qmp: add query-memory-devices command

... allowing to get state of present memory devices.
Currently implemented only for PCDIMMDevice.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index 8c2656821a..ad176b700b 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -23,6 +23,45 @@
 #include "qapi/visitor.h"
 #include "qemu/range.h"
 
+int qmp_pc_dimm_device_list(Object *obj, void *opaque)
+{
+    MemoryDeviceInfoList ***prev = opaque;
+
+    if (object_dynamic_cast(obj, TYPE_PC_DIMM)) {
+        DeviceState *dev = DEVICE(obj);
+
+        if (dev->realized) {
+            MemoryDeviceInfoList *elem = g_new0(MemoryDeviceInfoList, 1);
+            MemoryDeviceInfo *info = g_new0(MemoryDeviceInfo, 1);
+            PCDIMMDeviceInfo *di = g_new0(PCDIMMDeviceInfo, 1);
+            DeviceClass *dc = DEVICE_GET_CLASS(obj);
+            PCDIMMDevice *dimm = PC_DIMM(obj);
+
+            if (dev->id) {
+                di->has_id = true;
+                di->id = g_strdup(dev->id);
+            }
+            di->hotplugged = dev->hotplugged;
+            di->hotpluggable = dc->hotpluggable;
+            di->addr = dimm->addr;
+            di->slot = dimm->slot;
+            di->node = dimm->node;
+            di->size = object_property_get_int(OBJECT(dimm), PC_DIMM_SIZE_PROP,
+                                               NULL);
+            di->memdev = object_get_canonical_path(OBJECT(dimm->hostmem));
+
+            info->dimm = di;
+            elem->value = info;
+            elem->next = NULL;
+            **prev = elem;
+            *prev = &elem->next;
+        }
+    }
+
+    object_child_foreach(obj, qmp_pc_dimm_device_list, opaque);
+    return 0;
+}
+
 static int pc_dimm_slot2bitmap(Object *obj, void *opaque)
 {
     unsigned long *bitmap = opaque;