1# 2# Copyright (c) 2022-2024, Arm Limited. All rights reserved. 3# 4# SPDX-License-Identifier: BSD-3-Clause 5# 6 7# This file lists all of the architectural features, and initializes 8# and enables them based on the configured architecture version. 9 10# This file follows the following format: 11# - Enable mandatory feature if not updated, as applicable to an Arch Version. 12# - By default disable any mandatory features if they have not been defined yet. 13# - Disable or enable any optional feature this would be enabled/disabled if needed by platform. 14 15# 16################################################################################ 17# Enable Mandatory features if not updated yet, based on Arch versions. 18################################################################################ 19# 20 21# Enable the features which are mandatory from ARCH version 8.1 and upwards. 22ifeq "8.1" "$(word 1, $(sort 8.1 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 23armv8-1-a-feats := ENABLE_FEAT_PAN ENABLE_FEAT_VHE 24 25FEAT_LIST := ${armv8-1-a-feats} 26endif 27 28# Enable the features which are mandatory from ARCH version 8.2 and upwards. 29ifeq "8.2" "$(word 1, $(sort 8.2 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 30armv8-2-a-feats := ENABLE_FEAT_RAS 31# 8.1 Compliant 32armv8-2-a-feats += ${armv8-1-a-feats} 33 34FEAT_LIST := ${armv8-2-a-feats} 35endif 36 37# Enable the features which are mandatory from ARCH version 8.3 and upwards. 38ifeq "8.3" "$(word 1, $(sort 8.3 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 39# 8.2 Compliant 40armv8-3-a-feats += ${armv8-2-a-feats} 41 42FEAT_LIST := ${armv8-3-a-feats} 43endif 44 45# Enable the features which are mandatory from ARCH version 8.4 and upwards. 46ifeq "8.4" "$(word 1, $(sort 8.4 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 47armv8-4-a-feats := ENABLE_FEAT_SEL2 ENABLE_TRF_FOR_NS ENABLE_FEAT_DIT 48# 8.3 Compliant 49armv8-4-a-feats += ${armv8-3-a-feats} 50 51FEAT_LIST := ${armv8-4-a-feats} 52endif 53 54# Enable the features which are mandatory from ARCH version 8.5 and upwards. 55ifeq "8.5" "$(word 1, $(sort 8.5 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 56armv8-5-a-feats := ENABLE_FEAT_RNG ENABLE_FEAT_SB 57# 8.4 Compliant 58armv8-5-a-feats += ${armv8-4-a-feats} 59 60FEAT_LIST := ${armv8-5-a-feats} 61# Enable Memory tagging, Branch Target Identification for aarch64 only. 62ifeq ($(ARCH), aarch64) 63 mem_tag_arch_support ?= yes 64endif #(ARCH=aarch64) 65 66endif 67 68# Enable the features which are mandatory from ARCH version 8.6 and upwards. 69ifeq "8.6" "$(word 1, $(sort 8.6 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 70armv8-6-a-feats := ENABLE_FEAT_ECV ENABLE_FEAT_FGT 71# 8.5 Compliant 72armv8-6-a-feats += ${armv8-5-a-feats} 73FEAT_LIST := ${armv8-6-a-feats} 74endif 75 76# Enable the features which are mandatory from ARCH version 8.7 and upwards. 77ifeq "8.7" "$(word 1, $(sort 8.7 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 78armv8-7-a-feats := ENABLE_FEAT_HCX 79# 8.6 Compliant 80armv8-7-a-feats += ${armv8-6-a-feats} 81FEAT_LIST := ${armv8-7-a-feats} 82endif 83 84# Enable the features which are mandatory from ARCH version 8.8 and upwards. 85ifeq "8.8" "$(word 1, $(sort 8.8 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 86armv8-8-a-feats := ENABLE_FEAT_MOPS 87# 8.7 Compliant 88armv8-8-a-feats += ${armv8-7-a-feats} 89FEAT_LIST := ${armv8-8-a-feats} 90endif 91 92# Enable the features which are mandatory from ARCH version 8.9 and upwards. 93ifeq "8.9" "$(word 1, $(sort 8.9 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 94armv8-9-a-feats := ENABLE_FEAT_TCR2 ENABLE_FEAT_DEBUGV8P9 ENABLE_FEAT_SCTLR2 95# 8.8 Compliant 96armv8-9-a-feats += ${armv8-8-a-feats} 97FEAT_LIST := ${armv8-9-a-feats} 98endif 99 100# Enable the features which are mandatory from ARCH version 9.0 and upwards. 101ifeq "9.0" "$(word 1, $(sort 9.0 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 102# 8.5 Compliant 103armv9-0-a-feats += ${armv8-5-a-feats} 104FEAT_LIST := ${armv9-0-a-feats} 105endif 106 107# Enable the features which are mandatory from ARCH version 9.1 and upwards. 108ifeq "9.1" "$(word 1, $(sort 9.1 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 109# 8.6 and 9.0 Compliant 110armv9-1-a-feats += ${armv8-6-a-feats} ${armv9-0-a-feats} 111FEAT_LIST := ${armv9-1-a-feats} 112endif 113 114# Enable the features which are mandatory from ARCH version 9.2 and upwards. 115ifeq "9.2" "$(word 1, $(sort 9.2 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 116# 8.7 and 9.1 Compliant 117armv9-2-a-feats += ${armv8-7-a-feats} ${armv9-1-a-feats} 118FEAT_LIST := ${armv9-2-a-feats} 119endif 120 121# Enable the features which are mandatory from ARCH version 9.3 and upwards. 122ifeq "9.3" "$(word 1, $(sort 9.3 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" 123# 8.8 and 9.2 Compliant 124armv9-3-a-feats += ${armv8-8-a-feats} ${armv9-2-a-feats} 125FEAT_LIST := ${armv9-3-a-feats} 126endif 127 128# Set all FEAT_* in FEAT_LIST to '1' if they are not yet defined or set 129# from build commandline options or platform makefile. 130$(eval $(call default_ones, ${sort ${FEAT_LIST}})) 131 132# 133################################################################################ 134# Set mandatory features by default to zero, if they are not already updated. 135################################################################################ 136# 137 138#---- 139# 8.1 140#---- 141 142# Flag to enable access to Privileged Access Never bit of PSTATE. 143ENABLE_FEAT_PAN ?= 0 144 145# Flag to enable Virtualization Host Extensions. 146ENABLE_FEAT_VHE ?= 0 147 148#---- 149# 8.2 150#---- 151 152# Enable RAS Support. 153ENABLE_FEAT_RAS ?= 0 154 155#---- 156# 8.3 157#---- 158 159# Flag to enable Pointer Authentication. Internal flag not meant for 160# direct setting. Use BRANCH_PROTECTION to enable PAUTH. 161ENABLE_PAUTH ?= 0 162 163# Include pointer authentication (ARMv8.3-PAuth) registers in cpu context. This 164# must be set to 1 if the platform wants to use this feature in the Secure 165# world. It is not necessary for use in the Non-secure world. 166CTX_INCLUDE_PAUTH_REGS ?= 0 167 168 169#---- 170# 8.4 171#---- 172 173# Flag to enable Secure EL-2 feature. 174ENABLE_FEAT_SEL2 ?= 0 175 176# By default, disable trace filter control register access to lower non-secure 177# exception levels, i.e. NS-EL2, or NS-EL1 if NS-EL2 is implemented, but 178# trace filter control register access is unused if FEAT_TRF is implemented. 179ENABLE_TRF_FOR_NS ?= 0 180 181# Flag to enable Data Independent Timing instructions. 182ENABLE_FEAT_DIT ?= 0 183 184#---- 185# 8.5 186#---- 187 188# Flag to enable Branch Target Identification. 189# Internal flag not meant for direct setting. 190# Use BRANCH_PROTECTION to enable BTI. 191ENABLE_BTI ?= 0 192 193# Flag to enable access to the Random Number Generator registers. 194ENABLE_FEAT_RNG ?= 0 195 196# Flag to enable Speculation Barrier Instruction. 197ENABLE_FEAT_SB ?= 0 198 199#---- 200# 8.6 201#---- 202 203# Flag to enable access to the CNTPOFF_EL2 register. 204ENABLE_FEAT_ECV ?= 0 205 206# Flag to enable access to the HDFGRTR_EL2 register. 207ENABLE_FEAT_FGT ?= 0 208 209#---- 210# 8.7 211#---- 212 213# Flag to enable access to the HCRX_EL2 register by setting SCR_EL3.HXEn. 214ENABLE_FEAT_HCX ?= 0 215 216#---- 217# 8.8 218#---- 219 220# Flag to enable FEAT_MOPS (Standardization of Memory operations) 221# when INIT_UNUSED_NS_EL2 = 1 222ENABLE_FEAT_MOPS ?= 0 223 224#---- 225# 8.9 226#---- 227 228# Flag to enable access to TCR2 (FEAT_TCR2). 229ENABLE_FEAT_TCR2 ?= 0 230 231# Flag to enable access to SCTLR2 (FEAT_SCTLR2). 232ENABLE_FEAT_SCTLR2 ?= 0 233 234# 235################################################################################ 236# Optional Features defaulted to 0 or 2, if they are not enabled from 237# build option. Can also be disabled or enabled by platform if needed. 238################################################################################ 239# 240 241#---- 242# 8.0 243#---- 244 245# Flag to enable CSV2_2 extension. 246ENABLE_FEAT_CSV2_2 ?= 0 247 248# Flag to enable CSV2_3 extension. FEAT_CSV2_3 enables access to the 249# SCXTNUM_ELx register. 250ENABLE_FEAT_CSV2_3 ?= 0 251 252# By default, disable access of trace system registers from NS lower 253# ELs i.e. NS-EL2, or NS-EL1 if NS-EL2 implemented but unused if 254# system register trace is implemented. This feature is available if 255# trace unit such as ETMv4.x, This feature is OPTIONAL and is only 256# permitted in Armv8 implementations. 257ENABLE_SYS_REG_TRACE_FOR_NS ?= 0 258 259#---- 260# 8.2 261#---- 262 263# Build option to enable/disable the Statistical Profiling Extension, 264# keep it enabled by default for AArch64. 265ifeq (${ARCH},aarch64) 266 ENABLE_SPE_FOR_NS ?= 2 267else ifeq (${ARCH},aarch32) 268 ifneq ($(or $(ENABLE_SPE_FOR_NS),0),0) 269 $(error ENABLE_SPE_FOR_NS is not supported for AArch32) 270 else 271 ENABLE_SPE_FOR_NS := 0 272 endif 273endif 274 275# Enable SVE for non-secure world by default. 276ifeq (${ARCH},aarch64) 277 ENABLE_SVE_FOR_NS ?= 2 278# SVE is only supported on AArch64 so disable it on AArch32. 279else ifeq (${ARCH},aarch32) 280 ifneq ($(or $(ENABLE_SVE_FOR_NS),0),0) 281 $(error ENABLE_SVE_FOR_NS is not supported for AArch32) 282 else 283 ENABLE_SVE_FOR_NS := 0 284 endif 285endif 286 287#---- 288# 8.4 289#---- 290 291# Feature flags for supporting Activity monitor extensions. 292ENABLE_FEAT_AMU ?= 0 293ENABLE_AMU_AUXILIARY_COUNTERS ?= 0 294AMU_RESTRICT_COUNTERS ?= 1 295 296# Build option to enable MPAM for lower ELs. 297# Enabling it by default 298ifeq (${ARCH},aarch64) 299 ENABLE_FEAT_MPAM ?= 2 300else ifeq (${ARCH},aarch32) 301 ifneq ($(or $(ENABLE_FEAT_MPAM),0),0) 302 $(error ENABLE_FEAT_MPAM is not supported for AArch32) 303 else 304 ENABLE_FEAT_MPAM := 0 305 endif 306endif 307 308# Include nested virtualization control (Armv8.4-NV) registers in cpu context. 309# This must be set to 1 if architecture implements Nested Virtualization 310# Extension and platform wants to use this feature in the Secure world. 311CTX_INCLUDE_NEVE_REGS ?= 0 312 313#---- 314# 8.5 315#---- 316 317# Flag to enable support for EL3 trapping of reads of the RNDR and RNDRRS 318# registers, by setting SCR_EL3.TRNDR. 319ENABLE_FEAT_RNG_TRAP ?= 0 320 321# Enable FEAT_MTE2. This must be set to 1 if the platform wants 322# to use this feature and is enabled at ELX. 323ENABLE_FEAT_MTE2 ?= 0 324 325#---- 326# 8.6 327#---- 328 329# Flag to enable AMUv1p1 extension. 330ENABLE_FEAT_AMUv1p1 ?= 0 331 332# Flag to enable delayed trapping of WFE instruction (FEAT_TWED). 333ENABLE_FEAT_TWED ?= 0 334 335# In v8.6+ platforms with delayed trapping of WFE being supported 336# via FEAT_TWED, this flag takes the delay value to be set in the 337# SCR_EL3.TWEDEL(4bit) field, when FEAT_TWED is implemented. 338# By default it takes 0, and need to be updated by the platforms. 339TWED_DELAY ?= 0 340 341# Disable MTPMU if FEAT_MTPMU is supported. 342DISABLE_MTPMU ?= 0 343 344# Flag to enable FEAT_FGT2 (Fine Granular Traps 2) 345ENABLE_FEAT_FGT2 ?= 0 346 347# LoadStore64Bytes extension using the ACCDATA_EL1 system register 348ENABLE_FEAT_LS64_ACCDATA ?= 0 349 350#---- 351# 8.8 352#---- 353 354# Flag to enable FEAT_THE (Translation Hardening Extension) 355ENABLE_FEAT_THE ?= 0 356 357#---- 358# 8.9 359#---- 360 361# Flag to enable access to Stage 2 Permission Indirection (FEAT_S2PIE). 362ENABLE_FEAT_S2PIE ?= 0 363 364# Flag to enable access to Stage 1 Permission Indirection (FEAT_S1PIE). 365ENABLE_FEAT_S1PIE ?= 0 366 367# Flag to enable access to Stage 2 Permission Overlay (FEAT_S2POE). 368ENABLE_FEAT_S2POE ?= 0 369 370# Flag to enable access to Stage 1 Permission Overlay (FEAT_S1POE). 371ENABLE_FEAT_S1POE ?= 0 372 373# Flag to enable access to Arm v8.9 Debug extension 374ENABLE_FEAT_DEBUGV8P9 ?= 0 375 376#---- 377# 9.0 378#---- 379 380# Scalable Matrix Extension for non-secure world. 381ENABLE_SME_FOR_NS ?= 0 382 383# Scalable Vector Extension for secure world. 384ENABLE_SVE_FOR_SWD ?= 0 385 386# By default, disable access of trace buffer control registers from NS 387# lower ELs i.e. NS-EL2, or NS-EL1 if NS-EL2 implemented but unused 388# if FEAT_TRBE is implemented. 389# Note FEAT_TRBE is only supported on AArch64 - therefore do not enable in 390# AArch32. 391ifeq (${ARCH},aarch64) 392 ENABLE_TRBE_FOR_NS ?= 0 393else ifeq (${ARCH},aarch32) 394 ifneq ($(or $(ENABLE_TRBE_FOR_NS),0),0) 395 $(error ENABLE_TRBE_FOR_NS is not supported for AArch32) 396 else 397 ENABLE_TRBE_FOR_NS := 0 398 endif 399endif 400 401#---- 402# 9.2 403#---- 404 405# Flag to enable Realm Management Extension (FEAT_RME). 406ENABLE_RME ?= 0 407 408# Scalable Matrix Extension version 2 for non-secure world. 409ENABLE_SME2_FOR_NS ?= 0 410 411# Scalable Matrix Extension for secure world. 412ENABLE_SME_FOR_SWD ?= 0 413 414# By default, disable access to branch record buffer control registers from NS 415# lower ELs i.e. NS-EL2, or NS-EL1 if NS-EL2 implemented but unused 416# if FEAT_BRBE is implemented. 417ENABLE_BRBE_FOR_NS ?= 0 418 419# Flag to enable Floating point exception Mode Register Feature (FEAT_FPMR) 420ENABLE_FEAT_FPMR ?= 0 421 422# Flag to enable Memory Encryption Contexts (FEAT_MEC). 423ENABLE_FEAT_MEC ?= 0 424 425#---- 426# 9.3 427#---- 428# Flag to enable access to Arm v9.3 FEAT_D128 extension 429ENABLE_FEAT_D128 ?= 0 430 431#---- 432#9.4 433#---- 434 435# Flag to enable access to Guarded Control Stack (FEAT_GCS). 436ENABLE_FEAT_GCS ?= 0 437