hw/acpi: Add ospm_status hook implementation for acpi-ged

Setup an ARM virtual machine of machine virt and execute qmp "query-acpi-ospm-status"
causes segmentation fault with following dumpstack:
 espressif#1  0x0000aaaaab64235c in qmp_query_acpi_ospm_status (errp=errp@entry=0xfffffffff030) at ../monitor/qmp-cmds.c:312
 espressif#2  0x0000aaaaabfc4e20 in qmp_marshal_query_acpi_ospm_status (args=<optimized out>, ret=0xffffea4ffe90, errp=0xffffea4ffe88) at qapi/qapi-commands-acpi.c:63
 espressif#3  0x0000aaaaabff8ba0 in do_qmp_dispatch_bh (opaque=0xffffea4ffe98) at ../qapi/qmp-dispatch.c:128
 espressif#4  0x0000aaaaac02e594 in aio_bh_call (bh=0xffffe0004d80) at ../util/async.c:150
 espressif#5  aio_bh_poll (ctx=ctx@entry=0xaaaaad0f6040) at ../util/async.c:178
 espressif#6  0x0000aaaaac00bd40 in aio_dispatch (ctx=ctx@entry=0xaaaaad0f6040) at ../util/aio-posix.c:421
 espressif#7  0x0000aaaaac02e010 in aio_ctx_dispatch (source=0xaaaaad0f6040, callback=<optimized out>, user_data=<optimized out>) at ../util/async.c:320
 espressif#8  0x0000fffff76f6884 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
 espressif#9  0x0000aaaaac0452d4 in glib_pollfds_poll () at ../util/main-loop.c:297
 espressif#10 os_host_main_loop_wait (timeout=0) at ../util/main-loop.c:320
 espressif#11 main_loop_wait (nonblocking=nonblocking@entry=0) at ../util/main-loop.c:596
 espressif#12 0x0000aaaaab5c9e50 in qemu_main_loop () at ../softmmu/runstate.c:734
 espressif#13 0x0000aaaaab185370 in qemu_main (argc=argc@entry=47, argv=argv@entry=0xfffffffff518, envp=envp@entry=0x0) at ../softmmu/main.c:38
 espressif#14 0x0000aaaaab16f99c in main (argc=47, argv=0xfffffffff518) at ../softmmu/main.c:47

Fixes: ebb6207 ("hw/acpi: Add ACPI Generic Event Device Support")
Signed-off-by: Keqian Zhu <[email protected]>
Reviewed-by: Igor Mammedov <[email protected]>
Message-id: [email protected]
Signed-off-by: Peter Maydell <[email protected]>

hw/acpi/generic_event_device.c

@@ -267,6 +267,13 @@ static void acpi_ged_unplug_cb(HotplugHandler *hotplug_dev,
     }
 }
 
+static void acpi_ged_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
+{
+    AcpiGedState *s = ACPI_GED(adev);
+
+    acpi_memory_ospm_status(&s->memhp_state, list);
+}
+
 static void acpi_ged_send_event(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
 {
     AcpiGedState *s = ACPI_GED(adev);
@@ -409,6 +416,7 @@ static void acpi_ged_class_init(ObjectClass *class, void *data)
     hc->unplug_request = acpi_ged_unplug_request_cb;
     hc->unplug = acpi_ged_unplug_cb;
 
+    adevc->ospm_status = acpi_ged_ospm_status;
     adevc->send_event = acpi_ged_send_event;
 }