diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c
index b8a2e62..5f728a6 100644
--- a/hw/acpi/nvdimm.c
+++ b/hw/acpi/nvdimm.c
@@ -348,8 +348,9 @@ static void nvdimm_build_structure_dcr(GArray *structures, DeviceState *dev)
                                          (DSM) in DSM Spec Rev1.*/);
 }
 
-static GArray *nvdimm_build_device_structure(GSList *device_list)
+static GArray *nvdimm_build_device_structure(void)
 {
+    GSList *device_list = nvdimm_get_plugged_device_list();
     GArray *structures = g_array_new(false, true /* clear */, 1);
 
     for (; device_list; device_list = device_list->next) {
@@ -367,28 +368,58 @@ static GArray *nvdimm_build_device_structure(GSList *device_list)
         /* build NVDIMM Control Region Structure. */
         nvdimm_build_structure_dcr(structures, dev);
     }
+    g_slist_free(device_list);
 
     return structures;
 }
 
-static void nvdimm_build_nfit(GSList *device_list, GArray *table_offsets,
+static void nvdimm_init_fit_buffer(NvdimmFitBuffer *fit_buf)
+{
+    qemu_mutex_init(&fit_buf->lock);
+    fit_buf->fit = g_array_new(false, true /* clear */, 1);
+}
+
+static void nvdimm_build_fit_buffer(NvdimmFitBuffer *fit_buf)
+{
+    qemu_mutex_lock(&fit_buf->lock);
+    g_array_free(fit_buf->fit, true);
+    fit_buf->fit = nvdimm_build_device_structure();
+    fit_buf->dirty = true;
+    qemu_mutex_unlock(&fit_buf->lock);
+}
+
+void nvdimm_acpi_hotplug(AcpiNVDIMMState *state)
+{
+    nvdimm_build_fit_buffer(&state->fit_buf);
+}
+
+static void nvdimm_build_nfit(AcpiNVDIMMState *state, GArray *table_offsets,
                               GArray *table_data, BIOSLinker *linker)
 {
-    GArray *structures = nvdimm_build_device_structure(device_list);
+    NvdimmFitBuffer *fit_buf = &state->fit_buf;
     unsigned int header;
 
+    qemu_mutex_lock(&fit_buf->lock);
+
+    /* NVDIMM device is not plugged? */
+    if (!fit_buf->fit->len) {
+        goto exit;
+    }
+
     acpi_add_table(table_offsets, table_data);
 
     /* NFIT header. */
     header = table_data->len;
     acpi_data_push(table_data, sizeof(NvdimmNfitHeader));
     /* NVDIMM device structures. */
-    g_array_append_vals(table_data, structures->data, structures->len);
+    g_array_append_vals(table_data, fit_buf->fit->data, fit_buf->fit->len);
 
     build_header(linker, table_data,
                  (void *)(table_data->data + header), "NFIT",
-                 sizeof(NvdimmNfitHeader) + structures->len, 1, NULL, NULL);
-    g_array_free(structures, true);
+                 sizeof(NvdimmNfitHeader) + fit_buf->fit->len, 1, NULL, NULL);
+
+exit:
+    qemu_mutex_unlock(&fit_buf->lock);
 }
 
 struct NvdimmDsmIn {
@@ -771,6 +802,8 @@ void nvdimm_init_acpi_state(AcpiNVDIMMState *state, MemoryRegion *io,
     acpi_data_push(state->dsm_mem, sizeof(NvdimmDsmIn));
     fw_cfg_add_file(fw_cfg, NVDIMM_DSM_MEM_FILE, state->dsm_mem->data,
                     state->dsm_mem->len);
+
+    nvdimm_init_fit_buffer(&state->fit_buf);
 }
 
 #define NVDIMM_COMMON_DSM       "NCAL"
@@ -1045,25 +1078,17 @@ static void nvdimm_build_ssdt(GArray *table_offsets, GArray *table_data,
 }
 
 void nvdimm_build_acpi(GArray *table_offsets, GArray *table_data,
-                       BIOSLinker *linker, GArray *dsm_dma_arrea,
+                       BIOSLinker *linker, AcpiNVDIMMState *state,
                        uint32_t ram_slots)
 {
-    GSList *device_list;
-
-    device_list = nvdimm_get_plugged_device_list();
-
-    /* NVDIMM device is plugged. */
-    if (device_list) {
-        nvdimm_build_nfit(device_list, table_offsets, table_data, linker);
-        g_slist_free(device_list);
-    }
+    nvdimm_build_nfit(state, table_offsets, table_data, linker);
 
     /*
      * NVDIMM device is allowed to be plugged only if there is available
      * slot.
      */
     if (ram_slots) {
-        nvdimm_build_ssdt(table_offsets, table_data, linker, dsm_dma_arrea,
+        nvdimm_build_ssdt(table_offsets, table_data, linker, state->dsm_mem,
                           ram_slots);
     }
 }
diff --git a/hw/core/hotplug.c b/hw/core/hotplug.c
index 17ac986..ab34c19 100644
--- a/hw/core/hotplug.c
+++ b/hw/core/hotplug.c
@@ -35,6 +35,17 @@ void hotplug_handler_plug(HotplugHandler *plug_handler,
     }
 }
 
+void hotplug_handler_post_plug(HotplugHandler *plug_handler,
+                               DeviceState *plugged_dev,
+                               Error **errp)
+{
+    HotplugHandlerClass *hdc = HOTPLUG_HANDLER_GET_CLASS(plug_handler);
+
+    if (hdc->post_plug) {
+        hdc->post_plug(plug_handler, plugged_dev, errp);
+    }
+}
+
 void hotplug_handler_unplug_request(HotplugHandler *plug_handler,
                                     DeviceState *plugged_dev,
                                     Error **errp)
diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index 5783442..d835e62 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -945,10 +945,21 @@ static void device_set_realized(Object *obj, bool value, Error **errp)
                 goto child_realize_fail;
             }
         }
+
         if (dev->hotplugged) {
             device_reset(dev);
         }
         dev->pending_deleted_event = false;
+        dev->realized = value;
+
+        if (hotplug_ctrl) {
+            hotplug_handler_post_plug(hotplug_ctrl, dev, &local_err);
+        }
+
+        if (local_err != NULL) {
+            dev->realized = value;
+            goto post_realize_fail;
+        }
     } else if (!value && dev->realized) {
         Error **local_errp = NULL;
         QLIST_FOREACH(bus, &dev->child_bus, sibling) {
@@ -965,13 +976,14 @@ static void device_set_realized(Object *obj, bool value, Error **errp)
         }
         dev->pending_deleted_event = true;
         DEVICE_LISTENER_CALL(unrealize, Reverse, dev);
-    }
 
-    if (local_err != NULL) {
-        goto fail;
+        if (local_err != NULL) {
+            goto fail;
+        }
+
+        dev->realized = value;
     }
 
-    dev->realized = value;
     return;
 
 child_realize_fail:
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 6ae4769..bc49958 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -2767,7 +2767,7 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
     }
     if (pcms->acpi_nvdimm_state.is_enabled) {
         nvdimm_build_acpi(table_offsets, tables_blob, tables->linker,
-                          pcms->acpi_nvdimm_state.dsm_mem, machine->ram_slots);
+                          &pcms->acpi_nvdimm_state, machine->ram_slots);
     }
 
     /* Add tables supplied by user (if any) */
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 93ff49c..3be6304 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1706,6 +1706,16 @@ out:
     error_propagate(errp, local_err);
 }
 
+static void pc_dimm_post_plug(HotplugHandler *hotplug_dev,
+                              DeviceState *dev, Error **errp)
+{
+    PCMachineState *pcms = PC_MACHINE(hotplug_dev);
+
+    if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) {
+        nvdimm_acpi_hotplug(&pcms->acpi_nvdimm_state);
+    }
+}
+
 static void pc_dimm_unplug_request(HotplugHandler *hotplug_dev,
                                    DeviceState *dev, Error **errp)
 {
@@ -1966,6 +1976,14 @@ static void pc_machine_device_plug_cb(HotplugHandler *hotplug_dev,
     }
 }
 
+static void pc_machine_device_post_plug_cb(HotplugHandler *hotplug_dev,
+                                           DeviceState *dev, Error **errp)
+{
+    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
+        pc_dimm_post_plug(hotplug_dev, dev, errp);
+    }
+}
+
 static void pc_machine_device_unplug_request_cb(HotplugHandler *hotplug_dev,
                                                 DeviceState *dev, Error **errp)
 {
@@ -2300,6 +2318,7 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
     mc->reset = pc_machine_reset;
     hc->pre_plug = pc_machine_device_pre_plug_cb;
     hc->plug = pc_machine_device_plug_cb;
+    hc->post_plug = pc_machine_device_post_plug_cb;
     hc->unplug_request = pc_machine_device_unplug_request_cb;
     hc->unplug = pc_machine_device_unplug_cb;
     nc->nmi_monitor_handler = x86_nmi;
diff --git a/include/hw/hotplug.h b/include/hw/hotplug.h
index c0db869..10ca5b6 100644
--- a/include/hw/hotplug.h
+++ b/include/hw/hotplug.h
@@ -47,6 +47,7 @@ typedef void (*hotplug_fn)(HotplugHandler *plug_handler,
  * @parent: Opaque parent interface.
  * @pre_plug: pre plug callback called at start of device.realize(true)
  * @plug: plug callback called at end of device.realize(true).
+ * @post_pug: post plug callback called after device is successfully plugged.
  * @unplug_request: unplug request callback.
  *                  Used as a means to initiate device unplug for devices that
  *                  require asynchronous unplug handling.
@@ -61,6 +62,7 @@ typedef struct HotplugHandlerClass {
     /* <public> */
     hotplug_fn pre_plug;
     hotplug_fn plug;
+    hotplug_fn post_plug;
     hotplug_fn unplug_request;
     hotplug_fn unplug;
 } HotplugHandlerClass;
@@ -83,6 +85,14 @@ void hotplug_handler_pre_plug(HotplugHandler *plug_handler,
                               DeviceState *plugged_dev,
                               Error **errp);
 
+/**
+ * hotplug_handler_post_plug:
+ *
+ * Call #HotplugHandlerClass.post_plug callback of @plug_handler.
+ */
+void hotplug_handler_post_plug(HotplugHandler *plug_handler,
+                               DeviceState *plugged_dev,
+                               Error **errp);
 
 /**
  * hotplug_handler_unplug_request:
diff --git a/include/hw/mem/nvdimm.h b/include/hw/mem/nvdimm.h
index 63a2b20..33cd421 100644
--- a/include/hw/mem/nvdimm.h
+++ b/include/hw/mem/nvdimm.h
@@ -98,12 +98,35 @@ typedef struct NVDIMMClass NVDIMMClass;
 #define NVDIMM_ACPI_IO_BASE     0x0a18
 #define NVDIMM_ACPI_IO_LEN      4
 
+/*
+ * The buffer, @fit, saves the FIT info for all the presented NVDIMM
+ * devices which is updated after the NVDIMM device is plugged or
+ * unplugged.
+ *
+ * Rules to use the buffer:
+ *    1) the user should hold the @lock to access the buffer.
+ *    2) mark @dirty whenever the buffer is updated.
+ *
+ * These rules preserve NVDIMM ACPI _FIT method to read incomplete
+ * or obsolete fit info if fit update happens during multiple RFIT
+ * calls.
+ */
+struct NvdimmFitBuffer {
+    QemuMutex lock;
+    GArray *fit;
+    bool dirty;
+};
+typedef struct NvdimmFitBuffer NvdimmFitBuffer;
+
 struct AcpiNVDIMMState {
     /* detect if NVDIMM support is enabled. */
     bool is_enabled;
 
     /* the data of the fw_cfg file NVDIMM_DSM_MEM_FILE. */
     GArray *dsm_mem;
+
+    NvdimmFitBuffer fit_buf;
+
     /* the IO region used by OSPM to transfer control to QEMU. */
     MemoryRegion io_mr;
 };
@@ -112,6 +135,7 @@ typedef struct AcpiNVDIMMState AcpiNVDIMMState;
 void nvdimm_init_acpi_state(AcpiNVDIMMState *state, MemoryRegion *io,
                             FWCfgState *fw_cfg, Object *owner);
 void nvdimm_build_acpi(GArray *table_offsets, GArray *table_data,
-                       BIOSLinker *linker, GArray *dsm_dma_arrea,
+                       BIOSLinker *linker, AcpiNVDIMMState *state,
                        uint32_t ram_slots);
+void nvdimm_acpi_hotplug(AcpiNVDIMMState *state);
 #endif
