[PATCH v3 20/32] dimm: introduce realize callback

[Xiao Guangrong <guangrong.xiao@xxxxxxxxxxxxxxx>]

nvdimm need check if the backend memory is large enough to contain label
data and init its memory region when the device is realized, so introduce
realize callback which is called after common dimm has been realize

Signed-off-by: Xiao Guangrong <guangrong.xiao@xxxxxxxxxxxxxxx>
---
 hw/mem/dimm.c         | 5 +++++
 include/hw/mem/dimm.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/hw/mem/dimm.c b/hw/mem/dimm.c
index efe964a..7a87761 100644
--- a/hw/mem/dimm.c
+++ b/hw/mem/dimm.c
@@ -422,6 +422,7 @@ static void dimm_init(Object *obj)
 static void dimm_realize(DeviceState *dev, Error **errp)
 {
     DIMMDevice *dimm = DIMM(dev);
+    DIMMDeviceClass *ddc = DIMM_GET_CLASS(dimm);
 
     if (!dimm->hostmem) {
         error_setg(errp, "'" DIMM_MEMDEV_PROP "' property is not set");
@@ -434,6 +435,10 @@ static void dimm_realize(DeviceState *dev, Error **errp)
                    dimm->node, nb_numa_nodes ? nb_numa_nodes : 1);
         return;
     }
+
+    if (ddc->realize) {
+        ddc->realize(dimm, errp);
+    }
 }
 
 static void dimm_class_init(ObjectClass *oc, void *data)
diff --git a/include/hw/mem/dimm.h b/include/hw/mem/dimm.h
index 84a62ed..663288d 100644
--- a/include/hw/mem/dimm.h
+++ b/include/hw/mem/dimm.h
@@ -65,6 +65,7 @@ typedef struct DIMMDeviceClass {
     DeviceClass parent_class;
 
     /* public */
+    void (*realize)(DIMMDevice *dimm, Error **errp);
     MemoryRegion *(*get_memory_region)(DIMMDevice *dimm);
 } DIMMDeviceClass;
 
-- 
1.8.3.1

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