chore: simplify the macro names in ENABLE_FEAT mechanism

Currently, the macros used to denote feature implementation
in hardware follow a random pattern with a few macros having
suffix as SUPPORTED and a few using the suffix IMPLEMENTED.
This patch aligns the macro names uniformly using the suffix
IMPLEMENTED across all the features and removes unused macros
pertaining to the Enable feat mechanism.

FEAT_SUPPORTED --> FEAT_IMPLEMENTED
FEAT_NOT_SUPPORTED --> FEAT_NOT_IMPLEMENTED

Change-Id: I61bb7d154b23f677b80756a4b6a81f74b10cd24f
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
diff --git a/common/feat_detect.c b/common/feat_detect.c
index 7f01037..e6f827c 100644
--- a/common/feat_detect.c
+++ b/common/feat_detect.c
@@ -87,7 +87,7 @@
 {
 #if (ENABLE_RME == FEAT_STATE_ALWAYS)
 	feat_detect_panic((get_armv9_2_feat_rme_support() !=
-			ID_AA64PFR0_FEAT_RME_NOT_SUPPORTED), "RME");
+			RME_NOT_IMPLEMENTED), "RME");
 #endif
 }
 
@@ -129,9 +129,10 @@
 	tainted = false;
 
 	/* v8.0 features */
-	check_feature(ENABLE_FEAT_SB, read_feat_sb_id_field(), "SB", 1, 1);
+	check_feature(ENABLE_FEAT_SB, read_feat_sb_id_field(), "SB",
+			SB_IMPLEMENTED, SB_IMPLEMENTED);
 	check_feature(ENABLE_FEAT_CSV2_2, read_feat_csv2_id_field(),
-		      "CSV2_2", 2, 3);
+		      "CSV2_2", CSV2_2_IMPLEMENTED, CSV2_3_IMPLEMENTED);
 	/*
 	 * Even though the PMUv3 is an OPTIONAL feature, it is always
 	 * implemented and Arm prescribes so. So assume it will be there and do
@@ -142,25 +143,27 @@
 		      "PMUv3", 1, ID_AA64DFR0_PMUVER_PMUV3P7);
 
 	/* v8.1 features */
-	check_feature(ENABLE_FEAT_PAN, read_feat_pan_id_field(), "PAN", 1, 3);
+	check_feature(ENABLE_FEAT_PAN, read_feat_pan_id_field(), "PAN",
+			PAN_IMPLEMENTED, PAN3_IMPLEMENTED);
 	check_feature(ENABLE_FEAT_VHE, read_feat_vhe_id_field(), "VHE", 1, 1);
 
 	/* v8.2 features */
 	check_feature(ENABLE_SVE_FOR_NS, read_feat_sve_id_field(),
-		      "SVE", 1, 1);
+		      "SVE", SVE_IMPLEMENTED, SVE_IMPLEMENTED);
 	check_feature(ENABLE_FEAT_RAS, read_feat_ras_id_field(), "RAS", 1, 2);
 
 	/* v8.3 features */
 	read_feat_pauth();
 
 	/* v8.4 features */
-	check_feature(ENABLE_FEAT_DIT, read_feat_dit_id_field(), "DIT", 1, 1);
+	check_feature(ENABLE_FEAT_DIT, read_feat_dit_id_field(), "DIT",
+			DIT_IMPLEMENTED, DIT_IMPLEMENTED);
 	check_feature(ENABLE_FEAT_AMU, read_feat_amu_id_field(),
 		      "AMUv1", 1, 2);
 	check_feature(ENABLE_FEAT_MPAM, read_feat_mpam_version(),
 		      "MPAM", 1, 17);
 	check_feature(CTX_INCLUDE_NEVE_REGS, read_feat_nv_id_field(),
-		      "NV2", 2, 2);
+		      "NV2", NV2_IMPLEMENTED, NV2_IMPLEMENTED);
 	check_feature(ENABLE_FEAT_SEL2, read_feat_sel2_id_field(),
 		      "SEL2", 1, 1);
 	check_feature(ENABLE_TRF_FOR_NS, read_feat_trf_id_field(),
@@ -177,19 +180,22 @@
 	check_feature(ENABLE_FEAT_AMUv1p1, read_feat_amu_id_field(),
 		      "AMUv1p1", 2, 2);
 	check_feature(ENABLE_FEAT_FGT, read_feat_fgt_id_field(), "FGT", 1, 1);
-	check_feature(ENABLE_FEAT_ECV, read_feat_ecv_id_field(), "ECV", 1, 2);
+	check_feature(ENABLE_FEAT_ECV, read_feat_ecv_id_field(), "ECV",
+			ECV_IMPLEMENTED, 2);
 	check_feature(ENABLE_FEAT_TWED, read_feat_twed_id_field(),
-		      "TWED", 1, 1);
+		      "TWED", TWED_IMPLEMENTED, TWED_IMPLEMENTED);
 
 	/*
 	 * even though this is a "DISABLE" it does confusingly perform feature
 	 * enablement duties like all other flags here. Check it against the HW
 	 * feature when we intend to diverge from the default behaviour
 	 */
-	check_feature(DISABLE_MTPMU, read_feat_mtpmu_id_field(), "MTPMU", 1, 1);
+	check_feature(DISABLE_MTPMU, read_feat_mtpmu_id_field(), "MTPMU",
+			MTPMU_IMPLEMENTED, MTPMU_IMPLEMENTED);
 
 	/* v8.7 features */
-	check_feature(ENABLE_FEAT_HCX, read_feat_hcx_id_field(), "HCX", 1, 1);
+	check_feature(ENABLE_FEAT_HCX, read_feat_hcx_id_field(), "HCX",
+			HCX_IMPLEMENTED, HCX_IMPLEMENTED);
 
 	/* v8.9 features */
 	check_feature(ENABLE_FEAT_TCR2, read_feat_tcr2_id_field(),
@@ -207,15 +213,15 @@
 
 	/* v9.0 features */
 	check_feature(ENABLE_BRBE_FOR_NS, read_feat_brbe_id_field(),
-		      "BRBE", 1, 2);
+		      "BRBE", BRBE_IMPLEMENTED, 2);
 	check_feature(ENABLE_TRBE_FOR_NS, read_feat_trbe_id_field(),
 		      "TRBE", 1, 1);
 
 	/* v9.2 features */
 	check_feature(ENABLE_SME_FOR_NS, read_feat_sme_id_field(),
-		      "SME", 1, 2);
+		      "SME", SME_IMPLEMENTED, SME2_IMPLEMENTED);
 	check_feature(ENABLE_SME2_FOR_NS, read_feat_sme_id_field(),
-		      "SME2", 2, 2);
+		      "SME2", SME2_IMPLEMENTED, SME2_IMPLEMENTED);
 
 	/* v9.4 features */
 	check_feature(ENABLE_FEAT_GCS, read_feat_gcs_id_field(), "GCS", 1, 1);
diff --git a/include/arch/aarch32/arch.h b/include/arch/aarch32/arch.h
index 7e759d81..73b2d76 100644
--- a/include/arch/aarch32/arch.h
+++ b/include/arch/aarch32/arch.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2023, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2024, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -111,18 +111,18 @@
 #define ID_DFR0_PERFMON_PMUV3P5		U(6)
 #define ID_DFR0_COPTRC_SHIFT		U(12)
 #define ID_DFR0_COPTRC_MASK		U(0xf)
-#define ID_DFR0_COPTRC_SUPPORTED	U(1)
+#define COPTRC_IMPLEMENTED		U(1)
 #define ID_DFR0_COPTRC_LENGTH		U(4)
 #define ID_DFR0_TRACEFILT_SHIFT		U(28)
 #define ID_DFR0_TRACEFILT_MASK		U(0xf)
-#define ID_DFR0_TRACEFILT_SUPPORTED	U(1)
+#define TRACEFILT_IMPLEMENTED		U(1)
 #define ID_DFR0_TRACEFILT_LENGTH	U(4)
 
 /* ID_DFR1_EL1 definitions */
 #define ID_DFR1_MTPMU_SHIFT	U(0)
 #define ID_DFR1_MTPMU_MASK	U(0xf)
-#define ID_DFR1_MTPMU_SUPPORTED	U(1)
-#define ID_DFR1_MTPMU_DISABLED	U(15)
+#define MTPMU_IMPLEMENTED	U(1)
+#define MTPMU_NOT_IMPLEMENTED	U(15)
 
 /* ID_MMFR3 definitions */
 #define ID_MMFR3_PAN_SHIFT	U(16)
@@ -141,14 +141,13 @@
 #define ID_PFR0_AMU_SHIFT	U(20)
 #define ID_PFR0_AMU_LENGTH	U(4)
 #define ID_PFR0_AMU_MASK	U(0xf)
-#define ID_PFR0_AMU_NOT_SUPPORTED	U(0x0)
 #define ID_PFR0_AMU_V1		U(0x1)
 #define ID_PFR0_AMU_V1P1	U(0x2)
 
 #define ID_PFR0_DIT_SHIFT	U(24)
 #define ID_PFR0_DIT_LENGTH	U(4)
 #define ID_PFR0_DIT_MASK	U(0xf)
-#define ID_PFR0_DIT_SUPPORTED	(U(1) << ID_PFR0_DIT_SHIFT)
+#define DIT_IMPLEMENTED		(U(1) << ID_PFR0_DIT_SHIFT)
 
 /* ID_PFR1 definitions */
 #define ID_PFR1_VIRTEXT_SHIFT	U(12)
@@ -166,7 +165,7 @@
 /* ID_PFR2 definitions */
 #define ID_PFR2_SSBS_SHIFT	U(4)
 #define ID_PFR2_SSBS_MASK	U(0xf)
-#define SSBS_UNAVAILABLE	U(0)
+#define SSBS_NOT_IMPLEMENTED	U(0)
 
 /* SCTLR definitions */
 #define SCTLR_RES1_DEF		((U(1) << 23) | (U(1) << 22) | (U(1) << 4) | \
diff --git a/include/arch/aarch32/arch_features.h b/include/arch/aarch32/arch_features.h
index b52e4d0..c79efc4 100644
--- a/include/arch/aarch32/arch_features.h
+++ b/include/arch/aarch32/arch_features.h
@@ -136,7 +136,7 @@
 static inline unsigned int is_feat_ssbs_present(void)
 {
 	return ((read_id_pfr2() >> ID_PFR2_SSBS_SHIFT) &
-		ID_PFR2_SSBS_MASK) != SSBS_UNAVAILABLE;
+		ID_PFR2_SSBS_MASK) != SSBS_NOT_IMPLEMENTED;
 }
 
 /*
@@ -201,7 +201,7 @@
 
 	unsigned int mtpmu = read_feat_mtpmu_id_field();
 
-	return mtpmu != 0U && mtpmu != ID_DFR1_MTPMU_DISABLED;
+	return ((mtpmu != 0U) && (mtpmu != MTPMU_NOT_IMPLEMENTED));
 }
 
 #endif /* ARCH_FEATURES_H */
diff --git a/include/arch/aarch32/el3_common_macros.S b/include/arch/aarch32/el3_common_macros.S
index 697eb82..41eeabb 100644
--- a/include/arch/aarch32/el3_common_macros.S
+++ b/include/arch/aarch32/el3_common_macros.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2023, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2024, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -76,7 +76,7 @@
 	orr	r0, r0, #(NSACR_RESET_VAL | NSACR_ENABLE_FP_ACCESS)
 	ldcopr	r1, ID_DFR0
 	ubfx	r1, r1, #ID_DFR0_COPTRC_SHIFT, #ID_DFR0_COPTRC_LENGTH
-	cmp	r1, #ID_DFR0_COPTRC_SUPPORTED
+	cmp	r1, #COPTRC_IMPLEMENTED
 	bne	1f
 	orr	r0, r0, #NSTRCDIS_BIT
 1:
@@ -143,7 +143,7 @@
 		      SDCR_SCCD_BIT) & ~SDCR_TTRF_BIT)
 	ldcopr	r1, ID_DFR0
 	ubfx	r1, r1, #ID_DFR0_TRACEFILT_SHIFT, #ID_DFR0_TRACEFILT_LENGTH
-	cmp	r1, #ID_DFR0_TRACEFILT_SUPPORTED
+	cmp	r1, #TRACEFILT_IMPLEMENTED
 	bne	1f
 	orr	r0, r0, #SDCR_TTRF_BIT
 1:
@@ -182,7 +182,7 @@
 	 */
 	ldcopr	r0, ID_PFR0
 	and	r0, r0, #(ID_PFR0_DIT_MASK << ID_PFR0_DIT_SHIFT)
-	cmp	r0, #ID_PFR0_DIT_SUPPORTED
+	cmp	r0, #DIT_IMPLEMENTED
 	bne	1f
 	mrs	r0, cpsr
 	orr	r0, r0, #CPSR_DIT_BIT
diff --git a/include/arch/aarch64/arch.h b/include/arch/aarch64/arch.h
index 5508ebb..ea9aa51 100644
--- a/include/arch/aarch64/arch.h
+++ b/include/arch/aarch64/arch.h
@@ -179,7 +179,6 @@
 
 #define ID_AA64PFR0_AMU_SHIFT			U(44)
 #define ID_AA64PFR0_AMU_MASK			ULL(0xf)
-#define ID_AA64PFR0_AMU_NOT_SUPPORTED		U(0x0)
 #define ID_AA64PFR0_AMU_V1			ULL(0x1)
 #define ID_AA64PFR0_AMU_V1P1			U(0x2)
 
@@ -191,8 +190,8 @@
 
 #define ID_AA64PFR0_SVE_SHIFT			U(32)
 #define ID_AA64PFR0_SVE_MASK			ULL(0xf)
-#define ID_AA64PFR0_SVE_SUPPORTED		ULL(0x1)
 #define ID_AA64PFR0_SVE_LENGTH			U(4)
+#define SVE_IMPLEMENTED				ULL(0x1)
 
 #define ID_AA64PFR0_SEL2_SHIFT			U(36)
 #define ID_AA64PFR0_SEL2_MASK			ULL(0xf)
@@ -203,23 +202,21 @@
 #define ID_AA64PFR0_DIT_SHIFT			U(48)
 #define ID_AA64PFR0_DIT_MASK			ULL(0xf)
 #define ID_AA64PFR0_DIT_LENGTH			U(4)
-#define ID_AA64PFR0_DIT_SUPPORTED		U(1)
+#define DIT_IMPLEMENTED				ULL(1)
 
 #define ID_AA64PFR0_CSV2_SHIFT			U(56)
 #define ID_AA64PFR0_CSV2_MASK			ULL(0xf)
 #define ID_AA64PFR0_CSV2_LENGTH			U(4)
-#define ID_AA64PFR0_CSV2_2_SUPPORTED		ULL(0x2)
-#define ID_AA64PFR0_CSV2_3_SUPPORTED		ULL(0x3)
+#define CSV2_2_IMPLEMENTED			ULL(0x2)
+#define CSV2_3_IMPLEMENTED			ULL(0x3)
 
 #define ID_AA64PFR0_FEAT_RME_SHIFT		U(52)
 #define ID_AA64PFR0_FEAT_RME_MASK		ULL(0xf)
 #define ID_AA64PFR0_FEAT_RME_LENGTH		U(4)
-#define ID_AA64PFR0_FEAT_RME_NOT_SUPPORTED	U(0)
-#define ID_AA64PFR0_FEAT_RME_V1			U(1)
+#define RME_NOT_IMPLEMENTED			ULL(0)
 
 #define ID_AA64PFR0_RAS_SHIFT			U(28)
 #define ID_AA64PFR0_RAS_MASK			ULL(0xf)
-#define ID_AA64PFR0_RAS_NOT_SUPPORTED		ULL(0x0)
 #define ID_AA64PFR0_RAS_LENGTH			U(4)
 
 /* Exception level handling */
@@ -230,12 +227,13 @@
 /* ID_AA64DFR0_EL1.TraceVer definitions */
 #define ID_AA64DFR0_TRACEVER_SHIFT	U(4)
 #define ID_AA64DFR0_TRACEVER_MASK	ULL(0xf)
-#define ID_AA64DFR0_TRACEVER_SUPPORTED	ULL(1)
 #define ID_AA64DFR0_TRACEVER_LENGTH	U(4)
+
 #define ID_AA64DFR0_TRACEFILT_SHIFT	U(40)
 #define ID_AA64DFR0_TRACEFILT_MASK	U(0xf)
-#define ID_AA64DFR0_TRACEFILT_SUPPORTED	U(1)
 #define ID_AA64DFR0_TRACEFILT_LENGTH	U(4)
+#define TRACEFILT_IMPLEMENTED		ULL(1)
+
 #define ID_AA64DFR0_PMUVER_LENGTH	U(4)
 #define ID_AA64DFR0_PMUVER_SHIFT	U(8)
 #define ID_AA64DFR0_PMUVER_MASK		U(0xf)
@@ -251,24 +249,24 @@
 /* ID_AA64DFR0_EL1.PMS definitions (for ARMv8.2+) */
 #define ID_AA64DFR0_PMS_SHIFT		U(32)
 #define ID_AA64DFR0_PMS_MASK		ULL(0xf)
-#define ID_AA64DFR0_SPE_SUPPORTED	ULL(0x1)
-#define ID_AA64DFR0_SPE_NOT_SUPPORTED   ULL(0x0)
+#define SPE_IMPLEMENTED			ULL(0x1)
+#define SPE_NOT_IMPLEMENTED		ULL(0x0)
 
 /* ID_AA64DFR0_EL1.TraceBuffer definitions */
 #define ID_AA64DFR0_TRACEBUFFER_SHIFT		U(44)
 #define ID_AA64DFR0_TRACEBUFFER_MASK		ULL(0xf)
-#define ID_AA64DFR0_TRACEBUFFER_SUPPORTED	ULL(1)
+#define TRACEBUFFER_IMPLEMENTED			ULL(1)
 
 /* ID_AA64DFR0_EL1.MTPMU definitions (for ARMv8.6+) */
 #define ID_AA64DFR0_MTPMU_SHIFT		U(48)
 #define ID_AA64DFR0_MTPMU_MASK		ULL(0xf)
-#define ID_AA64DFR0_MTPMU_SUPPORTED	ULL(1)
-#define ID_AA64DFR0_MTPMU_DISABLED	ULL(15)
+#define MTPMU_IMPLEMENTED		ULL(1)
+#define MTPMU_NOT_IMPLEMENTED		ULL(15)
 
 /* ID_AA64DFR0_EL1.BRBE definitions */
 #define ID_AA64DFR0_BRBE_SHIFT		U(52)
 #define ID_AA64DFR0_BRBE_MASK		ULL(0xf)
-#define ID_AA64DFR0_BRBE_SUPPORTED	ULL(1)
+#define BRBE_IMPLEMENTED		ULL(1)
 
 /* ID_AA64DFR1_EL1 definitions */
 #define ID_AA64DFR1_EBEP_SHIFT		U(48)
@@ -294,8 +292,8 @@
 
 #define ID_AA64ISAR1_SB_SHIFT		U(36)
 #define ID_AA64ISAR1_SB_MASK		ULL(0xf)
-#define ID_AA64ISAR1_SB_SUPPORTED	ULL(0x1)
-#define ID_AA64ISAR1_SB_NOT_SUPPORTED	ULL(0x0)
+#define SB_IMPLEMENTED			ULL(0x1)
+#define SB_NOT_IMPLEMENTED		ULL(0x0)
 
 /* ID_AA64ISAR2_EL1 definitions */
 #define ID_AA64ISAR2_EL1		S3_0_C0_C6_2
@@ -323,52 +321,41 @@
 
 #define ID_AA64MMFR0_EL1_ECV_SHIFT		U(60)
 #define ID_AA64MMFR0_EL1_ECV_MASK		ULL(0xf)
-#define ID_AA64MMFR0_EL1_ECV_NOT_SUPPORTED	ULL(0x0)
-#define ID_AA64MMFR0_EL1_ECV_SUPPORTED		ULL(0x1)
-#define ID_AA64MMFR0_EL1_ECV_SELF_SYNCH	ULL(0x2)
+#define ID_AA64MMFR0_EL1_ECV_SELF_SYNCH		ULL(0x2)
+#define ECV_IMPLEMENTED				ULL(0x1)
 
 #define ID_AA64MMFR0_EL1_FGT_SHIFT		U(56)
 #define ID_AA64MMFR0_EL1_FGT_MASK		ULL(0xf)
-#define ID_AA64MMFR0_EL1_FGT_SUPPORTED		ULL(0x1)
-#define ID_AA64MMFR0_EL1_FGT_NOT_SUPPORTED	ULL(0x0)
+#define FGT_IMPLEMENTED				ULL(0x1)
+#define FGT_NOT_IMPLEMENTED			ULL(0x0)
 
 #define ID_AA64MMFR0_EL1_TGRAN4_SHIFT		U(28)
 #define ID_AA64MMFR0_EL1_TGRAN4_MASK		ULL(0xf)
-#define ID_AA64MMFR0_EL1_TGRAN4_SUPPORTED	ULL(0x0)
-#define ID_AA64MMFR0_EL1_TGRAN4_52B_SUPPORTED	ULL(0x1)
-#define ID_AA64MMFR0_EL1_TGRAN4_NOT_SUPPORTED	ULL(0xf)
 
 #define ID_AA64MMFR0_EL1_TGRAN64_SHIFT		U(24)
 #define ID_AA64MMFR0_EL1_TGRAN64_MASK		ULL(0xf)
-#define ID_AA64MMFR0_EL1_TGRAN64_SUPPORTED	ULL(0x0)
-#define ID_AA64MMFR0_EL1_TGRAN64_NOT_SUPPORTED	ULL(0xf)
 
 #define ID_AA64MMFR0_EL1_TGRAN16_SHIFT		U(20)
 #define ID_AA64MMFR0_EL1_TGRAN16_MASK		ULL(0xf)
-#define ID_AA64MMFR0_EL1_TGRAN16_SUPPORTED	ULL(0x1)
-#define ID_AA64MMFR0_EL1_TGRAN16_NOT_SUPPORTED	ULL(0x0)
-#define ID_AA64MMFR0_EL1_TGRAN16_52B_SUPPORTED	ULL(0x2)
+#define TGRAN16_IMPLEMENTED			ULL(0x1)
 
 /* ID_AA64MMFR1_EL1 definitions */
 #define ID_AA64MMFR1_EL1_TWED_SHIFT		U(32)
 #define ID_AA64MMFR1_EL1_TWED_MASK		ULL(0xf)
-#define ID_AA64MMFR1_EL1_TWED_SUPPORTED		ULL(0x1)
-#define ID_AA64MMFR1_EL1_TWED_NOT_SUPPORTED	ULL(0x0)
+#define TWED_IMPLEMENTED			ULL(0x1)
 
 #define ID_AA64MMFR1_EL1_PAN_SHIFT		U(20)
 #define ID_AA64MMFR1_EL1_PAN_MASK		ULL(0xf)
-#define ID_AA64MMFR1_EL1_PAN_NOT_SUPPORTED	ULL(0x0)
-#define ID_AA64MMFR1_EL1_PAN_SUPPORTED		ULL(0x1)
-#define ID_AA64MMFR1_EL1_PAN2_SUPPORTED		ULL(0x2)
-#define ID_AA64MMFR1_EL1_PAN3_SUPPORTED		ULL(0x3)
+#define PAN_IMPLEMENTED				ULL(0x1)
+#define PAN2_IMPLEMENTED			ULL(0x2)
+#define PAN3_IMPLEMENTED			ULL(0x3)
 
 #define ID_AA64MMFR1_EL1_VHE_SHIFT		U(8)
 #define ID_AA64MMFR1_EL1_VHE_MASK		ULL(0xf)
 
 #define ID_AA64MMFR1_EL1_HCX_SHIFT		U(40)
 #define ID_AA64MMFR1_EL1_HCX_MASK		ULL(0xf)
-#define ID_AA64MMFR1_EL1_HCX_SUPPORTED		ULL(0x1)
-#define ID_AA64MMFR1_EL1_HCX_NOT_SUPPORTED	ULL(0x0)
+#define HCX_IMPLEMENTED				ULL(0x1)
 
 /* ID_AA64MMFR2_EL1 definitions */
 #define ID_AA64MMFR2_EL1			S3_0_C0_C7_2
@@ -388,9 +375,7 @@
 
 #define ID_AA64MMFR2_EL1_NV_SHIFT		U(24)
 #define ID_AA64MMFR2_EL1_NV_MASK		ULL(0xf)
-#define ID_AA64MMFR2_EL1_NV_NOT_SUPPORTED	ULL(0x0)
-#define ID_AA64MMFR2_EL1_NV_SUPPORTED		ULL(0x1)
-#define ID_AA64MMFR2_EL1_NV2_SUPPORTED		ULL(0x2)
+#define NV2_IMPLEMENTED				ULL(0x2)
 
 /* ID_AA64MMFR3_EL1 definitions */
 #define ID_AA64MMFR3_EL1			S3_0_C0_C7_3
@@ -414,11 +399,11 @@
 
 #define ID_AA64PFR1_EL1_BT_SHIFT	U(0)
 #define ID_AA64PFR1_EL1_BT_MASK		ULL(0xf)
-#define BTI_IMPLEMENTED		ULL(1)	/* The BTI mechanism is implemented */
+#define BTI_IMPLEMENTED			ULL(1)	/* The BTI mechanism is implemented */
 
 #define ID_AA64PFR1_EL1_SSBS_SHIFT	U(4)
 #define ID_AA64PFR1_EL1_SSBS_MASK	ULL(0xf)
-#define SSBS_UNAVAILABLE	ULL(0)	/* No architectural SSBS support */
+#define SSBS_NOT_IMPLEMENTED		ULL(0)	/* No architectural SSBS support */
 
 #define ID_AA64PFR1_EL1_MTE_SHIFT	U(8)
 #define ID_AA64PFR1_EL1_MTE_MASK	ULL(0xf)
@@ -434,8 +419,7 @@
 #define ID_AA64PFR1_EL1_GCS_MASK	ULL(0xf)
 #define GCS_IMPLEMENTED			ULL(1)
 
-#define ID_AA64PFR1_EL1_RNG_TRAP_SUPPORTED	ULL(0x1)
-#define ID_AA64PFR1_EL1_RNG_TRAP_NOT_SUPPORTED	ULL(0x0)
+#define RNG_TRAP_IMPLEMENTED		ULL(0x1)
 
 /* ID_AA64PFR2_EL1 definitions */
 #define ID_AA64PFR2_EL1_MTEPERM_SHIFT		U(0)
@@ -468,9 +452,9 @@
 #define ID_AA64PFR1_EL1_SME_SHIFT		U(24)
 #define ID_AA64PFR1_EL1_SME_MASK		ULL(0xf)
 #define ID_AA64PFR1_EL1_SME_WIDTH		U(4)
-#define ID_AA64PFR1_EL1_SME_NOT_SUPPORTED	ULL(0x0)
-#define ID_AA64PFR1_EL1_SME_SUPPORTED		ULL(0x1)
-#define ID_AA64PFR1_EL1_SME2_SUPPORTED		ULL(0x2)
+#define SME_IMPLEMENTED				ULL(0x1)
+#define SME2_IMPLEMENTED			ULL(0x2)
+#define SME_NOT_IMPLEMENTED			ULL(0x0)
 
 /* ID_PFR1_EL1 definitions */
 #define ID_PFR1_VIRTEXT_SHIFT	U(12)
@@ -1102,11 +1086,11 @@
 /* ID_AA64SMFR0_EL1 definitions */
 #define ID_AA64SMFR0_EL1_SME_FA64_SHIFT		U(63)
 #define ID_AA64SMFR0_EL1_SME_FA64_MASK		U(0x1)
-#define ID_AA64SMFR0_EL1_SME_FA64_SUPPORTED	U(0x1)
+#define SME_FA64_IMPLEMENTED			U(0x1)
 #define ID_AA64SMFR0_EL1_SME_VER_SHIFT		U(55)
 #define ID_AA64SMFR0_EL1_SME_VER_MASK		ULL(0xf)
-#define ID_AA64SMFR0_EL1_SME_INST_SUPPORTED	ULL(0x0)
-#define ID_AA64SMFR0_EL1_SME2_INST_SUPPORTED	ULL(0x1)
+#define SME_INST_IMPLEMENTED			ULL(0x0)
+#define SME2_INST_IMPLEMENTED			ULL(0x1)
 
 /* SMCR_ELx definitions */
 #define SMCR_ELX_LEN_SHIFT		U(0)
diff --git a/include/arch/aarch64/arch_features.h b/include/arch/aarch64/arch_features.h
index 7582fc6..7b556ca 100644
--- a/include/arch/aarch64/arch_features.h
+++ b/include/arch/aarch64/arch_features.h
@@ -113,7 +113,7 @@
 static inline bool is_feat_ssbs_present(void)
 {
 	return ((read_id_aa64pfr1_el1() >> ID_AA64PFR1_EL1_SSBS_SHIFT) &
-		ID_AA64PFR1_EL1_SSBS_MASK) != SSBS_UNAVAILABLE;
+		ID_AA64PFR1_EL1_SSBS_MASK) != SSBS_NOT_IMPLEMENTED;
 }
 
 static inline bool is_feat_nmi_present(void)
@@ -214,7 +214,7 @@
 {
 	return (((read_id_aa64pfr1_el1() >> ID_AA64PFR1_EL1_RNDR_TRAP_SHIFT) &
 			ID_AA64PFR1_EL1_RNDR_TRAP_MASK)
-			== ID_AA64PFR1_EL1_RNG_TRAP_SUPPORTED);
+			== RNG_TRAP_IMPLEMENTED);
 }
 
 static inline unsigned int get_armv9_2_feat_rme_support(void)
@@ -255,9 +255,9 @@
 }
 
 CREATE_FEATURE_FUNCS_VER(feat_csv2_2, read_feat_csv2_id_field,
-			 ID_AA64PFR0_CSV2_2_SUPPORTED, ENABLE_FEAT_CSV2_2)
+			 CSV2_2_IMPLEMENTED, ENABLE_FEAT_CSV2_2)
 CREATE_FEATURE_FUNCS_VER(feat_csv2_3, read_feat_csv2_id_field,
-			 ID_AA64PFR0_CSV2_3_SUPPORTED, ENABLE_FEAT_CSV2_3)
+			 CSV2_3_IMPLEMENTED, ENABLE_FEAT_CSV2_3)
 
 /* FEAT_SPE: Statistical Profiling Extension */
 CREATE_FEATURE_FUNCS(feat_spe, id_aa64dfr0_el1, ID_AA64DFR0_PMS_SHIFT,
@@ -285,7 +285,7 @@
 /* FEAT_NV2: Enhanced Nested Virtualization */
 CREATE_FEATURE_FUNCS(feat_nv, id_aa64mmfr2_el1, ID_AA64MMFR2_EL1_NV_SHIFT, 0)
 CREATE_FEATURE_FUNCS_VER(feat_nv2, read_feat_nv_id_field,
-			 ID_AA64MMFR2_EL1_NV2_SUPPORTED, CTX_INCLUDE_NEVE_REGS)
+			 NV2_IMPLEMENTED, CTX_INCLUDE_NEVE_REGS)
 
 /* FEAT_BRBE: Branch Record Buffer Extension */
 CREATE_FEATURE_FUNCS(feat_brbe, id_aa64dfr0_el1, ID_AA64DFR0_BRBE_SHIFT,
@@ -304,7 +304,7 @@
 CREATE_FEATURE_FUNCS(feat_sme, id_aa64pfr1_el1, ID_AA64PFR1_EL1_SME_SHIFT,
 		     ENABLE_SME_FOR_NS)
 CREATE_FEATURE_FUNCS_VER(feat_sme2, read_feat_sme_id_field,
-			 ID_AA64PFR1_EL1_SME2_SUPPORTED, ENABLE_SME2_FOR_NS)
+			 SME2_IMPLEMENTED, ENABLE_SME2_FOR_NS)
 
 /*******************************************************************************
  * Function to get hardware granularity support
@@ -350,7 +350,7 @@
 
 	unsigned int mtpmu = read_feat_mtpmu_id_field();
 
-	return (mtpmu != 0U) && (mtpmu != ID_AA64DFR0_MTPMU_DISABLED);
+	return (mtpmu != 0U) && (mtpmu != MTPMU_NOT_IMPLEMENTED);
 }
 
 #endif /* ARCH_FEATURES_H */
diff --git a/include/arch/aarch64/el2_common_macros.S b/include/arch/aarch64/el2_common_macros.S
index 9609c0d..9f82399 100644
--- a/include/arch/aarch64/el2_common_macros.S
+++ b/include/arch/aarch64/el2_common_macros.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021-2023, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2021-2024, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -157,7 +157,7 @@
 	 */
 	mrs	x0, id_aa64pfr0_el1
 	ubfx	x0, x0, #ID_AA64PFR0_DIT_SHIFT, #ID_AA64PFR0_DIT_LENGTH
-	cmp	x0, #ID_AA64PFR0_DIT_SUPPORTED
+	cmp	x0, #DIT_IMPLEMENTED
 	bne	1f
 	mov	x0, #DIT_BIT
 	msr	DIT, x0
diff --git a/include/arch/aarch64/el3_common_macros.S b/include/arch/aarch64/el3_common_macros.S
index 26c7578..1a3e9b6 100644
--- a/include/arch/aarch64/el3_common_macros.S
+++ b/include/arch/aarch64/el3_common_macros.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2023, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2024, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -133,7 +133,7 @@
 #if ENABLE_FEAT_DIT > 1
 	cbz	x0, 1f
 #else
-	cmp	x0, #ID_AA64PFR0_DIT_SUPPORTED
+	cmp	x0, #DIT_IMPLEMENTED
 	ASM_ASSERT(eq)
 #endif
 
diff --git a/lib/cpus/aarch64/cortex_gelas.S b/lib/cpus/aarch64/cortex_gelas.S
index dc704f2..8870019 100644
--- a/lib/cpus/aarch64/cortex_gelas.S
+++ b/lib/cpus/aarch64/cortex_gelas.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, Arm Limited. All rights reserved.
+ * Copyright (c) 2023-2024, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -42,7 +42,7 @@
 	mrs     x0, ID_AA64PFR1_EL1
 	ubfx	x0, x0, #ID_AA64PFR1_EL1_SME_SHIFT, \
 		#ID_AA64PFR1_EL1_SME_WIDTH
-        cmp     x0, #ID_AA64PFR1_EL1_SME_NOT_SUPPORTED
+        cmp     x0, #SME_NOT_IMPLEMENTED
 	b.eq	1f
 	msr	CORTEX_GELAS_SVCRSM, xzr
 	msr	CORTEX_GELAS_SVCRZA, xzr
diff --git a/lib/cpus/aarch64/travis.S b/lib/cpus/aarch64/travis.S
index 2abefe9..ba06f55 100644
--- a/lib/cpus/aarch64/travis.S
+++ b/lib/cpus/aarch64/travis.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, Arm Limited. All rights reserved.
+ * Copyright (c) 2023-2024, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -38,7 +38,7 @@
 	mrs     x0, ID_AA64PFR1_EL1
 	ubfx	x0, x0, #ID_AA64PFR1_EL1_SME_SHIFT, \
 		#ID_AA64PFR1_EL1_SME_WIDTH
-        cmp     x0, #ID_AA64PFR1_EL1_SME_NOT_SUPPORTED
+        cmp     x0, #SME_NOT_IMPLEMENTED
 	b.eq	1f
 	msr	TRAVIS_SVCRSM, xzr
 	msr	TRAVIS_SVCRZA, xzr
diff --git a/lib/xlat_tables_v2/aarch64/xlat_tables_arch.c b/lib/xlat_tables_v2/aarch64/xlat_tables_arch.c
index bb6a35c..60752b5 100644
--- a/lib/xlat_tables_v2/aarch64/xlat_tables_arch.c
+++ b/lib/xlat_tables_v2/aarch64/xlat_tables_arch.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2023, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2024, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -30,7 +30,7 @@
 		return (tgranx < 8U);
 	} else if (size == PAGE_SIZE_16KB) {
 		tgranx = read_id_aa64mmfr0_el0_tgran16_field();
-		return (tgranx >= ID_AA64MMFR0_EL1_TGRAN16_SUPPORTED);
+		return (tgranx >= TGRAN16_IMPLEMENTED);
 	} else if (size == PAGE_SIZE_64KB) {
 		tgranx = read_id_aa64mmfr0_el0_tgran64_field();
 		/* MSB of TGRAN64 field will be '1' for unsupported feature */
diff --git a/services/arm_arch_svc/arm_arch_svc_setup.c b/services/arm_arch_svc/arm_arch_svc_setup.c
index 57d211e..5456164 100644
--- a/services/arm_arch_svc/arm_arch_svc_setup.c
+++ b/services/arm_arch_svc/arm_arch_svc_setup.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2023, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2024, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -54,7 +54,7 @@
 		 * If architectural SSBS is available on this PE, no firmware
 		 * mitigation via SMCCC_ARCH_WORKAROUND_2 is required.
 		 */
-		if (ssbs != SSBS_UNAVAILABLE)
+		if (ssbs != SSBS_NOT_IMPLEMENTED)
 			return 1;
 
 		/*