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該文件包含所有 A-profile 特征名稱的列表。 從 2020 年 6 月起，功能名稱已全部更改為標準格式。
下表列出了舊的和新的功能名稱。 請注意，有些名稱已被拆分為兩個； 例如，ARMv8.0-AES 分為 AES 和 PMULL。

Old nameNew nameShort descriptionComments

ARMv8.0-AdvSIMD	FEAT_AdvSIMD	Advanced SIMD Extension
ARMv8.0-AES	FEAT_AES	Advanced SIMD AES instructions
ARMv8.0-AES	FEAT_PMULL	Advanced SIMD PMULL instructions	ARMv8.0-AES is split into AES and PMULL
ARMv8.0-CP15SDISABLE2	FEAT_CP15SDISABLE2	CP15DISABLE2
ARMv8.0-CSV2	FEAT_CSV2	Cache Speculation Variant 2
-	FEAT_CSV2_1p1	Cache Speculation Variant 2 version 1.1
-	FEAT_CSV2_1p2	Cache Speculation Variant 2 version 1.2
ARMv8.0-CSV2_2	FEAT_CSV2	Cache Speculation Variant 2 version 2
ARMv8.0-CSV3	FEAT_CSV3	Cache Speculation Variant 3
ARMv8.0-DGH	FEAT_DGH	Data Gathering Hint
ARMv8.0-DoubleLock	FEAT_DoubleLock	Double Lock
ARMv8.0-ETS	FEAT_ETS	Enhanced Translation Synchronization
ARMv8.0-FP	FEAT_FP	Floating point extension
-	FEAT_IVIPT	The IVIPT Extension
ARMv8.0-PCSample	FEAT_PCSRv8	PC Sample-base Profiling extension (not EL3 and EL2)
ARMv8.0-PredInv	FEAT_SPECRES	Speculation restriction instructions
RAS	FEAT_RAS	Reliability, Availability, and Serviceability (RAS) Extension
ARMv8.0-SB	FEAT_SB	Speculation barrier
ARMv8.0-SHA	FEAT_SHA1	Advanced SIMD SHA1 instructions
ARMv8.0-SHA	FEAT_SHA256	Advanced SIMD SHA256 instructions	Split ARMv8.2-SHA into SHA-256, SHA-512 and SHA-3
ARMv8.0-SSBS	FEAT_SSBS	Speculative Store Bypass Safe Instruction	ARMv8.0-SSBS is split into SSBS and SSBS2
ARMv8.0-SSBS	FEAT_SSBS2	MRS and MSR instructions for SSBS	ARMv8.0-SSBS is split into SSBS and SSBS2
-	FEAT_CRC32	CRC32 instructions
-	FEAT_nTLBPA	No intermediate caching by output address in TLB
ARMv8.1-Debug	FEAT_Debugv8p1	Debug with VHE
ARMv8.1-HPD	FEAT_HPDS	Hierarchical permission disables in translation tables
ARMv8.1-LOR	FEAT_LOR	Limited ordering regions
ARMv8.1-LSE	FEAT_LSE	Large System Extensions
ARMv8.1-PAN	FEAT_PAN	Privileged access-never
ARMv8.1-PMU	FEAT_PMUv3p1	PMU extensions version 3.1
ARMv8.1-RDMA	FEAT_RDM	Rounding double multiply accumulate
ARMv8.1-TTHM	FEAT_HAFDBS	Hardware updates to access flag and dirty state in translation tables
ARMv8.1-VHE	FEAT_VHE	Virtualization Host Extensions
ARMv8.1-VMID16	FEAT_VMID16	16-bit VMID
ARMv8.2-AA32BF16	FEAT_AA32BF16	AArch32 BFloat16 instructions
ARMv8.2-AA32HPD	FEAT_AA32HPD	AArch32 Hierarchical permission disables
ARMv8.2-AA32I8MM	FEAT_AA32I8MM	AArch32 Int8 Matrix Multiplication
ARMv8.2-ATS1E1	FEAT_PAN2	AT S1E1R and AT S1E1W instruction variants for PAN
ARMv8.2-BF16	FEAT_BF16	AARch64 BFloat16 instructions
ARMv8.2-DCCVADP	FEAT_DPB2	DC CVADP instruction
ARMv8.2-DCPoP	FEAT_DPB	DC CVAP instruction
ARMv8.2-Debug	FEAT_Debugv8p2	ARMv8.2 Debug
ARMv8.2-DotProd	FEAT_DotProd2	Advanced SIMD Int8 dot product instructions
ARMv8.2-EVT	FEAT_EVT	Enhanced Virtualization Traps
ARMv8.2-F32MM	FEAT_F32MM	SVE single-precision floating-point matrix multiply instruction
ARMv8.2-F64MM	FEAT_F64MM	SVE double-precision floating-point matrix multiply instruction
ARMv8.2-FHM	FEAT_FHM	Half-precision floating-point FMLAL instructions
ARMv8.2-FP16	FEAT_FP16	Half-precision floating-point data processing
ARMv8.2-I8MM	FEAT_I8MM	Int8 Matrix Multiplication
ARMv8.2-IESB	FEAT_IESB	Implicit Error synchronization event
ARMv8.2-LPA	FEAT_LPA	Large PA and IPA support
ARMv8.2-LSMAOC	FEAT_LSMAOC	Load/Store instruction multiple atomicity and ordering controls
ARMv8.2-LVA	FEAT_LVA	Large VA support
MPAM	FEAT_MPAM	Memory Partitioning and Monitoring
ARMv8.2-PCSample	FEAT_PCSRv8p2	PC Sample-based profiling version 8.2
ARMv8.2-SHA	FEAT_SHA3	Advanced SIMD EOR3, RAX1, XAR, and BCAX instructions	Split ARMv8.2-SHA into SHA-256, SHA-512 and SHA-3
ARMv8.2-SHA	FEAT_SHA512	Advanced SIMD SHA512 instructions	Split ARMv8.2-SHA into SHA-256, SHA-512 and SHA-3
ARMv8.2-SM	FEAT_SM3	Advanced SIMD SM3 instructions	Split into SM3 and SM4
ARMv8.2-SM	FEAT_SM4	Advanced SIMD SM4 instructions	Split into SM3 and SM4
SPE	FEAT_SPE	Statistical Profiling Extension
SVE	FEAT_SVE	Scalable Vector Extension
ARMv8.2-TTCNP	FEAT_TTCNP	Common not private translations
ARMv8.2-TTPBHA	FEAT_HPDS2	Heirarchical permission disables in translation tables 2
ARMv8.2-TTS2UXN	FEAT_XNX	Execute-never control distinction by Exception level at stage 2
ARMv8.2-UAO	FEAT_UAO	Unprivileged Access Override control
ARMv8.2-VPIPT	FEAT_VPIPT	VMID-aware PIPT instruction cache
ARMv8.3-CCIDX	FEAT_CCIDX	Extended cache index
ARMv8.3-CompNum	FEAT_FCMA	Floating-point FCMLA and FCADD instructions
ARMv8.3-DoPD	FEAT_DoPD	Debug over Powerdown
-	FEAT_EPAC	Enhanced Pointer authentication
ARMv8.3-FPAC	FEAT_FPAC	Faulting on pointer authentication instructions
-	FEAT_FPACCOMBINE	Faulting on combined pointer authentication instructions
ARMv8.3-JSConv	FEAT_JSCVT	JavaScript FJCVTS conversion instruction
ARMv8.3-RCpc	FEAT_LRCPC	Load-acquire RCpc instructions
ARMv8.3-NV	FEAT_NV	Nested virtualization
-	FEAT_PACQARMA5	Pointer authentication - QARMA5 algorithm
-	FEAT_PACIMP	Pointer authentication - IMPLEMENTATION DEFINED algorithm
ARMv8.3-TPAuth	FEAT_PAuth	Pointer authentication
ARMv8.3-PAuth2	FEAT_PAuth2	Enhancements to pointer authentication
ARMv8.3-SPE	FEAT_SPEv1p1	Statistical Profiling Extensions version 1.1
AMUv1	FEAT_AMUv1	Activity Monitors Extension
ARMv8.4-CNTSC	FEAT_CNTSC	Generic Counter Scaling
ARMv8.4-Debug	FEAT_Debugv8p4	Debug relaxations and extensions version 8.4
ARMv8.4-DFE	FEAT_DoubleFault	Double Fault Extension
ARMv8.4-DIT	FEAT_DIT	Data Independent Timing instructions
ARMv8.4-CondM	FEAT_FlagM	Condition flag manipulation
ARMv8.4-IDST	FEAT_IDST	ID space trap handling
ARMv8.4-RCpc	FEAT_LRCPC2	Load-acquire RCpc instructions version 2
ARMv8.4-LSE	FEAT_LSE2	Large System Extensions version 2
ARMv8.4-NV	FEAT_NV2	Enhanced support for nested virtualization
ARMv8.4-PMU	FEAT_PMUv3p4	PMU extension version 3.4
ARMv8.4-RAS	FEAT_RASv1p1	Reliability, Availability, and Serviceability (RAS) Extension version 1.1
ARMv8.4-S2FWB	FEAT_S2FWB	Stage 2 forced write-back
ARMv8.4-SecEL2	FEAT_SEL2	Secure EL2
ARMv8.4-TLBI	FEAT_TLBIOS	TLB invalidate outer-shared instructions	Split into TLBIOS and TLBIRANGE
ARMv8.4-TLBI	FEAT_TLBIRANGE	TLB range invalidate range instructions	Split into TLBIOS and TLBIRANGE
ARMv8.4-Trace	FEAT_TRF	Self hosted Trace Extensions
ARMv8.4-TTL	FEAT_TTL	Translation Table Level
ARMv8.4-TTRem	FEAT_BBM	Translation table break before make levels
ARMv8.4-TTST	FEAT_TTST	Small translation tables
ARMv8.5-BTI	FEAT_BTI	Branch target identification
ARMv8.5-CondM	FEAT_FlagM2	Condition flag manipulation version 2
ARMv8.5-CSEH	FEAT_ExS	Disabling context synchronizing exception entry and exit
ARMv8.5-E0PD	FEAT_E0PD	Preventing EL0 access to halves of address maps
ARMv8.5-FRINT	FEAT_FRINTTS	FRINT32Z, FRINT32X, FRINT64Z, and FRINT64X instructions
ARMv8.5-GTG	FEAT_GTG	Guest translation granule size
ARMv8.5-MemTag	FEAT_MTE	Instruction-only Memory Tagging Extension
ARMv8.5-MemTag	FEAT_MTE2	Full Memory Tagging Extension
ARMv8.5-PMU	FEAT_PMUv3p5	PMU Extension version 3.5
ARMv8.5-RNG	FEAT_RNG	Random number generator
ARMv8.6-AMU	FEAT_AMUv1p1	Activity Monitors Extension version 1.1
ARMv8.6-ECV	FEAT_ECV	Enhanced counter virtualization
ARMv8.6-FGT	FEAT_FGT	Fine Grain Traps
ARMv8.6-MPAM	FEAT_MPAMv0p1	Memory Partitioning and Monitoring version 0.1
ARMv8.6-MPAM	FEAT_MPAMv1p1	Memory Partitioning and Monitoring version1.1
ARMv8.6-MTPMU	FEAT_MTPMU	Multi-threaded PMU Extensions
ARMv8.6-TWED	FEAT_TWED	Delayed trapping of WFE
ETMv4	FEAT_ETMv4	Embedded Trace Macrocell version4
ETMv4.1	FEAT_ETMv4p1	Embedded Trace Macrocell version 4.1
ETMv4.2	FEAT_ETMv4p2	Embedded Trace Macrocell version 4.2
ETMv4.3	FEAT_ETMv4p3	Embedded Trace Macrocell version 4.3
ETMv4.4	FEAT_ETMv4p4	Embedded Trace Macrocell version 4.3
ETMv4.5	FEAT_ETMv4p5	Embedded Trace Macrocell version 4.4
ETMv4.6	FEAT_ETMv4p6	Embedded Trace Macrocell version 4.5
GICv3	FEAT_GICv3	Generic Interrupt Controller version 3
GICv3.1	FEAT_GICv3p1	Generic Interrupt Controller version 3.1
-	FEAT_GICv3_TDIR	Trapping Non-secure EL1 writes to ICV_DIR
GICv4	FEAT_GICv4	Generic Interrupt Controller version 4
GICv4.1	FEAT_GICv4p1	Generic Interrupt Controller version 4.1
PMUv3	FEAT_PMUv3	PMU extension version 3
ETE	FEAT_ETE	Embedded Trace Extension
ETEv1.1	FEAT_ETEv1p1	Embedded Trace Extension, version 1.1
SVE2	FEAT_SVE2	SVE version 2
SVE2-AES	FEAT_SVE_AES	SVE AES instructions
SVE2-AES	FEAT_SVE_PMULL128	SVE PMULL instructions	SVE2-AES is split into AES and PMULL support
SVE2-BitPerm	FEAT_SVE_BitPerm	SVE Bit Permute
SVE2-SHA3	FEAT_SVE_SHA3	SVE SHA-3 instructions
SVE2-SM4	FEAT_SVE_SM4	SVE SM4 instructions
TME	FEAT_TME	Transactional Memory Extension
TRBE	FEAT_TRBE	Trace Buffer Extension
-	FEAT_SME	Scalable Matrix Extension

2020 Architecture Extensions

Feature NameShort description

FEAT_AFP	Alternate floating-point behavior
FEAT_HCX	Support for the HCRX_EL2 register
FEAT_LPA2	Larger physical address for 4KB and 16KB translation granules
FEAT_LS64	Support for 64 byte loads/stores without return
FEAT_LS64_V	Support for 64-byte stores with return
FEAT_LS64_ACCDATA	Support for 64-byte EL0 stores with return
FEAT_MTE3	MTE Asymmetric Fault Handling
FEAT_PAN3	Support for SCTLR_ELx.EPAN
FEAT_PMUv3p7	Armv8.7 PMU Extensions
FEAT_RPRES	Increased precision of Reciprocal Estimate and Reciprocal Square Root Estimate
FEAT_RME	Realm Management Extension
FEAT_SPEv1p2	Armv8.7 SPE
FEAT_WFxT	WFE and WFI instructions with timeout
FEAT_WFxT2	WFE and WFI instructions with timeout version 2
FEAT_XS	XS attribute
FEAT_BRBE	Branch Record Buffer Extensions

2021 Architecture Extensions

Feature NameShort description

FEAT_CMOW	Control for cache maintenance permission
FEAT_CONSTPACFIELD	PAC Algorithm enhancement
FEAT_Debugv8p8	Debug v8.8
FEAT_HBC	Hinted conditional branches
FEAT_HPMN0	Setting of MDCR_EL2.HPMN to zero
FEAT_NMI, FEAT_GICv3_NMI	Non-maskable Interrupts
FEAT_MOPS	Standardization of memory operations
FEAT_PACQARMA3	Pointer authentication - QARMA3 algorithm
FEAT_PMUv3_TH	Event counting threshold
FEAT_PMUv3p8	Armv8.8 PMU Extensions
FEAT_RNG_TRAP	Trapping support for RNDR and RNDRRS
FEAT_SPEv1p3	Armv8.8 Statistical Profiling Extensions
FEAT_TIDCP1	EL0 use of IMPLEMENTATION DEFINED functionality
FEAT_BRBEv1p1	Branch Record Buffer Extensions version 1.1

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