memory: add getter for owner
Whenever memory regions are accessed outside the BQL, they need to be
preserved against hot-unplug. MemoryRegions actually do not have their
own reference count; they piggyback on a QOM object, their "owner".
The owner is set at creation time, and there is a function to retrieve
the owner.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 3f48f07..2f3e8e4 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -382,6 +382,13 @@
void memory_region_destroy(MemoryRegion *mr);
/**
+ * memory_region_owner: get a memory region's owner.
+ *
+ * @mr: the memory region being queried.
+ */
+struct Object *memory_region_owner(MemoryRegion *mr);
+
+/**
* memory_region_size: get a memory region's size.
*
* @mr: the memory region being queried.
