diff --git a/include/services/sprt_svc.h b/include/services/sprt_svc.h
index ccc4eb3..b6b51dd 100644
--- a/include/services/sprt_svc.h
+++ b/include/services/sprt_svc.h
@@ -53,6 +53,15 @@
 #define SPRT_MEMORY_PERM_ATTR_GET_AARCH64	SPRT_SMC_64(SPRT_FID_MEMORY_PERM_ATTR_GET)
 #define SPRT_MEMORY_PERM_ATTR_SET_AARCH64	SPRT_SMC_64(SPRT_FID_MEMORY_PERM_ATTR_SET)
 
+/* Defines used by SPRT_MEMORY_PERM_ATTR_{GET,SET}_AARCH64 */
+
+#define SPRT_MEMORY_PERM_ATTR_RO	U(0)
+#define SPRT_MEMORY_PERM_ATTR_RW	U(1)
+#define SPRT_MEMORY_PERM_ATTR_RO_EXEC	U(2)
+/* U(3) is reserved */
+#define SPRT_MEMORY_PERM_ATTR_MASK	U(3)
+#define SPRT_MEMORY_PERM_ATTR_SHIFT	3
+
 /* SPRT error codes. */
 
 #define SPRT_SUCCESS		 0