diff --git a/lib/mpmm/mpmm.c b/lib/mpmm/mpmm.c
index a66f2aa..dc61cf6 100644
--- a/lib/mpmm/mpmm.c
+++ b/lib/mpmm/mpmm.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, Arm Limited. All rights reserved.
+ * Copyright (c) 2021-2022, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -62,11 +62,25 @@
 	return supported;
 }
 
+/* Defaults to false */
+static bool mpmm_disable_for_errata;
+
 void mpmm_enable(void)
 {
-	bool supported = mpmm_supported();
-
-	if (supported) {
+	if (mpmm_supported()) {
+		if (mpmm_disable_for_errata) {
+			WARN("MPMM: disabled by errata workaround\n");
+			return;
+		}
 		write_cpumpmmcr_el3_mpmm_en(1U);
 	}
 }
+
+/*
+ * This function is called from assembly code very early in BL31 so it must be
+ * small and simple.
+ */
+void mpmm_errata_disable(void)
+{
+	mpmm_disable_for_errata = true;
+}