31 files changed, 201 insertions, 150 deletions

diff --git a/block/block-backend.c b/block/block-backend.c
index fa120630be..14a1b7ac6a 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -980,8 +980,7 @@ void blk_dev_change_media_cb(BlockBackend *blk, bool load, Error **errp)
 
         if (tray_was_open != tray_is_open) {
             char *id = blk_get_attached_dev_id(blk);
-            qapi_event_send_device_tray_moved(blk_name(blk), id, tray_is_open,
-                                              &error_abort);
+            qapi_event_send_device_tray_moved(blk_name(blk), id, tray_is_open);
             g_free(id);
         }
     }
@@ -1665,8 +1664,7 @@ static void send_qmp_error_event(BlockBackend *blk,
     qapi_event_send_block_io_error(blk_name(blk), !!bs,
                                    bs ? bdrv_get_node_name(bs) : NULL, optype,
                                    action, blk_iostatus_is_enabled(blk),
-                                   error == ENOSPC, strerror(error),
-                                   &error_abort);
+                                   error == ENOSPC, strerror(error));
 }
 
 /* This is done by device models because, while the block layer knows
@@ -1782,7 +1780,7 @@ void blk_eject(BlockBackend *blk, bool eject_flag)
      * the frontend experienced a tray event. */
     id = blk_get_attached_dev_id(blk);
     qapi_event_send_device_tray_moved(blk_name(blk), id,
-                                      eject_flag, &error_abort);
+                                      eject_flag);
     g_free(id);
 }
 
diff --git a/block/qcow2.c b/block/qcow2.c
index ec9e6238a0..c13153735a 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -4659,7 +4659,7 @@ void qcow2_signal_corruption(BlockDriverState *bs, bool fatal, int64_t offset,
                                           *node_name != '\0', node_name,
                                           message, offset >= 0, offset,
                                           size >= 0, size,
-                                          fatal, &error_abort);
+                                          fatal);
     g_free(message);
 
     if (fatal) {
diff --git a/block/quorum.c b/block/quorum.c
index 9152da8c58..eb526cc0f1 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -199,7 +199,7 @@ static void quorum_report_bad(QuorumOpType type, uint64_t offset,
     }
 
     qapi_event_send_quorum_report_bad(type, !!msg, msg, node_name, start_sector,
-                                      end_sector - start_sector, &error_abort);
+                                      end_sector - start_sector);
 }
 
 static void quorum_report_failure(QuorumAIOCB *acb)
@@ -210,7 +210,7 @@ static void quorum_report_failure(QuorumAIOCB *acb)
                                       BDRV_SECTOR_SIZE);
 
     qapi_event_send_quorum_failure(reference, start_sector,
-                                   end_sector - start_sector, &error_abort);
+                                   end_sector - start_sector);
 }
 
 static int quorum_vote_error(QuorumAIOCB *acb);
diff --git a/block/write-threshold.c b/block/write-threshold.c
index 1d48fc2077..85b78dc2a9 100644
--- a/block/write-threshold.c
+++ b/block/write-threshold.c
@@ -63,8 +63,7 @@ static int coroutine_fn before_write_notify(NotifierWithReturn *notifier,
         qapi_event_send_block_write_threshold(
             bs->node_name,
             amount,
-            bs->write_threshold_offset,
-            &error_abort);
+            bs->write_threshold_offset);
 
         /* autodisable to avoid flooding the monitor */
         write_threshold_disable(bs);
diff --git a/blockjob.c b/blockjob.c
index be5903aa96..bf7ef48f98 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -315,8 +315,7 @@ static void block_job_event_cancelled(Notifier *n, void *opaque)
                                         job->job.id,
                                         job->job.progress_total,
                                         job->job.progress_current,
-                                        job->speed,
-                                        &error_abort);
+                                        job->speed);
 }
 
 static void block_job_event_completed(Notifier *n, void *opaque)
@@ -338,8 +337,7 @@ static void block_job_event_completed(Notifier *n, void *opaque)
                                         job->job.progress_current,
                                         job->speed,
                                         !!msg,
-                                        msg,
-                                        &error_abort);
+                                        msg);
 }
 
 static void block_job_event_pending(Notifier *n, void *opaque)
@@ -351,8 +349,7 @@ static void block_job_event_pending(Notifier *n, void *opaque)
     }
 
     qapi_event_send_block_job_pending(job_type(&job->job),
-                                      job->job.id,
-                                      &error_abort);
+                                      job->job.id);
 }
 
 static void block_job_event_ready(Notifier *n, void *opaque)
@@ -367,7 +364,7 @@ static void block_job_event_ready(Notifier *n, void *opaque)
                                     job->job.id,
                                     job->job.progress_total,
                                     job->job.progress_current,
-                                    job->speed, &error_abort);
+                                    job->speed);
 }
 
 
@@ -494,7 +491,7 @@ BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err,
         qapi_event_send_block_job_error(job->job.id,
                                         is_read ? IO_OPERATION_TYPE_READ :
                                         IO_OPERATION_TYPE_WRITE,
-                                        action, &error_abort);
+                                        action);
     }
     if (action == BLOCK_ERROR_ACTION_STOP) {
         job_pause(&job->job);
diff --git a/cpus.c b/cpus.c
index 8ee6e5db93..412aebc8b0 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1053,7 +1053,7 @@ static int do_vm_stop(RunState state, bool send_stop)
         runstate_set(state);
         vm_state_notify(0, state);
         if (send_stop) {
-            qapi_event_send_stop(&error_abort);
+            qapi_event_send_stop();
         }
     }
 
@@ -2107,13 +2107,13 @@ int vm_prepare_start(void)
      * the STOP event.
      */
     if (runstate_is_running()) {
-        qapi_event_send_stop(&error_abort);
-        qapi_event_send_resume(&error_abort);
+        qapi_event_send_stop();
+        qapi_event_send_resume();
         return -1;
     }
 
     /* We are sending this now, but the CPUs will be resumed shortly later */
-    qapi_event_send_resume(&error_abort);
+    qapi_event_send_resume();
 
     replay_enable_events();
     cpu_enable_ticks();
diff --git a/docs/devel/qapi-code-gen.txt b/docs/devel/qapi-code-gen.txt
index c2e11465f0..53eaf01f34 100644
--- a/docs/devel/qapi-code-gen.txt
+++ b/docs/devel/qapi-code-gen.txt
@@ -1035,7 +1035,7 @@ Example:
     #ifndef EXAMPLE_QAPI_TYPES_H
     #define EXAMPLE_QAPI_TYPES_H
 
-[Built-in types omitted...]
+    #include "qapi/qapi-builtin-types.h"
 
     typedef struct UserDefOne UserDefOne;
 
@@ -1062,7 +1062,7 @@ Example:
         UserDefOneList *arg1;
     };
 
-    #endif
+    #endif /* EXAMPLE_QAPI_TYPES_H */
     $ cat qapi-generated/example-qapi-types.c
 [Uninteresting stuff omitted...]
 
@@ -1092,6 +1092,8 @@ Example:
         visit_free(v);
     }
 
+[Uninteresting stuff omitted...]
+
 === Code generated for visiting QAPI types ===
 
 These are the visitor functions used to walk through and convert
@@ -1118,7 +1120,9 @@ Example:
     #ifndef EXAMPLE_QAPI_VISIT_H
     #define EXAMPLE_QAPI_VISIT_H
 
-[Visitors for built-in types omitted...]
+    #include "qapi/qapi-builtin-visit.h"
+    #include "example-qapi-types.h"
+
 
     void visit_type_UserDefOne_members(Visitor *v, UserDefOne *obj, Error **errp);
     void visit_type_UserDefOne(Visitor *v, const char *name, UserDefOne **obj, Error **errp);
@@ -1126,7 +1130,7 @@ Example:
 
     void visit_type_q_obj_my_command_arg_members(Visitor *v, q_obj_my_command_arg *obj, Error **errp);
 
-    #endif
+    #endif /* EXAMPLE_QAPI_VISIT_H */
     $ cat qapi-generated/example-qapi-visit.c
 [Uninteresting stuff omitted...]
 
@@ -1219,6 +1223,8 @@ Example:
         error_propagate(errp, err);
     }
 
+[Uninteresting stuff omitted...]
+
 === Code generated for commands ===
 
 These are the marshaling/dispatch functions for the commands defined
@@ -1238,18 +1244,17 @@ Example:
     $ cat qapi-generated/example-qapi-commands.h
 [Uninteresting stuff omitted...]
 
-    #ifndef EXAMPLE_QMP_COMMANDS_H
-    #define EXAMPLE_QMP_COMMANDS_H
+    #ifndef EXAMPLE_QAPI_COMMANDS_H
+    #define EXAMPLE_QAPI_COMMANDS_H
 
     #include "example-qapi-types.h"
-    #include "qapi/qmp/qdict.h"
     #include "qapi/qmp/dispatch.h"
 
-    void example_qmp_init_marshal(QmpCommandList *cmds);
     UserDefOne *qmp_my_command(UserDefOneList *arg1, Error **errp);
     void qmp_marshal_my_command(QDict *args, QObject **ret, Error **errp);
+    void example_qmp_init_marshal(QmpCommandList *cmds);
 
-    #endif
+    #endif /* EXAMPLE_QAPI_COMMANDS_H */
     $ cat qapi-generated/example-qapi-commands.c
 [Uninteresting stuff omitted...]
 
@@ -1316,6 +1321,8 @@ Example:
                              qmp_marshal_my_command, QCO_NO_OPTIONS);
     }
 
+[Uninteresting stuff omitted...]
+
 === Code generated for events ===
 
 This is the code related to events defined in the schema, providing
@@ -1333,14 +1340,14 @@ Example:
     $ cat qapi-generated/example-qapi-events.h
 [Uninteresting stuff omitted...]
 
-    #ifndef EXAMPLE_QAPI_EVENT_H
-    #define EXAMPLE_QAPI_EVENT_H
+    #ifndef EXAMPLE_QAPI_EVENTS_H
+    #define EXAMPLE_QAPI_EVENTS_H
 
-    #include "qapi/qmp/qdict.h"
+    #include "qapi/util.h"
     #include "example-qapi-types.h"
 
 
-    void qapi_event_send_my_event(Error **errp);
+    void qapi_event_send_my_event(void);
 
     typedef enum example_QAPIEvent {
         EXAMPLE_QAPI_EVENT_MY_EVENT = 0,
@@ -1348,18 +1355,17 @@ Example:
     } example_QAPIEvent;
 
     #define example_QAPIEvent_str(val) \
-        qapi_enum_lookup(example_QAPIEvent_lookup, (val))
+        qapi_enum_lookup(&example_QAPIEvent_lookup, (val))
 
-    extern const char *const example_QAPIEvent_lookup[];
+    extern const QEnumLookup example_QAPIEvent_lookup;
 
-    #endif
+    #endif /* EXAMPLE_QAPI_EVENTS_H */
     $ cat qapi-generated/example-qapi-events.c
 [Uninteresting stuff omitted...]
 
-    void qapi_event_send_my_event(Error **errp)
+    void qapi_event_send_my_event(void)
     {
         QDict *qmp;
-        Error *err = NULL;
         QMPEventFuncEmit emit;
 
         emit = qmp_event_get_func_emit();
@@ -1369,9 +1375,8 @@ Example:
 
         qmp = qmp_event_build_dict("MY_EVENT");
 
-        emit(EXAMPLE_QAPI_EVENT_MY_EVENT, qmp, &err);
+        emit(EXAMPLE_QAPI_EVENT_MY_EVENT, qmp);
 
-        error_propagate(errp, err);
         qobject_unref(qmp);
     }
 
@@ -1382,6 +1387,8 @@ Example:
         .size = EXAMPLE_QAPI_EVENT__MAX
     };
 
+[Uninteresting stuff omitted...]
+
 === Code generated for introspection ===
 
 The following files are created:
@@ -1396,30 +1403,93 @@ Example:
     $ cat qapi-generated/example-qapi-introspect.h
 [Uninteresting stuff omitted...]
 
-    #ifndef EXAMPLE_QMP_INTROSPECT_H
-    #define EXAMPLE_QMP_INTROSPECT_H
+    #ifndef EXAMPLE_QAPI_INTROSPECT_H
+    #define EXAMPLE_QAPI_INTROSPECT_H
 
-    extern const QLitObject qmp_schema_qlit;
+    #include "qapi/qmp/qlit.h"
 
-    #endif
+    extern const QLitObject example_qmp_schema_qlit;
+
+    #endif /* EXAMPLE_QAPI_INTROSPECT_H */
     $ cat qapi-generated/example-qapi-introspect.c
 [Uninteresting stuff omitted...]
 
     const QLitObject example_qmp_schema_qlit = QLIT_QLIST(((QLitObject[]) {
         QLIT_QDICT(((QLitDictEntry[]) {
-            { "arg-type", QLIT_QSTR("0") },
-            { "meta-type", QLIT_QSTR("event") },
-            { "name", QLIT_QSTR("Event") },
-            { }
+            { "arg-type", QLIT_QSTR("0"), },
+            { "meta-type", QLIT_QSTR("command"), },
+            { "name", QLIT_QSTR("my-command"), },
+            { "ret-type", QLIT_QSTR("1"), },
+            {}
         })),
         QLIT_QDICT(((QLitDictEntry[]) {
+            { "arg-type", QLIT_QSTR("2"), },
+            { "meta-type", QLIT_QSTR("event"), },
+            { "name", QLIT_QSTR("MY_EVENT"), },
+            {}
+        })),
+        /* "0" = q_obj_my-command-arg */
+        QLIT_QDICT(((QLitDictEntry[]) {
+            { "members", QLIT_QLIST(((QLitObject[]) {
+                QLIT_QDICT(((QLitDictEntry[]) {
+                    { "name", QLIT_QSTR("arg1"), },
+                    { "type", QLIT_QSTR("[1]"), },
+                    {}
+                })),
+                {}
+            })), },
+            { "meta-type", QLIT_QSTR("object"), },
+            { "name", QLIT_QSTR("0"), },
+            {}
+        })),
+        /* "1" = UserDefOne */
+        QLIT_QDICT(((QLitDictEntry[]) {
             { "members", QLIT_QLIST(((QLitObject[]) {
-                { }
-            })) },
-            { "meta-type", QLIT_QSTR("object") },
-            { "name", QLIT_QSTR("0") },
-            { }
+                QLIT_QDICT(((QLitDictEntry[]) {
+                    { "name", QLIT_QSTR("integer"), },
+                    { "type", QLIT_QSTR("int"), },
+                    {}
+                })),
+                QLIT_QDICT(((QLitDictEntry[]) {
+                    { "default", QLIT_QNULL, },
+                    { "name", QLIT_QSTR("string"), },
+                    { "type", QLIT_QSTR("str"), },
+                    {}
+                })),
+                {}
+            })), },
+            { "meta-type", QLIT_QSTR("object"), },
+            { "name", QLIT_QSTR("1"), },
+            {}
         })),
-        ...
-        { }
+        /* "2" = q_empty */
+        QLIT_QDICT(((QLitDictEntry[]) {
+            { "members", QLIT_QLIST(((QLitObject[]) {
+                {}
+            })), },
+            { "meta-type", QLIT_QSTR("object"), },
+            { "name", QLIT_QSTR("2"), },
+            {}
+        })),
+        QLIT_QDICT(((QLitDictEntry[]) {
+            { "element-type", QLIT_QSTR("1"), },
+            { "meta-type", QLIT_QSTR("array"), },
+            { "name", QLIT_QSTR("[1]"), },
+            {}
+        })),
+        QLIT_QDICT(((QLitDictEntry[]) {
+            { "json-type", QLIT_QSTR("int"), },
+            { "meta-type", QLIT_QSTR("builtin"), },
+            { "name", QLIT_QSTR("int"), },
+            {}
+        })),
+        QLIT_QDICT(((QLitDictEntry[]) {
+            { "json-type", QLIT_QSTR("string"), },
+            { "meta-type", QLIT_QSTR("builtin"), },
+            { "name", QLIT_QSTR("str"), },
+            {}
+        })),
+        {}
     }));
+
+[Uninteresting stuff omitted...]
diff --git a/dump.c b/dump.c
index 500b554523..4ec94c5e25 100644
--- a/dump.c
+++ b/dump.c
@@ -1890,8 +1890,7 @@ static void dump_process(DumpState *s, Error **errp)
     /* should never fail */
     assert(result);
     qapi_event_send_dump_completed(result, !!local_err, (local_err ? \
-                                   error_get_pretty(local_err) : NULL),
-                                   &error_abort);
+                                   error_get_pretty(local_err) : NULL));
     qapi_free_DumpQueryResult(result);
 
     error_propagate(errp, local_err);
diff --git a/hw/acpi/core.c b/hw/acpi/core.c
index b8d39012cd..aafdc61648 100644
--- a/hw/acpi/core.c
+++ b/hw/acpi/core.c
@@ -570,7 +570,7 @@ static void acpi_pm1_cnt_write(ACPIREGS *ar, uint16_t val)
             break;
         default:
             if (sus_typ == ar->pm1.cnt.s4_val) { /* S4 request */
-                qapi_event_send_suspend_disk(&error_abort);
+                qapi_event_send_suspend_disk();
                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
             }
             break;
diff --git a/hw/acpi/cpu.c b/hw/acpi/cpu.c
index 5ae595ecbe..d19b7722f0 100644
--- a/hw/acpi/cpu.c
+++ b/hw/acpi/cpu.c
@@ -160,7 +160,7 @@ static void cpu_hotplug_wr(void *opaque, hwaddr addr, uint64_t data,
            cdev = &cpu_st->devs[cpu_st->selector];
            cdev->ost_status = data;
            info = acpi_cpu_device_status(cpu_st->selector, cdev);
-           qapi_event_send_acpi_device_ost(info, &error_abort);
+           qapi_event_send_acpi_device_ost(info);
            qapi_free_ACPIOSTInfo(info);
            trace_cpuhp_acpi_write_ost_status(cpu_st->selector,
                                              cdev->ost_status);
diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
index 0ff1712c4c..8c7c1013f3 100644
--- a/hw/acpi/memory_hotplug.c
+++ b/hw/acpi/memory_hotplug.c
@@ -161,7 +161,7 @@ static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data,
         /* TODO: implement memory removal on guest signal */
 
         info = acpi_memory_device_status(mem_st->selector, mdev);
-        qapi_event_send_acpi_device_ost(info, &error_abort);
+        qapi_event_send_acpi_device_ost(info);
         qapi_free_ACPIOSTInfo(info);
         break;
     case 0x14: /* set is_* fields  */
@@ -185,8 +185,7 @@ static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data,
             if (local_err) {
                 trace_mhp_acpi_pc_dimm_delete_failed(mem_st->selector);
                 qapi_event_send_mem_unplug_error(dev->id,
-                                                 error_get_pretty(local_err),
-                                                 &error_abort);
+                                                 error_get_pretty(local_err));
                 error_free(local_err);
                 break;
             }
diff --git a/hw/char/virtio-console.c b/hw/char/virtio-console.c
index 679a824888..2cbe1d4ed5 100644
--- a/hw/char/virtio-console.c
+++ b/hw/char/virtio-console.c
@@ -114,8 +114,7 @@ static void set_guest_connected(VirtIOSerialPort *port, int guest_connected)
     }
 
     if (dev->id) {
-        qapi_event_send_vserport_change(dev->id, guest_connected,
-                                        &error_abort);
+        qapi_event_send_vserport_change(dev->id, guest_connected);
     }
 }
 
diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index 529b82de18..36b788a66b 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -1000,8 +1000,7 @@ static void device_finalize(Object *obj)
     if (dev->pending_deleted_event) {
         g_assert(dev->canonical_path);
 
-        qapi_event_send_device_deleted(!!dev->id, dev->id, dev->canonical_path,
-                                       &error_abort);
+        qapi_event_send_device_deleted(!!dev->id, dev->id, dev->canonical_path);
         g_free(dev->canonical_path);
         dev->canonical_path = NULL;
     }
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index f154756e85..4bdd5b8532 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -329,7 +329,7 @@ static void rxfilter_notify(NetClientState *nc)
     if (nc->rxfilter_notify_enabled) {
         gchar *path = object_get_canonical_path(OBJECT(n->qdev));
         qapi_event_send_nic_rx_filter_changed(!!n->netclient_name,
-                                              n->netclient_name, path, &error_abort);
+                                              n->netclient_name, path);
         g_free(path);
 
         /* disable event notification to avoid events flooding */
diff --git a/hw/ppc/spapr_rtc.c b/hw/ppc/spapr_rtc.c
index a37360537e..cd049f389d 100644
--- a/hw/ppc/spapr_rtc.c
+++ b/hw/ppc/spapr_rtc.c
@@ -118,7 +118,7 @@ static void rtas_set_time_of_day(PowerPCCPU *cpu, sPAPRMachineState *spapr,
     }
 
     /* Generate a monitor event for the change */
-    qapi_event_send_rtc_change(qemu_timedate_diff(&tm), &error_abort);
+    qapi_event_send_rtc_change(qemu_timedate_diff(&tm));
 
     host_ns = qemu_clock_get_ns(rtc_clock);
 
diff --git a/hw/timer/mc146818rtc.c b/hw/timer/mc146818rtc.c
index a504f0308d..acee47da0e 100644
--- a/hw/timer/mc146818rtc.c
+++ b/hw/timer/mc146818rtc.c
@@ -635,7 +635,7 @@ static void rtc_set_time(RTCState *s)
     s->base_rtc = mktimegm(&tm);
     s->last_update = qemu_clock_get_ns(rtc_clock);
 
-    qapi_event_send_rtc_change(qemu_timedate_diff(&tm), &error_abort);
+    qapi_event_send_rtc_change(qemu_timedate_diff(&tm));
 }
 
 static void rtc_set_cmos(RTCState *s, const struct tm *tm)
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index b5425080c5..1728e4f83a 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -365,8 +365,7 @@ static void virtio_balloon_set_config(VirtIODevice *vdev,
     dev->actual = le32_to_cpu(config.actual);
     if (dev->actual != oldactual) {
         qapi_event_send_balloon_change(vm_ram_size -
-                        ((ram_addr_t) dev->actual << VIRTIO_BALLOON_PFN_SHIFT),
-                        &error_abort);
+                        ((ram_addr_t) dev->actual << VIRTIO_BALLOON_PFN_SHIFT));
     }
     trace_virtio_balloon_set_config(dev->actual, oldactual);
 }
diff --git a/hw/watchdog/watchdog.c b/hw/watchdog/watchdog.c
index 6e8ba061d8..33e6c20184 100644
--- a/hw/watchdog/watchdog.c
+++ b/hw/watchdog/watchdog.c
@@ -102,17 +102,17 @@ void watchdog_perform_action(void)
 {
     switch (watchdog_action) {
     case WATCHDOG_ACTION_RESET:     /* same as 'system_reset' in monitor */
-        qapi_event_send_watchdog(WATCHDOG_ACTION_RESET, &error_abort);
+        qapi_event_send_watchdog(WATCHDOG_ACTION_RESET);
         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
         break;
 
     case WATCHDOG_ACTION_SHUTDOWN:  /* same as 'system_powerdown' in monitor */
-        qapi_event_send_watchdog(WATCHDOG_ACTION_SHUTDOWN, &error_abort);
+        qapi_event_send_watchdog(WATCHDOG_ACTION_SHUTDOWN);
         qemu_system_powerdown_request();
         break;
 
     case WATCHDOG_ACTION_POWEROFF:  /* same as 'quit' command in monitor */
-        qapi_event_send_watchdog(WATCHDOG_ACTION_POWEROFF, &error_abort);
+        qapi_event_send_watchdog(WATCHDOG_ACTION_POWEROFF);
         exit(0);
 
     case WATCHDOG_ACTION_PAUSE:     /* same as 'stop' command in monitor */
@@ -120,22 +120,21 @@ void watchdog_perform_action(void)
          * you would get a deadlock.  Bypass the problem.
          */
         qemu_system_vmstop_request_prepare();
-        qapi_event_send_watchdog(WATCHDOG_ACTION_PAUSE, &error_abort);
+        qapi_event_send_watchdog(WATCHDOG_ACTION_PAUSE);
         qemu_system_vmstop_request(RUN_STATE_WATCHDOG);
         break;
 
     case WATCHDOG_ACTION_DEBUG:
-        qapi_event_send_watchdog(WATCHDOG_ACTION_DEBUG, &error_abort);
+        qapi_event_send_watchdog(WATCHDOG_ACTION_DEBUG);
         fprintf(stderr, "watchdog: timer fired\n");
         break;
 
     case WATCHDOG_ACTION_NONE:
-        qapi_event_send_watchdog(WATCHDOG_ACTION_NONE, &error_abort);
+        qapi_event_send_watchdog(WATCHDOG_ACTION_NONE);
         break;
 
     case WATCHDOG_ACTION_INJECT_NMI:
-        qapi_event_send_watchdog(WATCHDOG_ACTION_INJECT_NMI,
-                                 &error_abort);
+        qapi_event_send_watchdog(WATCHDOG_ACTION_INJECT_NMI);
         nmi_monitor_handle(0, NULL);
         break;
 
diff --git a/include/qapi/qmp-event.h b/include/qapi/qmp-event.h
index 0c87ad833e..23e588ccf8 100644
--- a/include/qapi/qmp-event.h
+++ b/include/qapi/qmp-event.h
@@ -14,8 +14,7 @@
 #ifndef QMP_EVENT_H
 #define QMP_EVENT_H
 
-
-typedef void (*QMPEventFuncEmit)(unsigned event, QDict *dict, Error **errp);
+typedef void (*QMPEventFuncEmit)(unsigned event, QDict *dict);
 
 void qmp_event_set_func_emit(QMPEventFuncEmit emit);
 
diff --git a/job.c b/job.c
index e36ebaafd8..b9ebd1c091 100644
--- a/job.c
+++ b/job.c
@@ -174,7 +174,7 @@ static void job_state_transition(Job *job, JobStatus s1)
     job->status = s1;
 
     if (!job_is_internal(job) && s1 != s0) {
-        qapi_event_send_job_status_change(job->id, job->status, &error_abort);
+        qapi_event_send_job_status_change(job->id, job->status);
     }
 }
 
diff --git a/migration/migration.c b/migration/migration.c
index 4b316ec343..05d0a7296a 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -204,7 +204,7 @@ void migration_incoming_state_destroy(void)
 static void migrate_generate_event(int new_state)
 {
     if (migrate_use_events()) {
-        qapi_event_send_migration(new_state, &error_abort);
+        qapi_event_send_migration(new_state);
     }
 }
 
@@ -302,7 +302,7 @@ void qemu_start_incoming_migration(const char *uri, Error **errp)
 {
     const char *p;
 
-    qapi_event_send_migration(MIGRATION_STATUS_SETUP, &error_abort);
+    qapi_event_send_migration(MIGRATION_STATUS_SETUP);
     if (!strcmp(uri, "defer")) {
         deferred_incoming_migration(errp);
     } else if (strstart(uri, "tcp:", &p)) {
diff --git a/migration/ram.c b/migration/ram.c
index 79c89425a3..f6fd8e5e09 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -1670,7 +1670,7 @@ static void migration_bitmap_sync(RAMState *rs)
         rs->bytes_xfer_prev = bytes_xfer_now;
     }
     if (migrate_use_events()) {
-        qapi_event_send_migration_pass(ram_counters.dirty_sync_count, NULL);
+        qapi_event_send_migration_pass(ram_counters.dirty_sync_count);
     }
 }
 
diff --git a/monitor.c b/monitor.c
index 021c11b1bf..2cdf243c0c 100644
--- a/monitor.c
+++ b/monitor.c
@@ -688,7 +688,7 @@ monitor_qapi_event_queue_no_reenter(QAPIEvent event, QDict *qdict)
 }
 
 static void
-monitor_qapi_event_queue(QAPIEvent event, QDict *qdict, Error **errp)
+monitor_qapi_event_queue(QAPIEvent event, QDict *qdict)
 {
     /*
      * monitor_qapi_event_queue_no_reenter() is not reentrant: it
@@ -4316,8 +4316,7 @@ static void handle_qmp_command(void *opaque, QObject *req, Error *err)
              * that command was dropped.
              */
             qapi_event_send_command_dropped(id,
-                                            COMMAND_DROP_REASON_QUEUE_FULL,
-                                            &error_abort);
+                                            COMMAND_DROP_REASON_QUEUE_FULL);
             qmp_request_free(req_obj);
             return;
         }
diff --git a/scripts/qapi/common.py b/scripts/qapi/common.py
index 02c5c6767a..7b62a4c7b0 100644
--- a/scripts/qapi/common.py
+++ b/scripts/qapi/common.py
@@ -2070,16 +2070,14 @@ extern const QEnumLookup %(c_name)s_lookup;
     return ret
 
 
-def build_params(arg_type, boxed, extra):
-    if not arg_type:
-        assert not boxed
-        return extra
+def build_params(arg_type, boxed, extra=None):
     ret = ''
     sep = ''
     if boxed:
+        assert arg_type
         ret += '%s arg' % arg_type.c_param_type()
         sep = ', '
-    else:
+    elif arg_type:
         assert not arg_type.variants
         for memb in arg_type.members:
             ret += sep
@@ -2090,7 +2088,7 @@ def build_params(arg_type, boxed, extra):
                               c_name(memb.name))
     if extra:
         ret += sep + extra
-    return ret
+    return ret if ret else 'void'
 
 
 #
@@ -2220,6 +2218,7 @@ class QAPIGenC(QAPIGenCCode):
 
     def _bottom(self, fname):
         return mcgen('''
+
 /* Dummy declaration to prevent empty .o file */
 char dummy_%(name)s;
 ''',
diff --git a/scripts/qapi/events.py b/scripts/qapi/events.py
index 764ef177ab..2ed7902424 100644
--- a/scripts/qapi/events.py
+++ b/scripts/qapi/events.py
@@ -18,7 +18,7 @@ from qapi.common import *
 def build_event_send_proto(name, arg_type, boxed):
     return 'void qapi_event_send_%(c_name)s(%(param)s)' % {
         'c_name': c_name(name.lower()),
-        'param': build_params(arg_type, boxed, 'Error **errp')}
+        'param': build_params(arg_type, boxed)}
 
 
 def gen_event_send_decl(name, arg_type, boxed):
@@ -70,7 +70,6 @@ def gen_event_send(name, arg_type, boxed, event_enum_name):
 %(proto)s
 {
     QDict *qmp;
-    Error *err = NULL;
     QMPEventFuncEmit emit;
 ''',
                 proto=build_event_send_proto(name, arg_type, boxed))
@@ -103,45 +102,35 @@ def gen_event_send(name, arg_type, boxed, event_enum_name):
 ''')
         if not arg_type.is_implicit():
             ret += mcgen('''
-    visit_type_%(c_name)s(v, "%(name)s", &arg, &err);
+    visit_type_%(c_name)s(v, "%(name)s", &arg, &error_abort);
 ''',
                          name=name, c_name=arg_type.c_name())
         else:
             ret += mcgen('''
 
-    visit_start_struct(v, "%(name)s", NULL, 0, &err);
-    if (err) {
-        goto out;
-    }
-    visit_type_%(c_name)s_members(v, &param, &err);
-    if (!err) {
-        visit_check_struct(v, &err);
-    }
+    visit_start_struct(v, "%(name)s", NULL, 0, &error_abort);
+    visit_type_%(c_name)s_members(v, &param, &error_abort);
+    visit_check_struct(v, &error_abort);
     visit_end_struct(v, NULL);
 ''',
                          name=name, c_name=arg_type.c_name())
         ret += mcgen('''
-    if (err) {
-        goto out;
-    }
 
     visit_complete(v, &obj);
     qdict_put_obj(qmp, "data", obj);
 ''')
 
     ret += mcgen('''
-    emit(%(c_enum)s, qmp, &err);
+    emit(%(c_enum)s, qmp);
 
 ''',
                  c_enum=c_enum_const(event_enum_name, name))
 
     if arg_type and not arg_type.is_empty():
         ret += mcgen('''
-out:
     visit_free(v);
 ''')
     ret += mcgen('''
-    error_propagate(errp, err);
     qobject_unref(qmp);
 }
 ''')
diff --git a/scripts/qapi/introspect.py b/scripts/qapi/introspect.py
index 189a4edaba..67d6106f77 100644
--- a/scripts/qapi/introspect.py
+++ b/scripts/qapi/introspect.py
@@ -19,12 +19,17 @@ def to_qlit(obj, level=0, suppress_first_indent=False):
         return level * 4 * ' '
 
     if isinstance(obj, tuple):
-        ifobj, ifcond = obj
-        ret = gen_if(ifcond)
+        ifobj, extra = obj
+        ifcond = extra.get('if')
+        comment = extra.get('comment')
+        ret = ''
+        if comment:
+            ret += indent(level) + '/* %s */\n' % comment
+        if ifcond:
+            ret += gen_if(ifcond)
         ret += to_qlit(ifobj, level)
-        endif = gen_endif(ifcond)
-        if endif:
-            ret += '\n' + endif
+        if ifcond:
+            ret += '\n' + gen_endif(ifcond)
         return ret
 
     ret = ''
@@ -89,7 +94,6 @@ class QAPISchemaGenIntrospectVisitor(QAPISchemaMonolithicCVisitor):
         for typ in self._used_types:
             typ.visit(self)
         # generate C
-        # TODO can generate awfully long lines
         name = c_name(self._prefix, protect=False) + 'qmp_schema_qlit'
         self._genh.add(mcgen('''
 #include "qapi/qmp/qlit.h"
@@ -129,8 +133,8 @@ const QLitObject %(c_name)s = %(c_string)s;
         if typ not in self._used_types:
             self._used_types.append(typ)
         # Clients should examine commands and events, not types.  Hide
-        # type names to reduce the temptation.  Also saves a few
-        # characters.
+        # type names as integers to reduce the temptation.  Also, it
+        # saves a few characters on the wire.
         if isinstance(typ, QAPISchemaBuiltinType):
             return typ.name
         if isinstance(typ, QAPISchemaArrayType):
@@ -138,11 +142,21 @@ const QLitObject %(c_name)s = %(c_string)s;
         return self._name(typ.name)
 
     def _gen_qlit(self, name, mtype, obj, ifcond):
+        extra = {}
         if mtype not in ('command', 'event', 'builtin', 'array'):
+            if not self._unmask:
+                # Output a comment to make it easy to map masked names
+                # back to the source when reading the generated output.
+                extra['comment'] = '"%s" = %s' % (self._name(name), name)
             name = self._name(name)
         obj['name'] = name
         obj['meta-type'] = mtype
-        self._qlits.append((obj, ifcond))
+        if ifcond:
+            extra['if'] = ifcond
+        if extra:
+            self._qlits.append((obj, extra))
+        else:
+            self._qlits.append(obj)
 
     def _gen_member(self, member):
         ret = {'name': member.name, 'type': self._use_type(member.type)}
@@ -185,7 +199,7 @@ const QLitObject %(c_name)s = %(c_string)s;
         arg_type = arg_type or self._schema.the_empty_object_type
         ret_type = ret_type or self._schema.the_empty_object_type
         obj = {'arg-type': self._use_type(arg_type),
-               'ret-type': self._use_type(ret_type) }
+               'ret-type': self._use_type(ret_type)}
         if allow_oob:
             obj['allow-oob'] = allow_oob
         self._gen_qlit(name, 'command', obj, ifcond)
diff --git a/scsi/pr-manager-helper.c b/scsi/pr-manager-helper.c
index 3027dde60d..438380fced 100644
--- a/scsi/pr-manager-helper.c
+++ b/scsi/pr-manager-helper.c
@@ -44,8 +44,7 @@ static void pr_manager_send_status_changed_event(PRManagerHelper *pr_mgr)
     char *id = object_get_canonical_path_component(OBJECT(pr_mgr));
 
     if (id) {
-        qapi_event_send_pr_manager_status_changed(id, !!pr_mgr->ioc,
-                                                  &error_abort);
+        qapi_event_send_pr_manager_status_changed(id, !!pr_mgr->ioc);
         g_free(id);
     }
 }
diff --git a/tests/test-qmp-event.c b/tests/test-qmp-event.c
index 8677094ad1..9cddd72adb 100644
--- a/tests/test-qmp-event.c
+++ b/tests/test-qmp-event.c
@@ -95,7 +95,7 @@ static bool qdict_cmp_simple(QDict *a, QDict *b)
 
 /* This function is hooked as final emit function, which can verify the
    correctness. */
-static void event_test_emit(test_QAPIEvent event, QDict *d, Error **errp)
+static void event_test_emit(test_QAPIEvent event, QDict *d)
 {
     QDict *t;
     int64_t s, ms;
@@ -156,7 +156,7 @@ static void test_event_a(TestEventData *data,
     QDict *d;
     d = data->expect;
     qdict_put_str(d, "event", "EVENT_A");
-    qapi_event_send_event_a(&error_abort);
+    qapi_event_send_event_a();
 }
 
 static void test_event_b(TestEventData *data,
@@ -165,7 +165,7 @@ static void test_event_b(TestEventData *data,
     QDict *d;
     d = data->expect;
     qdict_put_str(d, "event", "EVENT_B");
-    qapi_event_send_event_b(&error_abort);
+    qapi_event_send_event_b();
 }
 
 static void test_event_c(TestEventData *data,
@@ -191,7 +191,7 @@ static void test_event_c(TestEventData *data,
     qdict_put_str(d, "event", "EVENT_C");
     qdict_put(d, "data", d_data);
 
-    qapi_event_send_event_c(true, 1, true, &b, "test2", &error_abort);
+    qapi_event_send_event_c(true, 1, true, &b, "test2");
 
     g_free(b.string);
 }
@@ -233,8 +233,7 @@ static void test_event_d(TestEventData *data,
     qdict_put_str(d, "event", "EVENT_D");
     qdict_put(d, "data", d_data);
 
-    qapi_event_send_event_d(&a, "test3", false, NULL, true, ENUM_ONE_VALUE3,
-                           &error_abort);
+    qapi_event_send_event_d(&a, "test3", false, NULL, true, ENUM_ONE_VALUE3);
 
     g_free(struct1.string);
     g_free(a.string);
diff --git a/ui/spice-core.c b/ui/spice-core.c
index f8c0878529..a4fbbc3898 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -218,8 +218,7 @@ static void channel_event(int event, SpiceChannelEventInfo *info)
     switch (event) {
     case SPICE_CHANNEL_EVENT_CONNECTED:
         qapi_event_send_spice_connected(qapi_SpiceServerInfo_base(server),
-                                        qapi_SpiceChannel_base(client),
-                                        &error_abort);
+                                        qapi_SpiceChannel_base(client));
         break;
     case SPICE_CHANNEL_EVENT_INITIALIZED:
         if (auth) {
@@ -228,13 +227,12 @@ static void channel_event(int event, SpiceChannelEventInfo *info)
         }
         add_channel_info(client, info);
         channel_list_add(info);
-        qapi_event_send_spice_initialized(server, client, &error_abort);
+        qapi_event_send_spice_initialized(server, client);
         break;
     case SPICE_CHANNEL_EVENT_DISCONNECTED:
         channel_list_del(info);
         qapi_event_send_spice_disconnected(qapi_SpiceServerInfo_base(server),
-                                           qapi_SpiceChannel_base(client),
-                                           &error_abort);
+                                           qapi_SpiceChannel_base(client));
         break;
     default:
         break;
@@ -287,7 +285,7 @@ static void migrate_connect_complete_cb(SpiceMigrateInstance *sin)
 
 static void migrate_end_complete_cb(SpiceMigrateInstance *sin)
 {
-    qapi_event_send_spice_migrate_completed(&error_abort);
+    qapi_event_send_spice_migrate_completed();
     spice_migration_completed = true;
 }
 
diff --git a/ui/vnc.c b/ui/vnc.c
index ccb1335d86..916a16d312 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -296,14 +296,13 @@ static void vnc_qmp_event(VncState *vs, QAPIEvent event)
 
     switch (event) {
     case QAPI_EVENT_VNC_CONNECTED:
-        qapi_event_send_vnc_connected(si, qapi_VncClientInfo_base(vs->info),
-                                      &error_abort);
+        qapi_event_send_vnc_connected(si, qapi_VncClientInfo_base(vs->info));
         break;
     case QAPI_EVENT_VNC_INITIALIZED:
-        qapi_event_send_vnc_initialized(si, vs->info, &error_abort);
+        qapi_event_send_vnc_initialized(si, vs->info);
         break;
     case QAPI_EVENT_VNC_DISCONNECTED:
-        qapi_event_send_vnc_disconnected(si, vs->info, &error_abort);
+        qapi_event_send_vnc_disconnected(si, vs->info);
         break;
     default:
         break;
diff --git a/vl.c b/vl.c
index 5ba06adf78..10dd690e30 100644
--- a/vl.c
+++ b/vl.c
@@ -1647,8 +1647,7 @@ void qemu_system_reset(ShutdownCause reason)
         qemu_devices_reset();
     }
     if (reason != SHUTDOWN_CAUSE_SUBSYSTEM_RESET) {
-        qapi_event_send_reset(shutdown_caused_by_guest(reason),
-                              &error_abort);
+        qapi_event_send_reset(shutdown_caused_by_guest(reason));
     }
     cpu_synchronize_all_post_reset();
 }
@@ -1661,11 +1660,11 @@ void qemu_system_guest_panicked(GuestPanicInformation *info)
         current_cpu->crash_occurred = true;
     }
     qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE,
-                                   !!info, info, &error_abort);
+                                   !!info, info);
     vm_stop(RUN_STATE_GUEST_PANICKED);
     if (!no_shutdown) {
         qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_POWEROFF,
-                                       !!info, info, &error_abort);
+                                       !!info, info);
         qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_PANIC);
     }
 
@@ -1706,7 +1705,7 @@ static void qemu_system_suspend(void)
     pause_all_vcpus();
     notifier_list_notify(&suspend_notifiers, NULL);
     runstate_set(RUN_STATE_SUSPENDED);
-    qapi_event_send_suspend(&error_abort);
+    qapi_event_send_suspend();
 }
 
 void qemu_system_suspend_request(void)
@@ -1776,7 +1775,7 @@ void qemu_system_shutdown_request(ShutdownCause reason)
 
 static void qemu_system_powerdown(void)
 {
-    qapi_event_send_powerdown(&error_abort);
+    qapi_event_send_powerdown();
     notifier_list_notify(&powerdown_notifiers, NULL);
 }
 
@@ -1819,8 +1818,7 @@ static bool main_loop_should_exit(void)
     request = qemu_shutdown_requested();
     if (request) {
         qemu_kill_report();
-        qapi_event_send_shutdown(shutdown_caused_by_guest(request),
-                                 &error_abort);
+        qapi_event_send_shutdown(shutdown_caused_by_guest(request));
         if (no_shutdown) {
             vm_stop(RUN_STATE_SHUTDOWN);
         } else {
@@ -1843,7 +1841,7 @@ static bool main_loop_should_exit(void)
         notifier_list_notify(&wakeup_notifiers, &wakeup_reason);
         wakeup_reason = QEMU_WAKEUP_REASON_NONE;
         resume_all_vcpus();
-        qapi_event_send_wakeup(&error_abort);
+        qapi_event_send_wakeup();
     }
     if (qemu_powerdown_requested()) {
         qemu_system_powerdown();