diff --git a/include/arch/aarch64/arch_helpers.h b/include/arch/aarch64/arch_helpers.h
index 009eb90..10b0a0b 100644
--- a/include/arch/aarch64/arch_helpers.h
+++ b/include/arch/aarch64/arch_helpers.h
@@ -224,6 +224,7 @@
 DEFINE_SYSOP_PARAM_FUNC(xpaci)
 
 void flush_dcache_range(uintptr_t addr, size_t size);
+void flush_dcache_to_popa_range(uintptr_t addr, size_t size);
 void clean_dcache_range(uintptr_t addr, size_t size);
 void inv_dcache_range(uintptr_t addr, size_t size);
 bool is_dcache_enabled(void);
@@ -274,8 +275,10 @@
 DEFINE_SYSOP_TYPE_FUNC(dmb, st)
 DEFINE_SYSOP_TYPE_FUNC(dmb, ld)
 DEFINE_SYSOP_TYPE_FUNC(dsb, ish)
+DEFINE_SYSOP_TYPE_FUNC(dsb, osh)
 DEFINE_SYSOP_TYPE_FUNC(dsb, nsh)
 DEFINE_SYSOP_TYPE_FUNC(dsb, ishst)
+DEFINE_SYSOP_TYPE_FUNC(dsb, oshst)
 DEFINE_SYSOP_TYPE_FUNC(dmb, oshld)
 DEFINE_SYSOP_TYPE_FUNC(dmb, oshst)
 DEFINE_SYSOP_TYPE_FUNC(dmb, osh)
@@ -610,14 +613,13 @@
 }
 
 /*
- * Invalidate cached copies of GPT entries
- * from TLBs by physical address
+ * Invalidate TLBs of GPT entries by Physical address, last level.
  *
  * @pa: the starting address for the range
  *      of invalidation
  * @size: size of the range of invalidation
  */
-void gpt_tlbi_by_pa(uint64_t pa, size_t size);
+void gpt_tlbi_by_pa_ll(uint64_t pa, size_t size);
 
 
 /* Previously defined accessor functions with incomplete register names  */
diff --git a/include/lib/gpt_rme/gpt_rme.h b/include/lib/gpt_rme/gpt_rme.h
index 379b915..94a88b0 100644
--- a/include/lib/gpt_rme/gpt_rme.h
+++ b/include/lib/gpt_rme/gpt_rme.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, Arm Limited. All rights reserved.
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -35,6 +35,13 @@
 #define GPT_GPI_ANY			U(0xF)
 #define GPT_GPI_VAL_MASK		UL(0xF)
 
+#define GPT_NSE_SECURE			U(0b00)
+#define GPT_NSE_ROOT			U(0b01)
+#define GPT_NSE_NS			U(0b10)
+#define GPT_NSE_REALM			U(0b11)
+
+#define GPT_NSE_SHIFT                   U(62)
+
 /* PAS attribute GPI definitions. */
 #define GPT_PAS_ATTR_GPI_SHIFT		U(0)
 #define GPT_PAS_ATTR_GPI_MASK		U(0xF)
@@ -262,15 +269,12 @@
  *   base: Base address of the region to transition, must be aligned to granule
  *         size.
  *   size: Size of region to transition, must be aligned to granule size.
- *   src_sec_state: Security state of the caller.
- *   target_pas: Target PAS of the specified memory region.
+ *   src_sec_state: Security state of the originating SMC invoking the API.
  *
  * Return
  *    Negative Linux error code in the event of a failure, 0 for success.
  */
-int gpt_transition_pas(uint64_t base,
-		       size_t size,
-		       unsigned int src_sec_state,
-		       unsigned int target_pas);
+int gpt_delegate_pas(uint64_t base, size_t size, unsigned int src_sec_state);
+int gpt_undelegate_pas(uint64_t base, size_t size, unsigned int src_sec_state);
 
 #endif /* GPT_RME_H */