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Diffstat (limited to '')
| -rw-r--r-- | make_helpers/arch_features.mk | 333 |
1 files changed, 333 insertions, 0 deletions
diff --git a/make_helpers/arch_features.mk b/make_helpers/arch_features.mk new file mode 100644 index 0000000..a337e76 --- /dev/null +++ b/make_helpers/arch_features.mk @@ -0,0 +1,333 @@ +# +# Copyright (c) 2022-2023, Arm Limited. All rights reserved. +# +# SPDX-License-Identifier: BSD-3-Clause +# + +# This file lists all of the architectural features, and initializes +# and enables them based on the configured architecture version. + +# This file follows the following format: +# - Enable mandatory feature if applicable to an Arch Version. +# - By default disable any mandatory features if they have not been defined yet. +# - Disable or enable any optional feature this would be enabled/disabled if needed by platform. + +# +################################################################################ +# Enable Mandatory features based on Arch versions. +################################################################################ +# + +# Enable the features which are mandatory from ARCH version 8.1 and upwards. +ifeq "8.1" "$(word 1, $(sort 8.1 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" +ENABLE_FEAT_PAN := 1 +ENABLE_FEAT_VHE := 1 +endif + +# Enable the features which are mandatory from ARCH version 8.2 and upwards. +ifeq "8.2" "$(word 1, $(sort 8.2 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" +ENABLE_FEAT_RAS := 1 +endif + +# Enable the features which are mandatory from ARCH version 8.4 and upwards. +ifeq "8.4" "$(word 1, $(sort 8.4 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" +ENABLE_FEAT_SEL2 := 1 +ENABLE_TRF_FOR_NS := 1 +ENABLE_FEAT_DIT := 1 +endif + +# Enable the features which are mandatory from ARCH version 8.5 and upwards. +ifeq "8.5" "$(word 1, $(sort 8.5 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" +ENABLE_FEAT_RNG := 1 +ENABLE_FEAT_SB := 1 + +# Enable Memory tagging, Branch Target Identification for aarch64 only. +ifeq ($(ARCH), aarch64) + mem_tag_arch_support := yes +endif #(ARCH=aarch64) + +endif + +# Enable the features which are mandatory from ARCH version 8.6 and upwards. +ifeq "8.6" "$(word 1, $(sort 8.6 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" +ENABLE_FEAT_ECV := 1 +ENABLE_FEAT_FGT := 1 +endif + +# Enable the features which are mandatory from ARCH version 8.7 and upwards. +ifeq "8.7" "$(word 1, $(sort 8.7 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" +ENABLE_FEAT_HCX := 1 +endif + +# Enable the features which are mandatory from ARCH version 8.9 and upwards. +ifeq "8.9" "$(word 1, $(sort 8.9 $(ARM_ARCH_MAJOR).$(ARM_ARCH_MINOR)))" +ENABLE_FEAT_TCR2 := 1 +endif + +# +################################################################################ +# Set mandatory features by default to zero. +################################################################################ +# + +#---- +# 8.1 +#---- + +# Flag to enable access to Privileged Access Never bit of PSTATE. +ENABLE_FEAT_PAN ?= 0 + +# Flag to enable Virtualization Host Extensions. +ENABLE_FEAT_VHE ?= 0 + +#---- +# 8.2 +#---- + +# Enable RAS Support. +ENABLE_FEAT_RAS ?= 0 + +#---- +# 8.3 +#---- + +# Flag to enable Pointer Authentication. Internal flag not meant for +# direct setting. Use BRANCH_PROTECTION to enable PAUTH. +ENABLE_PAUTH ?= 0 + +# Include pointer authentication (ARMv8.3-PAuth) registers in cpu context. This +# must be set to 1 if the platform wants to use this feature in the Secure +# world. It is not necessary for use in the Non-secure world. +CTX_INCLUDE_PAUTH_REGS ?= 0 + + +#---- +# 8.4 +#---- + +# Flag to enable Secure EL-2 feature. +ENABLE_FEAT_SEL2 ?= 0 + +# By default, disable trace filter control register access to lower non-secure +# exception levels, i.e. NS-EL2, or NS-EL1 if NS-EL2 is implemented, but +# trace filter control register access is unused if FEAT_TRF is implemented. +ENABLE_TRF_FOR_NS ?= 0 + +# Flag to enable Data Independent Timing instructions. +ENABLE_FEAT_DIT ?= 0 + +#---- +# 8.5 +#---- + +# Flag to enable Branch Target Identification. +# Internal flag not meant for direct setting. +# Use BRANCH_PROTECTION to enable BTI. +ENABLE_BTI ?= 0 + +# Flag to enable access to the Random Number Generator registers. +ENABLE_FEAT_RNG ?= 0 + +# Flag to enable Speculation Barrier Instruction. +ENABLE_FEAT_SB ?= 0 + +#---- +# 8.6 +#---- + +# Flag to enable access to the CNTPOFF_EL2 register. +ENABLE_FEAT_ECV ?= 0 + +# Flag to enable access to the HDFGRTR_EL2 register. +ENABLE_FEAT_FGT ?= 0 + +#---- +# 8.7 +#---- + +# Flag to enable access to the HCRX_EL2 register by setting SCR_EL3.HXEn. +ENABLE_FEAT_HCX ?= 0 + +#---- +# 8.9 +#---- + +# Flag to enable access to TCR2 (FEAT_TCR2). +ENABLE_FEAT_TCR2 ?= 0 + +# +################################################################################ +# Optional Features defaulted to 0 or 2, if they are not enabled from +# build option. Can also be disabled or enabled by platform if needed. +################################################################################ +# + +#---- +# 8.0 +#---- + +# Flag to enable CSV2_2 extension. +ENABLE_FEAT_CSV2_2 ?= 0 + +# By default, disable access of trace system registers from NS lower +# ELs i.e. NS-EL2, or NS-EL1 if NS-EL2 implemented but unused if +# system register trace is implemented. This feature is available if +# trace unit such as ETMv4.x, This feature is OPTIONAL and is only +# permitted in Armv8 implementations. +ENABLE_SYS_REG_TRACE_FOR_NS ?= 0 + +#---- +# 8.2 +#---- + +# Build option to enable/disable the Statistical Profiling Extension, +# keep it enabled by default for AArch64. +ifeq (${ARCH},aarch64) + ENABLE_SPE_FOR_NS ?= 2 +else ifeq (${ARCH},aarch32) + ifneq ($(or $(ENABLE_SPE_FOR_NS),0),0) + $(error ENABLE_SPE_FOR_NS is not supported for AArch32) + else + ENABLE_SPE_FOR_NS := 0 + endif +endif + +# Enable SVE for non-secure world by default. +ifeq (${ARCH},aarch64) + ENABLE_SVE_FOR_NS ?= 2 +# SVE is only supported on AArch64 so disable it on AArch32. +else ifeq (${ARCH},aarch32) + ifneq ($(or $(ENABLE_SVE_FOR_NS),0),0) + $(error ENABLE_SVE_FOR_NS is not supported for AArch32) + else + ENABLE_SVE_FOR_NS := 0 + endif +endif + +#---- +# 8.4 +#---- + +# Feature flags for supporting Activity monitor extensions. +ENABLE_FEAT_AMU ?= 0 +ENABLE_AMU_AUXILIARY_COUNTERS ?= 0 +ENABLE_AMU_FCONF ?= 0 +AMU_RESTRICT_COUNTERS ?= 0 + +# Build option to enable MPAM for lower ELs. +# Enabling it by default +ifeq (${ARCH},aarch64) + ENABLE_FEAT_MPAM ?= 2 +else ifeq (${ARCH},aarch32) + ifneq ($(or $(ENABLE_FEAT_MPAM),0),0) + $(error ENABLE_FEAT_MPAM is not supported for AArch32) + else + ENABLE_FEAT_MPAM := 0 + endif +endif + +# Include nested virtualization control (Armv8.4-NV) registers in cpu context. +# This must be set to 1 if architecture implements Nested Virtualization +# Extension and platform wants to use this feature in the Secure world. +CTX_INCLUDE_NEVE_REGS ?= 0 + +#---- +# 8.5 +#---- + +# Flag to enable support for EL3 trapping of reads of the RNDR and RNDRRS +# registers, by setting SCR_EL3.TRNDR. +ENABLE_FEAT_RNG_TRAP ?= 0 + +# Include Memory Tagging Extension registers in cpu context. This must be set +# to 1 if the platform wants to use this feature in the Secure world and MTE is +# enabled at ELX. +CTX_INCLUDE_MTE_REGS ?= 0 + +#---- +# 8.6 +#---- + +# Flag to enable AMUv1p1 extension. +ENABLE_FEAT_AMUv1p1 ?= 0 + +# Flag to enable delayed trapping of WFE instruction (FEAT_TWED). +ENABLE_FEAT_TWED ?= 0 + +# In v8.6+ platforms with delayed trapping of WFE being supported +# via FEAT_TWED, this flag takes the delay value to be set in the +# SCR_EL3.TWEDEL(4bit) field, when FEAT_TWED is implemented. +# By default it takes 0, and need to be updated by the platforms. +TWED_DELAY ?= 0 + +# Disable MTPMU if FEAT_MTPMU is supported. +DISABLE_MTPMU ?= 0 + +#---- +# 8.9 +#---- + +# Flag to enable NoTagAccess memory region attribute for stage 2 of translation. +ENABLE_FEAT_MTE_PERM ?= 0 + +# Flag to enable access to Stage 2 Permission Indirection (FEAT_S2PIE). +ENABLE_FEAT_S2PIE ?= 0 + +# Flag to enable access to Stage 1 Permission Indirection (FEAT_S1PIE). +ENABLE_FEAT_S1PIE ?= 0 + +# Flag to enable access to Stage 2 Permission Overlay (FEAT_S2POE). +ENABLE_FEAT_S2POE ?= 0 + +# Flag to enable access to Stage 1 Permission Overlay (FEAT_S1POE). +ENABLE_FEAT_S1POE ?= 0 + +#---- +# 9.0 +#---- + +# Flag to enable Realm Management Extension (FEAT_RME). +ENABLE_RME ?= 0 + +# Scalable Matrix Extension for non-secure world. +ENABLE_SME_FOR_NS ?= 0 + +# Scalable Vector Extension for secure world. +ENABLE_SVE_FOR_SWD ?= 0 + +# By default, disable access of trace buffer control registers from NS +# lower ELs i.e. NS-EL2, or NS-EL1 if NS-EL2 implemented but unused +# if FEAT_TRBE is implemented. +# Note FEAT_TRBE is only supported on AArch64 - therefore do not enable in +# AArch32. +ifeq (${ARCH},aarch64) + ENABLE_TRBE_FOR_NS ?= 0 +else ifeq (${ARCH},aarch32) + ifneq ($(or $(ENABLE_TRBE_FOR_NS),0),0) + $(error ENABLE_TRBE_FOR_NS is not supported for AArch32) + else + ENABLE_TRBE_FOR_NS := 0 + endif +endif + +#---- +# 9.2 +#---- + +# Scalable Matrix Extension version 2 for non-secure world. +ENABLE_SME2_FOR_NS ?= 0 + +# Scalable Matrix Extension for secure world. +ENABLE_SME_FOR_SWD ?= 0 + +# By default, disable access to branch record buffer control registers from NS +# lower ELs i.e. NS-EL2, or NS-EL1 if NS-EL2 implemented but unused +# if FEAT_BRBE is implemented. +ENABLE_BRBE_FOR_NS ?= 0 + +#---- +#9.4 +#---- + +# Flag to enable access to Guarded Control Stack (FEAT_GCS). +ENABLE_FEAT_GCS ?= 0 |