diff --git a/qemu/include/exec/memory.h b/qemu/include/exec/memory.h
index 8231aa8f..ebbca270 100644
--- a/qemu/include/exec/memory.h
+++ b/qemu/include/exec/memory.h
@@ -147,6 +147,10 @@ struct MemoryRegionIOMMUOps {
     IOMMUTLBEntry (*translate)(MemoryRegion *iommu, hwaddr addr, bool is_write);
     /* Returns minimum supported page size */
     uint64_t (*get_min_page_size)(MemoryRegion *iommu);
+    /* Called when the first notifier is set */
+    void (*notify_started)(MemoryRegion *iommu);
+    /* Called when the last notifier is removed */
+    void (*notify_stopped)(MemoryRegion *iommu);
 };
 
 struct MemoryRegion {