[Qemu-devel] [RFC 5/5] qmp: add ACPI_DEVICE_OST event handling

[Igor Mammedov]

emmits event when ACPI OSPM evaluates _OST method
of ACPI device.

Signed-off-by: Igor Mammedov <address@hidden>
---
 docs/qmp/qmp-events.txt   |   10 ++++++++++
 hw/acpi/memory_hotplug.c  |   29 ++++++++++++++++++++++++++++-
 include/monitor/monitor.h |    1 +
 monitor.c                 |    1 +
 4 files changed, 40 insertions(+), 1 deletions(-)

diff --git a/docs/qmp/qmp-events.txt b/docs/qmp/qmp-events.txt
index 145402e..f22df3b 100644
--- a/docs/qmp/qmp-events.txt
+++ b/docs/qmp/qmp-events.txt
@@ -539,3 +539,13 @@ Example:
 
 Note: If action is "reset", "shutdown", or "pause" the WATCHDOG event is
 followed respectively by the RESET, SHUTDOWN, or STOP events.
+
+ACPI_DEVICE_OST
+---------------
+
+Emitted when guest executes ACPI _OST method.
+
+ - data: ACPIOSTInfo type
+
+{ "event": "ACPI_DEVICE_OST",
+     "data": { 'device': 'd1', 'slot': 0, 'source': 1, 'status': 0 } }
diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
index 9a81ebc..e1e069a 100644
--- a/hw/acpi/memory_hotplug.c
+++ b/hw/acpi/memory_hotplug.c
@@ -3,6 +3,10 @@
 #include "hw/mem/dimm.h"
 #include "hw/boards.h"
 #include "trace.h"
+#include "qapi-visit.h"
+#include "monitor/monitor.h"
+#include "qapi/dealloc-visitor.h"
+#include "qapi/qmp-output-visitor.h"
 
 static ACPIOSTInfo *acpi_memory_device_status(int slot, MemStatus *mdev)
 {
@@ -31,6 +35,29 @@ void acpi_memory_ospm_status(MemHotplugState *mem_st, 
ACPIOSTInfoList ***list)
     }
 }
 
+static void acpi_memory_ost_mon_event(const MemHotplugState *mem_st)
+{
+    Visitor *v;
+    QObject *out_info;
+    QapiDeallocVisitor *md;
+    QmpOutputVisitor *mo = qmp_output_visitor_new();
+    MemStatus *mdev = &mem_st->devs[mem_st->selector];
+    ACPIOSTInfo *info = acpi_memory_device_status(mem_st->selector, mdev);
+
+    v = qmp_output_get_visitor(mo);
+    visit_type_ACPIOSTInfo(v, &info, "unused", NULL);
+
+    out_info = qmp_output_get_qobject(mo);
+    monitor_protocol_event(QEVENT_ACPI_OST, out_info);
+    qobject_decref(out_info);
+
+    qmp_output_visitor_cleanup(mo);
+    md = qapi_dealloc_visitor_new();
+    v = qapi_dealloc_get_visitor(md);
+    visit_type_ACPIOSTInfo(v, &info, "unused", NULL);
+    qapi_dealloc_visitor_cleanup(md);
+}
+
 static uint64_t acpi_memory_hotplug_read(void *opaque, hwaddr addr,
                                          unsigned int size)
 {
@@ -115,8 +142,8 @@ static void acpi_memory_hotplug_write(void *opaque, hwaddr 
addr, uint64_t data,
         mdev = &mem_st->devs[mem_st->selector];
         mdev->ost_status = data;
         trace_mhp_acpi_write_ost_status(mem_st->selector, mdev->ost_status);
-        /* TODO: report async error */
         /* TODO: implement memory removal on guest signal */
+        acpi_memory_ost_mon_event(mem_st);
         break;
     case 0x14:
         mdev = &mem_st->devs[mem_st->selector];
diff --git a/include/monitor/monitor.h b/include/monitor/monitor.h
index 1c1f56f..97696ea 100644
--- a/include/monitor/monitor.h
+++ b/include/monitor/monitor.h
@@ -51,6 +51,7 @@ typedef enum MonitorEvent {
     QEVENT_BLOCK_IMAGE_CORRUPTED,
     QEVENT_QUORUM_FAILURE,
     QEVENT_QUORUM_REPORT_BAD,
+    QEVENT_ACPI_OST,
 
     /* Add to 'monitor_event_names' array in monitor.c when
      * defining new events here */
diff --git a/monitor.c b/monitor.c
index 593679a..c9717c2 100644
--- a/monitor.c
+++ b/monitor.c
@@ -485,6 +485,7 @@ static const char *monitor_event_names[] = {
     [QEVENT_BLOCK_IMAGE_CORRUPTED] = "BLOCK_IMAGE_CORRUPTED",
     [QEVENT_QUORUM_FAILURE] = "QUORUM_FAILURE",
     [QEVENT_QUORUM_REPORT_BAD] = "QUORUM_REPORT_BAD",
+    [QEVENT_ACPI_OST] = "ACPI_DEVICE_OST",
 };
 QEMU_BUILD_BUG_ON(ARRAY_SIZE(monitor_event_names) != QEVENT_MAX)
 
-- 
1.7.1