diff --git a/Makefile b/Makefile
index 7058d57..6b1f47c 100644
--- a/Makefile
+++ b/Makefile
@@ -363,8 +363,8 @@
 # Setup ARCH_MAJOR/MINOR before parsing arch_features.
 ################################################################################
 ifeq (${ENABLE_RME},1)
-	ARM_ARCH_MAJOR := 8
-	ARM_ARCH_MINOR := 6
+	ARM_ARCH_MAJOR := 9
+	ARM_ARCH_MINOR := 2
 endif
 
 ################################################################################
diff --git a/docs/getting_started/prerequisites.rst b/docs/getting_started/prerequisites.rst
index e48ba56..203d628 100644
--- a/docs/getting_started/prerequisites.rst
+++ b/docs/getting_started/prerequisites.rst
@@ -11,12 +11,11 @@
 Build Host
 ----------
 
-|TF-A| can be built using either a Linux or a Windows machine as the build host.
+|TF-A| can be compiled on both Linux and Windows-based machines.
+However, we strongly recommend using a UNIX-compatible build environment.
 
-A relatively recent Linux distribution is recommended for building |TF-A|. We
-have performed tests using Ubuntu 22.04 LTS (64-bit) but other distributions
-should also work fine as a base, provided that the necessary tools and libraries
-can be installed.
+Testing is performed using Ubuntu 22.04 LTS (64-bit), but other distributions
+should also work, provided the necessary tools and libraries are installed.
 
 .. _prerequisites_toolchain:
 
@@ -43,10 +42,6 @@
    reports are always welcome.
 
 .. note::
-   The software has also been built on Windows 7 Enterprise SP1, using CMD.EXE,
-   Cygwin, and Msys (MinGW) shells, using version 5.3.1 of the GNU toolchain.
-
-.. note::
    For instructions on how to select the cross compiler refer to
    :ref:`Performing an Initial Build`.
 
diff --git a/include/lib/el3_runtime/context_el2.h b/include/lib/el3_runtime/context_el2.h
index 4ad9634..04f6587 100644
--- a/include/lib/el3_runtime/context_el2.h
+++ b/include/lib/el3_runtime/context_el2.h
@@ -49,9 +49,9 @@
 	uint64_t vttbr_el2;
 } el2_common_regs_t;
 
-typedef struct el2_mte_regs {
+typedef struct el2_mte2_regs {
 	uint64_t tfsr_el2;
-} el2_mte_regs_t;
+} el2_mte2_regs_t;
 
 typedef struct el2_fgt_regs {
 	uint64_t hdfgrtr_el2;
@@ -118,8 +118,8 @@
 
 	el2_common_regs_t common;
 
-#if ENABLE_FEAT_MTE
-	el2_mte_regs_t mte;
+#if ENABLE_FEAT_MTE2
+	el2_mte2_regs_t mte2;
 #endif
 
 #if ENABLE_FEAT_FGT
@@ -185,14 +185,14 @@
 #define write_el2_ctx_common(ctx, reg, val)	((((ctx)->common).reg)	\
 							= (uint64_t) (val))
 
-#if ENABLE_FEAT_MTE
-#define read_el2_ctx_mte(ctx, reg)		(((ctx)->mte).reg)
-#define write_el2_ctx_mte(ctx, reg, val)	((((ctx)->mte).reg)	\
+#if ENABLE_FEAT_MTE2
+#define read_el2_ctx_mte2(ctx, reg)		(((ctx)->mte2).reg)
+#define write_el2_ctx_mte2(ctx, reg, val)	((((ctx)->mte2).reg)	\
 							= (uint64_t) (val))
 #else
-#define read_el2_ctx_mte(ctx, reg)		ULL(0)
-#define write_el2_ctx_mte(ctx, reg, val)
-#endif /* ENABLE_FEAT_MTE */
+#define read_el2_ctx_mte2(ctx, reg)		ULL(0)
+#define write_el2_ctx_mte2(ctx, reg, val)
+#endif /* ENABLE_FEAT_MTE2 */
 
 #if ENABLE_FEAT_FGT
 #define read_el2_ctx_fgt(ctx, reg)		(((ctx)->fgt).reg)
diff --git a/include/lib/transfer_list.h b/include/lib/transfer_list.h
index bc915a4..c5df22b 100644
--- a/include/lib/transfer_list.h
+++ b/include/lib/transfer_list.h
@@ -75,9 +75,8 @@
 	 */
 };
 
-struct transfer_list_entry {
-	uint16_t tag_id;
-	uint8_t reserved0; /* place holder */
+struct __attribute__((packed)) transfer_list_entry {
+	uint32_t tag_id : 24;
 	uint8_t hdr_size;
 	uint32_t data_size;
 	/*
@@ -91,6 +90,8 @@
 	 */
 };
 
+CASSERT(sizeof(struct transfer_list_entry) == U(0x8), assert_transfer_list_entry_size);
+
 void transfer_list_dump(struct transfer_list_header *tl);
 entry_point_info_t *
 transfer_list_set_handoff_args(struct transfer_list_header *tl,
@@ -115,12 +116,12 @@
 		       struct transfer_list_entry *entry);
 
 struct transfer_list_entry *transfer_list_add(struct transfer_list_header *tl,
-					      uint16_t tag_id,
+					      uint32_t tag_id,
 					      uint32_t data_size,
 					      const void *data);
 
 struct transfer_list_entry *
-transfer_list_add_with_align(struct transfer_list_header *tl, uint16_t tag_id,
+transfer_list_add_with_align(struct transfer_list_header *tl, uint32_t tag_id,
 			     uint32_t data_size, const void *data,
 			     uint8_t alignment);
 
@@ -129,7 +130,7 @@
 		   struct transfer_list_entry *last);
 
 struct transfer_list_entry *transfer_list_find(struct transfer_list_header *tl,
-					       uint16_t tag_id);
+					       uint32_t tag_id);
 
 #endif /*__ASSEMBLER__*/
 #endif /*__TRANSFER_LIST_H*/
diff --git a/lib/el3_runtime/aarch64/context_mgmt.c b/lib/el3_runtime/aarch64/context_mgmt.c
index 39f3947..6929ff9 100644
--- a/lib/el3_runtime/aarch64/context_mgmt.c
+++ b/lib/el3_runtime/aarch64/context_mgmt.c
@@ -1278,7 +1278,7 @@
 	el2_sysregs_context_save_gic(el2_sysregs_ctx);
 
 	if (is_feat_mte2_supported()) {
-		write_el2_ctx_mte(el2_sysregs_ctx, tfsr_el2, read_tfsr_el2());
+		write_el2_ctx_mte2(el2_sysregs_ctx, tfsr_el2, read_tfsr_el2());
 	}
 
 #if CTX_INCLUDE_MPAM_REGS
@@ -1364,7 +1364,7 @@
 	el2_sysregs_context_restore_gic(el2_sysregs_ctx);
 
 	if (is_feat_mte2_supported()) {
-		write_tfsr_el2(read_el2_ctx_mte(el2_sysregs_ctx, tfsr_el2));
+		write_tfsr_el2(read_el2_ctx_mte2(el2_sysregs_ctx, tfsr_el2));
 	}
 
 #if CTX_INCLUDE_MPAM_REGS
diff --git a/lib/psci/psci_common.c b/lib/psci/psci_common.c
index 41c7919..bd7a452 100644
--- a/lib/psci/psci_common.c
+++ b/lib/psci/psci_common.c
@@ -172,7 +172,8 @@
  ******************************************************************************/
 static bool psci_is_last_cpu_to_idle_at_pwrlvl(unsigned int end_pwrlvl)
 {
-	unsigned int my_idx, lvl, parent_idx;
+	unsigned int my_idx, lvl;
+	unsigned int parent_idx = 0;
 	unsigned int cpu_start_idx, ncpus, cpu_idx;
 	plat_local_state_t local_state;
 
diff --git a/lib/transfer_list/transfer_list.c b/lib/transfer_list/transfer_list.c
index 63969e9..b7fedfa 100644
--- a/lib/transfer_list/transfer_list.c
+++ b/lib/transfer_list/transfer_list.c
@@ -366,7 +366,6 @@
 		/* create a dummy TE to fill up the gap */
 		dummy_te = (struct transfer_list_entry *)new_ev;
 		dummy_te->tag_id = TL_TAG_EMPTY;
-		dummy_te->reserved0 = 0;
 		dummy_te->hdr_size = sizeof(*dummy_te);
 		dummy_te->data_size = gap - sizeof(*dummy_te);
 	}
@@ -388,7 +387,6 @@
 		return false;
 	}
 	te->tag_id = TL_TAG_EMPTY;
-	te->reserved0 = 0;
 	transfer_list_update_checksum(tl);
 	return true;
 }
@@ -399,7 +397,7 @@
  * Return pointer to the added transfer entry or NULL on error
  ******************************************************************************/
 struct transfer_list_entry *transfer_list_add(struct transfer_list_header *tl,
-					      uint16_t tag_id,
+					      uint32_t tag_id,
 					      uint32_t data_size,
 					      const void *data)
 {
@@ -428,7 +426,6 @@
 
 	te = (struct transfer_list_entry *)tl_ev;
 	te->tag_id = tag_id;
-	te->reserved0 = 0;
 	te->hdr_size = sizeof(*te);
 	te->data_size = data_size;
 	tl->size += ev - tl_ev;
@@ -454,7 +451,7 @@
  * Return pointer to the added transfer entry or NULL on error
  ******************************************************************************/
 struct transfer_list_entry *
-transfer_list_add_with_align(struct transfer_list_header *tl, uint16_t tag_id,
+transfer_list_add_with_align(struct transfer_list_header *tl, uint32_t tag_id,
 			     uint32_t data_size, const void *data,
 			     uint8_t alignment)
 {
@@ -501,13 +498,13 @@
  * Return pointer to the found transfer entry or NULL on error
  ******************************************************************************/
 struct transfer_list_entry *transfer_list_find(struct transfer_list_header *tl,
-					       uint16_t tag_id)
+					       uint32_t tag_id)
 {
 	struct transfer_list_entry *te = NULL;
 
 	do {
 		te = transfer_list_next(tl, te);
-	} while (te && (te->tag_id != tag_id || te->reserved0 != 0));
+	} while (te && (te->tag_id != tag_id));
 
 	return te;
 }
diff --git a/make_helpers/build_macros.mk b/make_helpers/build_macros.mk
index a99d516..36ac126 100644
--- a/make_helpers/build_macros.mk
+++ b/make_helpers/build_macros.mk
@@ -10,11 +10,6 @@
     $(error This makefile only works with a Make program that supports $$(eval))
 endif
 
-# Some utility macros for manipulating awkward (whitespace) characters.
-blank			:=
-space			:=${blank} ${blank}
-comma			:= ,
-
 # A user defined function to recursively search for a filename below a directory
 #    $1 is the directory root of the recursive search (blank for current directory).
 #    $2 is the file name to search for.
diff --git a/make_helpers/toolchain.mk b/make_helpers/toolchain.mk
index 09f80db..2f47647 100644
--- a/make_helpers/toolchain.mk
+++ b/make_helpers/toolchain.mk
@@ -60,6 +60,8 @@
 endif
 
 include $(dir $(lastword $(MAKEFILE_LIST)))build_env.mk
+include $(dir $(lastword $(MAKEFILE_LIST)))utilities.mk
+
 include $(addprefix $(dir $(lastword $(MAKEFILE_LIST)))toolchains/, \
         $(addsuffix .mk,$(toolchains)))
 
@@ -222,27 +224,27 @@
 #
 
 # Arm Compiler for Embedded
-guess-tool-arm-clang = $(shell $(1) --version 2>&1 | grep -o "Tool: armclang")
-guess-tool-arm-link = $(shell $(1) --help 2>&1 | grep -o "Tool: armlink")
-guess-tool-arm-fromelf = $(shell $(1) --help 2>&1 | grep -o "Tool: fromelf")
-guess-tool-arm-ar = $(shell $(1) --version 2>&1 | grep -o "Tool: armar")
+guess-tool-arm-clang = $(shell $(call escape-shell,$(1)) --version 2>&1  <$(nul) | grep -o "Tool: armclang")
+guess-tool-arm-link = $(shell $(call escape-shell,$(1)) --help 2>&1  <$(nul) | grep -o "Tool: armlink")
+guess-tool-arm-fromelf = $(shell $(call escape-shell,$(1)) --help 2>&1  <$(nul) | grep -o "Tool: fromelf")
+guess-tool-arm-ar = $(shell $(call escape-shell,$(1)) --version 2>&1  <$(nul) | grep -o "Tool: armar")
 
 # LLVM Project
-guess-tool-llvm-clang = $(shell $(1) -v 2>&1 | grep -o "clang version")
-guess-tool-llvm-lld = $(shell $(1) --help 2>&1 | grep -o "OVERVIEW: lld")
-guess-tool-llvm-objcopy = $(shell $(1) --help 2>&1 | grep -o "llvm-objcopy tool")
-guess-tool-llvm-objdump = $(shell $(1) --help 2>&1 | grep -o "llvm object file dumper")
-guess-tool-llvm-ar = $(shell $(1) --help 2>&1 | grep -o "LLVM Archiver")
+guess-tool-llvm-clang = $(shell $(call escape-shell,$(1)) -v 2>&1  <$(nul) | grep -o "clang version")
+guess-tool-llvm-lld = $(shell $(call escape-shell,$(1)) --help 2>&1  <$(nul) | grep -o "OVERVIEW: lld")
+guess-tool-llvm-objcopy = $(shell $(call escape-shell,$(1)) --help 2>&1  <$(nul) | grep -o "llvm-objcopy tool")
+guess-tool-llvm-objdump = $(shell $(call escape-shell,$(1)) --help 2>&1  <$(nul) | grep -o "llvm object file dumper")
+guess-tool-llvm-ar = $(shell $(call escape-shell,$(1)) --help 2>&1  <$(nul) | grep -o "LLVM Archiver")
 
 # GNU Compiler Collection & GNU Binary Utilities
-guess-tool-gnu-gcc = $(shell $(1) -v 2>&1 | grep -o "gcc version")
-guess-tool-gnu-ld = $(shell $(1) -v 2>&1 | grep -o "GNU ld")
-guess-tool-gnu-objcopy = $(shell $(1) --version 2>&1 | grep -o "GNU objcopy")
-guess-tool-gnu-objdump = $(shell $(1) --version 2>&1 | grep -o "GNU objdump")
-guess-tool-gnu-ar = $(shell $(1) --version 2>&1 | grep -o "GNU ar")
+guess-tool-gnu-gcc = $(shell $(call escape-shell,$(1)) -v 2>&1  <$(nul) | grep -o "gcc version")
+guess-tool-gnu-ld = $(shell $(call escape-shell,$(1)) -v 2>&1  <$(nul) | grep -o "GNU ld")
+guess-tool-gnu-objcopy = $(shell $(call escape-shell,$(1)) --version 2>&1  <$(nul) | grep -o "GNU objcopy")
+guess-tool-gnu-objdump = $(shell $(call escape-shell,$(1)) --version 2>&1  <$(nul) | grep -o "GNU objdump")
+guess-tool-gnu-ar = $(shell $(call escape-shell,$(1)) --version 2>&1  <$(nul) | grep -o "GNU ar")
 
 # Other tools
-guess-tool-dtc = $(shell $(1) --version 2>&1 | grep -o "Version: DTC")
+guess-tool-dtc = $(shell $(call escape-shell,$(1)) --version 2>&1  <$(nul) | grep -o "Version: DTC")
 
 guess-tool = $(firstword $(foreach candidate,$(1), \
         $(if $(call guess-tool-$(candidate),$(2)),$(candidate))))
@@ -271,34 +273,32 @@
 # variable.
 #
 
-guess-arm-clang-cpp = $(1) # Use the C compiler
-guess-arm-clang-as = $(1) # Use the C compiler
+guess-arm-clang-cpp = $(1)
+guess-arm-clang-as = $(1)
 guess-arm-clang-ld = # Fall back to `$(toolchain)-ld-default`
 guess-arm-clang-oc = # Fall back to `$(toolchain)-oc-default`
 guess-arm-clang-od = # Fall back to `$(toolchain)-od-default`
 guess-arm-clang-ar = # Fall back to `$(toolchain)-ar-default`
 
-guess-llvm-clang-cpp = $(1) # Use the C compiler
-guess-llvm-clang-as = $(1) # Use the C compiler
-guess-llvm-clang-ld = $(shell $(1) --print-prog-name ld.lld 2>$(nul))
-guess-llvm-clang-oc = $(shell $(1) --print-prog-name llvm-objcopy 2>$(nul))
-guess-llvm-clang-od = $(shell $(1) --print-prog-name llvm-objdump 2>$(nul))
-guess-llvm-clang-ar = $(shell $(1) --print-prog-name llvm-ar 2>$(nul))
+guess-llvm-clang-cpp = $(1)
+guess-llvm-clang-as = $(1)
+guess-llvm-clang-ld = $(shell $(call escape-shell,$(1)) --print-prog-name ld.lld 2>$(nul))
+guess-llvm-clang-oc = $(shell $(call escape-shell,$(1)) --print-prog-name llvm-objcopy 2>$(nul))
+guess-llvm-clang-od = $(shell $(call escape-shell,$(1)) --print-prog-name llvm-objdump 2>$(nul))
+guess-llvm-clang-ar = $(shell $(call escape-shell,$(1)) --print-prog-name llvm-ar 2>$(nul))
 
-guess-gnu-gcc-cpp = $(1) # Use the C compiler
-guess-gnu-gcc-as = $(1) # Use the C compiler
-guess-gnu-gcc-ld = $(1) # Use the C compiler
-guess-gnu-gcc-oc = $(shell $(1) --print-prog-name objcopy 2>$(nul))
-guess-gnu-gcc-od = $(shell $(1) --print-prog-name objdump 2>$(nul))
-guess-gnu-gcc-ar = $(call which,$(patsubst %$(notdir $(1)),%$(subst gcc,gcc-ar,$(notdir $(1))),$(1)))
+guess-gnu-gcc-cpp = $(1)
+guess-gnu-gcc-as = $(1)
+guess-gnu-gcc-ld = $(1)
+guess-gnu-gcc-oc = $(shell $(call escape-shell,$(1)) --print-prog-name objcopy 2>$(nul))
+guess-gnu-gcc-od = $(shell $(call escape-shell,$(1)) --print-prog-name objdump 2>$(nul))
+guess-gnu-gcc-ar = $(call which,$(call decompat-path,$(patsubst %$(call file-name,$(1)),%$(subst gcc,gcc-ar,$(call file-name,$(1))),$(call compat-path,$(1)))))
 
 define locate-toolchain-tool-cc
         $(eval toolchain := $(1))
 
-        $(toolchain)-cc := $$(strip \
-                $$(or $$($(toolchain)-cc),$$($(toolchain)-cc-default)))
-        $(toolchain)-cc-id := $$(strip \
-                $$(call guess-tool,$$(tools-cc),$$($(toolchain)-cc)))
+        $(toolchain)-cc := $$(or $$($(toolchain)-cc),$$($(toolchain)-cc-default))
+        $(toolchain)-cc-id := $$(call guess-tool,$$(tools-cc),$$($(toolchain)-cc))
 endef
 
 define locate-toolchain-tool
@@ -306,26 +306,24 @@
         $(eval tool-class := $(2))
 
         ifndef $(toolchain)-$(tool-class)
-                $(toolchain)-$(tool-class) := $$(strip \
-                        $$(call guess-$$($(toolchain)-cc-id)-$(tool-class),$$($(toolchain)-cc)))
+                $(toolchain)-$(tool-class) := $$(call guess-$$($(toolchain)-cc-id)-$(tool-class),$$($(toolchain)-cc-path))
 
                 ifeq ($$($(toolchain)-$(tool-class)),)
-                        $(toolchain)-$(tool-class) := $$(strip \
-                                $$($(toolchain)-$(tool-class)-default))
+                        $(toolchain)-$(tool-class) := $$($(toolchain)-$(tool-class)-default)
                 endif
         endif
 
-        $(toolchain)-$(tool-class)-id := $$(strip \
-                $$(call guess-tool,$$(tools-$(tool-class)),$$($$(toolchain)-$(tool-class))))
+        $(toolchain)-$(tool-class)-id := $$(call guess-tool,$$(tools-$(tool-class)),$$($$(toolchain)-$(tool-class)))
 endef
 
 define canonicalize-toolchain-tool-path
         $(eval toolchain := $(1))
         $(eval tool-class := $(2))
 
-        $(toolchain)-$(tool-class) := $$(strip $$(or \
-                $$(call which,$$($(toolchain)-$(tool-class))), \
-                $$($(toolchain)-$(tool-class))))
+        $(toolchain)-$(tool-class)-path := $$(call absolute-path,$$(call which,$$($(toolchain)-$(tool-class))))
+        $(toolchain)-$(tool-class)-path := $$(or $$($(toolchain)-$(tool-class)-path),$$($(toolchain)-$(tool-class)))
+
+        $(toolchain)-$(tool-class) := $(call escape-shell,$$($(toolchain)-$(tool-class)-path))
 endef
 
 define locate-toolchain
diff --git a/make_helpers/unix.mk b/make_helpers/unix.mk
index d285799..93e1fcc 100644
--- a/make_helpers/unix.mk
+++ b/make_helpers/unix.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2016-2024, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -59,5 +59,5 @@
 
     nul := /dev/null
 
-    which = $(shell which $(1) 2>$(nul))
+    which = $(shell command -v $(call escape-shell,$(1)) 2>$(nul))
 endif
diff --git a/make_helpers/utilities.mk b/make_helpers/utilities.mk
new file mode 100644
index 0000000..62769fb
--- /dev/null
+++ b/make_helpers/utilities.mk
@@ -0,0 +1,22 @@
+#
+# Copyright (c) 2024, Arm Limited and Contributors. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+space :=
+space := $(space) $(space)
+comma := ,
+
+null := �
+
+compat-path = $(subst $(space),$(null),$(1))
+decompat-path = $(subst $(null), ,$(1))
+
+absolute-path = $(call decompat-path,$(abspath $(call compat-path,$(1))))
+real-path = $(call decompat-path,$(realpath $(call compat-path,$(1))))
+
+file-name = $(call decompat-path,$(notdir $(call compat-path,$(1))))
+directory-name = $(call decompat-path,$(dir $(call compat-path,$(1))))
+
+escape-shell = '$(subst ','\'',$(1))'
diff --git a/make_helpers/windows.mk b/make_helpers/windows.mk
index 7ed8e84..a75a740 100644
--- a/make_helpers/windows.mk
+++ b/make_helpers/windows.mk
@@ -70,7 +70,7 @@
 
     nul := nul
 
-    which = $(shell where $(1) 2>$(nul))
+    which = $(shell where "$(1)" 2>$(nul))
 endif
 
 # Because git is not available from CMD.EXE, we need to avoid
diff --git a/plat/arm/board/fvp/fdts/fvp_spmc_optee_sp_manifest.dts b/plat/arm/board/fvp/fdts/fvp_spmc_optee_sp_manifest.dts
index 17a2fd1..6fbfa42 100644
--- a/plat/arm/board/fvp/fdts/fvp_spmc_optee_sp_manifest.dts
+++ b/plat/arm/board/fvp/fdts/fvp_spmc_optee_sp_manifest.dts
@@ -15,7 +15,7 @@
 / {
 	compatible = "arm,ffa-core-manifest-1.0";
 	#address-cells = <2>;
-	#size-cells = <1>;
+	#size-cells = <2>;
 
 	attribute {
 		spmc_id = <0x8000>;
@@ -59,6 +59,12 @@
 
 	memory@6000000 {
 		device_type = "memory";
-		reg = <0x0 0x6000000 0x2000000>; /* Trusted DRAM */
+		reg = <0x0 0x6000000 0x0 0x2000000>; /* Trusted DRAM */
 	};
+
+	memory@1 {
+		device_type = "ns-memory";
+		reg = <0x00008800 0x80000000 0x0 0x7f000000>,
+			<0x0 0x88000000 0x0 0x10000000>;
+        };
 };