Index: llvm/docs/ReleaseNotes.rst
===================================================================
--- llvm/docs/ReleaseNotes.rst
+++ llvm/docs/ReleaseNotes.rst
@@ -77,7 +77,8 @@
 Changes to the AArch64 Backend
 ------------------------------
 
-* Introduced support for Armv9-A's Realm Management Extension.
+* Introduced assembly support for Armv9-A's Realm Management Extension and
+  Scalable Matrix Extension.
 
 Changes to the ARM Backend
 --------------------------