[PATCH v6 18/33] dimm: get mapped memory region from DIMMDeviceClass->get_memory_region

[Xiao Guangrong <guangrong.xiao@linux.intel.com>]

Curretly, the memory region of backed memory is directly mapped to
guest's address space, however, it is not true for nvdimm device

This patch let dimm device realize this fact and use
DIMMDeviceClass->get_memory_region method to get the mapped memory
region

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
---
 hw/mem/dimm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/mem/dimm.c b/hw/mem/dimm.c
index 4a63409..498d380 100644
--- a/hw/mem/dimm.c
+++ b/hw/mem/dimm.c
@@ -377,8 +377,9 @@ static void dimm_get_size(Object *obj, Visitor *v, void *opaque,
     int64_t value;
     MemoryRegion *mr;
     DIMMDevice *dimm = DIMM(obj);
+    DIMMDeviceClass *ddc = DIMM_GET_CLASS(obj);
 
-    mr = host_memory_backend_get_memory(dimm->hostmem, errp);
+    mr = ddc->get_memory_region(dimm);
     value = memory_region_size(mr);
 
     visit_type_int(v, &value, name, errp);
-- 
1.8.3.1