus. (refer to the :doc:`dbus` document for
 some recommendations on D-Bus usage)
@@ -26,49 +23,16 @@ dbus-vmstate object can be configured with the expected list of
 helpers by setting its ``id-list`` property, with a comma-separated
 ``Id`` list.
 
-Interface
-=========
+.. only:: sphinx4
 
-On object path ``/org/qemu/VMState1``, the following
-``org.qemu.VMState1`` interface should be implemented:
+   .. dbus-doc:: backends/dbus-vmstate1.xml
 
-.. code:: xml
+.. only:: not sphinx4
 
-  <interface name="org.qemu.VMState1">
-    <property name="Id" type="s" access="read"/>
-    <method name="Load">
-      <arg type="ay" name="data" direction="in"/>
-    </method>
-    <method name="Save">
-      <arg type="ay" name="data" direction="out"/>
-    </method>
-  </interface>
+   .. warning::
+      Sphinx 4 is required to build D-Bus documentation.
 
-"Id" property
--------------
+      This is the content of ``backends/dbus-vmstate1.xml``:
 
-A string that identifies the helper uniquely. (maximum 256 bytes
-including terminating NUL byte)
-
-.. note::
-
-   The helper ID namespace is a separate namespace. In particular, it is not
-   related to QEMU "id" used in -object/-device objects.
-
-Load(in u8[] bytes) method
---------------------------
-
-The method called on destination with the state to restore.
-
-The helper may be initially started in a waiting state (with
-an --incoming argument for example), and it may resume on success.
-
-An error may be returned to the caller.
-
-Save(out u8[] bytes) method
----------------------------
-
-The method called on the source to get the current state to be
-migrated. The helper should continue to run normally.
-
-An error may be returned to the caller.
+   .. literalinclude:: ../../backends/dbus-vmstate1.xml
+      :language: xml

docs/interop/dbus.rst

@@ -108,3 +108,5 @@ QEMU Interfaces
 ===============
 
 :doc:`dbus-vmstate`
+
+:doc:`dbus-display`

docs/interop/index.rst

@@ -12,6 +12,7 @@ are useful for making QEMU interoperate with other software.
    bitmaps
    dbus
    dbus-vmstate
+   dbus-display
    live-block-operations
    pr-helper
    qemu-ga

docs/sphinx/dbusdoc.py

@@ -0,0 +1,166 @@
+# D-Bus XML documentation extension
+#
+# Copyright (C) 2021, Red Hat Inc.
+#
+# SPDX-License-Identifier: LGPL-2.1-or-later
+#
+# Author: Marc-André Lureau <marcandre.lureau@redhat.com>
+"""dbus-doc is a Sphinx extension that provides documentation from D-Bus XML."""
+
+import os
+import re
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    Dict,
+    Iterator,
+    List,
+    Optional,
+    Sequence,
+    Set,
+    Tuple,
+    Type,
+    TypeVar,
+    Union,
+)
+
+import sphinx
+from docutils import nodes
+from docutils.nodes import Element, Node
+from docutils.parsers.rst import Directive, directives
+from docutils.parsers.rst.states import RSTState
+from docutils.statemachine import StringList, ViewList
+from sphinx.application import Sphinx
+from sphinx.errors import ExtensionError
+from sphinx.util import logging
+from sphinx.util.docstrings import prepare_docstring
+from sphinx.util.docutils import SphinxDirective, switch_source_input
+from sphinx.util.nodes import nested_parse_with_titles
+
+import dbusdomain
+from dbusparser import parse_dbus_xml
+
+logger = logging.getLogger(__name__)
+
+__version__ = "1.0"
+
+
+class DBusDoc:
+    def __init__(self, sphinx_directive, dbusfile):
+        self._cur_doc = None
+        self._sphinx_directive = sphinx_directive
+        self._dbusfile = dbusfile
+        self._top_node = nodes.section()
+        self.result = StringList()
+        self.indent = ""
+
+    def add_line(self, line: str, *lineno: int) -> None:
+        """Append one line of generated reST to the output."""
+        if line.strip():  # not a blank line
+            self.result.append(self.indent + line, self._dbusfile, *lineno)
+        else:
+            self.result.append("", self._dbusfile, *lineno)
+
+    def add_method(self, method):
+        self.add_line(f".. dbus:method:: {method.name}")
+        self.add_line("")
+        self.indent += "   "
+        for arg in method.in_args:
+            self.add_line(f":arg {arg.signature} {arg.name}: {arg.doc_string}")
+        for arg in method.out_args:
+            self.add_line(f":ret {arg.signature} {arg.name}: {arg.doc_string}")
+        self.add_line("")
+        for line in prepare_docstring("\n" + method.doc_string):
+            self.add_line(line)
+        self.indent = self.indent[:-3]
+
+    def add_signal(self, signal):
+        self.add_line(f".. dbus:signal:: {signal.name}")
+        self.add_line("")
+        self.indent += "   "
+        for arg in signal.args:
+            self.add_line(f":arg {arg.signature} {arg.name}: {arg.doc_string}")
+        self.add_line("")
+        for line in prepare_docstring("\n" + signal.doc_string):
+            self.add_line(line)
+        self.indent = self.indent[:-3]
+
+    def add_property(self, prop):
+        self.add_line(f".. dbus:property:: {prop.name}")
+        self.indent += "   "
+        self.add_line(f":type: {prop.signature}")
+        access = {"read": "readonly", "write": "writeonly", "readwrite": "readwrite"}[
+            prop.access
+        ]
+        self.add_line(f":{access}:")
+        if prop.emits_changed_signal:
+            self.add_line(f":emits-changed: yes")
+        self.add_line("")
+        for line in prepare_docstring("\n" + prop.doc_string):
+            self.add_line(line)
+        self.indent = self.indent[:-3]
+
+    def add_interface(self, iface):
+        self.add_line(f".. dbus:interface:: {iface.name}")
+        self.add_line("")
+        self.indent += "   "
+        for line in prepare_docstring("\n" + iface.doc_string):
+            self.add_line(line)
+        for method in iface.methods:
+            self.add_method(method)
+        for sig in iface.signals:
+            self.add_signal(sig)
+        for prop in iface.properties:
+            self.add_property(prop)
+        self.indent = self.indent[:-3]
+
+
+def parse_generated_content(state: RSTState, content: StringList) -> List[Node]:
+    """Parse a generated content by Documenter."""
+    with switch_source_input(state, content):
+        node = nodes.paragraph()
+        node.document = state.document
+        state.nested_parse(content, 0, node)
+
+        return node.children
+
+
+class DBusDocDirective(SphinxDirective):
+    """Extract documentation from the specified D-Bus XML file"""
+
+    has_content = True
+    required_arguments = 1
+    optional_arguments = 0
+    final_argument_whitespace = True
+
+    def run(self):
+        reporter = self.state.document.reporter
+
+        try:
+            source, lineno = reporter.get_source_and_line(self.lineno)  # type: ignore
+        except AttributeError:
+            source, lineno = (None, None)
+
+        logger.debug("[dbusdoc] %s:%s: input:\n%s", source, lineno, self.block_text)
+
+        env = self.state.document.settings.env
+        dbusfile = env.config.qapidoc_srctree + "/" + self.arguments[0]
+        with open(dbusfile, "rb") as f:
+            xml_data = f.read()
+        xml = parse_dbus_xml(xml_data)
+        doc = DBusDoc(self, dbusfile)
+        for iface in xml:
+            doc.add_interface(iface)
+
+        result = parse_generated_content(self.state, doc.result)
+        return result
+
+
+def setup(app: Sphinx) -> Dict[str, Any]:
+    """Register dbus-doc directive with Sphinx"""
+    app.add_config_value("dbusdoc_srctree", None, "env")
+    app.add_directive("dbus-doc", DBusDocDirective)
+    dbusdomain.setup(app)
+
+    return dict(version=__version__, parallel_read_safe=True, parallel_write_safe=True)

docs/sphinx/dbusdomain.py

@@ -0,0 +1,406 @@
+# D-Bus sphinx domain extension
+#
+# Copyright (C) 2021, Red Hat Inc.
+#
+# SPDX-License-Identifier: LGPL-2.1-or-later
+#
+# Author: Marc-André Lureau <marcandre.lureau@redhat.com>
+
+from typing import (
+    Any,
+    Dict,
+    Iterable,
+    Iterator,
+    List,
+    NamedTuple,
+    Optional,
+    Tuple,
+    cast,
+)
+
+from docutils import nodes
+from docutils.nodes import Element, Node
+from docutils.parsers.rst import directives
+from sphinx import addnodes
+from sphinx.addnodes import desc_signature, pending_xref
+from sphinx.directives import ObjectDescription
+from sphinx.domains import Domain, Index, IndexEntry, ObjType
+from sphinx.locale import _
+from sphinx.roles import XRefRole
+from sphinx.util import nodes as node_utils
+from sphinx.util.docfields import Field, TypedField
+from sphinx.util.typing import OptionSpec
+
+
+class DBusDescription(ObjectDescription[str]):
+    """Base class for DBus objects"""
+
+    option_spec: OptionSpec = ObjectDescription.option_spec.copy()
+    option_spec.update(
+        {
+            "deprecated": directives.flag,
+        }
+    )
+
+    def get_index_text(self, modname: str, name: str) -> str:
+        """Return the text for the index entry of the object."""
+        raise NotImplementedError("must be implemented in subclasses")
+
+    def add_target_and_index(
+        self, name: str, sig: str, signode: desc_signature
+    ) -> None:
+        ifacename = self.env.ref_context.get("dbus:interface")
+        node_id = name
+        if ifacename:
+            node_id = f"{ifacename}.{node_id}"
+
+        signode["names"].append(name)
+        signode["ids"].append(node_id)
+
+        if "noindexentry" not in self.options:
+            indextext = self.get_index_text(ifacename, name)
+            if indextext:
+                self.indexnode["entries"].append(
+                    ("single", indextext, node_id, "", None)
+                )
+
+        domain = cast(DBusDomain, self.env.get_domain("dbus"))
+        domain.note_object(name, self.objtype, node_id, location=signode)
+
+
+class DBusInterface(DBusDescription):
+    """
+    Implementation of ``dbus:interface``.
+    """
+
+    def get_index_text(self, ifacename: str, name: str) -> str:
+        return ifacename
+
+    def before_content(self) -> None:
+        self.env.ref_context["dbus:interface"] = self.arguments[0]
+
+    def after_content(self) -> None:
+        self.env.ref_context.pop("dbus:interface")
+
+    def handle_signature(self, sig: str, signode: desc_signature) -> str:
+        signode += addnodes.desc_annotation("interface ", "interface ")
+        signode += addnodes.desc_name(sig, sig)
+        return sig
+
+    def run(self) -> List[Node]:
+        _, node = super().run()
+        name = self.arguments[0]
+        section = nodes.section(ids=[name + "-section"])
+        section += nodes.title(name, "%s interface" % name)
+        section += node
+        return [self.indexnode, section]
+
+
+class DBusMember(DBusDescription):
+
+    signal = False
+
+
+class DBusMethod(DBusMember):
+    """
+    Implementation of ``dbus:method``.
+    """
+
+    option_spec: OptionSpec = DBusMember.option_spec.copy()
+    option_spec.update(
+        {
+            "noreply": directives.flag,
+        }
+    )
+
+    doc_field_types: List[Field] = [
+        TypedField(
+            "arg",
+            label=_("Arguments"),
+            names=("arg",),
+            rolename="arg",
+            typerolename=None,
+            typenames=("argtype", "type"),
+        ),
+        TypedField(
+            "ret",
+            label=_("Returns"),
+            names=("ret",),
+            rolename="ret",
+            typerolename=None,
+            typenames=("rettype", "type"),
+        ),
+    ]
+
+    def get_index_text(self, ifacename: str, name: str) -> str:
+        return _("%s() (%s method)") % (name, ifacename)
+
+    def handle_signature(self, sig: str, signode: desc_signature) -> str:
+        params = addnodes.desc_parameterlist()
+        returns = addnodes.desc_parameterlist()
+
+        contentnode = addnodes.desc_content()
+        self.state.nested_parse(self.content, self.content_offset, contentnode)
+        for child in contentnode:
+            if isinstance(child, nodes.field_list):
+                for field in child:
+                    ty, sg, name = field[0].astext().split(None, 2)
+                    param = addnodes.desc_parameter()
+                    param += addnodes.desc_sig_keyword_type(sg, sg)
+                    param += addnodes.desc_sig_space()
+                    param += addnodes.desc_sig_name(name, name)
+                    if ty == "arg":
+                        params += param
+                    elif ty == "ret":
+                        returns += param
+
+        anno = "signal " if self.signal else "method "
+        signode += addnodes.desc_annotation(anno, anno)
+        signode += addnodes.desc_name(sig, sig)
+        signode += params
+        if not self.signal and "noreply" not in self.options:
+            ret = addnodes.desc_returns()
+            ret += returns
+            signode += ret
+
+        return sig
+
+
+class DBusSignal(DBusMethod):
+    """
+    Implementation of ``dbus:signal``.
+    """
+
+    doc_field_types: List[Field] = [
+        TypedField(
+            "arg",
+            label=_("Arguments"),
+            names=("arg",),
+            rolename="arg",
+            typerolename=None,
+            typenames=("argtype", "type"),
+        ),
+    ]
+    signal = True
+
+    def get_index_text(self, ifacename: str, name: str) -> str:
+        return _("%s() (%s signal)") % (name, ifacename)
+
+
+class DBusProperty(DBusMember):
+    """
+    Implementation of ``dbus:property``.
+    """
+
+    option_spec: OptionSpec = DBusMember.option_spec.copy()
+    option_spec.update(
+        {
+            "type": directives.unchanged,
+            "readonly": directives.flag,
+            "writeonly": directives.flag,
+            "readwrite": directives.flag,
+            "emits-changed": directives.unchanged,
+        }
+    )
+
+    doc_field_types: List[Field] = []
+
+    def get_index_text(self, ifacename: str, name: str) -> str:
+        return _("%s (%s property)") % (name, ifacename)
+
+    def transform_content(self, contentnode: addnodes.desc_content) -> None:
+        fieldlist = nodes.field_list()
+        access = None
+        if "readonly" in self.options:
+            access = _("read-only")
+        if "writeonly" in self.options:
+            access = _("write-only")
+        if "readwrite" in self.options:
+            access = _("read & write")
+        if access:
+            content = nodes.Text(access)
+            fieldname = nodes.field_name("", _("Access"))
+            fieldbody = nodes.field_body("", nodes.paragraph("", "", content))
+            field = nodes.field("", fieldname, fieldbody)
+            fieldlist += field
+        emits = self.options.get("emits-changed", None)
+        if emits:
+            content = nodes.Text(emits)
+            fieldname = nodes.field_name("", _("Emits Changed"))
+            fieldbody = nodes.field_body("", nodes.paragraph("", "", content))
+            field = nodes.field("", fieldname, fieldbody)
+            fieldlist += field
+        if len(fieldlist) > 0:
+            contentnode.insert(0, fieldlist)
+
+    def handle_signature(self, sig: str, signode: desc_signature) -> str:
+        contentnode = addnodes.desc_content()
+        self.state.nested_parse(self.content, self.content_offset, contentnode)
+        ty = self.options.get("type")
+
+        signode += addnodes.desc_annotation("property ", "property ")
+        signode += addnodes.desc_name(sig, sig)
+        signode += addnodes.desc_sig_punctuation("", ":")
+        signode += addnodes.desc_sig_keyword_type(ty, ty)
+        return sig
+
+    def run(self) -> List[Node]:
+        self.name = "dbus:member"
+        return super().run()
+
+
+class DBusXRef(XRefRole):
+    def process_link(self, env, refnode, has_explicit_title, title, target):
+        refnode["dbus:interface"] = env.ref_context.get("dbus:interface")
+        if not has_explicit_title:
+            title = title.lstrip(".")  # only has a meaning for the target
+            target = target.lstrip("~")  # only has a meaning for the title
+            # if the first character is a tilde, don't display the module/class
+            # parts of the contents
+            if title[0:1] == "~":
+                title = title[1:]
+                dot = title.rfind(".")
+                if dot != -1:
+                    title = title[dot + 1 :]
+        # if the first character is a dot, search more specific namespaces first
+        # else search builtins first
+        if target[0:1] == ".":
+            target = target[1:]
+            refnode["refspecific"] = True
+        return title, target
+
+
+class DBusIndex(Index):
+    """
+    Index subclass to provide a D-Bus interfaces index.
+    """
+
+    name = "dbusindex"
+    localname = _("D-Bus Interfaces Index")
+    shortname = _("dbus")
+
+    def generate(
+        self, docnames: Iterable[str] = None
+    ) -> Tuple[List[Tuple[str, List[IndexEntry]]], bool]:
+        content: Dict[str, List[IndexEntry]] = {}
+        # list of prefixes to ignore
+        ignores: List[str] = self.domain.env.config["dbus_index_common_prefix"]
+        ignores = sorted(ignores, key=len, reverse=True)
+
+        ifaces = sorted(
+            [
+                x
+                for x in self.domain.data["objects"].items()
+                if x[1].objtype == "interface"
+            ],
+            key=lambda x: x[0].lower(),
+        )
+        for name, (docname, node_id, _) in ifaces:
+            if docnames and docname not in docnames:
+                continue
+
+            for ignore in ignores:
+                if name.startswith(ignore):
+                    name = name[len(ignore) :]
+                    stripped = ignore
+                    break
+            else:
+                stripped = ""
+
+            entries = content.setdefault(name[0].lower(), [])
+            entries.append(IndexEntry(stripped + name, 0, docname, node_id, "", "", ""))
+
+        # sort by first letter
+        sorted_content = sorted(content.items())
+
+        return sorted_content, False
+
+
+class ObjectEntry(NamedTuple):
+    docname: str
+    node_id: str
+    objtype: str
+
+
+class DBusDomain(Domain):
+    """
+    Implementation of the D-Bus domain.
+    """
+
+    name = "dbus"
+    label = "D-Bus"
+    object_types: Dict[str, ObjType] = {
+        "interface": ObjType(_("interface"), "iface", "obj"),
+        "method": ObjType(_("method"), "meth", "obj"),
+        "signal": ObjType(_("signal"), "sig", "obj"),
+        "property": ObjType(_("property"), "attr", "_prop", "obj"),
+    }
+    directives = {
+        "interface": DBusInterface,
+        "method": DBusMethod,
+        "signal": DBusSignal,
+        "property": DBusProperty,
+    }
+    roles = {
+        "iface": DBusXRef(),
+        "meth": DBusXRef(),
+        "sig": DBusXRef(),
+        "prop": DBusXRef(),
+    }
+    initial_data: Dict[str, Dict[str, Tuple[Any]]] = {
+        "objects": {},  # fullname -> ObjectEntry
+    }
+    indices = [
+        DBusIndex,
+    ]
+
+    @property
+    def objects(self) -> Dict[str, ObjectEntry]:
+        return self.data.setdefault("objects", {})  # fullname -> ObjectEntry
+
+    def note_object(
+        self, name: str, objtype: str, node_id: str, location: Any = None
+    ) -> None:
+        self.objects[name] = ObjectEntry(self.env.docname, node_id, objtype)
+
+    def clear_doc(self, docname: str) -> None:
+        for fullname, obj in list(self.objects.items()):
+            if obj.docname == docname:
+                del self.objects[fullname]
+
+    def find_obj(self, typ: str, name: str) -> Optional[Tuple[str, ObjectEntry]]:
+        # skip parens
+        if name[-2:] == "()":
+            name = name[:-2]
+        if typ in ("meth", "sig", "prop"):
+            try:
+                ifacename, name = name.rsplit(".", 1)
+            except ValueError:
+                pass
+        return self.objects.get(name)
+
+    def resolve_xref(
+        self,
+        env: "BuildEnvironment",
+        fromdocname: str,
+        builder: "Builder",
+        typ: str,
+        target: str,
+        node: pending_xref,
+        contnode: Element,
+    ) -> Optional[Element]:
+        """Resolve the pending_xref *node* with the given *typ* and *target*."""
+        objdef = self.find_obj(typ, target)
+        if objdef:
+            return node_utils.make_refnode(
+                builder, fromdocname, objdef.docname, objdef.node_id, contnode
+            )
+
+    def get_objects(self) -> Iterator[Tuple[str, str, str, str, str, int]]:
+        for refname, obj in self.objects.items():
+            yield (refname, refname, obj.objtype, obj.docname, obj.node_id, 1)
+
+
+def setup(app):
+    app.add_domain(DBusDomain)
+    app.add_config_value("dbus_index_common_prefix", [], "env")

docs/sphinx/dbusparser.py

@@ -0,0 +1,373 @@
+# Based from "GDBus - GLib D-Bus Library":
+#
+# Copyright (C) 2008-2011 Red Hat, Inc.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General
+# Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
+#
+# Author: David Zeuthen <davidz@redhat.com>
+
+import xml.parsers.expat
+
+
+class Annotation:
+    def __init__(self, key, value):
+        self.key = key
+        self.value = value
+        self.annotations = []
+        self.since = ""
+
+
+class Arg:
+    def __init__(self, name, signature):
+        self.name = name
+        self.signature = signature
+        self.annotations = []
+        self.doc_string = ""
+        self.since = ""
+
+
+class Method:
+    def __init__(self, name, h_type_implies_unix_fd=True):
+        self.name = name
+        self.h_type_implies_unix_fd = h_type_implies_unix_fd
+        self.in_args = []
+        self.out_args = []
+        self.annotations = []
+        self.doc_string = ""
+        self.since = ""
+        self.deprecated = False
+        self.unix_fd = False
+
+
+class Signal:
+    def __init__(self, name):
+        self.name = name
+        self.args = []
+        self.annotations = []
+        self.doc_string = ""
+        self.since = ""
+        self.deprecated = False
+
+
+class Property:
+    def __init__(self, name, signature, access):
+        self.name = name
+        self.signature = signature
+        self.access = access
+        self.annotations = []
+        self.arg = Arg("value", self.signature)
+        self.arg.annotations = self.annotations
+        self.readable = False
+        self.writable = False
+        if self.access == "readwrite":
+            self.readable = True
+            self.writable = True
+        elif self.access == "read":
+            self.readable = True
+        elif self.access == "write":
+            self.writable = True
+        else:
+            raise ValueError('Invalid access type "{}"'.format(self.access))
+        self.doc_string = ""
+        self.since = ""
+        self.deprecated = False
+        self.emits_changed_signal = True
+
+
+class Interface:
+    def __init__(self, name):
+        self.name = name
+        self.methods = []
+        self.signals = []
+        self.properties = []
+        self.annotations = []
+        self.doc_string = ""
+        self.doc_string_brief = ""
+        self.since = ""
+        self.deprecated = False
+
+
+class DBusXMLParser:
+    STATE_TOP = "top"
+    STATE_NODE = "node"
+    STATE_INTERFACE = "interface"
+    STATE_METHOD = "method"
+    STATE_SIGNAL = "signal"
+    STATE_PROPERTY = "property"
+    STATE_ARG = "arg"
+    STATE_ANNOTATION = "annotation"
+    STATE_IGNORED = "ignored"
+
+    def __init__(self, xml_data, h_type_implies_unix_fd=True):
+        self._parser = xml.parsers.expat.ParserCreate()
+        self._parser.CommentHandler = self.handle_comment
+        self._parser.CharacterDataHandler = self.handle_char_data
+        self._parser.StartElementHandler = self.handle_start_element
+        self._parser.EndElementHandler = self.handle_end_element
+
+        self.parsed_interfaces = []
+        self._cur_object = None
+
+        self.state = DBusXMLParser.STATE_TOP
+        self.state_stack = []
+        self._cur_object = None
+        self._cur_object_stack = []
+
+        self.doc_comment_last_symbol = ""
+
+        self._h_type_implies_unix_fd = h_type_implies_unix_fd
+
+        self._parser.Parse(xml_data)
+
+    COMMENT_STATE_BEGIN = "begin"
+    COMMENT_STATE_PARAMS = "params"
+    COMMENT_STATE_BODY = "body"
+    COMMENT_STATE_SKIP = "skip"
+
+    def handle_comment(self, data):
+        comment_state = DBusXMLParser.COMMENT_STATE_BEGIN
+        lines = data.split("\n")
+        symbol = ""
+        body = ""
+        in_para = False
+        params = {}
+        for line in lines:
+            orig_line = line
+            line = line.lstrip()
+            if comment_state == DBusXMLParser.COMMENT_STATE_BEGIN:
+                if len(line) > 0:
+                    colon_index = line.find(": ")
+                    if colon_index == -1:
+                        if line.endswith(":"):
+                            symbol = line[0 : len(line) - 1]
+                            comment_state = DBusXMLParser.COMMENT_STATE_PARAMS
+                        else:
+                            comment_state = DBusXMLParser.COMMENT_STATE_SKIP
+                    else:
+                        symbol = line[0:colon_index]
+                        rest_of_line = line[colon_index + 2 :].strip()
+                        if len(rest_of_line) > 0:
+                            body += rest_of_line + "\n"
+                        comment_state = DBusXMLParser.COMMENT_STATE_PARAMS
+            elif comment_state == DBusXMLParser.COMMENT_STATE_PARAMS:
+                if line.startswith("@"):
+                    colon_index = line.find(": ")
+                    if colon_index == -1:
+                        comment_state = DBusXMLParser.COMMENT_STATE_BODY
+                        if not in_para:
+                            in_para = True
+                        body += orig_line + "\n"
+                    else:
+                        param = line[1:colon_index]
+                        docs = line[colon_index + 2 :]
+                        params[param] = docs
+                else:
+                    comment_state = DBusXMLParser.COMMENT_STATE_BODY
+                    if len(line) > 0:
+                        if not in_para:
+                            in_para = True
+                        body += orig_line + "\n"
+            elif comment_state == DBusXMLParser.COMMENT_STATE_BODY:
+                if len(line) > 0:
+                    if not in_para:
+                        in_para = True
+                    body += orig_line + "\n"
+                else:
+                    if in_para:
+                        body += "\n"
+                        in_para = False
+        if in_para:
+            body += "\n"
+
+        if symbol != "":
+            self.doc_comment_last_symbol = symbol
+            self.doc_comment_params = params
+            self.doc_comment_body = body
+
+    def handle_char_data(self, data):
+        # print 'char_data=%s'%data
+        pass
+
+    def handle_start_element(self, name, attrs):
+        old_state = self.state
+        old_cur_object = self._cur_object
+        if self.state == DBusXMLParser.STATE_IGNORED:
+            self.state = DBusXMLParser.STATE_IGNORED
+        elif self.state == DBusXMLParser.STATE_TOP:
+            if name == DBusXMLParser.STATE_NODE:
+                self.state = DBusXMLParser.STATE_NODE
+            else:
+                self.state = DBusXMLParser.STATE_IGNORED
+        elif self.state == DBusXMLParser.STATE_NODE:
+            if name == DBusXMLParser.STATE_INTERFACE:
+                self.state = DBusXMLParser.STATE_INTERFACE
+                iface = Interface(attrs["name"])
+                self._cur_object = iface
+                self.parsed_interfaces.append(iface)
+            elif name == DBusXMLParser.STATE_ANNOTATION:
+                self.state = DBusXMLParser.STATE_ANNOTATION
+                anno = Annotation(attrs["name"], attrs["value"])
+                self._cur_object.annotations.append(anno)
+                self._cur_object = anno
+            else:
+                self.state = DBusXMLParser.STATE_IGNORED
+
+            # assign docs, if any
+            if "name" in attrs and self.doc_comment_last_symbol == attrs["name"]:
+                self._cur_object.doc_string = self.doc_comment_body
+                if "short_description" in self.doc_comment_params:
+                    short_description = self.doc_comment_params["short_description"]
+                    self._cur_object.doc_string_brief = short_description
+                if "since" in self.doc_comment_params:
+                    self._cur_object.since = self.doc_comment_params["since"].strip()
+
+        elif self.state == DBusXMLParser.STATE_INTERFACE:
+            if name == DBusXMLParser.STATE_METHOD:
+                self.state = DBusXMLParser.STATE_METHOD
+                method = Method(
+                    attrs["name"], h_type_implies_unix_fd=self._h_type_implies_unix_fd
+                )
+                self._cur_object.methods.append(method)
+                self._cur_object = method
+            elif name == DBusXMLParser.STATE_SIGNAL:
+                self.state = DBusXMLParser.STATE_SIGNAL
+                signal = Signal(attrs["name"])
+                self._cur_object.signals.append(signal)
+                self._cur_object = signal
+            elif name == DBusXMLParser.STATE_PROPERTY:
+                self.state = DBusXMLParser.STATE_PROPERTY
+                prop = Property(attrs["name"], attrs["type"], attrs["access"])
+                self._cur_object.properties.append(prop)
+                self._cur_object = prop
+            elif name == DBusXMLParser.STATE_ANNOTATION:
+                self.state = DBusXMLParser.STATE_ANNOTATION
+                anno = Annotation(attrs["name"], attrs["value"])
+                self._cur_object.annotations.append(anno)
+                self._cur_object = anno
+            else:
+                self.state = DBusXMLParser.STATE_IGNORED
+
+            # assign docs, if any
+            if "name" in attrs and self.doc_comment_last_symbol == attrs["name"]:
+                self._cur_object.doc_string = self.doc_comment_body
+                if "since" in self.doc_comment_params:
+                    self._cur_object.since = self.doc_comment_params["since"].strip()
+
+        elif self.state == DBusXMLParser.STATE_METHOD:
+            if name == DBusXMLParser.STATE_ARG:
+                self.state = DBusXMLParser.STATE_ARG
+                arg_name = None
+                if "name" in attrs:
+                    arg_name = attrs["name"]
+                arg = Arg(arg_name, attrs["type"])
+                direction = attrs.get("direction", "in")
+                if direction == "in":
+                    self._cur_object.in_args.append(arg)
+                elif direction == "out":
+                    self._cur_object.out_args.append(arg)
+                else:
+                    raise ValueError('Invalid direction "{}"'.format(direction))
+                self._cur_object = arg
+            elif name == DBusXMLParser.STATE_ANNOTATION:
+                self.state = DBusXMLParser.STATE_ANNOTATION
+                anno = Annotation(attrs["name"], attrs["value"])
+                self._cur_object.annotations.append(anno)
+                self._cur_object = anno
+            else:
+                self.state = DBusXMLParser.STATE_IGNORED
+
+            # assign docs, if any
+            if self.doc_comment_last_symbol == old_cur_object.name:
+                if "name" in attrs and attrs["name"] in self.doc_comment_params:
+                    doc_string = self.doc_comment_params[attrs["name"]]
+                    if doc_string is not None:
+                        self._cur_object.doc_string = doc_string
+                    if "since" in self.doc_comment_params:
+                        self._cur_object.since = self.doc_comment_params[
+                            "since"
+                        ].strip()
+
+        elif self.state == DBusXMLParser.STATE_SIGNAL:
+            if name == DBusXMLParser.STATE_ARG:
+                self.state = DBusXMLParser.STATE_ARG
+                arg_name = None
+                if "name" in attrs:
+                    arg_name = attrs["name"]
+                arg = Arg(arg_name, attrs["type"])
+                self._cur_object.args.append(arg)
+                self._cur_object = arg
+            elif name == DBusXMLParser.STATE_ANNOTATION:
+                self.state = DBusXMLParser.STATE_ANNOTATION
+                anno = Annotation(attrs["name"], attrs["value"])
+                self._cur_object.annotations.append(anno)
+                self._cur_object = anno
+            else:
+                self.state = DBusXMLParser.STATE_IGNORED
+
+            # assign docs, if any
+            if self.doc_comment_last_symbol == old_cur_object.name:
+                if "name" in attrs and attrs["name"] in self.doc_comment_params:
+                    doc_string = self.doc_comment_params[attrs["name"]]
+                    if doc_string is not None:
+                        self._cur_object.doc_string = doc_string
+                    if "since" in self.doc_comment_params:
+                        self._cur_object.since = self.doc_comment_params[
+                            "since"
+                        ].strip()
+
+        elif self.state == DBusXMLParser.STATE_PROPERTY:
+            if name == DBusXMLParser.STATE_ANNOTATION:
+                self.state = DBusXMLParser.STATE_ANNOTATION
+                anno = Annotation(attrs["name"], attrs["value"])
+                self._cur_object.annotations.append(anno)
+                self._cur_object = anno
+            else:
+                self.state = DBusXMLParser.STATE_IGNORED
+
+        elif self.state == DBusXMLParser.STATE_ARG:
+            if name == DBusXMLParser.STATE_ANNOTATION:
+                self.state = DBusXMLParser.STATE_ANNOTATION
+                anno = Annotation(attrs["name"], attrs["value"])
+                self._cur_object.annotations.append(anno)
+                self._cur_object = anno
+            else:
+                self.state = DBusXMLParser.STATE_IGNORED
+
+        elif self.state == DBusXMLParser.STATE_ANNOTATION:
+            if name == DBusXMLParser.STATE_ANNOTATION:
+                self.state = DBusXMLParser.STATE_ANNOTATION
+                anno = Annotation(attrs["name"], attrs["value"])
+                self._cur_object.annotations.append(anno)
+                self._cur_object = anno
+            else:
+                self.state = DBusXMLParser.STATE_IGNORED
+
+        else:
+            raise ValueError(
+                'Unhandled state "{}" while entering element with name "{}"'.format(
+                    self.state, name
+                )
+            )
+
+        self.state_stack.append(old_state)
+        self._cur_object_stack.append(old_cur_object)
+
+    def handle_end_element(self, name):
+        self.state = self.state_stack.pop()
+        self._cur_object = self._cur_object_stack.pop()
+
+
+def parse_dbus_xml(xml_data):
+    parser = DBusXMLParser(xml_data, True)
+    return parser.parsed_interfaces

docs/sphinx/fakedbusdoc.py

@@ -0,0 +1,25 @@
+# D-Bus XML documentation extension, compatibility gunk for <sphinx4
+#
+# Copyright (C) 2021, Red Hat Inc.
+#
+# SPDX-License-Identifier: LGPL-2.1-or-later
+#
+# Author: Marc-André Lureau <marcandre.lureau@redhat.com>
+"""dbus-doc is a Sphinx extension that provides documentation from D-Bus XML."""
+
+from sphinx.application import Sphinx
+from sphinx.util.docutils import SphinxDirective
+from typing import Any, Dict
+
+
+class FakeDBusDocDirective(SphinxDirective):
+    has_content = True
+    required_arguments = 1
+
+    def run(self):
+        return []
+
+
+def setup(app: Sphinx) -> Dict[str, Any]:
+    """Register a fake dbus-doc directive with Sphinx"""
+    app.add_directive("dbus-doc", FakeDBusDocDirective)

hw/display/qxl.c

@@ -2171,12 +2171,17 @@ static void qxl_realize_common(PCIQXLDevice *qxl, Error **errp)
     }
 
 #if SPICE_SERVER_VERSION >= 0x000e02 /* release 0.14.2 */
+    Error *err = NULL;
     char device_address[256] = "";
-    if (qemu_spice_fill_device_address(qxl->vga.con, device_address, 256)) {
+    if (qemu_console_fill_device_address(qxl->vga.con,
+                                         device_address, sizeof(device_address),
+                                         &err)) {
         spice_qxl_set_device_info(&qxl->ssd.qxl,
                                   device_address,
                                   0,
                                   qxl->max_outputs);
+    } else {
+        error_report_err(err);
     }
 #endif
 

hw/display/vhost-user-gpu.c

@@ -254,8 +254,8 @@ vhost_user_gpu_handle_display(VhostUserGPU *g, VhostUserGpuMsg *msg)
             vhost_user_gpu_unblock(g);
             break;
         }
-        dpy_gl_update(con, m->x, m->y, m->width, m->height);
         g->backend_blocked = true;
+        dpy_gl_update(con, m->x, m->y, m->width, m->height);
         break;
     }
     case VHOST_USER_GPU_UPDATE: {

hw/display/virtio-gpu-base.c

@@ -117,6 +117,10 @@ virtio_gpu_gl_block(void *opaque, bool block)
         g->renderer_blocked--;
     }
     assert(g->renderer_blocked >= 0);
+
+    if (!block && g->renderer_blocked == 0) {
+        virtio_gpu_gl_flushed(g);
+    }
 }
 
 static int
@@ -143,7 +147,6 @@ static const GraphicHwOps virtio_gpu_ops = {
     .text_update = virtio_gpu_text_update,
     .ui_info = virtio_gpu_ui_info,
     .gl_block = virtio_gpu_gl_block,
-    .gl_flushed = virtio_gpu_gl_flushed,
 };
 
 bool

hw/display/virtio-gpu-virgl.c

@@ -175,7 +175,7 @@ static void virgl_cmd_set_scanout(VirtIOGPU *g,
         virgl_renderer_force_ctx_0();
         dpy_gl_scanout_texture(
             g->parent_obj.scanout[ss.scanout_id].con, info.tex_id,
-            info.flags & 1 /* FIXME: Y_0_TOP */,
+            info.flags & VIRTIO_GPU_RESOURCE_FLAG_Y_0_TOP,
             info.width, info.height,
             ss.r.x, ss.r.y, ss.r.width, ss.r.height);
     } else {
@@ -609,6 +609,7 @@ int virtio_gpu_virgl_init(VirtIOGPU *g)
 
     ret = virgl_renderer_init(g, 0, &virtio_gpu_3d_cbs);
     if (ret != 0) {
+        error_report("virgl could not be initialized: %d", ret);
         return ret;
     }
 

hw/display/virtio-vga.c

@@ -68,16 +68,6 @@ static void virtio_vga_base_gl_block(void *opaque, bool block)
     }
 }
 
-static void virtio_vga_base_gl_flushed(void *opaque)
-{
-    VirtIOVGABase *vvga = opaque;
-    VirtIOGPUBase *g = vvga->vgpu;
-
-    if (g->hw_ops->gl_flushed) {
-        g->hw_ops->gl_flushed(g);
-    }
-}
-
 static int virtio_vga_base_get_flags(void *opaque)
 {
     VirtIOVGABase *vvga = opaque;
@@ -93,7 +83,6 @@ static const GraphicHwOps virtio_vga_base_ops = {
     .text_update = virtio_vga_base_text_update,
     .ui_info = virtio_vga_base_ui_info,
     .gl_block = virtio_vga_base_gl_block,
-    .gl_flushed = virtio_vga_base_gl_flushed,
 };
 
 static const VMStateDescription vmstate_virtio_vga_base = {

include/chardev/char-socket.h

@@ -0,0 +1,86 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef CHAR_SOCKET_H_
+#define CHAR_SOCKET_H_
+
+#include "io/channel-socket.h"
+#include "io/channel-tls.h"
+#include "io/net-listener.h"
+#include "chardev/char.h"
+#include "qom/object.h"
+
+#define TCP_MAX_FDS 16
+
+typedef struct {
+    char buf[21];
+    size_t buflen;
+} TCPChardevTelnetInit;
+
+typedef enum {
+    TCP_CHARDEV_STATE_DISCONNECTED,
+    TCP_CHARDEV_STATE_CONNECTING,
+    TCP_CHARDEV_STATE_CONNECTED,
+} TCPChardevState;
+
+typedef ChardevClass SocketChardevClass;
+
+struct SocketChardev {
+    Chardev parent;
+    QIOChannel *ioc; /* Client I/O channel */
+    QIOChannelSocket *sioc; /* Client master channel */
+    QIONetListener *listener;
+    GSource *hup_source;
+    QCryptoTLSCreds *tls_creds;
+    char *tls_authz;
+    TCPChardevState state;
+    int max_size;
+    int do_telnetopt;
+    int do_nodelay;
+    int *read_msgfds;
+    size_t read_msgfds_num;
+    int *write_msgfds;
+    size_t write_msgfds_num;
+    bool registered_yank;
+
+    SocketAddress *addr;
+    bool is_listen;
+    bool is_telnet;
+    bool is_tn3270;
+    GSource *telnet_source;
+    TCPChardevTelnetInit *telnet_init;
+
+    bool is_websock;
+
+    GSource *reconnect_timer;
+    int64_t reconnect_time;
+    bool connect_err_reported;
+
+    QIOTask *connect_task;
+};
+typedef struct SocketChardev SocketChardev;
+
+DECLARE_INSTANCE_CHECKER(SocketChardev, SOCKET_CHARDEV,
+                         TYPE_CHARDEV_SOCKET)
+
+#endif /* CHAR_SOCKET_H_ */

include/qemu/cutils.h

@@ -209,4 +209,9 @@ int qemu_pstrcmp0(const char **str1, const char **str2);
  */
 char *get_relocated_path(const char *dir);
 
+static inline const char *yes_no(bool b)
+{
+     return b ? "yes" : "no";
+}
+
 #endif

include/qemu/dbus.h

@@ -12,6 +12,30 @@
 
 #include <gio/gio.h>
 
+#include "qom/object.h"
+#include "chardev/char.h"
+#include "qemu/notify.h"
+#include "qemu/typedefs.h"
+
+/* glib/gio 2.68 */
+#define DBUS_METHOD_INVOCATION_HANDLED TRUE
+#define DBUS_METHOD_INVOCATION_UNHANDLED FALSE
+
+/* in msec */
+#define DBUS_DEFAULT_TIMEOUT 1000
+
+#define DBUS_DISPLAY1_ROOT "/org/qemu/Display1"
+
+#define DBUS_DISPLAY_ERROR (dbus_display_error_quark())
+GQuark dbus_display_error_quark(void);
+
+typedef enum {
+    DBUS_DISPLAY_ERROR_FAILED,
+    DBUS_DISPLAY_ERROR_INVALID,
+    DBUS_DISPLAY_ERROR_UNSUPPORTED,
+    DBUS_DISPLAY_N_ERRORS,
+} DBusDisplayError;
+
 GStrv qemu_dbus_get_queued_owners(GDBusConnection *connection,
                                   const char *name,
                                   Error **errp);

include/qemu/option.h

@@ -150,4 +150,6 @@ QDict *keyval_parse(const char *params, const char *implied_key,
                     bool *help, Error **errp);
 void keyval_merge(QDict *old, const QDict *new, Error **errp);
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(QemuOpts, qemu_opts_del)
+
 #endif

include/ui/clipboard.h

@@ -20,8 +20,10 @@
  */
 
 typedef enum QemuClipboardType QemuClipboardType;
+typedef enum QemuClipboardNotifyType QemuClipboardNotifyType;
 typedef enum QemuClipboardSelection QemuClipboardSelection;
 typedef struct QemuClipboardPeer QemuClipboardPeer;
+typedef struct QemuClipboardNotify QemuClipboardNotify;
 typedef struct QemuClipboardInfo QemuClipboardInfo;
 
 /**
@@ -55,18 +57,46 @@ enum QemuClipboardSelection {
  * struct QemuClipboardPeer
  *
  * @name: peer name.
- * @update: notifier for clipboard updates.
+ * @notifier: notifier for clipboard updates.
  * @request: callback for clipboard data requests.
  *
  * Clipboard peer description.
  */
 struct QemuClipboardPeer {
     const char *name;
-    Notifier update;
+    Notifier notifier;
     void (*request)(QemuClipboardInfo *info,
                     QemuClipboardType type);
 };
 
+/**
+ * enum QemuClipboardNotifyType
+ *
+ * @QEMU_CLIPBOARD_UPDATE_INFO: clipboard info update
+ * @QEMU_CLIPBOARD_RESET_SERIAL: reset clipboard serial
+ *
+ * Clipboard notify type.
+ */
+enum QemuClipboardNotifyType {
+    QEMU_CLIPBOARD_UPDATE_INFO,
+    QEMU_CLIPBOARD_RESET_SERIAL,
+};
+
+/**
+ * struct QemuClipboardNotify
+ *
+ * @type: the type of event.
+ * @info: a QemuClipboardInfo event.
+ *
+ * Clipboard notify data.
+ */
+struct QemuClipboardNotify {
+    QemuClipboardNotifyType type;
+    union {
+        QemuClipboardInfo *info;
+    };
+};
+
 /**
  * struct QemuClipboardInfo
  *
@@ -74,6 +104,8 @@ struct QemuClipboardPeer {
  * @owner: clipboard owner.
  * @selection: clipboard selection.
  * @types: clipboard data array (one entry per type).
+ * @has_serial: whether @serial is available.
+ * @serial: the grab serial counter.
  *
  * Clipboard content data and metadata.
  */
@@ -81,6 +113,8 @@ struct QemuClipboardInfo {
     uint32_t refcount;
     QemuClipboardPeer *owner;
     QemuClipboardSelection selection;
+    bool has_serial;
+    uint32_t serial;
     struct {
         bool available;
         bool requested;
@@ -140,6 +174,16 @@ void qemu_clipboard_peer_release(QemuClipboardPeer *peer,
  */
 QemuClipboardInfo *qemu_clipboard_info(QemuClipboardSelection selection);
 
+/**
+ * qemu_clipboard_check_serial
+ *
+ * @info: clipboard info.
+ * @client: whether to check from the client context and priority.
+ *
+ * Return TRUE if the @info has a higher serial than the current clipboard.
+ */
+bool qemu_clipboard_check_serial(QemuClipboardInfo *info, bool client);
+
 /**
  * qemu_clipboard_info_new
  *
@@ -188,6 +232,13 @@ void qemu_clipboard_info_unref(QemuClipboardInfo *info);
  */
 void qemu_clipboard_update(QemuClipboardInfo *info);
 
+/**
+ * qemu_clipboard_reset_serial
+ *
+ * Reset the clipboard serial.
+ */
+void qemu_clipboard_reset_serial(void);
+
 /**
  * qemu_clipboard_request
  *

include/ui/console.h

@@ -108,6 +108,17 @@ struct QemuConsoleClass {
 #define QEMU_ALLOCATED_FLAG     0x01
 #define QEMU_PLACEHOLDER_FLAG   0x02
 
+typedef struct ScanoutTexture {
+    uint32_t backing_id;
+    bool backing_y_0_top;
+    uint32_t backing_width;
+    uint32_t backing_height;
+    uint32_t x;
+    uint32_t y;
+    uint32_t width;
+    uint32_t height;
+} ScanoutTexture;
+
 typedef struct DisplaySurface {
     pixman_format_code_t format;
     pixman_image_t *image;
@@ -178,7 +189,24 @@ typedef struct QemuDmaBuf {
     bool      draw_submitted;
 } QemuDmaBuf;
 
+enum display_scanout {
+    SCANOUT_NONE,
+    SCANOUT_SURFACE,
+    SCANOUT_TEXTURE,
+    SCANOUT_DMABUF,
+};
+
+typedef struct DisplayScanout {
+    enum display_scanout kind;
+    union {
+        /* DisplaySurface *surface; is kept in QemuConsole */
+        ScanoutTexture texture;
+        QemuDmaBuf *dmabuf;
+    };
+} DisplayScanout;
+
 typedef struct DisplayState DisplayState;
+typedef struct DisplayGLCtx DisplayGLCtx;
 
 typedef struct DisplayChangeListenerOps {
     const char *dpy_name;
@@ -213,16 +241,6 @@ typedef struct DisplayChangeListenerOps {
     void (*dpy_cursor_define)(DisplayChangeListener *dcl,
                               QEMUCursor *cursor);
 
-    /* required if GL */
-    QEMUGLContext (*dpy_gl_ctx_create)(DisplayChangeListener *dcl,
-                                       QEMUGLParams *params);
-    /* required if GL */
-    void (*dpy_gl_ctx_destroy)(DisplayChangeListener *dcl,
-                               QEMUGLContext ctx);
-    /* required if GL */
-    int (*dpy_gl_ctx_make_current)(DisplayChangeListener *dcl,
-                                   QEMUGLContext ctx);
-
     /* required if GL */
     void (*dpy_gl_scanout_disable)(DisplayChangeListener *dcl);
     /* required if GL */
@@ -263,6 +281,26 @@ struct DisplayChangeListener {
     QLIST_ENTRY(DisplayChangeListener) next;
 };
 
+typedef struct DisplayGLCtxOps {
+    /*
+     * We only check if the GLCtx is compatible with a DCL via ops. A natural
+     * evolution of this would be a callback to check some runtime requirements
+     * and allow various DCL kinds.
+     */
+    const DisplayChangeListenerOps *compatible_dcl;
+
+    QEMUGLContext (*dpy_gl_ctx_create)(DisplayGLCtx *dgc,
+                                       QEMUGLParams *params);
+    void (*dpy_gl_ctx_destroy)(DisplayGLCtx *dgc,
+                               QEMUGLContext ctx);
+    int (*dpy_gl_ctx_make_current)(DisplayGLCtx *dgc,
+                                   QEMUGLContext ctx);
+} DisplayGLCtxOps;
+
+struct DisplayGLCtx {
+    const DisplayGLCtxOps *ops;
+};
+
 DisplayState *init_displaystate(void);
 DisplaySurface *qemu_create_displaysurface_from(int width, int height,
                                                 pixman_format_code_t format,
@@ -292,7 +330,7 @@ void unregister_displaychangelistener(DisplayChangeListener *dcl);
 
 bool dpy_ui_info_supported(QemuConsole *con);
 const QemuUIInfo *dpy_get_ui_info(const QemuConsole *con);
-int dpy_set_ui_info(QemuConsole *con, QemuUIInfo *info);
+int dpy_set_ui_info(QemuConsole *con, QemuUIInfo *info, bool delay);
 
 void dpy_gfx_update(QemuConsole *con, int x, int y, int w, int h);
 void dpy_gfx_update_full(QemuConsole *con);
@@ -391,7 +429,6 @@ typedef struct GraphicHwOps {
     void (*update_interval)(void *opaque, uint64_t interval);
     int (*ui_info)(void *opaque, uint32_t head, QemuUIInfo *info);
     void (*gl_block)(void *opaque, bool block);
-    void (*gl_flushed)(void *opaque);
 } GraphicHwOps;
 
 QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
@@ -407,10 +444,11 @@ void graphic_hw_update_done(QemuConsole *con);
 void graphic_hw_invalidate(QemuConsole *con);
 void graphic_hw_text_update(QemuConsole *con, console_ch_t *chardata);
 void graphic_hw_gl_block(QemuConsole *con, bool block);
-void graphic_hw_gl_flushed(QemuConsole *con);
 
 void qemu_console_early_init(void);
 
+void qemu_console_set_display_gl_ctx(QemuConsole *con, DisplayGLCtx *ctx);
+
 QemuConsole *qemu_console_lookup_by_index(unsigned int index);
 QemuConsole *qemu_console_lookup_by_device(DeviceState *dev, uint32_t head);
 QemuConsole *qemu_console_lookup_by_device_name(const char *device_id,
@@ -484,4 +522,10 @@ int index_from_key(const char *key, size_t key_length);
 int udmabuf_fd(void);
 #endif
 
+/* util.c */
+bool qemu_console_fill_device_address(QemuConsole *con,
+                                      char *device_address,
+                                      size_t size,
+                                      Error **errp);
+
 #endif

include/ui/dbus-display.h

@@ -0,0 +1,17 @@
+#ifndef DBUS_DISPLAY_H_
+#define DBUS_DISPLAY_H_
+
+#include "qapi/error.h"
+#include "ui/dbus-module.h"
+
+static inline bool qemu_using_dbus_display(Error **errp)
+{
+    if (!using_dbus_display) {
+        error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
+                  "D-Bus display is not in use");
+        return false;
+    }
+    return true;
+}
+
+#endif /* DBUS_DISPLAY_H_ */

include/ui/dbus-module.h

@@ -0,0 +1,11 @@
+#ifndef DBUS_MODULE_H_
+#define DBUS_MODULE_H_
+
+struct QemuDBusDisplayOps {
+    bool (*add_client)(int csock, Error **errp);
+};
+
+extern int using_dbus_display;
+extern struct QemuDBusDisplayOps qemu_dbus_display;
+
+#endif /* DBUS_MODULE_H_*/

include/ui/egl-context.h

@@ -4,10 +4,10 @@
 #include "ui/console.h"
 #include "ui/egl-helpers.h"
 
-QEMUGLContext qemu_egl_create_context(DisplayChangeListener *dcl,
+QEMUGLContext qemu_egl_create_context(DisplayGLCtx *dgc,
                                       QEMUGLParams *params);
-void qemu_egl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx);
-int qemu_egl_make_context_current(DisplayChangeListener *dcl,
+void qemu_egl_destroy_context(DisplayGLCtx *dgc, QEMUGLContext ctx);
+int qemu_egl_make_context_current(DisplayGLCtx *dgc,
                                   QEMUGLContext ctx);
 
 #endif /* EGL_CONTEXT_H */

include/ui/gtk.h

@@ -35,6 +35,7 @@ typedef struct GtkDisplayState GtkDisplayState;
 
 typedef struct VirtualGfxConsole {
     GtkWidget *drawing_area;
+    DisplayGLCtx dgc;
     DisplayChangeListener dcl;
     QKbdState *kbd;
     DisplaySurface *ds;
@@ -165,7 +166,7 @@ void gd_egl_update(DisplayChangeListener *dcl,
 void gd_egl_refresh(DisplayChangeListener *dcl);
 void gd_egl_switch(DisplayChangeListener *dcl,
                    DisplaySurface *surface);
-QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
+QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
                                     QEMUGLParams *params);
 void gd_egl_scanout_disable(DisplayChangeListener *dcl);
 void gd_egl_scanout_texture(DisplayChangeListener *dcl,
@@ -187,7 +188,7 @@ void gd_egl_flush(DisplayChangeListener *dcl,
 void gd_egl_scanout_flush(DisplayChangeListener *dcl,
                           uint32_t x, uint32_t y, uint32_t w, uint32_t h);
 void gtk_egl_init(DisplayGLMode mode);
-int gd_egl_make_current(DisplayChangeListener *dcl,
+int gd_egl_make_current(DisplayGLCtx *dgc,
                         QEMUGLContext ctx);
 
 /* ui/gtk-gl-area.c */
@@ -198,9 +199,9 @@ void gd_gl_area_update(DisplayChangeListener *dcl,
 void gd_gl_area_refresh(DisplayChangeListener *dcl);
 void gd_gl_area_switch(DisplayChangeListener *dcl,
                        DisplaySurface *surface);
-QEMUGLContext gd_gl_area_create_context(DisplayChangeListener *dcl,
+QEMUGLContext gd_gl_area_create_context(DisplayGLCtx *dgc,
                                         QEMUGLParams *params);
-void gd_gl_area_destroy_context(DisplayChangeListener *dcl,
+void gd_gl_area_destroy_context(DisplayGLCtx *dgc,
                                 QEMUGLContext ctx);
 void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
                                QemuDmaBuf *dmabuf);
@@ -215,7 +216,7 @@ void gd_gl_area_scanout_disable(DisplayChangeListener *dcl);
 void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
                               uint32_t x, uint32_t y, uint32_t w, uint32_t h);
 void gtk_gl_area_init(void);
-int gd_gl_area_make_current(DisplayChangeListener *dcl,
+int gd_gl_area_make_current(DisplayGLCtx *dgc,
                             QEMUGLContext ctx);
 
 /* gtk-clipboard.c */

include/ui/sdl2.h

@@ -16,6 +16,7 @@
 #endif
 
 struct sdl2_console {
+    DisplayGLCtx dgc;
     DisplayChangeListener dcl;
     DisplaySurface *surface;
     DisplayOptions *opts;
@@ -65,10 +66,10 @@ void sdl2_gl_switch(DisplayChangeListener *dcl,
 void sdl2_gl_refresh(DisplayChangeListener *dcl);
 void sdl2_gl_redraw(struct sdl2_console *scon);
 
-QEMUGLContext sdl2_gl_create_context(DisplayChangeListener *dcl,
+QEMUGLContext sdl2_gl_create_context(DisplayGLCtx *dgc,
                                      QEMUGLParams *params);
-void sdl2_gl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx);
-int sdl2_gl_make_context_current(DisplayChangeListener *dcl,
+void sdl2_gl_destroy_context(DisplayGLCtx *dgc, QEMUGLContext ctx);
+int sdl2_gl_make_context_current(DisplayGLCtx *dgc,
                                  QEMUGLContext ctx);
 
 void sdl2_gl_scanout_disable(DisplayChangeListener *dcl);

include/ui/spice-display.h

@@ -86,6 +86,7 @@ typedef struct SimpleSpiceCursor SimpleSpiceCursor;
 
 struct SimpleSpiceDisplay {
     DisplaySurface *ds;
+    DisplayGLCtx dgc;
     DisplayChangeListener dcl;
     void *buf;
     int bufsize;
@@ -183,8 +184,4 @@ void qemu_spice_display_start(void);
 void qemu_spice_display_stop(void);
 int qemu_spice_display_is_running(SimpleSpiceDisplay *ssd);
 
-bool qemu_spice_fill_device_address(QemuConsole *con,
-                                    char *device_address,
-                                    size_t size);
-
 #endif

meson.build

@@ -404,14 +404,16 @@ endif
 add_project_arguments(config_host['GLIB_CFLAGS'].split(),
                       native: false, language: ['c', 'cpp', 'objc'])
 glib = declare_dependency(compile_args: config_host['GLIB_CFLAGS'].split(),
-                          link_args: config_host['GLIB_LIBS'].split())
+                          link_args: config_host['GLIB_LIBS'].split(),
+                          version: config_host['GLIB_VERSION'])
 # override glib dep with the configure results (for subprojects)
 meson.override_dependency('glib-2.0', glib)
 
 gio = not_found
 if 'CONFIG_GIO' in config_host
   gio = declare_dependency(compile_args: config_host['GIO_CFLAGS'].split(),
-                           link_args: config_host['GIO_LIBS'].split())
+                           link_args: config_host['GIO_LIBS'].split(),
+                           version: config_host['GLIB_VERSION'])
 endif
 lttng = not_found
 if 'ust' in get_option('trace_backends')
@@ -1395,6 +1397,15 @@ endif
 have_host_block_device = (targetos != 'darwin' or
     cc.has_header('IOKit/storage/IOMedia.h'))
 
+dbus_display = false
+if not get_option('dbus_display').disabled()
+  # FIXME enable_modules shouldn't be necessary, but: https://github.com/mesonbuild/meson/issues/8333
+  dbus_display = gio.version().version_compare('>=2.64') and config_host.has_key('GDBUS_CODEGEN') and enable_modules
+  if get_option('dbus_display').enabled() and not dbus_display
+    error('Requirements missing to enable -display dbus (glib>=2.64 && --enable-modules)')
+  endif
+endif
+
 have_virtfs = (targetos == 'linux' and
     have_system and
     libattr.found() and
@@ -1497,8 +1508,14 @@ config_host_data.set('CONFIG_ZSTD', zstd.found())
 config_host_data.set('CONFIG_FUSE', fuse.found())
 config_host_data.set('CONFIG_FUSE_LSEEK', fuse_lseek.found())
 config_host_data.set('CONFIG_SPICE_PROTOCOL', spice_protocol.found())
+if spice_protocol.found()
+config_host_data.set('CONFIG_SPICE_PROTOCOL_MAJOR', spice_protocol.version().split('.')[0])
+config_host_data.set('CONFIG_SPICE_PROTOCOL_MINOR', spice_protocol.version().split('.')[1])
+config_host_data.set('CONFIG_SPICE_PROTOCOL_MICRO', spice_protocol.version().split('.')[2])
+endif
 config_host_data.set('CONFIG_SPICE', spice.found())
 config_host_data.set('CONFIG_X11', x11.found())
+config_host_data.set('CONFIG_DBUS_DISPLAY', dbus_display)
 config_host_data.set('CONFIG_CFI', get_option('cfi'))
 config_host_data.set('CONFIG_SELINUX', selinux.found())
 config_host_data.set('QEMU_VERSION', '"@0@"'.format(meson.project_version()))
@@ -3222,6 +3239,7 @@ summary_info += {'Trace backends':    ','.join(get_option('trace_backends'))}
 if 'simple' in get_option('trace_backends')
   summary_info += {'Trace output file': get_option('trace_file') + '-<pid>'}
 endif
+summary_info += {'D-Bus display':     dbus_display}
 summary_info += {'QOM debugging':     config_host.has_key('CONFIG_QOM_CAST_DEBUG')}
 summary_info += {'vhost-kernel support': config_host.has_key('CONFIG_VHOST_KERNEL')}
 summary_info += {'vhost-net support': config_host.has_key('CONFIG_VHOST_NET')}

meson_options.txt

@@ -66,6 +66,8 @@ option('cfi_debug', type: 'boolean', value: 'false',
        description: 'Verbose errors in case of CFI violation')
 option('multiprocess', type: 'feature', value: 'auto',
        description: 'Out of process device emulation support')
+option('dbus_display', type: 'feature', value: 'auto',
+       description: '-display dbus support')
 
 option('attr', type : 'feature', value : 'auto',
        description: 'attr/xattr support')

monitor/qmp-cmds.c

@@ -24,6 +24,7 @@
 #include "chardev/char.h"
 #include "ui/qemu-spice.h"
 #include "ui/console.h"
+#include "ui/dbus-display.h"
 #include "sysemu/kvm.h"
 #include "sysemu/runstate.h"
 #include "sysemu/runstate-action.h"
@@ -285,6 +286,18 @@ void qmp_add_client(const char *protocol, const char *fdname,
         skipauth = has_skipauth ? skipauth : false;
         vnc_display_add_client(NULL, fd, skipauth);
         return;
+#endif
+#ifdef CONFIG_DBUS_DISPLAY
+    } else if (strcmp(protocol, "@dbus-display") == 0) {
+        if (!qemu_using_dbus_display(errp)) {
+            close(fd);
+            return;
+        }
+        if (!qemu_dbus_display.add_client(fd, errp)) {
+            close(fd);
+            return;
+        }
+        return;
 #endif
     } else if ((s = qemu_chr_find(protocol)) != NULL) {
         if (qemu_chr_add_client(s, fd) < 0) {

qapi/audio.json

@@ -386,7 +386,7 @@
 # Since: 4.0
 ##
 { 'enum': 'AudiodevDriver',
-  'data': [ 'none', 'alsa', 'coreaudio', 'dsound', 'jack', 'oss', 'pa',
+  'data': [ 'none', 'alsa', 'coreaudio', 'dbus', 'dsound', 'jack', 'oss', 'pa',
             'sdl', 'spice', 'wav' ] }
 
 ##
@@ -412,6 +412,7 @@
     'none':      'AudiodevGenericOptions',
     'alsa':      'AudiodevAlsaOptions',
     'coreaudio': 'AudiodevCoreaudioOptions',
+    'dbus':      'AudiodevGenericOptions',
     'dsound':    'AudiodevDsoundOptions',
     'jack':      'AudiodevJackOptions',
     'oss':       'AudiodevOssOptions',

qapi/char.json

@@ -358,6 +358,20 @@
   'base': 'ChardevCommon',
   'if': 'CONFIG_SPICE' }
 
+##
+# @ChardevDBus:
+#
+# Configuration info for DBus chardevs.
+#
+# @name: name of the channel (following docs/spice-port-fqdn.txt)
+#
+# Since: 7.0
+##
+{ 'struct': 'ChardevDBus',
+  'data': { 'name': 'str' },
+  'base': 'ChardevCommon',
+  'if': 'CONFIG_DBUS_DISPLAY' }
+
 ##
 # @ChardevVC:
 #
@@ -422,6 +436,7 @@
 # @spicevmc: Since 1.5
 # @spiceport: Since 1.5
 # @qemu-vdagent: Since 6.1
+# @dbus: Since 7.0
 # @vc: v1.5
 # @ringbuf: Since 1.6
 # @memory: Since 1.5
@@ -447,6 +462,7 @@
             { 'name': 'spicevmc', 'if': 'CONFIG_SPICE' },
             { 'name': 'spiceport', 'if': 'CONFIG_SPICE' },
             { 'name': 'qemu-vdagent', 'if': 'CONFIG_SPICE_PROTOCOL' },
+            { 'name': 'dbus', 'if': 'CONFIG_DBUS_DISPLAY' },
             'vc',
             'ringbuf',
             # next one is just for compatibility
@@ -535,6 +551,15 @@
   'data': { 'data': 'ChardevQemuVDAgent' },
   'if': 'CONFIG_SPICE_PROTOCOL' }
 
+##
+# @ChardevDBusWrapper:
+#
+# Since: 7.0
+##
+{ 'struct': 'ChardevDBusWrapper',
+  'data': { 'data': 'ChardevDBus' },
+  'if': 'CONFIG_DBUS_DISPLAY' }
+
 ##
 # @ChardevVCWrapper:
 #
@@ -582,6 +607,8 @@
                            'if': 'CONFIG_SPICE' },
             'qemu-vdagent': { 'type': 'ChardevQemuVDAgentWrapper',
                               'if': 'CONFIG_SPICE_PROTOCOL' },
+            'dbus': { 'type': 'ChardevDBusWrapper',
+                      'if': 'CONFIG_DBUS_DISPLAY' },
             'vc': 'ChardevVCWrapper',
             'ringbuf': 'ChardevRingbufWrapper',
             # next one is just for compatibility

qapi/misc.json

@@ -14,8 +14,8 @@
 # Allow client connections for VNC, Spice and socket based
 # character devices to be passed in to QEMU via SCM_RIGHTS.
 #
-# @protocol: protocol name. Valid names are "vnc", "spice" or the
-#            name of a character device (eg. from -chardev id=XXXX)
+# @protocol: protocol name. Valid names are "vnc", "spice", "@dbus-display" or
+#            the name of a character device (eg. from -chardev id=XXXX)
 #
 # @fdname: file descriptor name previously passed via 'getfd' command
 #

qapi/ui.json

@@ -1121,6 +1121,30 @@
 { 'struct'  : 'DisplayEGLHeadless',
   'data'    : { '*rendernode' : 'str' } }
 
+##
+# @DisplayDBus:
+#
+# DBus display options.
+#
+# @addr: The D-Bus bus address (default to the session bus).
+#
+# @rendernode: Which DRM render node should be used. Default is the first
+#              available node on the host.
+#
+# @p2p: Whether to use peer-to-peer connections (accepted through
+#       ``add_client``).
+#
+# @audiodev: Use the specified DBus audiodev to export audio.
+#
+# Since: 7.0
+#
+##
+{ 'struct'  : 'DisplayDBus',
+  'data'    : { '*rendernode' : 'str',
+                '*addr': 'str',
+                '*p2p': 'bool',
+                '*audiodev': 'str' } }
+
  ##
  # @DisplayGLMode:
  #
@@ -1186,6 +1210,8 @@
 #             application to connect to it. The server will redirect
 #             the serial console and QEMU monitors. (Since 4.0)
 #
+# @dbus: Start a D-Bus service for the display. (Since 7.0)
+#
 # Since: 2.12
 #
 ##
@@ -1199,7 +1225,10 @@
               'if': { 'all': ['CONFIG_OPENGL', 'CONFIG_GBM'] } },
     { 'name': 'curses', 'if': 'CONFIG_CURSES' },
     { 'name': 'cocoa', 'if': 'CONFIG_COCOA' },
-    { 'name': 'spice-app', 'if': 'CONFIG_SPICE'} ] }
+    { 'name': 'spice-app', 'if': 'CONFIG_SPICE' },
+    { 'name': 'dbus', 'if': 'CONFIG_DBUS_DISPLAY' }
+  ]
+}
 
 ##
 # @DisplayOptions:
@@ -1227,7 +1256,8 @@
       'gtk': { 'type': 'DisplayGTK', 'if': 'CONFIG_GTK' },
       'curses': { 'type': 'DisplayCurses', 'if': 'CONFIG_CURSES' },
       'egl-headless': { 'type': 'DisplayEGLHeadless',
-                        'if': { 'all': ['CONFIG_OPENGL', 'CONFIG_GBM'] } }
+                        'if': { 'all': ['CONFIG_OPENGL', 'CONFIG_GBM'] } },
+      'dbus': { 'type': 'DisplayDBus', 'if': 'CONFIG_DBUS_DISPLAY' }
   }
 }
 

qemu-options.hx

@@ -659,6 +659,9 @@ DEF("audiodev", HAS_ARG, QEMU_OPTION_audiodev,
 #endif
 #ifdef CONFIG_SPICE
     "-audiodev spice,id=id[,prop[=value][,...]]\n"
+#endif
+#ifdef CONFIG_DBUS_DISPLAY
+    "-audiodev dbus,id=id[,prop[=value][,...]]\n"
 #endif
     "-audiodev wav,id=id[,prop[=value][,...]]\n"
     "                path= path of wav file to record\n",
@@ -1862,6 +1865,10 @@ DEF("display", HAS_ARG, QEMU_OPTION_display,
 #endif
 #if defined(CONFIG_OPENGL)
     "-display egl-headless[,rendernode=<file>]\n"
+#endif
+#if defined(CONFIG_DBUS_DISPLAY)
+    "-display dbus[,addr=<dbusaddr>]\n"
+    "             [,gl=on|core|es|off][,rendernode=<file>]\n"
 #endif
     "-display none\n"
     "                select display backend type\n"
@@ -1889,6 +1896,19 @@ SRST
         application. The Spice server will redirect the serial consoles
         and QEMU monitors. (Since 4.0)
 
+    ``dbus``
+        Export the display over D-Bus interfaces. (Since 7.0)
+
+        The connection is registered with the "org.qemu" name (and queued when
+        already owned).
+
+        ``addr=<dbusaddr>`` : D-Bus bus address to connect to.
+
+        ``p2p=yes|no`` : Use peer-to-peer connection, accepted via QMP ``add_client``.
+
+        ``gl=on|off|core|es`` : Use OpenGL for rendering (the D-Bus interface
+        will share framebuffers with DMABUF file descriptors).
+
     ``sdl``
         Display video output via SDL (usually in a separate graphics
         window; see the SDL documentation for other possibilities).

scripts/meson-buildoptions.sh

@@ -33,6 +33,7 @@ meson_options_help() {
   printf "%s\n" '  coreaudio       CoreAudio sound support'
   printf "%s\n" '  curl            CURL block device driver'
   printf "%s\n" '  curses          curses UI'
+  printf "%s\n" '  dbus-display    -display dbus support'
   printf "%s\n" '  docs            Documentations build support'
   printf "%s\n" '  dsound          DirectSound sound support'
   printf "%s\n" '  fuse            FUSE block device export'
@@ -131,6 +132,8 @@ _meson_option_parse() {
     --disable-curl) printf "%s" -Dcurl=disabled ;;
     --enable-curses) printf "%s" -Dcurses=enabled ;;
     --disable-curses) printf "%s" -Dcurses=disabled ;;
+    --enable-dbus-display) printf "%s" -Ddbus_display=enabled ;;
+    --disable-dbus-display) printf "%s" -Ddbus_display=disabled ;;
     --enable-docs) printf "%s" -Ddocs=enabled ;;
     --disable-docs) printf "%s" -Ddocs=disabled ;;
     --enable-dsound) printf "%s" -Ddsound=enabled ;;

scripts/modinfo-collect.py

@@ -51,6 +51,9 @@ def main(args):
     with open('compile_commands.json') as f:
         compile_commands = json.load(f)
     for src in args:
+        if not src.endswith('.c'):
+            print("MODINFO_DEBUG skip %s" % src)
+            continue
         print("MODINFO_DEBUG src %s" % src)
         command = find_command(src, target, compile_commands)
         cmdline = process_command(src, command)

tests/qtest/dbus-display-test.c

@@ -0,0 +1,257 @@
+#include "qemu/osdep.h"
+#include "qemu/dbus.h"
+#include <gio/gio.h>
+#include <gio/gunixfdlist.h>
+#include "libqos/libqtest.h"
+#include "qemu-common.h"
+#include "dbus-display1.h"
+
+static GDBusConnection*
+test_dbus_p2p_from_fd(int fd)
+{
+    g_autoptr(GError) err = NULL;
+    g_autoptr(GSocket) socket = NULL;
+    g_autoptr(GSocketConnection) socketc = NULL;
+    GDBusConnection *conn;
+
+    socket = g_socket_new_from_fd(fd, &err);
+    g_assert_no_error(err);
+
+    socketc = g_socket_connection_factory_create_connection(socket);
+    g_assert(socketc != NULL);
+
+    conn = g_dbus_connection_new_sync(
+        G_IO_STREAM(socketc), NULL,
+        G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT |
+        G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING,
+        NULL, NULL, &err);
+    g_assert_no_error(err);
+
+    return conn;
+}
+
+static void
+test_setup(QTestState **qts, GDBusConnection **conn)
+{
+    int pair[2];
+
+    *qts = qtest_init("-display dbus,p2p=yes -name dbus-test");
+
+    g_assert_cmpint(socketpair(AF_UNIX, SOCK_STREAM, 0, pair), ==, 0);
+
+    qtest_qmp_add_client(*qts, "@dbus-display", pair[1]);
+
+    *conn = test_dbus_p2p_from_fd(pair[0]);
+    g_dbus_connection_start_message_processing(*conn);
+}
+
+static void
+test_dbus_display_vm(void)
+{
+    g_autoptr(GError) err = NULL;
+    g_autoptr(GDBusConnection) conn = NULL;
+    g_autoptr(QemuDBusDisplay1VMProxy) vm = NULL;
+    QTestState *qts = NULL;
+
+    test_setup(&qts, &conn);
+
+    vm = QEMU_DBUS_DISPLAY1_VM_PROXY(
+        qemu_dbus_display1_vm_proxy_new_sync(
+            conn,
+            G_DBUS_PROXY_FLAGS_NONE,
+            NULL,
+            DBUS_DISPLAY1_ROOT "/VM",
+            NULL,
+            &err));
+    g_assert_no_error(err);
+
+    g_assert_cmpstr(
+        qemu_dbus_display1_vm_get_name(QEMU_DBUS_DISPLAY1_VM(vm)),
+        ==,
+        "dbus-test");
+    qtest_quit(qts);
+}
+
+typedef struct TestDBusConsoleRegister {
+    GMainLoop *loop;
+    GThread *thread;
+    GDBusConnection *listener_conn;
+    GDBusObjectManagerServer *server;
+} TestDBusConsoleRegister;
+
+static gboolean listener_handle_scanout(
+    QemuDBusDisplay1Listener *object,
+    GDBusMethodInvocation *invocation,
+    guint arg_width,
+    guint arg_height,
+    guint arg_stride,
+    guint arg_pixman_format,
+    GVariant *arg_data,
+    TestDBusConsoleRegister *test)
+{
+    g_main_loop_quit(test->loop);
+
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static void
+test_dbus_console_setup_listener(TestDBusConsoleRegister *test)
+{
+    g_autoptr(GDBusObjectSkeleton) listener = NULL;
+    g_autoptr(QemuDBusDisplay1ListenerSkeleton) iface = NULL;
+
+    test->server = g_dbus_object_manager_server_new(DBUS_DISPLAY1_ROOT);
+    listener = g_dbus_object_skeleton_new(DBUS_DISPLAY1_ROOT "/Listener");
+    iface = QEMU_DBUS_DISPLAY1_LISTENER_SKELETON(
+        qemu_dbus_display1_listener_skeleton_new());
+    g_object_connect(iface,
+                     "signal::handle-scanout", listener_handle_scanout, test,
+                     NULL);
+    g_dbus_object_skeleton_add_interface(listener,
+                                         G_DBUS_INTERFACE_SKELETON(iface));
+    g_dbus_object_manager_server_export(test->server, listener);
+    g_dbus_object_manager_server_set_connection(test->server,
+                                                test->listener_conn);
+
+    g_dbus_connection_start_message_processing(test->listener_conn);
+}
+
+static void
+test_dbus_console_registered(GObject *source_object,
+                             GAsyncResult *res,
+                             gpointer user_data)
+{
+    TestDBusConsoleRegister *test = user_data;
+    g_autoptr(GError) err = NULL;
+
+    qemu_dbus_display1_console_call_register_listener_finish(
+        QEMU_DBUS_DISPLAY1_CONSOLE(source_object),
+        NULL, res, &err);
+    g_assert_no_error(err);
+
+    test->listener_conn = g_thread_join(test->thread);
+    test_dbus_console_setup_listener(test);
+}
+
+static gpointer
+test_dbus_p2p_server_setup_thread(gpointer data)
+{
+    return test_dbus_p2p_from_fd(GPOINTER_TO_INT(data));
+}
+
+static void
+test_dbus_display_console(void)
+{
+    g_autoptr(GError) err = NULL;
+    g_autoptr(GDBusConnection) conn = NULL;
+    g_autoptr(QemuDBusDisplay1ConsoleProxy) console = NULL;
+    g_autoptr(GUnixFDList) fd_list = NULL;
+    g_autoptr(GMainLoop) loop = NULL;
+    QTestState *qts = NULL;
+    int pair[2], idx;
+    TestDBusConsoleRegister test;
+
+    test_setup(&qts, &conn);
+
+    g_assert_cmpint(socketpair(AF_UNIX, SOCK_STREAM, 0, pair), ==, 0);
+    fd_list = g_unix_fd_list_new();
+    idx = g_unix_fd_list_append(fd_list, pair[1], NULL);
+
+    console = QEMU_DBUS_DISPLAY1_CONSOLE_PROXY(
+        qemu_dbus_display1_console_proxy_new_sync(
+            conn,
+            G_DBUS_PROXY_FLAGS_NONE,
+            NULL,
+            "/org/qemu/Display1/Console_0",
+            NULL,
+            &err));
+    g_assert_no_error(err);
+
+    test.loop = loop = g_main_loop_new(NULL, FALSE);
+    test.thread = g_thread_new(NULL, test_dbus_p2p_server_setup_thread,
+                               GINT_TO_POINTER(pair[0]));
+
+    qemu_dbus_display1_console_call_register_listener(
+        QEMU_DBUS_DISPLAY1_CONSOLE(console),
+        g_variant_new_handle(idx),
+        G_DBUS_CALL_FLAGS_NONE,
+        -1,
+        fd_list,
+        NULL,
+        test_dbus_console_registered,
+        &test);
+
+    g_main_loop_run(loop);
+
+    g_clear_object(&test.server);
+    g_clear_object(&test.listener_conn);
+    qtest_quit(qts);
+}
+
+static void
+test_dbus_display_keyboard(void)
+{
+    g_autoptr(GError) err = NULL;
+    g_autoptr(GDBusConnection) conn = NULL;
+    g_autoptr(QemuDBusDisplay1KeyboardProxy) keyboard = NULL;
+    QTestState *qts = NULL;
+
+    test_setup(&qts, &conn);
+
+    keyboard = QEMU_DBUS_DISPLAY1_KEYBOARD_PROXY(
+        qemu_dbus_display1_keyboard_proxy_new_sync(
+            conn,
+            G_DBUS_PROXY_FLAGS_NONE,
+            NULL,
+            "/org/qemu/Display1/Console_0",
+            NULL,
+            &err));
+    g_assert_no_error(err);
+
+
+    g_assert_cmpint(qtest_inb(qts, 0x64) & 0x1, ==, 0);
+    g_assert_cmpint(qtest_inb(qts, 0x60), ==, 0);
+
+    qemu_dbus_display1_keyboard_call_press_sync(
+        QEMU_DBUS_DISPLAY1_KEYBOARD(keyboard),
+        0x1C, /* qnum enter */
+        G_DBUS_CALL_FLAGS_NONE,
+        -1,
+        NULL,
+        &err);
+    g_assert_no_error(err);
+
+    /* may be should wait for interrupt? */
+    g_assert_cmpint(qtest_inb(qts, 0x64) & 0x1, ==, 1);
+    g_assert_cmpint(qtest_inb(qts, 0x60), ==, 0x5A); /* scan code 2 enter */
+
+    qemu_dbus_display1_keyboard_call_release_sync(
+        QEMU_DBUS_DISPLAY1_KEYBOARD(keyboard),
+        0x1C, /* qnum enter */
+        G_DBUS_CALL_FLAGS_NONE,
+        -1,
+        NULL,
+        &err);
+    g_assert_no_error(err);
+
+    g_assert_cmpint(qtest_inb(qts, 0x64) & 0x1, ==, 1);
+    g_assert_cmpint(qtest_inb(qts, 0x60), ==, 0xF0); /* scan code 2 release */
+    g_assert_cmpint(qtest_inb(qts, 0x60), ==, 0x5A); /* scan code 2 enter */
+
+    g_assert_cmpint(qemu_dbus_display1_keyboard_get_modifiers(
+                        QEMU_DBUS_DISPLAY1_KEYBOARD(keyboard)), ==, 0);
+
+    qtest_quit(qts);
+}
+
+int
+main(int argc, char **argv)
+{
+    g_test_init(&argc, &argv, NULL);
+
+    qtest_add_func("/dbus-display/vm", test_dbus_display_vm);
+    qtest_add_func("/dbus-display/console", test_dbus_display_console);
+    qtest_add_func("/dbus-display/keyboard", test_dbus_display_keyboard);
+
+    return g_test_run();
+}

tests/qtest/dbus-vmstate1.xml

@@ -1,12 +0,0 @@
-<?xml version="1.0"?>
-<node name="/" xmlns:doc="http://www.freedesktop.org/dbus/1.0/doc.dtd">
-  <interface name="org.qemu.VMState1">
-    <property name="Id" type="s" access="read"/>
-    <method name="Load">
-      <arg type="ay" name="data" direction="in"/>
-    </method>
-    <method name="Save">
-      <arg type="ay" name="data" direction="out"/>
-    </method>
-  </interface>
-</node>

tests/qtest/libqos/libqtest.h

@@ -744,6 +744,16 @@ void qtest_qmp_device_add_qdict(QTestState *qts, const char *drv,
 void qtest_qmp_device_add(QTestState *qts, const char *driver, const char *id,
                           const char *fmt, ...) GCC_FMT_ATTR(4, 5);
 
+/**
+ * qtest_qmp_add_client:
+ * @qts: QTestState instance to operate on
+ * @protocol: the protocol to add to
+ * @fd: the client file-descriptor
+ *
+ * Call QMP ``getfd`` followed by ``add_client`` with the given @fd.
+ */
+void qtest_qmp_add_client(QTestState *qts, const char *protocol, int fd);
+
 /**
  * qtest_qmp_device_del:
  * @qts: QTestState instance to operate on

tests/qtest/libqtest.c

@@ -1453,6 +1453,25 @@ void qtest_qmp_device_add(QTestState *qts, const char *driver, const char *id,
     qobject_unref(args);
 }
 
+void qtest_qmp_add_client(QTestState *qts, const char *protocol, int fd)
+{
+    QDict *resp;
+
+    resp = qtest_qmp_fds(qts, &fd, 1, "{'execute': 'getfd',"
+                         "'arguments': {'fdname': 'fdname'}}");
+    g_assert(resp);
+    g_assert(!qdict_haskey(resp, "event")); /* We don't expect any events */
+    g_assert(!qdict_haskey(resp, "error"));
+    qobject_unref(resp);
+
+    resp = qtest_qmp(
+        qts, "{'execute': 'add_client',"
+        "'arguments': {'protocol': %s, 'fdname': 'fdname'}}", protocol);
+    g_assert(resp);
+    g_assert(!qdict_haskey(resp, "event")); /* We don't expect any events */
+    g_assert(!qdict_haskey(resp, "error"));
+    qobject_unref(resp);
+}
 
 /*
  * Generic hot-unplugging test via the device_del QMP command.

tests/qtest/meson.build

@@ -92,13 +92,17 @@ qtests_i386 = \
    'test-x86-cpuid-compat',
    'numa-test']
 
+if dbus_display
+  qtests_i386 += ['dbus-display-test']
+endif
+
 dbus_daemon = find_program('dbus-daemon', required: false)
 if dbus_daemon.found() and config_host.has_key('GDBUS_CODEGEN')
   # Temporarily disabled due to Patchew failures:
   #qtests_i386 += ['dbus-vmstate-test']
   dbus_vmstate1 = custom_target('dbus-vmstate description',
                                 output: ['dbus-vmstate1.h', 'dbus-vmstate1.c'],
-                                input: files('dbus-vmstate1.xml'),
+                                input: meson.source_root() / 'backends/dbus-vmstate1.xml',
                                 command: [config_host['GDBUS_CODEGEN'],
                                           '@INPUT@',
                                           '--interface-prefix', 'org.qemu',
@@ -265,6 +269,10 @@ qtests = {
   'vmgenid-test': files('boot-sector.c', 'acpi-utils.c'),
 }
 
+if dbus_display
+qtests += {'dbus-display-test': [dbus_display1, gio]}
+endif
+
 qtest_executables = {}
 foreach dir : target_dirs
   if not dir.endswith('-softmmu')

ui/clipboard.c

@@ -8,7 +8,7 @@ static QemuClipboardInfo *cbinfo[QEMU_CLIPBOARD_SELECTION__COUNT];
 
 void qemu_clipboard_peer_register(QemuClipboardPeer *peer)
 {
-    notifier_list_add(&clipboard_notifiers, &peer->update);
+    notifier_list_add(&clipboard_notifiers, &peer->notifier);
 }
 
 void qemu_clipboard_peer_unregister(QemuClipboardPeer *peer)
@@ -18,8 +18,7 @@ void qemu_clipboard_peer_unregister(QemuClipboardPeer *peer)
     for (i = 0; i < QEMU_CLIPBOARD_SELECTION__COUNT; i++) {
         qemu_clipboard_peer_release(peer, i);
     }
-
-    notifier_remove(&peer->update);
+    notifier_remove(&peer->notifier);
 }
 
 bool qemu_clipboard_peer_owns(QemuClipboardPeer *peer,
@@ -42,12 +41,32 @@ void qemu_clipboard_peer_release(QemuClipboardPeer *peer,
     }
 }
 
+bool qemu_clipboard_check_serial(QemuClipboardInfo *info, bool client)
+{
+    if (!info->has_serial ||
+        !cbinfo[info->selection] ||
+        !cbinfo[info->selection]->has_serial) {
+        return true;
+    }
+
+    if (client) {
+        return cbinfo[info->selection]->serial >= info->serial;
+    } else {
+        return cbinfo[info->selection]->serial > info->serial;
+    }
+}
+
 void qemu_clipboard_update(QemuClipboardInfo *info)
 {
+    QemuClipboardNotify notify = {
+        .type = QEMU_CLIPBOARD_UPDATE_INFO,
+        .info = info,
+    };
     g_autoptr(QemuClipboardInfo) old = NULL;
+
     assert(info->selection < QEMU_CLIPBOARD_SELECTION__COUNT);
 
-    notifier_list_notify(&clipboard_notifiers, info);
+    notifier_list_notify(&clipboard_notifiers, &notify);
 
     old = cbinfo[info->selection];
     cbinfo[info->selection] = qemu_clipboard_info_ref(info);
@@ -110,6 +129,13 @@ void qemu_clipboard_request(QemuClipboardInfo *info,
     info->owner->request(info, type);
 }
 
+void qemu_clipboard_reset_serial(void)
+{
+    QemuClipboardNotify notify = { .type = QEMU_CLIPBOARD_RESET_SERIAL };
+
+    notifier_list_notify(&clipboard_notifiers, &notify);
+}
+
 void qemu_clipboard_set_data(QemuClipboardPeer *peer,
                              QemuClipboardInfo *info,
                              QemuClipboardType type,

ui/cocoa.m

@@ -552,7 +552,7 @@ QemuCocoaView *cocoaView;
     info.width = frameSize.width;
     info.height = frameSize.height;
 
-    dpy_set_ui_info(dcl.con, &info);
+    dpy_set_ui_info(dcl.con, &info, TRUE);
 }
 
 - (void)viewDidMoveToWindow
@@ -1808,14 +1808,12 @@ static void cocoa_clipboard_request(QemuClipboardInfo *info,
 
 static QemuClipboardPeer cbpeer = {
     .name = "cocoa",
-    .update = { .notify = cocoa_clipboard_notify },
+    .notifier = { .notify = cocoa_clipboard_notify },
     .request = cocoa_clipboard_request
 };
 
-static void cocoa_clipboard_notify(Notifier *notifier, void *data)
+static void cocoa_clipboard_update_info(QemuClipboardInfo *info)
 {
-    QemuClipboardInfo *info = data;
-
     if (info->owner == &cbpeer || info->selection != QEMU_CLIPBOARD_SELECTION_CLIPBOARD) {
         return;
     }
@@ -1831,6 +1829,20 @@ static void cocoa_clipboard_notify(Notifier *notifier, void *data)
     qemu_event_set(&cbevent);
 }
 
+static void cocoa_clipboard_notify(Notifier *notifier, void *data)
+{
+    QemuClipboardNotify *notify = data;
+
+    switch (notify->type) {
+    case QEMU_CLIPBOARD_UPDATE_INFO:
+        cocoa_clipboard_update_info(notify->info);
+        return;
+    case QEMU_CLIPBOARD_RESET_SERIAL:
+        /* ignore */
+        return;
+    }
+}
+
 static void cocoa_clipboard_request(QemuClipboardInfo *info,
                                     QemuClipboardType type)
 {

ui/console.c

@@ -77,9 +77,11 @@ struct QemuConsole {
     console_type_t console_type;
     DisplayState *ds;
     DisplaySurface *surface;
+    DisplayScanout scanout;
     int dcls;
-    DisplayChangeListener *gl;
-    bool gl_block;
+    DisplayGLCtx *gl;
+    int gl_block;
+    QEMUTimer *gl_unblock_timer;
     int window_id;
 
     /* Graphic console state.  */
@@ -145,6 +147,7 @@ static void dpy_refresh(DisplayState *s);
 static DisplayState *get_alloc_displaystate(void);
 static void text_console_update_cursor_timer(void);
 static void text_console_update_cursor(void *opaque);
+static bool displaychangelistener_has_dmabuf(DisplayChangeListener *dcl);
 
 static void gui_update(void *opaque)
 {
@@ -233,22 +236,36 @@ void graphic_hw_update(QemuConsole *con)
     }
 }
 
-void graphic_hw_gl_block(QemuConsole *con, bool block)
+static void graphic_hw_gl_unblock_timer(void *opaque)
 {
-    assert(con != NULL);
-
-    con->gl_block = block;
-    if (con->hw_ops->gl_block) {
-        con->hw_ops->gl_block(con->hw, block);
-    }
+    warn_report("console: no gl-unblock within one second");
 }
 
-void graphic_hw_gl_flushed(QemuConsole *con)
+void graphic_hw_gl_block(QemuConsole *con, bool block)
 {
+    uint64_t timeout;
     assert(con != NULL);
 
-    if (con->hw_ops->gl_flushed) {
-        con->hw_ops->gl_flushed(con->hw);
+    if (block) {
+        con->gl_block++;
+    } else {
+        con->gl_block--;
+    }
+    assert(con->gl_block >= 0);
+    if (!con->hw_ops->gl_block) {
+        return;
+    }
+    if ((block && con->gl_block != 1) || (!block && con->gl_block != 0)) {
+        return;
+    }
+    con->hw_ops->gl_block(con->hw, block);
+
+    if (block) {
+        timeout = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
+        timeout += 1000; /* one sec */
+        timer_mod(con->gl_unblock_timer, timeout);
+    } else {
+        timer_del(con->gl_unblock_timer);
     }
 }
 
@@ -466,6 +483,8 @@ static void text_console_resize(QemuConsole *s)
     TextCell *cells, *c, *c1;
     int w1, x, y, last_width;
 
+    assert(s->scanout.kind == SCANOUT_SURFACE);
+
     last_width = s->width;
     s->width = surface_width(s->surface) / FONT_WIDTH;
     s->height = surface_height(s->surface) / FONT_HEIGHT;
@@ -1037,6 +1056,48 @@ static void console_putchar(QemuConsole *s, int ch)
     }
 }
 
+static void displaychangelistener_display_console(DisplayChangeListener *dcl,
+                                                  QemuConsole *con)
+{
+    static const char nodev[] =
+        "This VM has no graphic display device.";
+    static DisplaySurface *dummy;
+
+    if (!con) {
+        if (!dcl->ops->dpy_gfx_switch) {
+            return;
+        }
+        if (!dummy) {
+            dummy = qemu_create_placeholder_surface(640, 480, nodev);
+        }
+        dcl->ops->dpy_gfx_switch(dcl, dummy);
+        return;
+    }
+
+    if (con->scanout.kind == SCANOUT_DMABUF &&
+        displaychangelistener_has_dmabuf(dcl)) {
+        dcl->ops->dpy_gl_scanout_dmabuf(dcl, con->scanout.dmabuf);
+    } else if (con->scanout.kind == SCANOUT_TEXTURE &&
+               dcl->ops->dpy_gl_scanout_texture) {
+        dcl->ops->dpy_gl_scanout_texture(dcl,
+                                         con->scanout.texture.backing_id,
+                                         con->scanout.texture.backing_y_0_top,
+                                         con->scanout.texture.backing_width,
+                                         con->scanout.texture.backing_height,
+                                         con->scanout.texture.x,
+                                         con->scanout.texture.y,
+                                         con->scanout.texture.width,
+                                         con->scanout.texture.height);
+    } else if (con->scanout.kind == SCANOUT_SURFACE &&
+               dcl->ops->dpy_gfx_switch) {
+        dcl->ops->dpy_gfx_switch(dcl, con->surface);
+    }
+
+    dcl->ops->dpy_gfx_update(dcl, 0, 0,
+                             qemu_console_get_width(con, 0),
+                             qemu_console_get_height(con, 0));
+}
+
 void console_select(unsigned int index)
 {
     DisplayChangeListener *dcl;
@@ -1053,13 +1114,7 @@ void console_select(unsigned int index)
                 if (dcl->con != NULL) {
                     continue;
                 }
-                if (dcl->ops->dpy_gfx_switch) {
-                    dcl->ops->dpy_gfx_switch(dcl, s->surface);
-                }
-            }
-            if (s->surface) {
-                dpy_gfx_update(s, 0, 0, surface_width(s->surface),
-                               surface_height(s->surface));
+                displaychangelistener_display_console(dcl, s);
             }
         }
         if (ds->have_text) {
@@ -1443,24 +1498,36 @@ static bool dpy_compatible_with(QemuConsole *con,
     return true;
 }
 
+void qemu_console_set_display_gl_ctx(QemuConsole *con, DisplayGLCtx *gl)
+{
+    /* display has opengl support */
+    assert(con);
+    if (con->gl) {
+        error_report("The console already has an OpenGL context.");
+        exit(1);
+    }
+    con->gl = gl;
+}
+
+static bool dpy_gl_compatible_with(QemuConsole *con, DisplayChangeListener *dcl)
+{
+    if (!con->gl) {
+        return true;
+    }
+
+    return con->gl->ops->compatible_dcl == dcl->ops;
+}
+
 void register_displaychangelistener(DisplayChangeListener *dcl)
 {
-    static const char nodev[] =
-        "This VM has no graphic display device.";
-    static DisplaySurface *dummy;
     QemuConsole *con;
 
     assert(!dcl->ds);
 
-    if (dcl->ops->dpy_gl_ctx_create) {
-        /* display has opengl support */
-        assert(dcl->con);
-        if (dcl->con->gl) {
-            fprintf(stderr, "can't register two opengl displays (%s, %s)\n",
-                    dcl->ops->dpy_name, dcl->con->gl->ops->dpy_name);
-            exit(1);
-        }
-        dcl->con->gl = dcl;
+    if (dcl->con && !dpy_gl_compatible_with(dcl->con, dcl)) {
+        error_report("Display %s is incompatible with the GL context",
+                     dcl->ops->dpy_name);
+        exit(1);
     }
 
     if (dcl->con) {
@@ -1477,16 +1544,7 @@ void register_displaychangelistener(DisplayChangeListener *dcl)
     } else {
         con = active_console;
     }
-    if (dcl->ops->dpy_gfx_switch) {
-        if (con) {
-            dcl->ops->dpy_gfx_switch(dcl, con->surface);
-        } else {
-            if (!dummy) {
-                dummy = qemu_create_placeholder_surface(640, 480, nodev);
-            }
-            dcl->ops->dpy_gfx_switch(dcl, dummy);
-        }
-    }
+    displaychangelistener_display_console(dcl, con);
     text_console_update_cursor(NULL);
 }
 
@@ -1538,7 +1596,7 @@ const QemuUIInfo *dpy_get_ui_info(const QemuConsole *con)
     return &con->ui_info;
 }
 
-int dpy_set_ui_info(QemuConsole *con, QemuUIInfo *info)
+int dpy_set_ui_info(QemuConsole *con, QemuUIInfo *info, bool delay)
 {
     if (con == NULL) {
         con = active_console;
@@ -1558,7 +1616,8 @@ int dpy_set_ui_info(QemuConsole *con, QemuUIInfo *info)
      * go notify the guest.
      */
     con->ui_info = *info;
-    timer_mod(con->ui_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 1000);
+    timer_mod(con->ui_timer,
+              qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + (delay ? 1000 : 0));
     return 0;
 }
 
@@ -1566,13 +1625,9 @@ void dpy_gfx_update(QemuConsole *con, int x, int y, int w, int h)
 {
     DisplayState *s = con->ds;
     DisplayChangeListener *dcl;
-    int width = w;
-    int height = h;
+    int width = qemu_console_get_width(con, x + w);
+    int height = qemu_console_get_height(con, y + h);
 
-    if (con->surface) {
-        width = surface_width(con->surface);
-        height = surface_height(con->surface);
-    }
     x = MAX(x, 0);
     y = MAX(y, 0);
     x = MIN(x, width);
@@ -1595,12 +1650,10 @@ void dpy_gfx_update(QemuConsole *con, int x, int y, int w, int h)
 
 void dpy_gfx_update_full(QemuConsole *con)
 {
-    if (!con->surface) {
-        return;
-    }
-    dpy_gfx_update(con, 0, 0,
-                   surface_width(con->surface),
-                   surface_height(con->surface));
+    int w = qemu_console_get_width(con, 0);
+    int h = qemu_console_get_height(con, 0);
+
+    dpy_gfx_update(con, 0, 0, w, h);
 }
 
 void dpy_gfx_replace_surface(QemuConsole *con,
@@ -1627,6 +1680,7 @@ void dpy_gfx_replace_surface(QemuConsole *con,
 
     assert(old_surface != surface);
 
+    con->scanout.kind = SCANOUT_SURFACE;
     con->surface = surface;
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (con != (dcl->con ? dcl->con : active_console)) {
@@ -1799,8 +1853,15 @@ int dpy_gl_ctx_make_current(QemuConsole *con, QEMUGLContext ctx)
 
 void dpy_gl_scanout_disable(QemuConsole *con)
 {
-    assert(con->gl);
-    con->gl->ops->dpy_gl_scanout_disable(con->gl);
+    DisplayState *s = con->ds;
+    DisplayChangeListener *dcl;
+
+    if (con->scanout.kind != SCANOUT_SURFACE) {
+        con->scanout.kind = SCANOUT_NONE;
+    }
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        dcl->ops->dpy_gl_scanout_disable(dcl);
+    }
 }
 
 void dpy_gl_scanout_texture(QemuConsole *con,
@@ -1811,56 +1872,88 @@ void dpy_gl_scanout_texture(QemuConsole *con,
                             uint32_t x, uint32_t y,
                             uint32_t width, uint32_t height)
 {
-    assert(con->gl);
-    con->gl->ops->dpy_gl_scanout_texture(con->gl, backing_id,
+    DisplayState *s = con->ds;
+    DisplayChangeListener *dcl;
+
+    con->scanout.kind = SCANOUT_TEXTURE;
+    con->scanout.texture = (ScanoutTexture) {
+        backing_id, backing_y_0_top, backing_width, backing_height,
+        x, y, width, height
+    };
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        dcl->ops->dpy_gl_scanout_texture(dcl, backing_id,
                                          backing_y_0_top,
                                          backing_width, backing_height,
                                          x, y, width, height);
+    }
 }
 
 void dpy_gl_scanout_dmabuf(QemuConsole *con,
                            QemuDmaBuf *dmabuf)
 {
-    assert(con->gl);
-    con->gl->ops->dpy_gl_scanout_dmabuf(con->gl, dmabuf);
+    DisplayState *s = con->ds;
+    DisplayChangeListener *dcl;
+
+    con->scanout.kind = SCANOUT_DMABUF;
+    con->scanout.dmabuf = dmabuf;
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        dcl->ops->dpy_gl_scanout_dmabuf(dcl, dmabuf);
+    }
 }
 
 void dpy_gl_cursor_dmabuf(QemuConsole *con, QemuDmaBuf *dmabuf,
                           bool have_hot, uint32_t hot_x, uint32_t hot_y)
 {
-    assert(con->gl);
+    DisplayState *s = con->ds;
+    DisplayChangeListener *dcl;
 
-    if (con->gl->ops->dpy_gl_cursor_dmabuf) {
-        con->gl->ops->dpy_gl_cursor_dmabuf(con->gl, dmabuf,
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (dcl->ops->dpy_gl_cursor_dmabuf) {
+            dcl->ops->dpy_gl_cursor_dmabuf(dcl, dmabuf,
                                            have_hot, hot_x, hot_y);
+        }
     }
 }
 
 void dpy_gl_cursor_position(QemuConsole *con,
                             uint32_t pos_x, uint32_t pos_y)
 {
-    assert(con->gl);
+    DisplayState *s = con->ds;
+    DisplayChangeListener *dcl;
 
-    if (con->gl->ops->dpy_gl_cursor_position) {
-        con->gl->ops->dpy_gl_cursor_position(con->gl, pos_x, pos_y);
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (dcl->ops->dpy_gl_cursor_position) {
+            dcl->ops->dpy_gl_cursor_position(dcl, pos_x, pos_y);
+        }
     }
 }
 
 void dpy_gl_release_dmabuf(QemuConsole *con,
                           QemuDmaBuf *dmabuf)
 {
-    assert(con->gl);
+    DisplayState *s = con->ds;
+    DisplayChangeListener *dcl;
 
-    if (con->gl->ops->dpy_gl_release_dmabuf) {
-        con->gl->ops->dpy_gl_release_dmabuf(con->gl, dmabuf);
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (dcl->ops->dpy_gl_release_dmabuf) {
+            dcl->ops->dpy_gl_release_dmabuf(dcl, dmabuf);
+        }
     }
 }
 
 void dpy_gl_update(QemuConsole *con,
                    uint32_t x, uint32_t y, uint32_t w, uint32_t h)
 {
+    DisplayState *s = con->ds;
+    DisplayChangeListener *dcl;
+
     assert(con->gl);
-    con->gl->ops->dpy_gl_update(con->gl, x, y, w, h);
+
+    graphic_hw_gl_block(con, true);
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        dcl->ops->dpy_gl_update(dcl, x, y, w, h);
+    }
+    graphic_hw_gl_block(con, false);
 }
 
 /***********************************************************/
@@ -1929,10 +2022,8 @@ QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
     s = qemu_console_lookup_unused();
     if (s) {
         trace_console_gfx_reuse(s->index);
-        if (s->surface) {
-            width = surface_width(s->surface);
-            height = surface_height(s->surface);
-        }
+        width = qemu_console_get_width(s, 0);
+        height = qemu_console_get_height(s, 0);
     } else {
         trace_console_gfx_new();
         s = new_console(ds, GRAPHIC_CONSOLE, head);
@@ -1947,6 +2038,8 @@ QemuConsole *graphic_console_init(DeviceState *dev, uint32_t head,
 
     surface = qemu_create_placeholder_surface(width, height, noinit);
     dpy_gfx_replace_surface(s, surface);
+    s->gl_unblock_timer = timer_new_ms(QEMU_CLOCK_REALTIME,
+                                       graphic_hw_gl_unblock_timer, s);
     return s;
 }
 
@@ -1959,13 +2052,8 @@ void graphic_console_close(QemuConsole *con)
     static const char unplugged[] =
         "Guest display has been unplugged";
     DisplaySurface *surface;
-    int width = 640;
-    int height = 480;
-
-    if (con->surface) {
-        width = surface_width(con->surface);
-        height = surface_height(con->surface);
-    }
+    int width = qemu_console_get_width(con, 640);
+    int height = qemu_console_get_height(con, 480);
 
     trace_console_gfx_close(con->index);
     object_property_set_link(OBJECT(con), "device", NULL, &error_abort);
@@ -2117,7 +2205,19 @@ int qemu_console_get_width(QemuConsole *con, int fallback)
     if (con == NULL) {
         con = active_console;
     }
-    return con ? surface_width(con->surface) : fallback;
+    if (con == NULL) {
+        return fallback;
+    }
+    switch (con->scanout.kind) {
+    case SCANOUT_DMABUF:
+        return con->scanout.dmabuf->width;
+    case SCANOUT_TEXTURE:
+        return con->scanout.texture.width;
+    case SCANOUT_SURFACE:
+        return surface_width(con->surface);
+    default:
+        return fallback;
+    }
 }
 
 int qemu_console_get_height(QemuConsole *con, int fallback)
@@ -2125,7 +2225,19 @@ int qemu_console_get_height(QemuConsole *con, int fallback)
     if (con == NULL) {
         con = active_console;
     }
-    return con ? surface_height(con->surface) : fallback;
+    if (con == NULL) {
+        return fallback;
+    }
+    switch (con->scanout.kind) {
+    case SCANOUT_DMABUF:
+        return con->scanout.dmabuf->height;
+    case SCANOUT_TEXTURE:
+        return con->scanout.texture.height;
+    case SCANOUT_SURFACE:
+        return surface_height(con->surface);
+    default:
+        return fallback;
+    }
 }
 
 static void vc_chr_accept_input(Chardev *chr)
@@ -2191,12 +2303,13 @@ static void text_console_do_init(Chardev *chr, DisplayState *ds)
     s->total_height = DEFAULT_BACKSCROLL;
     s->x = 0;
     s->y = 0;
-    if (!s->surface) {
-        if (active_console && active_console->surface) {
-            g_width = surface_width(active_console->surface);
-            g_height = surface_height(active_console->surface);
+    if (s->scanout.kind != SCANOUT_SURFACE) {
+        if (active_console && active_console->scanout.kind == SCANOUT_SURFACE) {
+            g_width = qemu_console_get_width(active_console, g_width);
+            g_height = qemu_console_get_height(active_console, g_height);
         }
         s->surface = qemu_create_displaysurface(g_width, g_height);
+        s->scanout.kind = SCANOUT_SURFACE;
     }
 
     s->hw_ops = &text_console_ops;
@@ -2255,6 +2368,7 @@ static void vc_chr_open(Chardev *chr,
         s = new_console(NULL, TEXT_CONSOLE, 0);
     } else {
         s = new_console(NULL, TEXT_CONSOLE_FIXED_SIZE, 0);
+        s->scanout.kind = SCANOUT_SURFACE;
         s->surface = qemu_create_displaysurface(width, height);
     }
 
@@ -2278,13 +2392,13 @@ static void vc_chr_open(Chardev *chr,
 
 void qemu_console_resize(QemuConsole *s, int width, int height)
 {
-    DisplaySurface *surface;
+    DisplaySurface *surface = qemu_console_surface(s);
 
     assert(s->console_type == GRAPHIC_CONSOLE);
 
-    if (s->surface && (s->surface->flags & QEMU_ALLOCATED_FLAG) &&
-        pixman_image_get_width(s->surface->image) == width &&
-        pixman_image_get_height(s->surface->image) == height) {
+    if (surface && (surface->flags & QEMU_ALLOCATED_FLAG) &&
+        pixman_image_get_width(surface->image) == width &&
+        pixman_image_get_height(surface->image) == height) {
         return;
     }
 
@@ -2294,7 +2408,12 @@ void qemu_console_resize(QemuConsole *s, int width, int height)
 
 DisplaySurface *qemu_console_surface(QemuConsole *console)
 {
-    return console->surface;
+    switch (console->scanout.kind) {
+    case SCANOUT_SURFACE:
+        return console->surface;
+    default:
+        return NULL;
+    }
 }
 
 PixelFormat qemu_default_pixelformat(int bpp)

ui/dbus-chardev.c

@@ -0,0 +1,296 @@
+/*
+ * QEMU DBus display
+ *
+ * Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "qemu/osdep.h"
+#include "trace.h"
+#include "qapi/error.h"
+#include "qemu/config-file.h"
+#include "qemu/option.h"
+
+#include <gio/gunixfdlist.h>
+
+#include "dbus.h"
+
+static char *
+dbus_display_chardev_path(DBusChardev *chr)
+{
+    return g_strdup_printf(DBUS_DISPLAY1_ROOT "/Chardev_%s",
+                           CHARDEV(chr)->label);
+}
+
+static void
+dbus_display_chardev_export(DBusDisplay *dpy, DBusChardev *chr)
+{
+    g_autoptr(GDBusObjectSkeleton) sk = NULL;
+    g_autofree char *path = dbus_display_chardev_path(chr);
+
+    if (chr->exported) {
+        return;
+    }
+
+    sk = g_dbus_object_skeleton_new(path);
+    g_dbus_object_skeleton_add_interface(
+        sk, G_DBUS_INTERFACE_SKELETON(chr->iface));
+    g_dbus_object_manager_server_export(dpy->server, sk);
+    chr->exported = true;
+}
+
+static void
+dbus_display_chardev_unexport(DBusDisplay *dpy, DBusChardev *chr)
+{
+    g_autofree char *path = dbus_display_chardev_path(chr);
+
+    if (!chr->exported) {
+        return;
+    }
+
+    g_dbus_object_manager_server_unexport(dpy->server, path);
+    chr->exported = false;
+}
+
+static int
+dbus_display_chardev_foreach(Object *obj, void *data)
+{
+    DBusDisplay *dpy = DBUS_DISPLAY(data);
+
+    if (!CHARDEV_IS_DBUS(obj)) {
+        return 0;
+    }
+
+    dbus_display_chardev_export(dpy, DBUS_CHARDEV(obj));
+
+    return 0;
+}
+
+static void
+dbus_display_on_notify(Notifier *notifier, void *data)
+{
+    DBusDisplay *dpy = container_of(notifier, DBusDisplay, notifier);
+    DBusDisplayEvent *event = data;
+
+    switch (event->type) {
+    case DBUS_DISPLAY_CHARDEV_OPEN:
+        dbus_display_chardev_export(dpy, event->chardev);
+        break;
+    case DBUS_DISPLAY_CHARDEV_CLOSE:
+        dbus_display_chardev_unexport(dpy, event->chardev);
+        break;
+    }
+}
+
+void
+dbus_chardev_init(DBusDisplay *dpy)
+{
+    dpy->notifier.notify = dbus_display_on_notify;
+    dbus_display_notifier_add(&dpy->notifier);
+
+    object_child_foreach(container_get(object_get_root(), "/chardevs"),
+                         dbus_display_chardev_foreach, dpy);
+}
+
+static gboolean
+dbus_chr_register(
+    DBusChardev *dc,
+    GDBusMethodInvocation *invocation,
+    GUnixFDList *fd_list,
+    GVariant *arg_stream,
+    QemuDBusDisplay1Chardev *object)
+{
+    g_autoptr(GError) err = NULL;
+    int fd;
+
+    fd = g_unix_fd_list_get(fd_list, g_variant_get_handle(arg_stream), &err);
+    if (err) {
+        g_dbus_method_invocation_return_error(
+            invocation,
+            DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_FAILED,
+            "Couldn't get peer FD: %s", err->message);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    if (qemu_chr_add_client(CHARDEV(dc), fd) < 0) {
+        g_dbus_method_invocation_return_error(invocation,
+                                              DBUS_DISPLAY_ERROR,
+                                              DBUS_DISPLAY_ERROR_FAILED,
+                                              "Couldn't register FD!");
+        close(fd);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    g_object_set(dc->iface,
+                 "owner", g_dbus_method_invocation_get_sender(invocation),
+                 NULL);
+
+    qemu_dbus_display1_chardev_complete_register(object, invocation, NULL);
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static gboolean
+dbus_chr_send_break(
+    DBusChardev *dc,
+    GDBusMethodInvocation *invocation,
+    QemuDBusDisplay1Chardev *object)
+{
+    qemu_chr_be_event(CHARDEV(dc), CHR_EVENT_BREAK);
+
+    qemu_dbus_display1_chardev_complete_send_break(object, invocation);
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static void
+dbus_chr_open(Chardev *chr, ChardevBackend *backend,
+              bool *be_opened, Error **errp)
+{
+    ERRP_GUARD();
+
+    DBusChardev *dc = DBUS_CHARDEV(chr);
+    DBusDisplayEvent event = {
+        .type = DBUS_DISPLAY_CHARDEV_OPEN,
+        .chardev = dc,
+    };
+    g_autoptr(ChardevBackend) be = NULL;
+    g_autoptr(QemuOpts) opts = NULL;
+
+    dc->iface = qemu_dbus_display1_chardev_skeleton_new();
+    g_object_set(dc->iface, "name", backend->u.dbus.data->name, NULL);
+    g_object_connect(dc->iface,
+                     "swapped-signal::handle-register",
+                     dbus_chr_register, dc,
+                     "swapped-signal::handle-send-break",
+                     dbus_chr_send_break, dc,
+                     NULL);
+
+    dbus_display_notify(&event);
+
+    be = g_new0(ChardevBackend, 1);
+    opts = qemu_opts_create(qemu_find_opts("chardev"), NULL, 0, &error_abort);
+    qemu_opt_set(opts, "server", "on", &error_abort);
+    qemu_opt_set(opts, "wait", "off", &error_abort);
+    CHARDEV_CLASS(object_class_by_name(TYPE_CHARDEV_SOCKET))->parse(
+        opts, be, errp);
+    if (*errp) {
+        return;
+    }
+    CHARDEV_CLASS(object_class_by_name(TYPE_CHARDEV_SOCKET))->open(
+        chr, be, be_opened, errp);
+}
+
+static void
+dbus_chr_set_fe_open(Chardev *chr, int fe_open)
+{
+    DBusChardev *dc = DBUS_CHARDEV(chr);
+
+    g_object_set(dc->iface, "feopened", fe_open, NULL);
+}
+
+static void
+dbus_chr_set_echo(Chardev *chr, bool echo)
+{
+    DBusChardev *dc = DBUS_CHARDEV(chr);
+
+    g_object_set(dc->iface, "echo", echo, NULL);
+}
+
+static void
+dbus_chr_be_event(Chardev *chr, QEMUChrEvent event)
+{
+    DBusChardev *dc = DBUS_CHARDEV(chr);
+    DBusChardevClass *klass = DBUS_CHARDEV_GET_CLASS(chr);
+
+    switch (event) {
+    case CHR_EVENT_CLOSED:
+        if (dc->iface) {
+            /* on finalize, iface is set to NULL */
+            g_object_set(dc->iface, "owner", "", NULL);
+        }
+        break;
+    default:
+        break;
+    };
+
+    klass->parent_chr_be_event(chr, event);
+}
+
+static void
+dbus_chr_parse(QemuOpts *opts, ChardevBackend *backend,
+               Error **errp)
+{
+    const char *name = qemu_opt_get(opts, "name");
+    ChardevDBus *dbus;
+
+    if (name == NULL) {
+        error_setg(errp, "chardev: dbus: no name given");
+        return;
+    }
+
+    backend->type = CHARDEV_BACKEND_KIND_DBUS;
+    dbus = backend->u.dbus.data = g_new0(ChardevDBus, 1);
+    qemu_chr_parse_common(opts, qapi_ChardevDBus_base(dbus));
+    dbus->name = g_strdup(name);
+}
+
+static void
+char_dbus_class_init(ObjectClass *oc, void *data)
+{
+    DBusChardevClass *klass = DBUS_CHARDEV_CLASS(oc);
+    ChardevClass *cc = CHARDEV_CLASS(oc);
+
+    cc->parse = dbus_chr_parse;
+    cc->open = dbus_chr_open;
+    cc->chr_set_fe_open = dbus_chr_set_fe_open;
+    cc->chr_set_echo = dbus_chr_set_echo;
+    klass->parent_chr_be_event = cc->chr_be_event;
+    cc->chr_be_event = dbus_chr_be_event;
+}
+
+static void
+char_dbus_finalize(Object *obj)
+{
+    DBusChardev *dc = DBUS_CHARDEV(obj);
+    DBusDisplayEvent event = {
+        .type = DBUS_DISPLAY_CHARDEV_CLOSE,
+        .chardev = dc,
+    };
+
+    dbus_display_notify(&event);
+    g_clear_object(&dc->iface);
+}
+
+static const TypeInfo char_dbus_type_info = {
+    .name = TYPE_CHARDEV_DBUS,
+    .parent = TYPE_CHARDEV_SOCKET,
+    .class_size = sizeof(DBusChardevClass),
+    .instance_size = sizeof(DBusChardev),
+    .instance_finalize = char_dbus_finalize,
+    .class_init = char_dbus_class_init,
+};
+module_obj(TYPE_CHARDEV_DBUS);
+
+static void
+register_types(void)
+{
+    type_register_static(&char_dbus_type_info);
+}
+
+type_init(register_types);

ui/dbus-clipboard.c

@@ -0,0 +1,457 @@
+/*
+ * QEMU DBus display
+ *
+ * Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "qemu/osdep.h"
+#include "qemu/dbus.h"
+#include "qemu/main-loop.h"
+#include "qom/object_interfaces.h"
+#include "sysemu/sysemu.h"
+#include "qapi/error.h"
+#include "trace.h"
+
+#include "dbus.h"
+
+#define MIME_TEXT_PLAIN_UTF8 "text/plain;charset=utf-8"
+
+static void
+dbus_clipboard_complete_request(
+    DBusDisplay *dpy,
+    GDBusMethodInvocation *invocation,
+    QemuClipboardInfo *info,
+    QemuClipboardType type)
+{
+    GVariant *v_data = g_variant_new_from_data(
+        G_VARIANT_TYPE("ay"),
+        info->types[type].data,
+        info->types[type].size,
+        TRUE,
+        (GDestroyNotify)qemu_clipboard_info_unref,
+        qemu_clipboard_info_ref(info));
+
+    qemu_dbus_display1_clipboard_complete_request(
+        dpy->clipboard, invocation,
+        MIME_TEXT_PLAIN_UTF8, v_data);
+}
+
+static void
+dbus_clipboard_update_info(DBusDisplay *dpy, QemuClipboardInfo *info)
+{
+    bool self_update = info->owner == &dpy->clipboard_peer;
+    const char *mime[QEMU_CLIPBOARD_TYPE__COUNT + 1] = { 0, };
+    DBusClipboardRequest *req;
+    int i = 0;
+
+    if (info->owner == NULL) {
+        if (dpy->clipboard_proxy) {
+            qemu_dbus_display1_clipboard_call_release(
+                dpy->clipboard_proxy,
+                info->selection,
+                G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+        }
+        return;
+    }
+
+    if (self_update || !info->has_serial) {
+        return;
+    }
+
+    req = &dpy->clipboard_request[info->selection];
+    if (req->invocation && info->types[req->type].data) {
+        dbus_clipboard_complete_request(dpy, req->invocation, info, req->type);
+        g_clear_object(&req->invocation);
+        g_source_remove(req->timeout_id);
+        req->timeout_id = 0;
+        return;
+    }
+
+    if (info->types[QEMU_CLIPBOARD_TYPE_TEXT].available) {
+        mime[i++] = MIME_TEXT_PLAIN_UTF8;
+    }
+
+    if (i > 0) {
+        if (dpy->clipboard_proxy) {
+            qemu_dbus_display1_clipboard_call_grab(
+                dpy->clipboard_proxy,
+                info->selection,
+                info->serial,
+                mime,
+                G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+        }
+    }
+}
+
+static void
+dbus_clipboard_reset_serial(DBusDisplay *dpy)
+{
+    if (dpy->clipboard_proxy) {
+        qemu_dbus_display1_clipboard_call_register(
+            dpy->clipboard_proxy,
+            G_DBUS_CALL_FLAGS_NONE,
+            -1, NULL, NULL, NULL);
+    }
+}
+
+static void
+dbus_clipboard_notify(Notifier *notifier, void *data)
+{
+    DBusDisplay *dpy =
+        container_of(notifier, DBusDisplay, clipboard_peer.notifier);
+    QemuClipboardNotify *notify = data;
+
+    switch (notify->type) {
+    case QEMU_CLIPBOARD_UPDATE_INFO:
+        dbus_clipboard_update_info(dpy, notify->info);
+        return;
+    case QEMU_CLIPBOARD_RESET_SERIAL:
+        dbus_clipboard_reset_serial(dpy);
+        return;
+    }
+}
+
+static void
+dbus_clipboard_qemu_request(QemuClipboardInfo *info,
+                            QemuClipboardType type)
+{
+    DBusDisplay *dpy = container_of(info->owner, DBusDisplay, clipboard_peer);
+    g_autofree char *mime = NULL;
+    g_autoptr(GVariant) v_data = NULL;
+    g_autoptr(GError) err = NULL;
+    const char *data = NULL;
+    const char *mimes[] = { MIME_TEXT_PLAIN_UTF8, NULL };
+    size_t n;
+
+    if (type != QEMU_CLIPBOARD_TYPE_TEXT) {
+        /* unsupported atm */
+        return;
+    }
+
+    if (dpy->clipboard_proxy) {
+        if (!qemu_dbus_display1_clipboard_call_request_sync(
+                dpy->clipboard_proxy,
+                info->selection,
+                mimes,
+                G_DBUS_CALL_FLAGS_NONE, -1, &mime, &v_data, NULL, &err)) {
+            error_report("Failed to request clipboard: %s", err->message);
+            return;
+        }
+
+        if (g_strcmp0(mime, MIME_TEXT_PLAIN_UTF8)) {
+            error_report("Unsupported returned MIME: %s", mime);
+            return;
+        }
+
+        data = g_variant_get_fixed_array(v_data, &n, 1);
+        qemu_clipboard_set_data(&dpy->clipboard_peer, info, type,
+                                n, data, true);
+    }
+}
+
+static void
+dbus_clipboard_request_cancelled(DBusClipboardRequest *req)
+{
+    if (!req->invocation) {
+        return;
+    }
+
+    g_dbus_method_invocation_return_error(
+        req->invocation,
+        DBUS_DISPLAY_ERROR,
+        DBUS_DISPLAY_ERROR_FAILED,
+        "Cancelled clipboard request");
+
+    g_clear_object(&req->invocation);
+    g_source_remove(req->timeout_id);
+    req->timeout_id = 0;
+}
+
+static void
+dbus_clipboard_unregister_proxy(DBusDisplay *dpy)
+{
+    const char *name = NULL;
+    int i;
+
+    for (i = 0; i < G_N_ELEMENTS(dpy->clipboard_request); ++i) {
+        dbus_clipboard_request_cancelled(&dpy->clipboard_request[i]);
+    }
+
+    if (!dpy->clipboard_proxy) {
+        return;
+    }
+
+    name = g_dbus_proxy_get_name(G_DBUS_PROXY(dpy->clipboard_proxy));
+    trace_dbus_clipboard_unregister(name);
+    g_clear_object(&dpy->clipboard_proxy);
+}
+
+static void
+dbus_on_clipboard_proxy_name_owner_changed(
+    DBusDisplay *dpy,
+    GObject *object,
+    GParamSpec *pspec)
+{
+    dbus_clipboard_unregister_proxy(dpy);
+}
+
+static gboolean
+dbus_clipboard_register(
+    DBusDisplay *dpy,
+    GDBusMethodInvocation *invocation)
+{
+    g_autoptr(GError) err = NULL;
+    const char *name = NULL;
+
+    if (dpy->clipboard_proxy) {
+        g_dbus_method_invocation_return_error(
+            invocation,
+            DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_FAILED,
+            "Clipboard peer already registered!");
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    dpy->clipboard_proxy =
+        qemu_dbus_display1_clipboard_proxy_new_sync(
+            g_dbus_method_invocation_get_connection(invocation),
+            G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START,
+            g_dbus_method_invocation_get_sender(invocation),
+            "/org/qemu/Display1/Clipboard",
+            NULL,
+            &err);
+    if (!dpy->clipboard_proxy) {
+        g_dbus_method_invocation_return_error(
+            invocation,
+            DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_FAILED,
+            "Failed to setup proxy: %s", err->message);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    name = g_dbus_proxy_get_name(G_DBUS_PROXY(dpy->clipboard_proxy));
+    trace_dbus_clipboard_register(name);
+
+    g_object_connect(dpy->clipboard_proxy,
+                     "swapped-signal::notify::g-name-owner",
+                     dbus_on_clipboard_proxy_name_owner_changed, dpy,
+                     NULL);
+    qemu_clipboard_reset_serial();
+
+    qemu_dbus_display1_clipboard_complete_register(dpy->clipboard, invocation);
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static gboolean
+dbus_clipboard_check_caller(DBusDisplay *dpy, GDBusMethodInvocation *invocation)
+{
+    if (!dpy->clipboard_proxy ||
+        g_strcmp0(g_dbus_proxy_get_name(G_DBUS_PROXY(dpy->clipboard_proxy)),
+                  g_dbus_method_invocation_get_sender(invocation))) {
+        g_dbus_method_invocation_return_error(
+            invocation,
+            DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_FAILED,
+            "Unregistered caller");
+        return FALSE;
+    }
+
+    return TRUE;
+}
+
+static gboolean
+dbus_clipboard_unregister(
+    DBusDisplay *dpy,
+    GDBusMethodInvocation *invocation)
+{
+    if (!dbus_clipboard_check_caller(dpy, invocation)) {
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    dbus_clipboard_unregister_proxy(dpy);
+
+    qemu_dbus_display1_clipboard_complete_unregister(
+        dpy->clipboard, invocation);
+
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static gboolean
+dbus_clipboard_grab(
+    DBusDisplay *dpy,
+    GDBusMethodInvocation *invocation,
+    gint arg_selection,
+    guint arg_serial,
+    const gchar *const *arg_mimes)
+{
+    QemuClipboardSelection s = arg_selection;
+    g_autoptr(QemuClipboardInfo) info = NULL;
+
+    if (!dbus_clipboard_check_caller(dpy, invocation)) {
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    if (s >= QEMU_CLIPBOARD_SELECTION__COUNT) {
+        g_dbus_method_invocation_return_error(
+            invocation,
+            DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_FAILED,
+            "Invalid clipboard selection: %d", arg_selection);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    info = qemu_clipboard_info_new(&dpy->clipboard_peer, s);
+    if (g_strv_contains(arg_mimes, MIME_TEXT_PLAIN_UTF8)) {
+        info->types[QEMU_CLIPBOARD_TYPE_TEXT].available = true;
+    }
+    info->serial = arg_serial;
+    info->has_serial = true;
+    if (qemu_clipboard_check_serial(info, true)) {
+        qemu_clipboard_update(info);
+    } else {
+        trace_dbus_clipboard_grab_failed();
+    }
+
+    qemu_dbus_display1_clipboard_complete_grab(dpy->clipboard, invocation);
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static gboolean
+dbus_clipboard_release(
+    DBusDisplay *dpy,
+    GDBusMethodInvocation *invocation,
+    gint arg_selection)
+{
+    if (!dbus_clipboard_check_caller(dpy, invocation)) {
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    qemu_clipboard_peer_release(&dpy->clipboard_peer, arg_selection);
+
+    qemu_dbus_display1_clipboard_complete_release(dpy->clipboard, invocation);
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static gboolean
+dbus_clipboard_request_timeout(gpointer user_data)
+{
+    dbus_clipboard_request_cancelled(user_data);
+    return G_SOURCE_REMOVE;
+}
+
+static gboolean
+dbus_clipboard_request(
+    DBusDisplay *dpy,
+    GDBusMethodInvocation *invocation,
+    gint arg_selection,
+    const gchar *const *arg_mimes)
+{
+    QemuClipboardSelection s = arg_selection;
+    QemuClipboardType type = QEMU_CLIPBOARD_TYPE_TEXT;
+    QemuClipboardInfo *info = NULL;
+
+    if (!dbus_clipboard_check_caller(dpy, invocation)) {
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    if (s >= QEMU_CLIPBOARD_SELECTION__COUNT) {
+        g_dbus_method_invocation_return_error(
+            invocation,
+            DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_FAILED,
+            "Invalid clipboard selection: %d", arg_selection);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    if (dpy->clipboard_request[s].invocation) {
+        g_dbus_method_invocation_return_error(
+            invocation,
+            DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_FAILED,
+            "Pending request");
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    info = qemu_clipboard_info(s);
+    if (!info || !info->owner || info->owner == &dpy->clipboard_peer) {
+        g_dbus_method_invocation_return_error(
+            invocation,
+            DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_FAILED,
+            "Empty clipboard");
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    if (!g_strv_contains(arg_mimes, MIME_TEXT_PLAIN_UTF8) ||
+        !info->types[type].available) {
+        g_dbus_method_invocation_return_error(
+            invocation,
+            DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_FAILED,
+            "Unhandled MIME types requested");
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    if (info->types[type].data) {
+        dbus_clipboard_complete_request(dpy, invocation, info, type);
+    } else {
+        qemu_clipboard_request(info, type);
+
+        dpy->clipboard_request[s].invocation = g_object_ref(invocation);
+        dpy->clipboard_request[s].type = type;
+        dpy->clipboard_request[s].timeout_id =
+            g_timeout_add_seconds(5, dbus_clipboard_request_timeout,
+                                  &dpy->clipboard_request[s]);
+    }
+
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+void
+dbus_clipboard_init(DBusDisplay *dpy)
+{
+    g_autoptr(GDBusObjectSkeleton) clipboard = NULL;
+
+    assert(!dpy->clipboard);
+
+    clipboard = g_dbus_object_skeleton_new(DBUS_DISPLAY1_ROOT "/Clipboard");
+    dpy->clipboard = qemu_dbus_display1_clipboard_skeleton_new();
+    g_object_connect(dpy->clipboard,
+                     "swapped-signal::handle-register",
+                     dbus_clipboard_register, dpy,
+                     "swapped-signal::handle-unregister",
+                     dbus_clipboard_unregister, dpy,
+                     "swapped-signal::handle-grab",
+                     dbus_clipboard_grab, dpy,
+                     "swapped-signal::handle-release",
+                     dbus_clipboard_release, dpy,
+                     "swapped-signal::handle-request",
+                     dbus_clipboard_request, dpy,
+                     NULL);
+
+    g_dbus_object_skeleton_add_interface(
+        G_DBUS_OBJECT_SKELETON(clipboard),
+        G_DBUS_INTERFACE_SKELETON(dpy->clipboard));
+    g_dbus_object_manager_server_export(dpy->server, clipboard);
+    dpy->clipboard_peer.name = "dbus";
+    dpy->clipboard_peer.notifier.notify = dbus_clipboard_notify;
+    dpy->clipboard_peer.request = dbus_clipboard_qemu_request;
+    qemu_clipboard_peer_register(&dpy->clipboard_peer);
+}

ui/dbus-console.c

@@ -0,0 +1,497 @@
+/*
+ * QEMU DBus display console
+ *
+ * Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "ui/input.h"
+#include "ui/kbd-state.h"
+#include "trace.h"
+
+#include <gio/gunixfdlist.h>
+
+#include "dbus.h"
+
+struct _DBusDisplayConsole {
+    GDBusObjectSkeleton parent_instance;
+    DisplayChangeListener dcl;
+
+    DBusDisplay *display;
+    QemuConsole *con;
+    GHashTable *listeners;
+    QemuDBusDisplay1Console *iface;
+
+    QemuDBusDisplay1Keyboard *iface_kbd;
+    QKbdState *kbd;
+
+    QemuDBusDisplay1Mouse *iface_mouse;
+    gboolean last_set;
+    guint last_x;
+    guint last_y;
+    Notifier mouse_mode_notifier;
+};
+
+G_DEFINE_TYPE(DBusDisplayConsole,
+              dbus_display_console,
+              G_TYPE_DBUS_OBJECT_SKELETON)
+
+static void
+dbus_display_console_set_size(DBusDisplayConsole *ddc,
+                              uint32_t width, uint32_t height)
+{
+    g_object_set(ddc->iface,
+                 "width", width,
+                 "height", height,
+                 NULL);
+}
+
+static void
+dbus_gfx_switch(DisplayChangeListener *dcl,
+                struct DisplaySurface *new_surface)
+{
+    DBusDisplayConsole *ddc = container_of(dcl, DBusDisplayConsole, dcl);
+
+    dbus_display_console_set_size(ddc,
+                                  surface_width(new_surface),
+                                  surface_height(new_surface));
+}
+
+static void
+dbus_gfx_update(DisplayChangeListener *dcl,
+                int x, int y, int w, int h)
+{
+}
+
+static void
+dbus_gl_scanout_disable(DisplayChangeListener *dcl)
+{
+}
+
+static void
+dbus_gl_scanout_texture(DisplayChangeListener *dcl,
+                        uint32_t tex_id,
+                        bool backing_y_0_top,
+                        uint32_t backing_width,
+                        uint32_t backing_height,
+                        uint32_t x, uint32_t y,
+                        uint32_t w, uint32_t h)
+{
+    DBusDisplayConsole *ddc = container_of(dcl, DBusDisplayConsole, dcl);
+
+    dbus_display_console_set_size(ddc, w, h);
+}
+
+static void
+dbus_gl_scanout_dmabuf(DisplayChangeListener *dcl,
+                       QemuDmaBuf *dmabuf)
+{
+    DBusDisplayConsole *ddc = container_of(dcl, DBusDisplayConsole, dcl);
+
+    dbus_display_console_set_size(ddc,
+                                  dmabuf->width,
+                                  dmabuf->height);
+}
+
+static void
+dbus_gl_scanout_update(DisplayChangeListener *dcl,
+                       uint32_t x, uint32_t y,
+                       uint32_t w, uint32_t h)
+{
+}
+
+static const DisplayChangeListenerOps dbus_console_dcl_ops = {
+    .dpy_name                = "dbus-console",
+    .dpy_gfx_switch          = dbus_gfx_switch,
+    .dpy_gfx_update          = dbus_gfx_update,
+    .dpy_gl_scanout_disable  = dbus_gl_scanout_disable,
+    .dpy_gl_scanout_texture  = dbus_gl_scanout_texture,
+    .dpy_gl_scanout_dmabuf   = dbus_gl_scanout_dmabuf,
+    .dpy_gl_update           = dbus_gl_scanout_update,
+};
+
+static void
+dbus_display_console_init(DBusDisplayConsole *object)
+{
+    DBusDisplayConsole *ddc = DBUS_DISPLAY_CONSOLE(object);
+
+    ddc->listeners = g_hash_table_new_full(g_str_hash, g_str_equal,
+                                            NULL, g_object_unref);
+    ddc->dcl.ops = &dbus_console_dcl_ops;
+}
+
+static void
+dbus_display_console_dispose(GObject *object)
+{
+    DBusDisplayConsole *ddc = DBUS_DISPLAY_CONSOLE(object);
+
+    unregister_displaychangelistener(&ddc->dcl);
+    g_clear_object(&ddc->iface_kbd);
+    g_clear_object(&ddc->iface);
+    g_clear_pointer(&ddc->listeners, g_hash_table_unref);
+    g_clear_pointer(&ddc->kbd, qkbd_state_free);
+
+    G_OBJECT_CLASS(dbus_display_console_parent_class)->dispose(object);
+}
+
+static void
+dbus_display_console_class_init(DBusDisplayConsoleClass *klass)
+{
+    GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
+
+    gobject_class->dispose = dbus_display_console_dispose;
+}
+
+static void
+listener_vanished_cb(DBusDisplayListener *listener)
+{
+    DBusDisplayConsole *ddc = dbus_display_listener_get_console(listener);
+    const char *name = dbus_display_listener_get_bus_name(listener);
+
+    trace_dbus_listener_vanished(name);
+
+    g_hash_table_remove(ddc->listeners, name);
+    qkbd_state_lift_all_keys(ddc->kbd);
+}
+
+static gboolean
+dbus_console_set_ui_info(DBusDisplayConsole *ddc,
+                         GDBusMethodInvocation *invocation,
+                         guint16 arg_width_mm,
+                         guint16 arg_height_mm,
+                         gint arg_xoff,
+                         gint arg_yoff,
+                         guint arg_width,
+                         guint arg_height)
+{
+    QemuUIInfo info = {
+        .width_mm = arg_width_mm,
+        .height_mm = arg_height_mm,
+        .xoff = arg_xoff,
+        .yoff = arg_yoff,
+        .width = arg_width,
+        .height = arg_height,
+    };
+
+    if (!dpy_ui_info_supported(ddc->con)) {
+        g_dbus_method_invocation_return_error(invocation,
+                                              DBUS_DISPLAY_ERROR,
+                                              DBUS_DISPLAY_ERROR_UNSUPPORTED,
+                                              "SetUIInfo is not supported");
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    dpy_set_ui_info(ddc->con, &info, false);
+    qemu_dbus_display1_console_complete_set_uiinfo(ddc->iface, invocation);
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static gboolean
+dbus_console_register_listener(DBusDisplayConsole *ddc,
+                               GDBusMethodInvocation *invocation,
+                               GUnixFDList *fd_list,
+                               GVariant *arg_listener)
+{
+    const char *sender = g_dbus_method_invocation_get_sender(invocation);
+    GDBusConnection *listener_conn;
+    g_autoptr(GError) err = NULL;
+    g_autoptr(GSocket) socket = NULL;
+    g_autoptr(GSocketConnection) socket_conn = NULL;
+    g_autofree char *guid = g_dbus_generate_guid();
+    DBusDisplayListener *listener;
+    int fd;
+
+    if (sender && g_hash_table_contains(ddc->listeners, sender)) {
+        g_dbus_method_invocation_return_error(
+            invocation,
+            DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_INVALID,
+            "`%s` is already registered!",
+            sender);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    fd = g_unix_fd_list_get(fd_list, g_variant_get_handle(arg_listener), &err);
+    if (err) {
+        g_dbus_method_invocation_return_error(
+            invocation,
+            DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_FAILED,
+            "Couldn't get peer fd: %s", err->message);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    socket = g_socket_new_from_fd(fd, &err);
+    if (err) {
+        g_dbus_method_invocation_return_error(
+            invocation,
+            DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_FAILED,
+            "Couldn't make a socket: %s", err->message);
+        close(fd);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+    socket_conn = g_socket_connection_factory_create_connection(socket);
+
+    qemu_dbus_display1_console_complete_register_listener(
+        ddc->iface, invocation, NULL);
+
+    listener_conn = g_dbus_connection_new_sync(
+        G_IO_STREAM(socket_conn),
+        guid,
+        G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER,
+        NULL, NULL, &err);
+    if (err) {
+        error_report("Failed to setup peer connection: %s", err->message);
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    listener = dbus_display_listener_new(sender, listener_conn, ddc);
+    if (!listener) {
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    g_hash_table_insert(ddc->listeners,
+                        (gpointer)dbus_display_listener_get_bus_name(listener),
+                        listener);
+    g_object_connect(listener_conn,
+                     "swapped-signal::closed", listener_vanished_cb, listener,
+                     NULL);
+
+    trace_dbus_registered_listener(sender);
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static gboolean
+dbus_kbd_press(DBusDisplayConsole *ddc,
+               GDBusMethodInvocation *invocation,
+               guint arg_keycode)
+{
+    QKeyCode qcode = qemu_input_key_number_to_qcode(arg_keycode);
+
+    trace_dbus_kbd_press(arg_keycode);
+
+    qkbd_state_key_event(ddc->kbd, qcode, true);
+
+    qemu_dbus_display1_keyboard_complete_press(ddc->iface_kbd, invocation);
+
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static gboolean
+dbus_kbd_release(DBusDisplayConsole *ddc,
+                 GDBusMethodInvocation *invocation,
+                 guint arg_keycode)
+{
+    QKeyCode qcode = qemu_input_key_number_to_qcode(arg_keycode);
+
+    trace_dbus_kbd_release(arg_keycode);
+
+    qkbd_state_key_event(ddc->kbd, qcode, false);
+
+    qemu_dbus_display1_keyboard_complete_release(ddc->iface_kbd, invocation);
+
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static void
+dbus_kbd_qemu_leds_updated(void *data, int ledstate)
+{
+    DBusDisplayConsole *ddc = DBUS_DISPLAY_CONSOLE(data);
+
+    qemu_dbus_display1_keyboard_set_modifiers(ddc->iface_kbd, ledstate);
+}
+
+static gboolean
+dbus_mouse_rel_motion(DBusDisplayConsole *ddc,
+                      GDBusMethodInvocation *invocation,
+                      int dx, int dy)
+{
+    trace_dbus_mouse_rel_motion(dx, dy);
+
+    if (qemu_input_is_absolute()) {
+        g_dbus_method_invocation_return_error(
+            invocation, DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_INVALID,
+            "Mouse is not relative");
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    qemu_input_queue_rel(ddc->con, INPUT_AXIS_X, dx);
+    qemu_input_queue_rel(ddc->con, INPUT_AXIS_Y, dy);
+    qemu_input_event_sync();
+
+    qemu_dbus_display1_mouse_complete_rel_motion(ddc->iface_mouse,
+                                                    invocation);
+
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static gboolean
+dbus_mouse_set_pos(DBusDisplayConsole *ddc,
+                   GDBusMethodInvocation *invocation,
+                   guint x, guint y)
+{
+    int width, height;
+
+    trace_dbus_mouse_set_pos(x, y);
+
+    if (!qemu_input_is_absolute()) {
+        g_dbus_method_invocation_return_error(
+            invocation, DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_INVALID,
+            "Mouse is not absolute");
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+
+    width = qemu_console_get_width(ddc->con, 0);
+    height = qemu_console_get_height(ddc->con, 0);
+    if (x >= width || y >= height) {
+        g_dbus_method_invocation_return_error(
+            invocation, DBUS_DISPLAY_ERROR,
+            DBUS_DISPLAY_ERROR_INVALID,
+            "Invalid mouse position");
+        return DBUS_METHOD_INVOCATION_HANDLED;
+    }
+    qemu_input_queue_abs(ddc->con, INPUT_AXIS_X, x, 0, width);
+    qemu_input_queue_abs(ddc->con, INPUT_AXIS_Y, y, 0, height);
+    qemu_input_event_sync();
+
+    qemu_dbus_display1_mouse_complete_set_abs_position(ddc->iface_mouse,
+                                                          invocation);
+
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static gboolean
+dbus_mouse_press(DBusDisplayConsole *ddc,
+                 GDBusMethodInvocation *invocation,
+                 guint button)
+{
+    trace_dbus_mouse_press(button);
+
+    qemu_input_queue_btn(ddc->con, button, true);
+    qemu_input_event_sync();
+
+    qemu_dbus_display1_mouse_complete_press(ddc->iface_mouse, invocation);
+
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static gboolean
+dbus_mouse_release(DBusDisplayConsole *ddc,
+                   GDBusMethodInvocation *invocation,
+                   guint button)
+{
+    trace_dbus_mouse_release(button);
+
+    qemu_input_queue_btn(ddc->con, button, false);
+    qemu_input_event_sync();
+
+    qemu_dbus_display1_mouse_complete_release(ddc->iface_mouse, invocation);
+
+    return DBUS_METHOD_INVOCATION_HANDLED;
+}
+
+static void
+dbus_mouse_mode_change(Notifier *notify, void *data)
+{
+    DBusDisplayConsole *ddc =
+        container_of(notify, DBusDisplayConsole, mouse_mode_notifier);
+
+    g_object_set(ddc->iface_mouse,
+                 "is-absolute", qemu_input_is_absolute(),
+                 NULL);
+}
+
+int dbus_display_console_get_index(DBusDisplayConsole *ddc)
+{
+    return qemu_console_get_index(ddc->con);
+}
+
+DBusDisplayConsole *
+dbus_display_console_new(DBusDisplay *display, QemuConsole *con)
+{
+    g_autofree char *path = NULL;
+    g_autofree char *label = NULL;
+    char device_addr[256] = "";
+    DBusDisplayConsole *ddc;
+    int idx;
+
+    assert(display);
+    assert(con);
+
+    label = qemu_console_get_label(con);
+    idx = qemu_console_get_index(con);
+    path = g_strdup_printf(DBUS_DISPLAY1_ROOT "/Console_%d", idx);
+    ddc = g_object_new(DBUS_DISPLAY_TYPE_CONSOLE,
+                        "g-object-path", path,
+                        NULL);
+    ddc->display = display;
+    ddc->con = con;
+    /* handle errors, and skip non graphics? */
+    qemu_console_fill_device_address(
+        con, device_addr, sizeof(device_addr), NULL);
+
+    ddc->iface = qemu_dbus_display1_console_skeleton_new();
+    g_object_set(ddc->iface,
+        "label", label,
+        "type", qemu_console_is_graphic(con) ? "Graphic" : "Text",
+        "head", qemu_console_get_head(con),
+        "width", qemu_console_get_width(con, 0),
+        "height", qemu_console_get_height(con, 0),
+        "device-address", device_addr,
+        NULL);
+    g_object_connect(ddc->iface,
+        "swapped-signal::handle-register-listener",
+        dbus_console_register_listener, ddc,
+        "swapped-signal::handle-set-uiinfo",
+        dbus_console_set_ui_info, ddc,
+        NULL);
+    g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(ddc),
+        G_DBUS_INTERFACE_SKELETON(ddc->iface));
+
+    ddc->kbd = qkbd_state_init(con);
+    ddc->iface_kbd = qemu_dbus_display1_keyboard_skeleton_new();
+    qemu_add_led_event_handler(dbus_kbd_qemu_leds_updated, ddc);
+    g_object_connect(ddc->iface_kbd,
+        "swapped-signal::handle-press", dbus_kbd_press, ddc,
+        "swapped-signal::handle-release", dbus_kbd_release, ddc,
+        NULL);
+    g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(ddc),
+        G_DBUS_INTERFACE_SKELETON(ddc->iface_kbd));
+
+    ddc->iface_mouse = qemu_dbus_display1_mouse_skeleton_new();
+    g_object_connect(ddc->iface_mouse,
+        "swapped-signal::handle-set-abs-position", dbus_mouse_set_pos, ddc,
+        "swapped-signal::handle-rel-motion", dbus_mouse_rel_motion, ddc,
+        "swapped-signal::handle-press", dbus_mouse_press, ddc,
+        "swapped-signal::handle-release", dbus_mouse_release, ddc,
+        NULL);
+    g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(ddc),
+        G_DBUS_INTERFACE_SKELETON(ddc->iface_mouse));
+
+    register_displaychangelistener(&ddc->dcl);
+    ddc->mouse_mode_notifier.notify = dbus_mouse_mode_change;
+    qemu_add_mouse_mode_change_notifier(&ddc->mouse_mode_notifier);
+
+    return ddc;
+}

ui/dbus-display1.xml

@@ -0,0 +1,761 @@
+<?xml version="1.0" encoding="utf-8"?>
+<node>
+  <!--
+      org.qemu.Display1.VM:
+
+      This interface is implemented on ``/org/qemu/Display1/VM``.
+  -->
+  <interface name="org.qemu.Display1.VM">
+    <!--
+        Name:
+
+        The name of the VM.
+    -->
+    <property name="Name" type="s" access="read"/>
+
+    <!--
+        UUID:
+
+        The UUID of the VM.
+    -->
+    <property name="UUID" type="s" access="read"/>
+
+    <!--
+        ConsoleIDs:
+
+        The list of consoles available on ``/org/qemu/Display1/Console_$id``.
+    -->
+    <property name="ConsoleIDs" type="au" access="read"/>
+  </interface>
+
+  <!--
+      org.qemu.Display1.Console:
+
+      This interface is implemented on ``/org/qemu/Display1/Console_$id``. You
+      may discover available consoles through introspection or with the
+      :dbus:prop:`org.qemu.Display1.VM.ConsoleIDs` property.
+
+      A console is attached to a video device head. It may be "Graphic" or
+      "Text" (see :dbus:prop:`Type` and other properties).
+
+      Interactions with a console may be done with
+      :dbus:iface:`org.qemu.Display1.Keyboard` and
+      :dbus:iface:`org.qemu.Display1.Mouse` interfaces when available.
+  -->
+  <interface name="org.qemu.Display1.Console">
+    <!--
+        RegisterListener:
+        @listener: a Unix socket FD, for peer-to-peer D-Bus communication.
+
+        Register a console listener, which will receive display updates, until
+        it is disconnected.
+
+        Multiple listeners may be registered simultaneously.
+
+        The listener is expected to implement the
+        :dbus:iface:`org.qemu.Display1.Listener` interface.
+    -->
+    <method name="RegisterListener">
+      <arg type="h" name="listener" direction="in"/>
+    </method>
+
+    <!--
+        SetUIInfo:
+        @width_mm: the physical display width in millimeters.
+        @height_mm: the physical display height in millimeters.
+        @xoff: horizontal offset, in pixels.
+        @yoff: vertical offset, in pixels.
+        @width: console width, in pixels.
+        @height: console height, in pixels.
+
+        Modify the dimensions and display settings.
+    -->
+    <method name="SetUIInfo">
+      <arg name="width_mm" type="q" direction="in"/>
+      <arg name="height_mm" type="q" direction="in"/>
+      <arg name="xoff" type="i" direction="in"/>
+      <arg name="yoff" type="i" direction="in"/>
+      <arg name="width" type="u" direction="in"/>
+      <arg name="height" type="u" direction="in"/>
+    </method>
+
+    <!--
+        Label:
+
+        A user-friendly name for the console (for ex: "VGA").
+    -->
+    <property name="Label" type="s" access="read"/>
+
+    <!--
+        Head:
+
+        Graphical device head number.
+    -->
+    <property name="Head" type="u" access="read"/>
+
+    <!--
+        Type:
+
+        Console type ("Graphic" or "Text").
+    -->
+    <property name="Type" type="s" access="read"/>
+
+    <!--
+        Width:
+
+        Console width, in pixels.
+    -->
+    <property name="Width" type="u" access="read"/>
+
+    <!--
+        Height:
+
+        Console height, in pixels.
+    -->
+    <property name="Height" type="u" access="read"/>
+
+    <!--
+        DeviceAddress:
+
+        The device address (ex: "pci/0000/02.0").
+    -->
+    <property name="DeviceAddress" type="s" access="read"/>
+  </interface>
+
+  <!--
+      org.qemu.Display1.Keyboard:
+
+      This interface in implemented on ``/org/qemu/Display1/Console_$id`` (see
+      :dbus:iface:`~org.qemu.Display1.Console`).
+  -->
+  <interface name="org.qemu.Display1.Keyboard">
+    <!--
+        Press:
+        @keycode: QEMU key number (xtkbd + special re-encoding of high bit)
+
+        Send a key press event.
+    -->
+    <method name="Press">
+      <arg type="u" name="keycode" direction="in"/>
+    </method>
+
+    <!--
+        Release:
+        @keycode: QEMU key number (xtkbd + special re-encoding of high bit)
+
+        Send a key release event.
+    -->
+    <method name="Release">
+      <arg type="u" name="keycode" direction="in"/>
+    </method>
+
+    <!--
+        Modifiers:
+
+        The active keyboard modifiers::
+
+          Scroll = 1 << 0
+          Num    = 1 << 1
+          Caps   = 1 << 2
+    -->
+    <property name="Modifiers" type="u" access="read"/>
+  </interface>
+
+  <!--
+      org.qemu.Display1.Mouse:
+
+      This interface in implemented on ``/org/qemu/Display1/Console_$id`` (see
+      :dbus:iface:`~org.qemu.Display1.Console` documentation).
+
+      .. _dbus-button-values:
+
+      **Button values**::
+
+        Left       = 0
+        Middle     = 1
+        Right      = 2
+        Wheel-up   = 3
+        Wheel-down = 4
+        Side       = 5
+        Extra      = 6
+  -->
+  <interface name="org.qemu.Display1.Mouse">
+    <!--
+        Press:
+        @button: :ref:`button value<dbus-button-values>`.
+
+        Send a mouse button press event.
+    -->
+    <method name="Press">
+      <arg type="u" name="button" direction="in"/>
+    </method>
+
+    <!--
+        Release:
+        @button: :ref:`button value<dbus-button-values>`.
+
+        Send a mouse button release event.
+    -->
+    <method name="Release">
+      <arg type="u" name="button" direction="in"/>
+    </method>
+
+    <!--
+        SetAbsPosition:
+        @x: X position, in pixels.
+        @y: Y position, in pixels.
+
+        Set the mouse pointer position.
+
+        Returns an error if not :dbus:prop:`IsAbsolute`.
+    -->
+    <method name="SetAbsPosition">
+      <arg type="u" name="x" direction="in"/>
+      <arg type="u" name="y" direction="in"/>
+    </method>
+
+    <!--
+        RelMotion:
+        @dx: X-delta, in pixels.
+        @dy: Y-delta, in pixels.
+
+        Move the mouse pointer position, relative to the current position.
+
+        Returns an error if :dbus:prop:`IsAbsolute`.
+    -->
+    <method name="RelMotion">
+      <arg type="i" name="dx" direction="in"/>
+      <arg type="i" name="dy" direction="in"/>
+    </method>
+
+    <!--
+        IsAbsolute:
+
+        Whether the mouse is using absolute movements.
+    -->
+    <property name="IsAbsolute" type="b" access="read"/>
+  </interface>
+
+  <!--
+      org.qemu.Display1.Listener:
+
+      This client-side interface must be available on
+      ``/org/qemu/Display1/Listener`` when registering the peer-to-peer
+      connection with :dbus:meth:`~org.qemu.Display1.Console.Register`.
+  -->
+  <interface name="org.qemu.Display1.Listener">
+    <!--
+        Scanout:
+        @width: display width, in pixels.
+        @height: display height, in pixels.
+        @stride: data stride, in bytes.
+        @pixman_format: image format (ex: ``PIXMAN_X8R8G8B8``).
+        @data: image data.
+
+        Resize and update the display content.
+
+        The data to transfer for the display update may be large. The preferred
+        scanout method is :dbus:meth:`ScanoutDMABUF`, used whenever possible.
+    -->
+    <method name="Scanout">
+      <arg type="u" name="width" direction="in"/>
+      <arg type="u" name="height" direction="in"/>
+      <arg type="u" name="stride" direction="in"/>
+      <arg type="u" name="pixman_format" direction="in"/>
+      <arg type="ay" name="data" direction="in">
+        <annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
+      </arg>
+    </method>
+
+    <!--
+        Update:
+        @x: X update position, in pixels.
+        @y: Y update position, in pixels.
+        @width: update width, in pixels.
+        @height: update height, in pixels.
+        @stride: data stride, in bytes.
+        @pixman_format: image format (ex: ``PIXMAN_X8R8G8B8``).
+        @data: display image data.
+
+        Update the display content.
+
+        This method is only called after a :dbus:meth:`Scanout` call.
+    -->
+    <method name="Update">
+      <arg type="i" name="x" direction="in"/>
+      <arg type="i" name="y" direction="in"/>
+      <arg type="i" name="width" direction="in"/>
+      <arg type="i" name="height" direction="in"/>
+      <arg type="u" name="stride" direction="in"/>
+      <arg type="u" name="pixman_format" direction="in"/>
+      <arg type="ay" name="data" direction="in">
+        <annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
+      </arg>
+    </method>
+
+    <!--
+        ScanoutDMABUF:
+        @dmabuf: the DMABUF file descriptor.
+        @width: display width, in pixels.
+        @height: display height, in pixels.
+        @stride: stride, in bytes.
+        @fourcc: DMABUF fourcc.
+        @modifier: DMABUF modifier.
+        @y0_top: whether Y position 0 is the top or not.
+
+        Resize and update the display content with a DMABUF.
+    -->
+    <method name="ScanoutDMABUF">
+      <arg type="h" name="dmabuf" direction="in"/>
+      <arg type="u" name="width" direction="in"/>
+      <arg type="u" name="height" direction="in"/>
+      <arg type="u" name="stride" direction="in"/>
+      <arg type="u" name="fourcc" direction="in"/>
+      <!-- xywh? -->
+      <arg type="t" name="modifier" direction="in"/>
+      <arg type="b" name="y0_top" direction="in"/>
+    </method>
+
+    <!--
+        UpdateDMABUF:
+        @x: the X update position, in pixels.
+        @y: the Y update position, in pixels.
+        @width: the update width, in pixels.
+        @height: the update height, in pixels.
+
+        Update the display content with the current DMABUF and the given region.
+    -->
+    <method name="UpdateDMABUF">
+      <arg type="i" name="x" direction="in"/>
+      <arg type="i" name="y" direction="in"/>
+      <arg type="i" name="width" direction="in"/>
+      <arg type="i" name="height" direction="in"/>
+    </method>
+
+    <!--
+        Disable:
+
+        Disable the display (turn it off).
+    -->
+    <method name="Disable">
+    </method>
+
+    <!--
+        MouseSet:
+        @x: X mouse position, in pixels.
+        @y: Y mouse position, in pixels.
+        @on: whether the mouse is visible or not.
+
+        Set the mouse position and visibility.
+    -->
+    <method name="MouseSet">
+      <arg type="i" name="x" direction="in"/>
+      <arg type="i" name="y" direction="in"/>
+      <arg type="i" name="on" direction="in"/>
+    </method>
+
+    <!--
+        CursorDefine:
+        @width: cursor width, in pixels.
+        @height: cursor height, in pixels.
+        @hot_x: hot-spot X position, in pixels.
+        @hot_y: hot-spot Y position, in pixels.
+        @data: the cursor data.
+
+        Set the mouse cursor shape and hot-spot. The "data" must be ARGB, 32-bit
+        per pixel.
+    -->
+    <method name="CursorDefine">
+      <arg type="i" name="width" direction="in"/>
+      <arg type="i" name="height" direction="in"/>
+      <arg type="i" name="hot_x" direction="in"/>
+      <arg type="i" name="hot_y" direction="in"/>
+      <arg type="ay" name="data" direction="in">
+        <annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
+      </arg>
+    </method>
+  </interface>
+
+  <!--
+      org.qemu.Display1.Clipboard:
+
+      This interface must be implemented by both the client and the server on
+      ``/org/qemu/Display1/Clipboard`` to support clipboard sharing between
+      the client and the guest.
+
+      Once :dbus:meth:`Register`'ed, method calls may be sent and received in both
+      directions. Unregistered callers will get error replies.
+
+      .. _dbus-clipboard-selection:
+
+      **Selection values**::
+
+        Clipboard   = 0
+        Primary     = 1
+        Secondary   = 2
+
+      .. _dbus-clipboard-serial:
+
+      **Serial counter**
+
+      To solve potential clipboard races, clipboard grabs have an associated
+      serial counter. It is set to 0 on registration, and incremented by 1 for
+      each grab. The peer with the highest serial is the clipboard grab owner.
+
+      When a grab with a lower serial is received, it should be discarded.
+
+      When a grab is attempted with the same serial number as the current grab,
+      the one coming from the client should have higher priority, and the client
+      should gain clipboard grab ownership.
+  -->
+  <interface name="org.qemu.Display1.Clipboard">
+    <!--
+        Register:
+
+        Register a clipboard session and reinitialize the serial counter.
+
+        The client must register itself, and is granted an exclusive
+        access for handling the clipboard.
+
+        The server can reinitialize the session as well (to reset the counter).
+    -->
+    <method name="Register"/>
+
+    <!--
+        Unregister:
+
+        Unregister the clipboard session.
+    -->
+    <method name="Unregister"/>
+    <!--
+        Grab:
+        @selection: a :ref:`selection value<dbus-clipboard-selection>`.
+        @serial: the current grab :ref:`serial<dbus-clipboard-serial>`.
+        @mimes: the list of available content MIME types.
+
+        Grab the clipboard, claiming current clipboard content.
+    -->
+    <method name="Grab">
+      <arg type="u" name="selection"/>
+      <arg type="u" name="serial"/>
+      <arg type="as" name="mimes"/>
+    </method>
+
+    <!--
+        Release:
+        @selection: a :ref:`selection value<dbus-clipboard-selection>`.
+
+        Release the clipboard (does nothing if not the current owner).
+    -->
+    <method name="Release">
+      <arg type="u" name="selection"/>
+    </method>
+
+    <!--
+        Request:
+        @selection: a :ref:`selection value<dbus-clipboard-selection>`
+        @mimes: requested MIME types (by order of preference).
+        @reply_mime: the returned data MIME type.
+        @data: the clipboard data.
+
+        Request the clipboard content.
+
+        Return an error if the clipboard is empty, or the requested MIME types
+        are unavailable.
+    -->
+    <method name="Request">
+      <arg type="u" name="selection"/>
+      <arg type="as" name="mimes"/>
+      <arg type="s" name="reply_mime" direction="out"/>
+      <arg type="ay" name="data" direction="out">
+        <annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
+      </arg>
+    </method>
+  </interface>
+
+  <!--
+      org.qemu.Display1.Audio:
+
+      Audio backend may be available on ``/org/qemu/Display1/Audio``.
+  -->
+  <interface name="org.qemu.Display1.Audio">
+    <!--
+        RegisterOutListener:
+        @listener: a Unix socket FD, for peer-to-peer D-Bus communication.
+
+        Register an audio backend playback handler.
+
+        Multiple listeners may be registered simultaneously.
+
+        The listener is expected to implement the
+        :dbus:iface:`org.qemu.Display1.AudioOutListener` interface.
+    -->
+    <method name="RegisterOutListener">
+      <arg type="h" name="listener" direction="in"/>
+    </method>
+
+    <!--
+        RegisterInListener:
+        @listener: a Unix socket FD, for peer-to-peer D-Bus communication.
+
+        Register an audio backend record handler.
+
+        Multiple listeners may be registered simultaneously.
+
+        The listener is expected to implement the
+        :dbus:iface:`org.qemu.Display1.AudioInListener` interface.
+    -->
+    <method name="RegisterInListener">
+      <arg type="h" name="listener" direction="in"/>
+    </method>
+  </interface>
+
+  <!--
+      org.qemu.Display1.AudioOutListener:
+
+      This client-side interface must be available on
+      ``/org/qemu/Display1/AudioOutListener`` when registering the peer-to-peer
+      connection with :dbus:meth:`~org.qemu.Display1.Audio.RegisterOutListener`.
+  -->
+  <interface name="org.qemu.Display1.AudioOutListener">
+    <!--
+        Init:
+        @id: the stream ID.
+        @bits: PCM bits per sample.
+        @is_signed: whether the PCM data is signed.
+        @is_float: PCM floating point format.
+        @freq: the PCM frequency in Hz.
+        @nchannels: the number of channels.
+        @bytes_per_frame: the bytes per frame.
+        @bytes_per_second: the bytes per second.
+        @be: whether using big-endian format.
+
+        Initializes a PCM playback stream.
+    -->
+    <method name="Init">
+      <arg name="id" type="t" direction="in"/>
+      <arg name="bits" type="y" direction="in"/>
+      <arg name="is_signed" type="b" direction="in"/>
+      <arg name="is_float" type="b" direction="in"/>
+      <arg name="freq" type="u" direction="in"/>
+      <arg name="nchannels" type="y" direction="in"/>
+      <arg name="bytes_per_frame" type="u" direction="in"/>
+      <arg name="bytes_per_second" type="u" direction="in"/>
+      <arg name="be" type="b" direction="in"/>
+    </method>
+
+    <!--
+        Fini:
+        @id: the stream ID.
+
+        Finish & close a playback stream.
+    -->
+    <method name="Fini">
+      <arg name="id" type="t" direction="in"/>
+    </method>
+
+    <!--
+        SetEnabled:
+        @id: the stream ID.
+
+        Resume or suspend the playback stream.
+    -->
+    <method name="SetEnabled">
+      <arg name="id" type="t" direction="in"/>
+      <arg name="enabled" type="b" direction="in"/>
+    </method>
+
+    <!--
+        SetVolume:
+        @id: the stream ID.
+        @mute: whether the stream is muted.
+        @volume: the volume per-channel.
+
+        Set the stream volume and mute state (volume without unit, 0-255).
+    -->
+    <method name="SetVolume">
+      <arg name="id" type="t" direction="in"/>
+      <arg name="mute" type="b" direction="in"/>
+      <arg name="volume" type="ay" direction="in">
+        <annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
+      </arg>
+    </method>
+
+    <!--
+        Write:
+        @id: the stream ID.
+        @data: the PCM data.
+
+        PCM stream to play.
+    -->
+    <method name="Write">
+      <arg name="id" type="t" direction="in"/>
+      <arg type="ay" name="data" direction="in">
+        <annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
+      </arg>
+    </method>
+  </interface>
+
+  <!--
+      org.qemu.Display1.AudioInListener:
+
+      This client-side interface must be available on
+      ``/org/qemu/Display1/AudioInListener`` when registering the peer-to-peer
+      connection with :dbus:meth:`~org.qemu.Display1.Audio.RegisterInListener`.
+  -->
+  <interface name="org.qemu.Display1.AudioInListener">
+    <!--
+        Init:
+        @id: the stream ID.
+        @bits: PCM bits per sample.
+        @is_signed: whether the PCM data is signed.
+        @is_float: PCM floating point format.
+        @freq: the PCM frequency in Hz.
+        @nchannels: the number of channels.
+        @bytes_per_frame: the bytes per frame.
+        @bytes_per_second: the bytes per second.
+        @be: whether using big-endian format.
+
+        Initializes a PCM record stream.
+    -->
+    <method name="Init">
+      <arg name="id" type="t" direction="in"/>
+      <arg name="bits" type="y" direction="in"/>
+      <arg name="is_signed" type="b" direction="in"/>
+      <arg name="is_float" type="b" direction="in"/>
+      <arg name="freq" type="u" direction="in"/>
+      <arg name="nchannels" type="y" direction="in"/>
+      <arg name="bytes_per_frame" type="u" direction="in"/>
+      <arg name="bytes_per_second" type="u" direction="in"/>
+      <arg name="be" type="b" direction="in"/>
+    </method>
+
+    <!--
+        Fini:
+        @id: the stream ID.
+
+        Finish & close a record stream.
+    -->
+    <method name="Fini">
+      <arg name="id" type="t" direction="in"/>
+    </method>
+
+    <!--
+        SetEnabled:
+        @id: the stream ID.
+
+        Resume or suspend the record stream.
+    -->
+    <method name="SetEnabled">
+      <arg name="id" type="t" direction="in"/>
+      <arg name="enabled" type="b" direction="in"/>
+    </method>
+
+    <!--
+        SetVolume:
+        @id: the stream ID.
+        @mute: whether the stream is muted.
+        @volume: the volume per-channel.
+
+        Set the stream volume and mute state (volume without unit, 0-255).
+    -->
+    <method name="SetVolume">
+      <arg name="id" type="t" direction="in"/>
+      <arg name="mute" type="b" direction="in"/>
+      <arg name="volume" type="ay" direction="in">
+        <annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
+      </arg>
+    </method>
+
+    <!--
+        Read:
+        @id: the stream ID.
+        @size: the amount to read, in bytes.
+        @data: the recorded data (which may be less than requested).
+
+        Read "size" bytes from the record stream.
+    -->
+    <method name="Read">
+      <arg name="id" type="t" direction="in"/>
+      <arg name="size" type="t" direction="in"/>
+      <arg type="ay" name="data" direction="out">
+        <annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
+      </arg>
+    </method>
+  </interface>
+
+  <!--
+      org.qemu.Display1.Chardev:
+
+      Character devices may be available on ``/org/qemu/Display1/Chardev_$id``.
+
+      They may be used for different kind of streams, which are identified via
+      their FQDN :dbus:prop:`Name`.
+
+      .. _dbus-chardev-fqdn:
+
+      Here are some known reserved kind names (the ``org.qemu`` prefix is
+      reserved by QEMU):
+
+      org.qemu.console.serial.0
+        A serial console stream.
+
+      org.qemu.monitor.hmp.0
+        A QEMU HMP human monitor.
+
+      org.qemu.monitor.qmp.0
+        A QEMU QMP monitor.
+
+      org.qemu.usbredir
+        A usbredir stream.
+  -->
+  <interface name="org.qemu.Display1.Chardev">
+    <!--
+        Register:
+        @stream: a Unix FD to redirect the stream to.
+
+        Register a file-descriptor for the stream handling.
+
+        The current handler, if any, will be replaced.
+    -->
+    <method name="Register">
+      <arg type="h" name="stream" direction="in"/>
+    </method>
+
+    <!--
+        SendBreak:
+
+        Send a break event to the character device.
+    -->
+    <method name="SendBreak"/>
+
+    <!--
+        Name:
+
+        The FQDN name to identify the kind of stream. See :ref:`reserved
+        names<dbus-chardev-fqdn>`.
+    -->
+    <property name="Name" type="s" access="read"/>
+
+    <!--
+        FEOpened:
+
+        Whether the front-end side is opened.
+    -->
+    <property name="FEOpened" type="b" access="read"/>
+
+    <!--
+        Echo:
+
+        Whether the input should be echo'ed (for serial streams).
+    -->
+    <property name="Echo" type="b" access="read"/>
+
+    <!--
+        Owner:
+
+        The D-Bus unique name of the registered handler.
+    -->
+    <property name="Owner" type="s" access="read"/>
+  </interface>
+</node>

ui/dbus-error.c

@@ -0,0 +1,48 @@
+/*
+ * QEMU DBus display errors
+ *
+ * Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "qemu/osdep.h"
+#include "dbus.h"
+
+static const GDBusErrorEntry dbus_display_error_entries[] = {
+    { DBUS_DISPLAY_ERROR_FAILED, "org.qemu.Display1.Error.Failed" },
+    { DBUS_DISPLAY_ERROR_INVALID, "org.qemu.Display1.Error.Invalid" },
+    { DBUS_DISPLAY_ERROR_UNSUPPORTED, "org.qemu.Display1.Error.Unsupported" },
+};
+
+G_STATIC_ASSERT(G_N_ELEMENTS(dbus_display_error_entries) ==
+                DBUS_DISPLAY_N_ERRORS);
+
+GQuark
+dbus_display_error_quark(void)
+{
+    static gsize quark;
+
+    g_dbus_error_register_error_domain(
+        "dbus-display-error-quark",
+        &quark,
+        dbus_display_error_entries,
+        G_N_ELEMENTS(dbus_display_error_entries));
+
+    return (GQuark)quark;
+}

ui/dbus-listener.c

@@ -0,0 +1,486 @@
+/*
+ * QEMU DBus display console
+ *
+ * Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "qemu/osdep.h"
+#include "sysemu/sysemu.h"
+#include "dbus.h"
+#include <gio/gunixfdlist.h>
+
+#include "ui/shader.h"
+#include "ui/egl-helpers.h"
+#include "ui/egl-context.h"
+#include "trace.h"
+
+struct _DBusDisplayListener {
+    GObject parent;
+
+    char *bus_name;
+    DBusDisplayConsole *console;
+    GDBusConnection *conn;
+
+    QemuDBusDisplay1Listener *proxy;
+
+    DisplayChangeListener dcl;
+    DisplaySurface *ds;
+    QemuGLShader *gls;
+    int gl_updates;
+};
+
+G_DEFINE_TYPE(DBusDisplayListener, dbus_display_listener, G_TYPE_OBJECT)
+
+static void dbus_update_gl_cb(GObject *source_object,
+                           GAsyncResult *res,
+                           gpointer user_data)
+{
+    g_autoptr(GError) err = NULL;
+    DBusDisplayListener *ddl = user_data;
+
+    if (!qemu_dbus_display1_listener_call_update_dmabuf_finish(ddl->proxy,
+                                                               res, &err)) {
+        error_report("Failed to call update: %s", err->message);
+    }
+
+    graphic_hw_gl_block(ddl->dcl.con, false);
+    g_object_unref(ddl);
+}
+
+static void dbus_call_update_gl(DBusDisplayListener *ddl,
+                                int x, int y, int w, int h)
+{
+    graphic_hw_gl_block(ddl->dcl.con, true);
+    glFlush();
+    qemu_dbus_display1_listener_call_update_dmabuf(ddl->proxy,
+        x, y, w, h,
+        G_DBUS_CALL_FLAGS_NONE,
+        DBUS_DEFAULT_TIMEOUT, NULL,
+        dbus_update_gl_cb,
+        g_object_ref(ddl));
+}
+
+static void dbus_scanout_disable(DisplayChangeListener *dcl)
+{
+    DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
+
+    ddl->ds = NULL;
+    qemu_dbus_display1_listener_call_disable(
+        ddl->proxy, G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+}
+
+static void dbus_scanout_dmabuf(DisplayChangeListener *dcl,
+                                QemuDmaBuf *dmabuf)
+{
+    DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
+    g_autoptr(GError) err = NULL;
+    g_autoptr(GUnixFDList) fd_list = NULL;
+
+    fd_list = g_unix_fd_list_new();
+    if (g_unix_fd_list_append(fd_list, dmabuf->fd, &err) != 0) {
+        error_report("Failed to setup dmabuf fdlist: %s", err->message);
+        return;
+    }
+
+    qemu_dbus_display1_listener_call_scanout_dmabuf(
+        ddl->proxy,
+        g_variant_new_handle(0),
+        dmabuf->width,
+        dmabuf->height,
+        dmabuf->stride,
+        dmabuf->fourcc,
+        dmabuf->modifier,
+        dmabuf->y0_top,
+        G_DBUS_CALL_FLAGS_NONE,
+        -1,
+        fd_list,
+        NULL, NULL, NULL);
+}
+
+static void dbus_scanout_texture(DisplayChangeListener *dcl,
+                                 uint32_t tex_id,
+                                 bool backing_y_0_top,
+                                 uint32_t backing_width,
+                                 uint32_t backing_height,
+                                 uint32_t x, uint32_t y,
+                                 uint32_t w, uint32_t h)
+{
+    QemuDmaBuf dmabuf = {
+        .width = backing_width,
+        .height = backing_height,
+        .y0_top = backing_y_0_top,
+    };
+
+    assert(tex_id);
+    dmabuf.fd = egl_get_fd_for_texture(
+        tex_id, (EGLint *)&dmabuf.stride,
+        (EGLint *)&dmabuf.fourcc,
+        &dmabuf.modifier);
+    if (dmabuf.fd < 0) {
+        error_report("%s: failed to get fd for texture", __func__);
+        return;
+    }
+
+    dbus_scanout_dmabuf(dcl, &dmabuf);
+    close(dmabuf.fd);
+}
+
+static void dbus_cursor_dmabuf(DisplayChangeListener *dcl,
+                               QemuDmaBuf *dmabuf, bool have_hot,
+                               uint32_t hot_x, uint32_t hot_y)
+{
+    DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
+    DisplaySurface *ds;
+    GVariant *v_data = NULL;
+    egl_fb cursor_fb;
+
+    if (!dmabuf) {
+        qemu_dbus_display1_listener_call_mouse_set(
+            ddl->proxy, 0, 0, false,
+            G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+        return;
+    }
+
+    egl_dmabuf_import_texture(dmabuf);
+    if (!dmabuf->texture) {
+        return;
+    }
+    egl_fb_setup_for_tex(&cursor_fb, dmabuf->width, dmabuf->height,
+                         dmabuf->texture, false);
+    ds = qemu_create_displaysurface(dmabuf->width, dmabuf->height);
+    egl_fb_read(ds, &cursor_fb);
+
+    v_data = g_variant_new_from_data(
+        G_VARIANT_TYPE("ay"),
+        surface_data(ds),
+        surface_width(ds) * surface_height(ds) * 4,
+        TRUE,
+        (GDestroyNotify)qemu_free_displaysurface,
+        ds);
+    qemu_dbus_display1_listener_call_cursor_define(
+        ddl->proxy,
+        surface_width(ds),
+        surface_height(ds),
+        hot_x,
+        hot_y,
+        v_data,
+        G_DBUS_CALL_FLAGS_NONE,
+        -1,
+        NULL,
+        NULL,
+        NULL);
+}
+
+static void dbus_cursor_position(DisplayChangeListener *dcl,
+                                 uint32_t pos_x, uint32_t pos_y)
+{
+    DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
+
+    qemu_dbus_display1_listener_call_mouse_set(
+        ddl->proxy, pos_x, pos_y, true,
+        G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+}
+
+static void dbus_release_dmabuf(DisplayChangeListener *dcl,
+                                QemuDmaBuf *dmabuf)
+{
+    dbus_scanout_disable(dcl);
+}
+
+static void dbus_scanout_update(DisplayChangeListener *dcl,
+                                uint32_t x, uint32_t y,
+                                uint32_t w, uint32_t h)
+{
+    DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
+
+    dbus_call_update_gl(ddl, x, y, w, h);
+}
+
+static void dbus_gl_refresh(DisplayChangeListener *dcl)
+{
+    DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
+
+    graphic_hw_update(dcl->con);
+
+    if (!ddl->ds || qemu_console_is_gl_blocked(ddl->dcl.con)) {
+        return;
+    }
+
+    if (ddl->gl_updates) {
+        dbus_call_update_gl(ddl, 0, 0,
+                            surface_width(ddl->ds), surface_height(ddl->ds));
+        ddl->gl_updates = 0;
+    }
+}
+
+static void dbus_refresh(DisplayChangeListener *dcl)
+{
+    graphic_hw_update(dcl->con);
+}
+
+static void dbus_gl_gfx_update(DisplayChangeListener *dcl,
+                               int x, int y, int w, int h)
+{
+    DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
+
+    if (ddl->ds) {
+        surface_gl_update_texture(ddl->gls, ddl->ds, x, y, w, h);
+    }
+
+    ddl->gl_updates++;
+}
+
+static void dbus_gfx_update(DisplayChangeListener *dcl,
+                            int x, int y, int w, int h)
+{
+    DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
+    pixman_image_t *img;
+    GVariant *v_data;
+    size_t stride;
+
+    assert(ddl->ds);
+    stride = w * DIV_ROUND_UP(PIXMAN_FORMAT_BPP(surface_format(ddl->ds)), 8);
+
+    trace_dbus_update(x, y, w, h);
+
+    /* make a copy, since gvariant only handles linear data */
+    img = pixman_image_create_bits(surface_format(ddl->ds),
+                                   w, h, NULL, stride);
+    pixman_image_composite(PIXMAN_OP_SRC, ddl->ds->image, NULL, img,
+                           x, y, 0, 0, 0, 0, w, h);
+
+    v_data = g_variant_new_from_data(
+        G_VARIANT_TYPE("ay"),
+        pixman_image_get_data(img),
+        pixman_image_get_stride(img) * h,
+        TRUE,
+        (GDestroyNotify)pixman_image_unref,
+        img);
+    qemu_dbus_display1_listener_call_update(ddl->proxy,
+        x, y, w, h, pixman_image_get_stride(img), pixman_image_get_format(img),
+        v_data,
+        G_DBUS_CALL_FLAGS_NONE,
+        DBUS_DEFAULT_TIMEOUT, NULL, NULL, NULL);
+}
+
+static void dbus_gl_gfx_switch(DisplayChangeListener *dcl,
+                               struct DisplaySurface *new_surface)
+{
+    DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
+
+    if (ddl->ds) {
+        surface_gl_destroy_texture(ddl->gls, ddl->ds);
+    }
+    ddl->ds = new_surface;
+    if (ddl->ds) {
+        int width = surface_width(ddl->ds);
+        int height = surface_height(ddl->ds);
+
+        surface_gl_create_texture(ddl->gls, ddl->ds);
+        /* TODO: lazy send dmabuf (there are unnecessary sent otherwise) */
+        dbus_scanout_texture(&ddl->dcl, ddl->ds->texture, false,
+                             width, height, 0, 0, width, height);
+    }
+}
+
+static void dbus_gfx_switch(DisplayChangeListener *dcl,
+                            struct DisplaySurface *new_surface)
+{
+    DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
+    GVariant *v_data = NULL;
+
+    ddl->ds = new_surface;
+    if (!ddl->ds) {
+        /* why not call disable instead? */
+        return;
+    }
+
+    v_data = g_variant_new_from_data(
+        G_VARIANT_TYPE("ay"),
+        surface_data(ddl->ds),
+        surface_stride(ddl->ds) * surface_height(ddl->ds),
+        TRUE,
+        (GDestroyNotify)pixman_image_unref,
+        pixman_image_ref(ddl->ds->image));
+    qemu_dbus_display1_listener_call_scanout(ddl->proxy,
+        surface_width(ddl->ds),
+        surface_height(ddl->ds),
+        surface_stride(ddl->ds),
+        surface_format(ddl->ds),
+        v_data,
+        G_DBUS_CALL_FLAGS_NONE,
+        DBUS_DEFAULT_TIMEOUT, NULL, NULL, NULL);
+}
+
+static void dbus_mouse_set(DisplayChangeListener *dcl,
+                           int x, int y, int on)
+{
+    DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
+
+    qemu_dbus_display1_listener_call_mouse_set(
+        ddl->proxy, x, y, on, G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL, NULL);
+}
+
+static void dbus_cursor_define(DisplayChangeListener *dcl,
+                               QEMUCursor *c)
+{
+    DBusDisplayListener *ddl = container_of(dcl, DBusDisplayListener, dcl);
+    GVariant *v_data = NULL;
+
+    cursor_get(c);
+    v_data = g_variant_new_from_data(
+        G_VARIANT_TYPE("ay"),
+        c->data,
+        c->width * c->height * 4,
+        TRUE,
+        (GDestroyNotify)cursor_put,
+        c);
+
+    qemu_dbus_display1_listener_call_cursor_define(
+        ddl->proxy,
+        c->width,
+        c->height,
+        c->hot_x,
+        c->hot_y,
+        v_data,
+        G_DBUS_CALL_FLAGS_NONE,
+        -1,
+        NULL,
+        NULL,
+        NULL);
+}
+
+const DisplayChangeListenerOps dbus_gl_dcl_ops = {
+    .dpy_name                = "dbus-gl",
+    .dpy_gfx_update          = dbus_gl_gfx_update,
+    .dpy_gfx_switch          = dbus_gl_gfx_switch,
+    .dpy_gfx_check_format    = console_gl_check_format,
+    .dpy_refresh             = dbus_gl_refresh,
+    .dpy_mouse_set           = dbus_mouse_set,
+    .dpy_cursor_define       = dbus_cursor_define,
+
+    .dpy_gl_scanout_disable  = dbus_scanout_disable,
+    .dpy_gl_scanout_texture  = dbus_scanout_texture,
+    .dpy_gl_scanout_dmabuf   = dbus_scanout_dmabuf,
+    .dpy_gl_cursor_dmabuf    = dbus_cursor_dmabuf,
+    .dpy_gl_cursor_position  = dbus_cursor_position,
+    .dpy_gl_release_dmabuf   = dbus_release_dmabuf,
+    .dpy_gl_update           = dbus_scanout_update,
+};
+
+const DisplayChangeListenerOps dbus_dcl_ops = {
+    .dpy_name                = "dbus",
+    .dpy_gfx_update          = dbus_gfx_update,
+    .dpy_gfx_switch          = dbus_gfx_switch,
+    .dpy_refresh             = dbus_refresh,
+    .dpy_mouse_set           = dbus_mouse_set,
+    .dpy_cursor_define       = dbus_cursor_define,
+};
+
+static void
+dbus_display_listener_dispose(GObject *object)
+{
+    DBusDisplayListener *ddl = DBUS_DISPLAY_LISTENER(object);
+
+    unregister_displaychangelistener(&ddl->dcl);
+    g_clear_object(&ddl->conn);
+    g_clear_pointer(&ddl->bus_name, g_free);
+    g_clear_object(&ddl->proxy);
+    g_clear_pointer(&ddl->gls, qemu_gl_fini_shader);
+
+    G_OBJECT_CLASS(dbus_display_listener_parent_class)->dispose(object);
+}
+
+static void
+dbus_display_listener_constructed(GObject *object)
+{
+    DBusDisplayListener *ddl = DBUS_DISPLAY_LISTENER(object);
+
+    if (display_opengl) {
+        ddl->gls = qemu_gl_init_shader();
+        ddl->dcl.ops = &dbus_gl_dcl_ops;
+    } else {
+        ddl->dcl.ops = &dbus_dcl_ops;
+    }
+
+    G_OBJECT_CLASS(dbus_display_listener_parent_class)->constructed(object);
+}
+
+static void
+dbus_display_listener_class_init(DBusDisplayListenerClass *klass)
+{
+    GObjectClass *object_class = G_OBJECT_CLASS(klass);
+
+    object_class->dispose = dbus_display_listener_dispose;
+    object_class->constructed = dbus_display_listener_constructed;
+}
+
+static void
+dbus_display_listener_init(DBusDisplayListener *ddl)
+{
+}
+
+const char *
+dbus_display_listener_get_bus_name(DBusDisplayListener *ddl)
+{
+    return ddl->bus_name ?: "p2p";
+}
+
+DBusDisplayConsole *
+dbus_display_listener_get_console(DBusDisplayListener *ddl)
+{
+    return ddl->console;
+}
+
+DBusDisplayListener *
+dbus_display_listener_new(const char *bus_name,
+                          GDBusConnection *conn,
+                          DBusDisplayConsole *console)
+{
+    DBusDisplayListener *ddl;
+    QemuConsole *con;
+    g_autoptr(GError) err = NULL;
+
+    ddl = g_object_new(DBUS_DISPLAY_TYPE_LISTENER, NULL);
+    ddl->proxy =
+        qemu_dbus_display1_listener_proxy_new_sync(conn,
+            G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START,
+            NULL,
+            "/org/qemu/Display1/Listener",
+            NULL,
+            &err);
+    if (!ddl->proxy) {
+        error_report("Failed to setup proxy: %s", err->message);
+        g_object_unref(conn);
+        g_object_unref(ddl);
+        return NULL;
+    }
+
+    ddl->bus_name = g_strdup(bus_name);
+    ddl->conn = conn;
+    ddl->console = console;
+
+    con = qemu_console_lookup_by_index(dbus_display_console_get_index(console));
+    assert(con);
+    ddl->dcl.con = con;
+    register_displaychangelistener(&ddl->dcl);
+
+    return ddl;
+}

ui/dbus-module.c

@@ -0,0 +1,35 @@
+/*
+ * D-Bus module support.
+ *
+ * Copyright (C) 2021 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 or
+ * (at your option) version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "ui/dbus-module.h"
+
+int using_dbus_display;
+
+static bool
+qemu_dbus_display_add_client(int csock, Error **errp)
+{
+    error_setg(errp, "D-Bus display isn't enabled");
+    return false;
+}
+
+struct QemuDBusDisplayOps qemu_dbus_display = {
+    .add_client = qemu_dbus_display_add_client,
+};

ui/dbus.c

@@ -0,0 +1,482 @@
+/*
+ * QEMU DBus display
+ *
+ * Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "qemu/dbus.h"
+#include "qemu/main-loop.h"
+#include "qemu/option.h"
+#include "qom/object_interfaces.h"
+#include "sysemu/sysemu.h"
+#include "ui/dbus-module.h"
+#include "ui/egl-helpers.h"
+#include "ui/egl-context.h"
+#include "audio/audio.h"
+#include "audio/audio_int.h"
+#include "qapi/error.h"
+#include "trace.h"
+
+#include "dbus.h"
+
+static DBusDisplay *dbus_display;
+
+static QEMUGLContext dbus_create_context(DisplayGLCtx *dgc,
+                                         QEMUGLParams *params)
+{
+    eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
+                   qemu_egl_rn_ctx);
+    return qemu_egl_create_context(dgc, params);
+}
+
+static const DisplayGLCtxOps dbus_gl_ops = {
+    .compatible_dcl          = &dbus_gl_dcl_ops,
+    .dpy_gl_ctx_create       = dbus_create_context,
+    .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
+    .dpy_gl_ctx_make_current = qemu_egl_make_context_current,
+};
+
+static NotifierList dbus_display_notifiers =
+    NOTIFIER_LIST_INITIALIZER(dbus_display_notifiers);
+
+void
+dbus_display_notifier_add(Notifier *notifier)
+{
+    notifier_list_add(&dbus_display_notifiers, notifier);
+}
+
+static void
+dbus_display_notifier_remove(Notifier *notifier)
+{
+    notifier_remove(notifier);
+}
+
+void
+dbus_display_notify(DBusDisplayEvent *event)
+{
+    notifier_list_notify(&dbus_display_notifiers, event);
+}
+
+static void
+dbus_display_init(Object *o)
+{
+    DBusDisplay *dd = DBUS_DISPLAY(o);
+    g_autoptr(GDBusObjectSkeleton) vm = NULL;
+
+    dd->glctx.ops = &dbus_gl_ops;
+    dd->iface = qemu_dbus_display1_vm_skeleton_new();
+    dd->consoles = g_ptr_array_new_with_free_func(g_object_unref);
+
+    dd->server = g_dbus_object_manager_server_new(DBUS_DISPLAY1_ROOT);
+
+    vm = g_dbus_object_skeleton_new(DBUS_DISPLAY1_ROOT "/VM");
+    g_dbus_object_skeleton_add_interface(
+        vm, G_DBUS_INTERFACE_SKELETON(dd->iface));
+    g_dbus_object_manager_server_export(dd->server, vm);
+
+    dbus_clipboard_init(dd);
+    dbus_chardev_init(dd);
+}
+
+static void
+dbus_display_finalize(Object *o)
+{
+    DBusDisplay *dd = DBUS_DISPLAY(o);
+
+    if (dd->notifier.notify) {
+        dbus_display_notifier_remove(&dd->notifier);
+    }
+
+    qemu_clipboard_peer_unregister(&dd->clipboard_peer);
+    g_clear_object(&dd->clipboard);
+
+    g_clear_object(&dd->server);
+    g_clear_pointer(&dd->consoles, g_ptr_array_unref);
+    if (dd->add_client_cancellable) {
+        g_cancellable_cancel(dd->add_client_cancellable);
+    }
+    g_clear_object(&dd->add_client_cancellable);
+    g_clear_object(&dd->bus);
+    g_clear_object(&dd->iface);
+    g_free(dd->dbus_addr);
+    g_free(dd->audiodev);
+    dbus_display = NULL;
+}
+
+static bool
+dbus_display_add_console(DBusDisplay *dd, int idx, Error **errp)
+{
+    QemuConsole *con;
+    DBusDisplayConsole *dbus_console;
+
+    con = qemu_console_lookup_by_index(idx);
+    assert(con);
+
+    if (qemu_console_is_graphic(con) &&
+        dd->gl_mode != DISPLAYGL_MODE_OFF) {
+        qemu_console_set_display_gl_ctx(con, &dd->glctx);
+    }
+
+    dbus_console = dbus_display_console_new(dd, con);
+    g_ptr_array_insert(dd->consoles, idx, dbus_console);
+    g_dbus_object_manager_server_export(dd->server,
+                                        G_DBUS_OBJECT_SKELETON(dbus_console));
+    return true;
+}
+
+static void
+dbus_display_complete(UserCreatable *uc, Error **errp)
+{
+    DBusDisplay *dd = DBUS_DISPLAY(uc);
+    g_autoptr(GError) err = NULL;
+    g_autofree char *uuid = qemu_uuid_unparse_strdup(&qemu_uuid);
+    g_autoptr(GArray) consoles = NULL;
+    GVariant *console_ids;
+    int idx;
+
+    if (!object_resolve_path_type("", TYPE_DBUS_DISPLAY, NULL)) {
+        error_setg(errp, "There is already an instance of %s",
+                   TYPE_DBUS_DISPLAY);
+        return;
+    }
+
+    if (dd->p2p) {
+        /* wait for dbus_display_add_client() */
+        dbus_display = dd;
+    } else if (dd->dbus_addr && *dd->dbus_addr) {
+        dd->bus = g_dbus_connection_new_for_address_sync(dd->dbus_addr,
+                        G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT |
+                        G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION,
+                        NULL, NULL, &err);
+    } else {
+        dd->bus = g_bus_get_sync(G_BUS_TYPE_SESSION, NULL, &err);
+    }
+    if (err) {
+        error_setg(errp, "failed to connect to DBus: %s", err->message);
+        return;
+    }
+
+    if (dd->audiodev && *dd->audiodev) {
+        AudioState *audio_state = audio_state_by_name(dd->audiodev);
+        if (!audio_state) {
+            error_setg(errp, "Audiodev '%s' not found", dd->audiodev);
+            return;
+        }
+        if (!g_str_equal(audio_state->drv->name, "dbus")) {
+            error_setg(errp, "Audiodev '%s' is not compatible with DBus",
+                       dd->audiodev);
+            return;
+        }
+        audio_state->drv->set_dbus_server(audio_state, dd->server);
+    }
+
+    consoles = g_array_new(FALSE, FALSE, sizeof(guint32));
+    for (idx = 0;; idx++) {
+        if (!qemu_console_lookup_by_index(idx)) {
+            break;
+        }
+        if (!dbus_display_add_console(dd, idx, errp)) {
+            return;
+        }
+        g_array_append_val(consoles, idx);
+    }
+
+    console_ids = g_variant_new_from_data(
+        G_VARIANT_TYPE("au"),
+        consoles->data, consoles->len * sizeof(guint32), TRUE,
+        (GDestroyNotify)g_array_unref, consoles);
+    g_steal_pointer(&consoles);
+    g_object_set(dd->iface,
+                 "name", qemu_name ?: "QEMU " QEMU_VERSION,
+                 "uuid", uuid,
+                 "console-ids", console_ids,
+                 NULL);
+
+    if (dd->bus) {
+        g_dbus_object_manager_server_set_connection(dd->server, dd->bus);
+        g_bus_own_name_on_connection(dd->bus, "org.qemu",
+                                     G_BUS_NAME_OWNER_FLAGS_NONE,
+                                     NULL, NULL, NULL, NULL);
+    }
+}
+
+static void
+dbus_display_add_client_ready(GObject *source_object,
+                              GAsyncResult *res,
+                              gpointer user_data)
+{
+    g_autoptr(GError) err = NULL;
+    g_autoptr(GDBusConnection) conn = NULL;
+
+    g_clear_object(&dbus_display->add_client_cancellable);
+
+    conn = g_dbus_connection_new_finish(res, &err);
+    if (!conn) {
+        error_printf("Failed to accept D-Bus client: %s", err->message);
+    }
+
+    g_dbus_object_manager_server_set_connection(dbus_display->server, conn);
+}
+
+
+static bool
+dbus_display_add_client(int csock, Error **errp)
+{
+    g_autoptr(GError) err = NULL;
+    g_autoptr(GSocket) socket = NULL;
+    g_autoptr(GSocketConnection) conn = NULL;
+    g_autofree char *guid = g_dbus_generate_guid();
+
+    if (!dbus_display) {
+        error_setg(errp, "p2p connections not accepted in bus mode");
+        return false;
+    }
+
+    if (dbus_display->add_client_cancellable) {
+        g_cancellable_cancel(dbus_display->add_client_cancellable);
+    }
+
+    socket = g_socket_new_from_fd(csock, &err);
+    if (!socket) {
+        error_setg(errp, "Failed to setup D-Bus socket: %s", err->message);
+        return false;
+    }
+
+    conn = g_socket_connection_factory_create_connection(socket);
+
+    dbus_display->add_client_cancellable = g_cancellable_new();
+
+    g_dbus_connection_new(G_IO_STREAM(conn),
+                          guid,
+                          G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER,
+                          NULL,
+                          dbus_display->add_client_cancellable,
+                          dbus_display_add_client_ready,
+                          NULL);
+
+    return true;
+}
+
+static bool
+get_dbus_p2p(Object *o, Error **errp)
+{
+    DBusDisplay *dd = DBUS_DISPLAY(o);
+
+    return dd->p2p;
+}
+
+static void
+set_dbus_p2p(Object *o, bool p2p, Error **errp)
+{
+    DBusDisplay *dd = DBUS_DISPLAY(o);
+
+    dd->p2p = p2p;
+}
+
+static char *
+get_dbus_addr(Object *o, Error **errp)
+{
+    DBusDisplay *dd = DBUS_DISPLAY(o);
+
+    return g_strdup(dd->dbus_addr);
+}
+
+static void
+set_dbus_addr(Object *o, const char *str, Error **errp)
+{
+    DBusDisplay *dd = DBUS_DISPLAY(o);
+
+    g_free(dd->dbus_addr);
+    dd->dbus_addr = g_strdup(str);
+}
+
+static char *
+get_audiodev(Object *o, Error **errp)
+{
+    DBusDisplay *dd = DBUS_DISPLAY(o);
+
+    return g_strdup(dd->audiodev);
+}
+
+static void
+set_audiodev(Object *o, const char *str, Error **errp)
+{
+    DBusDisplay *dd = DBUS_DISPLAY(o);
+
+    g_free(dd->audiodev);
+    dd->audiodev = g_strdup(str);
+}
+
+
+static int
+get_gl_mode(Object *o, Error **errp)
+{
+    DBusDisplay *dd = DBUS_DISPLAY(o);
+
+    return dd->gl_mode;
+}
+
+static void
+set_gl_mode(Object *o, int val, Error **errp)
+{
+    DBusDisplay *dd = DBUS_DISPLAY(o);
+
+    dd->gl_mode = val;
+}
+
+static void
+dbus_display_class_init(ObjectClass *oc, void *data)
+{
+    UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
+
+    ucc->complete = dbus_display_complete;
+    object_class_property_add_bool(oc, "p2p", get_dbus_p2p, set_dbus_p2p);
+    object_class_property_add_str(oc, "addr", get_dbus_addr, set_dbus_addr);
+    object_class_property_add_str(oc, "audiodev", get_audiodev, set_audiodev);
+    object_class_property_add_enum(oc, "gl-mode",
+                                   "DisplayGLMode", &DisplayGLMode_lookup,
+                                   get_gl_mode, set_gl_mode);
+}
+
+#define TYPE_CHARDEV_VC "chardev-vc"
+
+typedef struct DBusVCClass {
+    DBusChardevClass parent_class;
+
+    void (*parent_parse)(QemuOpts *opts, ChardevBackend *b, Error **errp);
+} DBusVCClass;
+
+DECLARE_CLASS_CHECKERS(DBusVCClass, DBUS_VC,
+                       TYPE_CHARDEV_VC)
+
+static void
+dbus_vc_parse(QemuOpts *opts, ChardevBackend *backend,
+              Error **errp)
+{
+    DBusVCClass *klass = DBUS_VC_CLASS(object_class_by_name(TYPE_CHARDEV_VC));
+    const char *name = qemu_opt_get(opts, "name");
+    const char *id = qemu_opts_id(opts);
+
+    if (name == NULL) {
+        if (g_str_has_prefix(id, "compat_monitor")) {
+            name = "org.qemu.monitor.hmp.0";
+        } else if (g_str_has_prefix(id, "serial")) {
+            name = "org.qemu.console.serial.0";
+        } else {
+            name = "";
+        }
+        if (!qemu_opt_set(opts, "name", name, errp)) {
+            return;
+        }
+    }
+
+    klass->parent_parse(opts, backend, errp);
+}
+
+static void
+dbus_vc_class_init(ObjectClass *oc, void *data)
+{
+    DBusVCClass *klass = DBUS_VC_CLASS(oc);
+    ChardevClass *cc = CHARDEV_CLASS(oc);
+
+    klass->parent_parse = cc->parse;
+    cc->parse = dbus_vc_parse;
+}
+
+static const TypeInfo dbus_vc_type_info = {
+    .name = TYPE_CHARDEV_VC,
+    .parent = TYPE_CHARDEV_DBUS,
+    .class_init = dbus_vc_class_init,
+};
+
+static void
+early_dbus_init(DisplayOptions *opts)
+{
+    DisplayGLMode mode = opts->has_gl ? opts->gl : DISPLAYGL_MODE_OFF;
+
+    if (mode != DISPLAYGL_MODE_OFF) {
+        if (egl_rendernode_init(opts->u.dbus.rendernode, mode) < 0) {
+            error_report("dbus: render node init failed");
+            exit(1);
+        }
+
+        display_opengl = 1;
+    }
+
+    type_register(&dbus_vc_type_info);
+}
+
+static void
+dbus_init(DisplayState *ds, DisplayOptions *opts)
+{
+    DisplayGLMode mode = opts->has_gl ? opts->gl : DISPLAYGL_MODE_OFF;
+
+    if (opts->u.dbus.addr && opts->u.dbus.p2p) {
+        error_report("dbus: can't accept both addr=X and p2p=yes options");
+        exit(1);
+    }
+
+    using_dbus_display = 1;
+
+    object_new_with_props(TYPE_DBUS_DISPLAY,
+                          object_get_objects_root(),
+                          "dbus-display", &error_fatal,
+                          "addr", opts->u.dbus.addr ?: "",
+                          "audiodev", opts->u.dbus.audiodev ?: "",
+                          "gl-mode", DisplayGLMode_str(mode),
+                          "p2p", yes_no(opts->u.dbus.p2p),
+                          NULL);
+}
+
+static const TypeInfo dbus_display_info = {
+    .name = TYPE_DBUS_DISPLAY,
+    .parent = TYPE_OBJECT,
+    .instance_size = sizeof(DBusDisplay),
+    .instance_init = dbus_display_init,
+    .instance_finalize = dbus_display_finalize,
+    .class_init = dbus_display_class_init,
+    .interfaces = (InterfaceInfo[]) {
+        { TYPE_USER_CREATABLE },
+        { }
+    }
+};
+
+static QemuDisplay qemu_display_dbus = {
+    .type       = DISPLAY_TYPE_DBUS,
+    .early_init = early_dbus_init,
+    .init       = dbus_init,
+};
+
+static void register_dbus(void)
+{
+    qemu_dbus_display = (struct QemuDBusDisplayOps) {
+        .add_client = dbus_display_add_client,
+    };
+    type_register_static(&dbus_display_info);
+    qemu_display_register(&qemu_display_dbus);
+}
+
+type_init(register_dbus);
+
+#ifdef CONFIG_OPENGL
+module_dep("ui-opengl");
+#endif

ui/dbus.h

@@ -0,0 +1,144 @@
+/*
+ * QEMU DBus display
+ *
+ * Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef UI_DBUS_H_
+#define UI_DBUS_H_
+
+#include "chardev/char-socket.h"
+#include "qemu/dbus.h"
+#include "qom/object.h"
+#include "ui/console.h"
+#include "ui/clipboard.h"
+
+#include "dbus-display1.h"
+
+typedef struct DBusClipboardRequest {
+    GDBusMethodInvocation *invocation;
+    QemuClipboardType type;
+    guint timeout_id;
+} DBusClipboardRequest;
+
+struct DBusDisplay {
+    Object parent;
+
+    DisplayGLMode gl_mode;
+    bool p2p;
+    char *dbus_addr;
+    char *audiodev;
+    DisplayGLCtx glctx;
+
+    GDBusConnection *bus;
+    GDBusObjectManagerServer *server;
+    QemuDBusDisplay1VM *iface;
+    GPtrArray *consoles;
+    GCancellable *add_client_cancellable;
+
+    QemuClipboardPeer clipboard_peer;
+    QemuDBusDisplay1Clipboard *clipboard;
+    QemuDBusDisplay1Clipboard *clipboard_proxy;
+    DBusClipboardRequest clipboard_request[QEMU_CLIPBOARD_SELECTION__COUNT];
+
+    Notifier notifier;
+};
+
+#define TYPE_DBUS_DISPLAY "dbus-display"
+OBJECT_DECLARE_SIMPLE_TYPE(DBusDisplay, DBUS_DISPLAY)
+
+void dbus_display_notifier_add(Notifier *notifier);
+
+#define DBUS_DISPLAY_TYPE_CONSOLE dbus_display_console_get_type()
+G_DECLARE_FINAL_TYPE(DBusDisplayConsole,
+                     dbus_display_console,
+                     DBUS_DISPLAY,
+                     CONSOLE,
+                     GDBusObjectSkeleton)
+
+DBusDisplayConsole *
+dbus_display_console_new(DBusDisplay *display, QemuConsole *con);
+
+int
+dbus_display_console_get_index(DBusDisplayConsole *ddc);
+
+#define DBUS_DISPLAY_TYPE_LISTENER dbus_display_listener_get_type()
+G_DECLARE_FINAL_TYPE(DBusDisplayListener,
+                     dbus_display_listener,
+                     DBUS_DISPLAY,
+                     LISTENER,
+                     GObject)
+
+DBusDisplayListener *
+dbus_display_listener_new(const char *bus_name,
+                          GDBusConnection *conn,
+                          DBusDisplayConsole *console);
+
+DBusDisplayConsole *
+dbus_display_listener_get_console(DBusDisplayListener *ddl);
+
+const char *
+dbus_display_listener_get_bus_name(DBusDisplayListener *ddl);
+
+extern const DisplayChangeListenerOps dbus_gl_dcl_ops;
+extern const DisplayChangeListenerOps dbus_dcl_ops;
+
+#define TYPE_CHARDEV_DBUS "chardev-dbus"
+
+typedef struct DBusChardevClass {
+    SocketChardevClass parent_class;
+
+    void (*parent_chr_be_event)(Chardev *s, QEMUChrEvent event);
+} DBusChardevClass;
+
+DECLARE_CLASS_CHECKERS(DBusChardevClass, DBUS_CHARDEV,
+                       TYPE_CHARDEV_DBUS)
+
+typedef struct DBusChardev {
+    SocketChardev parent;
+
+    bool exported;
+    QemuDBusDisplay1Chardev *iface;
+} DBusChardev;
+
+DECLARE_INSTANCE_CHECKER(DBusChardev, DBUS_CHARDEV, TYPE_CHARDEV_DBUS)
+
+#define CHARDEV_IS_DBUS(chr) \
+    object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_DBUS)
+
+typedef enum {
+    DBUS_DISPLAY_CHARDEV_OPEN,
+    DBUS_DISPLAY_CHARDEV_CLOSE,
+} DBusDisplayEventType;
+
+typedef struct DBusDisplayEvent {
+    DBusDisplayEventType type;
+    union {
+        DBusChardev *chardev;
+    };
+} DBusDisplayEvent;
+
+void dbus_display_notify(DBusDisplayEvent *event);
+
+void dbus_chardev_init(DBusDisplay *dpy);
+
+void dbus_clipboard_init(DBusDisplay *dpy);
+
+#endif /* UI_DBUS_H_ */

ui/egl-context.c

@@ -1,7 +1,7 @@
 #include "qemu/osdep.h"
 #include "ui/egl-context.h"
 
-QEMUGLContext qemu_egl_create_context(DisplayChangeListener *dcl,
+QEMUGLContext qemu_egl_create_context(DisplayGLCtx *dgc,
                                       QEMUGLParams *params)
 {
    EGLContext ctx;
@@ -24,12 +24,12 @@ QEMUGLContext qemu_egl_create_context(DisplayChangeListener *dcl,
    return ctx;
 }
 
-void qemu_egl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
+void qemu_egl_destroy_context(DisplayGLCtx *dgc, QEMUGLContext ctx)
 {
     eglDestroyContext(qemu_egl_display, ctx);
 }
 
-int qemu_egl_make_context_current(DisplayChangeListener *dcl,
+int qemu_egl_make_context_current(DisplayGLCtx *dgc,
                                   QEMUGLContext ctx)
 {
    return eglMakeCurrent(qemu_egl_display,

ui/egl-headless.c

@@ -38,12 +38,12 @@ static void egl_gfx_switch(DisplayChangeListener *dcl,
     edpy->ds = new_surface;
 }
 
-static QEMUGLContext egl_create_context(DisplayChangeListener *dcl,
+static QEMUGLContext egl_create_context(DisplayGLCtx *dgc,
                                         QEMUGLParams *params)
 {
     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
                    qemu_egl_rn_ctx);
-    return qemu_egl_create_context(dcl, params);
+    return qemu_egl_create_context(dgc, params);
 }
 
 static void egl_scanout_disable(DisplayChangeListener *dcl)
@@ -157,10 +157,6 @@ static const DisplayChangeListenerOps egl_ops = {
     .dpy_gfx_update          = egl_gfx_update,
     .dpy_gfx_switch          = egl_gfx_switch,
 
-    .dpy_gl_ctx_create       = egl_create_context,
-    .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
-    .dpy_gl_ctx_make_current = qemu_egl_make_context_current,
-
     .dpy_gl_scanout_disable  = egl_scanout_disable,
     .dpy_gl_scanout_texture  = egl_scanout_texture,
     .dpy_gl_scanout_dmabuf   = egl_scanout_dmabuf,
@@ -170,6 +166,13 @@ static const DisplayChangeListenerOps egl_ops = {
     .dpy_gl_update           = egl_scanout_flush,
 };
 
+static const DisplayGLCtxOps eglctx_ops = {
+    .compatible_dcl          = &egl_ops,
+    .dpy_gl_ctx_create       = egl_create_context,
+    .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
+    .dpy_gl_ctx_make_current = qemu_egl_make_context_current,
+};
+
 static void early_egl_headless_init(DisplayOptions *opts)
 {
     display_opengl = 1;
@@ -188,6 +191,8 @@ static void egl_headless_init(DisplayState *ds, DisplayOptions *opts)
     }
 
     for (idx = 0;; idx++) {
+        DisplayGLCtx *ctx;
+
         con = qemu_console_lookup_by_index(idx);
         if (!con || !qemu_console_is_graphic(con)) {
             break;
@@ -197,6 +202,9 @@ static void egl_headless_init(DisplayState *ds, DisplayOptions *opts)
         edpy->dcl.con = con;
         edpy->dcl.ops = &egl_ops;
         edpy->gls = qemu_gl_init_shader();
+        ctx = g_new0(DisplayGLCtx, 1);
+        ctx->ops = &eglctx_ops;
+        qemu_console_set_display_gl_ctx(con, ctx);
         register_displaychangelistener(&edpy->dcl);
     }
 }

ui/gtk-clipboard.c

@@ -74,10 +74,9 @@ static void gd_clipboard_clear(GtkClipboard *clipboard,
     gd->cbowner[s] = false;
 }
 
-static void gd_clipboard_notify(Notifier *notifier, void *data)
+static void gd_clipboard_update_info(GtkDisplayState *gd,
+                                     QemuClipboardInfo *info)
 {
-    GtkDisplayState *gd = container_of(notifier, GtkDisplayState, cbpeer.update);
-    QemuClipboardInfo *info = data;
     QemuClipboardSelection s = info->selection;
     bool self_update = info->owner == &gd->cbpeer;
 
@@ -118,6 +117,22 @@ static void gd_clipboard_notify(Notifier *notifier, void *data)
      */
 }
 
+static void gd_clipboard_notify(Notifier *notifier, void *data)
+{
+    GtkDisplayState *gd =
+        container_of(notifier, GtkDisplayState, cbpeer.notifier);
+    QemuClipboardNotify *notify = data;
+
+    switch (notify->type) {
+    case QEMU_CLIPBOARD_UPDATE_INFO:
+        gd_clipboard_update_info(gd, notify->info);
+        return;
+    case QEMU_CLIPBOARD_RESET_SERIAL:
+        /* ignore */
+        return;
+    }
+}
+
 static void gd_clipboard_request(QemuClipboardInfo *info,
                                  QemuClipboardType type)
 {
@@ -172,7 +187,7 @@ static void gd_owner_change(GtkClipboard *clipboard,
 void gd_clipboard_init(GtkDisplayState *gd)
 {
     gd->cbpeer.name = "gtk";
-    gd->cbpeer.update.notify = gd_clipboard_notify;
+    gd->cbpeer.notifier.notify = gd_clipboard_notify;
     gd->cbpeer.request = gd_clipboard_request;
     qemu_clipboard_peer_register(&gd->cbpeer);
 

ui/gtk-egl.c

@@ -119,8 +119,6 @@ void gd_egl_draw(VirtualConsole *vc)
 
         glFlush();
     }
-
-    graphic_hw_gl_flushed(vc->gfx.dcl.con);
 }
 
 void gd_egl_update(DisplayChangeListener *dcl,
@@ -199,14 +197,14 @@ void gd_egl_switch(DisplayChangeListener *dcl,
     }
 }
 
-QEMUGLContext gd_egl_create_context(DisplayChangeListener *dcl,
+QEMUGLContext gd_egl_create_context(DisplayGLCtx *dgc,
                                     QEMUGLParams *params)
 {
-    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
+    VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 
     eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
                    vc->gfx.esurface, vc->gfx.ectx);
-    return qemu_egl_create_context(dcl, params);
+    return qemu_egl_create_context(dgc, params);
 }
 
 void gd_egl_scanout_disable(DisplayChangeListener *dcl)
@@ -362,10 +360,10 @@ void gtk_egl_init(DisplayGLMode mode)
     display_opengl = 1;
 }
 
-int gd_egl_make_current(DisplayChangeListener *dcl,
+int gd_egl_make_current(DisplayGLCtx *dgc,
                         QEMUGLContext ctx)
 {
-    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
+    VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
 
     return eglMakeCurrent(qemu_egl_display, vc->gfx.esurface,
                           vc->gfx.esurface, ctx);

ui/gtk-gl-area.c

@@ -101,8 +101,6 @@ void gd_gl_area_draw(VirtualConsole *vc)
         surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
         surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
     }
-
-    graphic_hw_gl_flushed(vc->gfx.dcl.con);
 }
 
 void gd_gl_area_update(DisplayChangeListener *dcl,
@@ -172,10 +170,10 @@ void gd_gl_area_switch(DisplayChangeListener *dcl,
     }
 }
 
-QEMUGLContext gd_gl_area_create_context(DisplayChangeListener *dcl,
+QEMUGLContext gd_gl_area_create_context(DisplayGLCtx *dgc,
                                         QEMUGLParams *params)
 {
-    VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
+    VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
     GdkWindow *window;
     GdkGLContext *ctx;
     GError *err = NULL;
@@ -201,7 +199,7 @@ QEMUGLContext gd_gl_area_create_context(DisplayChangeListener *dcl,
     return ctx;
 }
 
-void gd_gl_area_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
+void gd_gl_area_destroy_context(DisplayGLCtx *dgc, QEMUGLContext ctx)
 {
     /* FIXME */
 }
@@ -280,7 +278,7 @@ void gtk_gl_area_init(void)
     display_opengl = 1;
 }
 
-int gd_gl_area_make_current(DisplayChangeListener *dcl,
+int gd_gl_area_make_current(DisplayGLCtx *dgc,
                             QEMUGLContext ctx)
 {
     gdk_gl_context_make_current(ctx);

ui/gtk.c

@@ -593,7 +593,6 @@ void gd_hw_gl_flushed(void *vcon)
     close(dmabuf->fence_fd);
     dmabuf->fence_fd = -1;
     graphic_hw_gl_block(vc->gfx.dcl.con, false);
-    graphic_hw_gl_flushed(vc->gfx.dcl.con);
 }
 
 /** DisplayState Callbacks (opengl version) **/
@@ -607,9 +606,6 @@ static const DisplayChangeListenerOps dcl_gl_area_ops = {
     .dpy_mouse_set        = gd_mouse_set,
     .dpy_cursor_define    = gd_cursor_define,
 
-    .dpy_gl_ctx_create       = gd_gl_area_create_context,
-    .dpy_gl_ctx_destroy      = gd_gl_area_destroy_context,
-    .dpy_gl_ctx_make_current = gd_gl_area_make_current,
     .dpy_gl_scanout_texture  = gd_gl_area_scanout_texture,
     .dpy_gl_scanout_disable  = gd_gl_area_scanout_disable,
     .dpy_gl_update           = gd_gl_area_scanout_flush,
@@ -618,8 +614,14 @@ static const DisplayChangeListenerOps dcl_gl_area_ops = {
     .dpy_has_dmabuf          = gd_has_dmabuf,
 };
 
-#ifdef CONFIG_X11
+static const DisplayGLCtxOps gl_area_ctx_ops = {
+    .compatible_dcl          = &dcl_gl_area_ops,
+    .dpy_gl_ctx_create       = gd_gl_area_create_context,
+    .dpy_gl_ctx_destroy      = gd_gl_area_destroy_context,
+    .dpy_gl_ctx_make_current = gd_gl_area_make_current,
+};
 
+#ifdef CONFIG_X11
 static const DisplayChangeListenerOps dcl_egl_ops = {
     .dpy_name             = "gtk-egl",
     .dpy_gfx_update       = gd_egl_update,
@@ -629,9 +631,6 @@ static const DisplayChangeListenerOps dcl_egl_ops = {
     .dpy_mouse_set        = gd_mouse_set,
     .dpy_cursor_define    = gd_cursor_define,
 
-    .dpy_gl_ctx_create       = gd_egl_create_context,
-    .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
-    .dpy_gl_ctx_make_current = gd_egl_make_current,
     .dpy_gl_scanout_disable  = gd_egl_scanout_disable,
     .dpy_gl_scanout_texture  = gd_egl_scanout_texture,
     .dpy_gl_scanout_dmabuf   = gd_egl_scanout_dmabuf,
@@ -642,6 +641,12 @@ static const DisplayChangeListenerOps dcl_egl_ops = {
     .dpy_has_dmabuf          = gd_has_dmabuf,
 };
 
+static const DisplayGLCtxOps egl_ctx_ops = {
+    .compatible_dcl          = &dcl_egl_ops,
+    .dpy_gl_ctx_create       = gd_egl_create_context,
+    .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
+    .dpy_gl_ctx_make_current = gd_egl_make_current,
+};
 #endif
 
 #endif /* CONFIG_OPENGL */
@@ -698,7 +703,7 @@ static void gd_set_ui_info(VirtualConsole *vc, gint width, gint height)
     memset(&info, 0, sizeof(info));
     info.width = width;
     info.height = height;
-    dpy_set_ui_info(vc->gfx.dcl.con, &info);
+    dpy_set_ui_info(vc->gfx.dcl.con, &info, true);
 }
 
 #if defined(CONFIG_OPENGL)
@@ -2035,6 +2040,7 @@ static GSList *gd_vc_gfx_init(GtkDisplayState *s, VirtualConsole *vc,
             g_signal_connect(vc->gfx.drawing_area, "realize",
                              G_CALLBACK(gl_area_realize), vc);
             vc->gfx.dcl.ops = &dcl_gl_area_ops;
+            vc->gfx.dgc.ops = &gl_area_ctx_ops;
         } else {
 #ifdef CONFIG_X11
             vc->gfx.drawing_area = gtk_drawing_area_new();
@@ -2049,6 +2055,7 @@ static GSList *gd_vc_gfx_init(GtkDisplayState *s, VirtualConsole *vc,
             gtk_widget_set_double_buffered(vc->gfx.drawing_area, FALSE);
 #pragma GCC diagnostic pop
             vc->gfx.dcl.ops = &dcl_egl_ops;
+            vc->gfx.dgc.ops = &egl_ctx_ops;
             vc->gfx.has_dmabuf = qemu_egl_has_dmabuf();
 #else
             abort();
@@ -2083,6 +2090,9 @@ static GSList *gd_vc_gfx_init(GtkDisplayState *s, VirtualConsole *vc,
     vc->gfx.kbd = qkbd_state_init(con);
     vc->gfx.dcl.con = con;
 
+    if (display_opengl) {
+        qemu_console_set_display_gl_ctx(con, &vc->gfx.dgc);
+    }
     register_displaychangelistener(&vc->gfx.dcl);
 
     gd_connect_vc_gfx_signals(vc);

ui/meson.build

@@ -12,7 +12,11 @@ softmmu_ss.add(files(
   'kbd-state.c',
   'keymaps.c',
   'qemu-pixman.c',
+  'util.c',
 ))
+if dbus_display
+  softmmu_ss.add(files('dbus-module.c'))
+endif
 softmmu_ss.add([spice_headers, files('spice-module.c')])
 softmmu_ss.add(when: spice_protocol, if_true: files('vdagent.c'))
 
@@ -64,6 +68,30 @@ if config_host.has_key('CONFIG_OPENGL') and gbm.found()
   ui_modules += {'egl-headless' : egl_headless_ss}
 endif
 
+if dbus_display
+  dbus_ss = ss.source_set()
+  dbus_display1 = custom_target('dbus-display gdbus-codegen',
+                                output: ['dbus-display1.h', 'dbus-display1.c'],
+                                input: files('dbus-display1.xml'),
+                                command: [config_host['GDBUS_CODEGEN'],
+                                          '@INPUT@',
+                                          '--glib-min-required', '2.64',
+                                          '--output-directory', meson.current_build_dir(),
+                                          '--interface-prefix', 'org.qemu.',
+                                          '--c-namespace', 'QemuDBus',
+                                          '--generate-c-code', '@BASENAME@'])
+  dbus_ss.add(when: [gio, pixman, opengl, 'CONFIG_GIO'],
+              if_true: [files(
+                'dbus-chardev.c',
+                'dbus-clipboard.c',
+                'dbus-console.c',
+                'dbus-error.c',
+                'dbus-listener.c',
+                'dbus.c',
+              ), dbus_display1])
+  ui_modules += {'dbus' : dbus_ss}
+endif
+
 if gtk.found()
   softmmu_ss.add(when: 'CONFIG_WIN32', if_true: files('win32-kbd-hook.c'))
 

ui/sdl2-gl.c

@@ -58,7 +58,6 @@ static void sdl2_gl_render_surface(struct sdl2_console *scon)
 
     surface_gl_render_texture(scon->gls, scon->surface);
     SDL_GL_SwapWindow(scon->real_window);
-    graphic_hw_gl_flushed(scon->dcl.con);
 }
 
 void sdl2_gl_update(DisplayChangeListener *dcl,
@@ -133,10 +132,10 @@ void sdl2_gl_redraw(struct sdl2_console *scon)
     }
 }
 
-QEMUGLContext sdl2_gl_create_context(DisplayChangeListener *dcl,
+QEMUGLContext sdl2_gl_create_context(DisplayGLCtx *dgc,
                                      QEMUGLParams *params)
 {
-    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
+    struct sdl2_console *scon = container_of(dgc, struct sdl2_console, dgc);
     SDL_GLContext ctx;
 
     assert(scon->opengl);
@@ -168,17 +167,17 @@ QEMUGLContext sdl2_gl_create_context(DisplayChangeListener *dcl,
     return (QEMUGLContext)ctx;
 }
 
-void sdl2_gl_destroy_context(DisplayChangeListener *dcl, QEMUGLContext ctx)
+void sdl2_gl_destroy_context(DisplayGLCtx *dgc, QEMUGLContext ctx)
 {
     SDL_GLContext sdlctx = (SDL_GLContext)ctx;
 
     SDL_GL_DeleteContext(sdlctx);
 }
 
-int sdl2_gl_make_context_current(DisplayChangeListener *dcl,
+int sdl2_gl_make_context_current(DisplayGLCtx *dgc,
                                  QEMUGLContext ctx)
 {
-    struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
+    struct sdl2_console *scon = container_of(dgc, struct sdl2_console, dgc);
     SDL_GLContext sdlctx = (SDL_GLContext)ctx;
 
     assert(scon->opengl);
@@ -241,5 +240,4 @@ void sdl2_gl_scanout_flush(DisplayChangeListener *dcl,
     egl_fb_blit(&scon->win_fb, &scon->guest_fb, !scon->y0_top);
 
     SDL_GL_SwapWindow(scon->real_window);
-    graphic_hw_gl_flushed(dcl->con);
 }

ui/sdl2.c

@@ -561,7 +561,7 @@ static void handle_windowevent(SDL_Event *ev)
             memset(&info, 0, sizeof(info));
             info.width = ev->window.data1;
             info.height = ev->window.data2;
-            dpy_set_ui_info(scon->dcl.con, &info);
+            dpy_set_ui_info(scon->dcl.con, &info, true);
         }
         sdl2_redraw(scon);
         break;
@@ -778,13 +778,17 @@ static const DisplayChangeListenerOps dcl_gl_ops = {
     .dpy_mouse_set           = sdl_mouse_warp,
     .dpy_cursor_define       = sdl_mouse_define,
 
-    .dpy_gl_ctx_create       = sdl2_gl_create_context,
-    .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
-    .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
     .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
     .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
     .dpy_gl_update           = sdl2_gl_scanout_flush,
 };
+
+static const DisplayGLCtxOps gl_ctx_ops = {
+    .compatible_dcl          = &dcl_gl_ops,
+    .dpy_gl_ctx_create       = sdl2_gl_create_context,
+    .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
+    .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
+};
 #endif
 
 static void sdl2_display_early_init(DisplayOptions *o)
@@ -860,12 +864,16 @@ static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
 #ifdef CONFIG_OPENGL
         sdl2_console[i].opengl = display_opengl;
         sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
+        sdl2_console[i].dgc.ops = display_opengl ? &gl_ctx_ops : NULL;
 #else
         sdl2_console[i].opengl = 0;
         sdl2_console[i].dcl.ops = &dcl_2d_ops;
 #endif
         sdl2_console[i].dcl.con = con;
         sdl2_console[i].kbd = qkbd_state_init(con);
+        if (display_opengl) {
+            qemu_console_set_display_gl_ctx(con, &sdl2_console[i].dgc);
+        }
         register_displaychangelistener(&sdl2_console[i].dcl);
 
 #if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)

ui/spice-core.c

@@ -884,56 +884,6 @@ bool qemu_spice_have_display_interface(QemuConsole *con)
     return false;
 }
 
-/*
- * Recursively (in reverse order) appends addresses of PCI devices as it moves
- * up in the PCI hierarchy.
- *
- * @returns true on success, false when the buffer wasn't large enough
- */
-static bool append_pci_address(char *buf, size_t buf_size, const PCIDevice *pci)
-{
-    PCIBus *bus = pci_get_bus(pci);
-    /*
-     * equivalent to if (!pci_bus_is_root(bus)), but the function is not built
-     * with PCI_CONFIG=n, avoid using an #ifdef by checking directly
-     */
-    if (bus->parent_dev != NULL) {
-        append_pci_address(buf, buf_size, bus->parent_dev);
-    }
-
-    size_t len = strlen(buf);
-    ssize_t written = snprintf(buf + len, buf_size - len, "/%02x.%x",
-        PCI_SLOT(pci->devfn), PCI_FUNC(pci->devfn));
-
-    return written > 0 && written < buf_size - len;
-}
-
-bool qemu_spice_fill_device_address(QemuConsole *con,
-                                    char *device_address,
-                                    size_t size)
-{
-    DeviceState *dev = DEVICE(object_property_get_link(OBJECT(con),
-                                                       "device",
-                                                       &error_abort));
-    PCIDevice *pci = (PCIDevice *) object_dynamic_cast(OBJECT(dev),
-                                                       TYPE_PCI_DEVICE);
-
-    if (pci == NULL) {
-        warn_report("Setting device address of a display device to SPICE: "
-                    "Not a PCI device.");
-        return false;
-    }
-
-    strncpy(device_address, "pci/0000", size);
-    if (!append_pci_address(device_address, size, pci)) {
-        warn_report("Setting device address of a display device to SPICE: "
-            "Too many PCI devices in the chain.");
-        return false;
-    }
-
-    return true;
-}
-
 int qemu_spice_add_display_interface(QXLInstance *qxlin, QemuConsole *con)
 {
     if (g_slist_find(spice_consoles, con)) {

ui/spice-display.c

@@ -692,7 +692,7 @@ static int interface_client_monitors_config(QXLInstance *sin,
     }
 
     trace_qemu_spice_ui_info(ssd->qxl.id, info.width, info.height);
-    dpy_set_ui_info(ssd->dcl.con, &info);
+    dpy_set_ui_info(ssd->dcl.con, &info, false);
     return 1;
 }
 
@@ -830,7 +830,6 @@ static void qemu_spice_gl_unblock_bh(void *opaque)
     SimpleSpiceDisplay *ssd = opaque;
 
     qemu_spice_gl_block(ssd, false);
-    graphic_hw_gl_flushed(ssd->dcl.con);
 }
 
 static void qemu_spice_gl_block_timer(void *opaque)
@@ -909,12 +908,12 @@ static void spice_gl_switch(DisplayChangeListener *dcl,
     }
 }
 
-static QEMUGLContext qemu_spice_gl_create_context(DisplayChangeListener *dcl,
+static QEMUGLContext qemu_spice_gl_create_context(DisplayGLCtx *dgc,
                                                   QEMUGLParams *params)
 {
     eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
                    qemu_egl_rn_ctx);
-    return qemu_egl_create_context(dcl, params);
+    return qemu_egl_create_context(dgc, params);
 }
 
 static void qemu_spice_gl_scanout_disable(DisplayChangeListener *dcl)
@@ -1106,10 +1105,6 @@ static const DisplayChangeListenerOps display_listener_gl_ops = {
     .dpy_mouse_set           = display_mouse_set,
     .dpy_cursor_define       = display_mouse_define,
 
-    .dpy_gl_ctx_create       = qemu_spice_gl_create_context,
-    .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
-    .dpy_gl_ctx_make_current = qemu_egl_make_context_current,
-
     .dpy_gl_scanout_disable  = qemu_spice_gl_scanout_disable,
     .dpy_gl_scanout_texture  = qemu_spice_gl_scanout_texture,
     .dpy_gl_scanout_dmabuf   = qemu_spice_gl_scanout_dmabuf,
@@ -1119,6 +1114,13 @@ static const DisplayChangeListenerOps display_listener_gl_ops = {
     .dpy_gl_update           = qemu_spice_gl_update,
 };
 
+static const DisplayGLCtxOps gl_ctx_ops = {
+    .compatible_dcl          = &display_listener_gl_ops,
+    .dpy_gl_ctx_create       = qemu_spice_gl_create_context,
+    .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
+    .dpy_gl_ctx_make_current = qemu_egl_make_context_current,
+};
+
 #endif /* HAVE_SPICE_GL */
 
 static void qemu_spice_display_init_one(QemuConsole *con)
@@ -1131,6 +1133,7 @@ static void qemu_spice_display_init_one(QemuConsole *con)
 #ifdef HAVE_SPICE_GL
     if (spice_opengl) {
         ssd->dcl.ops = &display_listener_gl_ops;
+        ssd->dgc.ops = &gl_ctx_ops;
         ssd->gl_unblock_bh = qemu_bh_new(qemu_spice_gl_unblock_bh, ssd);
         ssd->gl_unblock_timer = timer_new_ms(QEMU_CLOCK_REALTIME,
                                              qemu_spice_gl_block_timer, ssd);
@@ -1145,17 +1148,23 @@ static void qemu_spice_display_init_one(QemuConsole *con)
     qemu_spice_add_display_interface(&ssd->qxl, con);
 
 #if SPICE_SERVER_VERSION >= 0x000e02 /* release 0.14.2 */
+    Error *err = NULL;
     char device_address[256] = "";
-    if (qemu_spice_fill_device_address(con, device_address, 256)) {
+    if (qemu_console_fill_device_address(con, device_address, 256, &err)) {
         spice_qxl_set_device_info(&ssd->qxl,
                                   device_address,
                                   qemu_console_get_head(con),
                                   1);
+    } else {
+        error_report_err(err);
     }
 #endif
 
     qemu_spice_create_host_memslot(ssd);
 
+    if (spice_opengl) {
+        qemu_console_set_display_gl_ctx(con, &ssd->dgc);
+    }
     register_displaychangelistener(&ssd->dcl);
 }
 

ui/trace-events

@@ -135,3 +135,18 @@ vdagent_recv_msg(const char *name, uint32_t size) "msg %s, size %d"
 vdagent_peer_cap(const char *name) "cap %s"
 vdagent_cb_grab_selection(const char *name) "selection %s"
 vdagent_cb_grab_type(const char *name) "type %s"
+vdagent_cb_serial_discard(uint32_t current, uint32_t received) "current=%u, received=%u"
+
+# dbus.c
+dbus_registered_listener(const char *bus_name) "peer %s"
+dbus_listener_vanished(const char *bus_name) "peer %s"
+dbus_kbd_press(unsigned int keycode) "keycode %u"
+dbus_kbd_release(unsigned int keycode) "keycode %u"
+dbus_mouse_press(unsigned int button) "button %u"
+dbus_mouse_release(unsigned int button) "button %u"
+dbus_mouse_set_pos(unsigned int x, unsigned int y) "x=%u, y=%u"
+dbus_mouse_rel_motion(int dx, int dy) "dx=%d, dy=%d"
+dbus_update(int x, int y, int w, int h) "x=%d, y=%d, w=%d, h=%d"
+dbus_clipboard_grab_failed(void) ""
+dbus_clipboard_register(const char *bus_name) "peer %s"
+dbus_clipboard_unregister(const char *bus_name) "peer %s"

ui/util.c

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2021 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 or
+ * (at your option) version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+
+#include "hw/pci/pci.h"
+#include "hw/pci/pci_bus.h"
+#include "qapi/error.h"
+#include "ui/console.h"
+
+/*
+ * Recursively (in reverse order) appends addresses of PCI devices as it moves
+ * up in the PCI hierarchy.
+ *
+ * @returns true on success, false when the buffer wasn't large enough
+ */
+static bool append_pci_address(char *buf, size_t buf_size, const PCIDevice *pci)
+{
+    PCIBus *bus = pci_get_bus(pci);
+    /*
+     * equivalent to if (!pci_bus_is_root(bus)), but the function is not built
+     * with PCI_CONFIG=n, avoid using an #ifdef by checking directly
+     */
+    if (bus->parent_dev != NULL) {
+        append_pci_address(buf, buf_size, bus->parent_dev);
+    }
+
+    size_t len = strlen(buf);
+    ssize_t written = snprintf(buf + len, buf_size - len, "/%02x.%x",
+        PCI_SLOT(pci->devfn), PCI_FUNC(pci->devfn));
+
+    return written > 0 && written < buf_size - len;
+}
+
+bool qemu_console_fill_device_address(QemuConsole *con,
+                                      char *device_address,
+                                      size_t size,
+                                      Error **errp)
+{
+    ERRP_GUARD();
+    DeviceState *dev = DEVICE(object_property_get_link(OBJECT(con),
+                                                       "device",
+                                                       &error_abort));
+    PCIDevice *pci = (PCIDevice *) object_dynamic_cast(OBJECT(dev),
+                                                       TYPE_PCI_DEVICE);
+
+    if (pci == NULL) {
+        error_setg(errp, "Setting device address of a display device: "
+                   "Not a PCI device.");
+        return false;
+    }
+
+    strncpy(device_address, "pci/0000", size);
+    if (!append_pci_address(device_address, size, pci)) {
+        error_setg(errp, "Setting device address of a display device: "
+                   "Too many PCI devices in the chain.");
+        return false;
+    }
+
+    return true;
+}

ui/vdagent.c

@@ -17,6 +17,14 @@
 
 #include "spice/vd_agent.h"
 
+#define CHECK_SPICE_PROTOCOL_VERSION(major, minor, micro) \
+    (CONFIG_SPICE_PROTOCOL_MAJOR > (major) ||             \
+     (CONFIG_SPICE_PROTOCOL_MAJOR == (major) &&           \
+      CONFIG_SPICE_PROTOCOL_MINOR > (minor)) ||           \
+     (CONFIG_SPICE_PROTOCOL_MAJOR == (major) &&           \
+      CONFIG_SPICE_PROTOCOL_MINOR == (minor) &&           \
+      CONFIG_SPICE_PROTOCOL_MICRO >= (micro)))
+
 #define VDAGENT_BUFFER_LIMIT (1 * MiB)
 #define VDAGENT_MOUSE_DEFAULT true
 #define VDAGENT_CLIPBOARD_DEFAULT false
@@ -51,6 +59,7 @@ struct VDAgentChardev {
 
     /* clipboard */
     QemuClipboardPeer cbpeer;
+    uint32_t last_serial[QEMU_CLIPBOARD_SELECTION__COUNT];
     uint32_t cbpending[QEMU_CLIPBOARD_SELECTION__COUNT];
 };
 typedef struct VDAgentChardev VDAgentChardev;
@@ -79,8 +88,10 @@ static const char *cap_name[] = {
     [VD_AGENT_CAP_MONITORS_CONFIG_POSITION]       = "monitors-config-position",
     [VD_AGENT_CAP_FILE_XFER_DISABLED]             = "file-xfer-disabled",
     [VD_AGENT_CAP_FILE_XFER_DETAILED_ERRORS]      = "file-xfer-detailed-errors",
-#if 0
+#if CHECK_SPICE_PROTOCOL_VERSION(0, 14, 0)
     [VD_AGENT_CAP_GRAPHICS_DEVICE_INFO]           = "graphics-device-info",
+#endif
+#if CHECK_SPICE_PROTOCOL_VERSION(0, 14, 1)
     [VD_AGENT_CAP_CLIPBOARD_NO_RELEASE_ON_REGRAB] = "clipboard-no-release-on-regrab",
     [VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL]          = "clipboard-grab-serial",
 #endif
@@ -102,7 +113,7 @@ static const char *msg_name[] = {
     [VD_AGENT_CLIENT_DISCONNECTED]   = "client-disconnected",
     [VD_AGENT_MAX_CLIPBOARD]         = "max-clipboard",
     [VD_AGENT_AUDIO_VOLUME_SYNC]     = "audio-volume-sync",
-#if 0
+#if CHECK_SPICE_PROTOCOL_VERSION(0, 14, 0)
     [VD_AGENT_GRAPHICS_DEVICE_INFO]  = "graphics-device-info",
 #endif
 };
@@ -120,7 +131,7 @@ static const char *type_name[] = {
     [VD_AGENT_CLIPBOARD_IMAGE_BMP]  = "bmp",
     [VD_AGENT_CLIPBOARD_IMAGE_TIFF] = "tiff",
     [VD_AGENT_CLIPBOARD_IMAGE_JPG]  = "jpg",
-#if 0
+#if CHECK_SPICE_PROTOCOL_VERSION(0, 14, 3)
     [VD_AGENT_CLIPBOARD_FILE_LIST]  = "files",
 #endif
 };
@@ -193,6 +204,9 @@ static void vdagent_send_caps(VDAgentChardev *vd)
     if (vd->clipboard) {
         caps->caps[0] |= (1 << VD_AGENT_CAP_CLIPBOARD_BY_DEMAND);
         caps->caps[0] |= (1 << VD_AGENT_CAP_CLIPBOARD_SELECTION);
+#if CHECK_SPICE_PROTOCOL_VERSION(0, 14, 1)
+        caps->caps[0] |= (1 << VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL);
+#endif
     }
 
     vdagent_send_msg(vd, msg);
@@ -323,7 +337,8 @@ static void vdagent_send_clipboard_grab(VDAgentChardev *vd,
 {
     g_autofree VDAgentMessage *msg =
         g_malloc0(sizeof(VDAgentMessage) +
-                  sizeof(uint32_t) * (QEMU_CLIPBOARD_TYPE__COUNT + 1));
+                  sizeof(uint32_t) * (QEMU_CLIPBOARD_TYPE__COUNT + 1) +
+                  sizeof(uint32_t));
     uint8_t *s = msg->data;
     uint32_t *data = (uint32_t *)msg->data;
     uint32_t q, type;
@@ -336,6 +351,19 @@ static void vdagent_send_clipboard_grab(VDAgentChardev *vd,
         return;
     }
 
+#if CHECK_SPICE_PROTOCOL_VERSION(0, 14, 1)
+    if (vd->caps & (1 << VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL)) {
+        if (!info->has_serial) {
+            /* client should win */
+            info->serial = vd->last_serial[info->selection]++;
+            info->has_serial = true;
+        }
+        *data = info->serial;
+        data++;
+        msg->size += sizeof(uint32_t);
+    }
+#endif
+
     for (q = 0; q < QEMU_CLIPBOARD_TYPE__COUNT; q++) {
         type = type_qemu_to_vdagent(q);
         if (type != VD_AGENT_CLIPBOARD_NONE && info->types[q].available) {
@@ -407,10 +435,9 @@ static void vdagent_send_empty_clipboard_data(VDAgentChardev *vd,
     vdagent_send_clipboard_data(vd, info, type);
 }
 
-static void vdagent_clipboard_notify(Notifier *notifier, void *data)
+static void vdagent_clipboard_update_info(VDAgentChardev *vd,
+                                          QemuClipboardInfo *info)
 {
-    VDAgentChardev *vd = container_of(notifier, VDAgentChardev, cbpeer.update);
-    QemuClipboardInfo *info = data;
     QemuClipboardSelection s = info->selection;
     QemuClipboardType type;
     bool self_update = info->owner == &vd->cbpeer;
@@ -439,6 +466,31 @@ static void vdagent_clipboard_notify(Notifier *notifier, void *data)
     }
 }
 
+static void vdagent_clipboard_reset_serial(VDAgentChardev *vd)
+{
+    Chardev *chr = CHARDEV(vd);
+
+    /* reopen the agent connection to reset the serial state */
+    qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
+    qemu_chr_be_event(chr, CHR_EVENT_OPENED);
+}
+
+static void vdagent_clipboard_notify(Notifier *notifier, void *data)
+{
+    VDAgentChardev *vd =
+        container_of(notifier, VDAgentChardev, cbpeer.notifier);
+    QemuClipboardNotify *notify = data;
+
+    switch (notify->type) {
+    case QEMU_CLIPBOARD_UPDATE_INFO:
+        vdagent_clipboard_update_info(vd, notify->info);
+        return;
+    case QEMU_CLIPBOARD_RESET_SERIAL:
+        vdagent_clipboard_reset_serial(vd);
+        return;
+    }
+}
+
 static void vdagent_clipboard_request(QemuClipboardInfo *info,
                                       QemuClipboardType qtype)
 {
@@ -472,6 +524,24 @@ static void vdagent_clipboard_recv_grab(VDAgentChardev *vd, uint8_t s, uint32_t
 
     trace_vdagent_cb_grab_selection(GET_NAME(sel_name, s));
     info = qemu_clipboard_info_new(&vd->cbpeer, s);
+#if CHECK_SPICE_PROTOCOL_VERSION(0, 14, 1)
+    if (vd->caps & (1 << VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL)) {
+        if (size < sizeof(uint32_t)) {
+            /* this shouldn't happen! */
+            return;
+        }
+
+        info->has_serial = true;
+        info->serial = *(uint32_t *)data;
+        if (info->serial < vd->last_serial[s]) {
+            /* discard lower-ordering guest grab */
+            return;
+        }
+        vd->last_serial[s] = info->serial;
+        data += sizeof(uint32_t);
+        size -= sizeof(uint32_t);
+    }
+#endif
     if (size > sizeof(uint32_t) * 10) {
         /*
          * spice has 6 types as of 2021. Limiting to 10 entries
@@ -648,9 +718,10 @@ static void vdagent_chr_recv_caps(VDAgentChardev *vd, VDAgentMessage *msg)
     if (have_mouse(vd) && vd->mouse_hs) {
         qemu_input_handler_activate(vd->mouse_hs);
     }
-    if (have_clipboard(vd) && vd->cbpeer.update.notify == NULL) {
+    if (have_clipboard(vd) && vd->cbpeer.notifier.notify == NULL) {
+        memset(vd->last_serial, 0, sizeof(vd->last_serial));
         vd->cbpeer.name = "vdagent";
-        vd->cbpeer.update.notify = vdagent_clipboard_notify;
+        vd->cbpeer.notifier.notify = vdagent_clipboard_notify;
         vd->cbpeer.request = vdagent_clipboard_request;
         qemu_clipboard_peer_register(&vd->cbpeer);
     }
@@ -789,7 +860,7 @@ static void vdagent_disconnect(VDAgentChardev *vd)
     if (vd->mouse_hs) {
         qemu_input_handler_deactivate(vd->mouse_hs);
     }
-    if (vd->cbpeer.update.notify) {
+    if (vd->cbpeer.notifier.notify) {
         qemu_clipboard_peer_unregister(&vd->cbpeer);
         memset(&vd->cbpeer, 0, sizeof(vd->cbpeer));
     }
@@ -797,11 +868,8 @@ static void vdagent_disconnect(VDAgentChardev *vd)
 
 static void vdagent_chr_set_fe_open(struct Chardev *chr, int fe_open)
 {
-    VDAgentChardev *vd = QEMU_VDAGENT_CHARDEV(chr);
-
     if (!fe_open) {
         trace_vdagent_close();
-        vdagent_disconnect(vd);
         return;
     }
 

ui/vnc-clipboard.c

@@ -189,10 +189,8 @@ static void vnc_clipboard_provide(VncState *vs,
     vnc_flush(vs);
 }
 
-static void vnc_clipboard_notify(Notifier *notifier, void *data)
+static void vnc_clipboard_update_info(VncState *vs, QemuClipboardInfo *info)
 {
-    VncState *vs = container_of(notifier, VncState, cbpeer.update);
-    QemuClipboardInfo *info = data;
     QemuClipboardType type;
     bool self_update = info->owner == &vs->cbpeer;
     uint32_t flags = 0;
@@ -223,6 +221,21 @@ static void vnc_clipboard_notify(Notifier *notifier, void *data)
     }
 }
 
+static void vnc_clipboard_notify(Notifier *notifier, void *data)
+{
+    VncState *vs = container_of(notifier, VncState, cbpeer.notifier);
+    QemuClipboardNotify *notify = data;
+
+    switch (notify->type) {
+    case QEMU_CLIPBOARD_UPDATE_INFO:
+        vnc_clipboard_update_info(vs, notify->info);
+        return;
+    case QEMU_CLIPBOARD_RESET_SERIAL:
+        /* ignore */
+        return;
+    }
+}
+
 static void vnc_clipboard_request(QemuClipboardInfo *info,
                                   QemuClipboardType type)
 {
@@ -316,9 +329,9 @@ void vnc_server_cut_text_caps(VncState *vs)
     caps[1] = 0;
     vnc_clipboard_send(vs, 2, caps);
 
-    if (!vs->cbpeer.update.notify) {
+    if (!vs->cbpeer.notifier.notify) {
         vs->cbpeer.name = "vnc";
-        vs->cbpeer.update.notify = vnc_clipboard_notify;
+        vs->cbpeer.notifier.notify = vnc_clipboard_notify;
         vs->cbpeer.request = vnc_clipboard_request;
         qemu_clipboard_peer_register(&vs->cbpeer);
     }

ui/vnc.c

@@ -1354,7 +1354,7 @@ void vnc_disconnect_finish(VncState *vs)
         /* last client gone */
         vnc_update_server_surface(vs->vd);
     }
-    if (vs->cbpeer.update.notify) {
+    if (vs->cbpeer.notifier.notify) {
         qemu_clipboard_peer_unregister(&vs->cbpeer);
     }
 
@@ -2596,7 +2596,7 @@ static int protocol_client_msg(VncState *vs, uint8_t *data, size_t len)
             memset(&info, 0, sizeof(info));
             info.width = w;
             info.height = h;
-            dpy_set_ui_info(vs->vd->dcl.con, &info);
+            dpy_set_ui_info(vs->vd->dcl.con, &info, false);
             vnc_desktop_resize_ext(vs, 4 /* Request forwarded */);
         } else {
             vnc_desktop_resize_ext(vs, 3 /* Invalid screen layout */);