diff --git a/include/lib/extensions/pauth.h b/include/lib/extensions/pauth.h
index d072f5c..c8d577f 100644
--- a/include/lib/extensions/pauth.h
+++ b/include/lib/extensions/pauth.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2023, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -7,6 +7,7 @@
 #ifndef PAUTH_H
 #define PAUTH_H
 
+#include <stdbool.h>
 #include <stdint.h>
 
 #ifdef __aarch64__
@@ -18,6 +19,22 @@
 
 /* Disable ARMv8.3-PAuth */
 void pauth_disable(void);
+
+/*
+ * Fill Pauth Keys and template with random values if keys werenot initialized earlier,
+ * Else Copy PAuth key registers to template.
+ */
+void pauth_test_lib_fill_regs_and_template(void);
+
+/* Read and Compare PAuth registers with provided template values. */
+bool pauth_test_lib_compare_template(void);
+
+/* Read and Store PAuth registers in template. */
+void pauth_test_lib_read_keys(void);
+
+/* Test PAuth instructions. */
+void pauth_test_lib_test_intrs(void);
+
 #endif	/* __aarch64__ */
 
 #endif /* PAUTH_H */
diff --git a/include/runtime_services/host_realm_managment/host_shared_data.h b/include/runtime_services/host_realm_managment/host_shared_data.h
index 98ab287..821a62f 100644
--- a/include/runtime_services/host_realm_managment/host_shared_data.h
+++ b/include/runtime_services/host_realm_managment/host_shared_data.h
@@ -55,7 +55,10 @@
 	REALM_SVE_ID_REGISTERS,
 	REALM_SVE_PROBE_VL,
 	REALM_SVE_OPS,
-	REALM_SVE_FILL_REGS
+	REALM_SVE_FILL_REGS,
+	REALM_PAUTH_SET_CMD,
+	REALM_PAUTH_CHECK_CMD,
+	REALM_PAUTH_FAULT
 };
 
 /*