| # SPDX-License-Identifier: (GPL-2.0 OR MIT) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/riscv/extensions.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: RISC-V ISA extensions |
| |
| maintainers: |
| - Paul Walmsley <paul.walmsley@sifive.com> |
| - Palmer Dabbelt <palmer@sifive.com> |
| - Conor Dooley <conor@kernel.org> |
| |
| description: | |
| RISC-V has a large number of extensions, some of which are "standard" |
| extensions, meaning they are ratified by RISC-V International, and others |
| are "vendor" extensions. |
| This document defines properties that indicate whether a hart supports a |
| given extension. |
| |
| Once a standard extension has been ratified, no changes in behaviour can be |
| made without the creation of a new extension. |
| The properties for standard extensions therefore map to their originally |
| ratified states, with the exception of the I, Zicntr & Zihpm extensions. |
| See the "i" property for more information. |
| |
| select: |
| properties: |
| compatible: |
| contains: |
| const: riscv |
| |
| properties: |
| riscv,isa: |
| description: |
| Identifies the specific RISC-V instruction set architecture |
| supported by the hart. These are documented in the RISC-V |
| User-Level ISA document, available from |
| https://riscv.org/specifications/ |
| |
| Due to revisions of the ISA specification, some deviations |
| have arisen over time. |
| Notably, riscv,isa was defined prior to the creation of the |
| Zicntr, Zicsr, Zifencei and Zihpm extensions and thus "i" |
| implies "zicntr_zicsr_zifencei_zihpm". |
| |
| While the isa strings in ISA specification are case |
| insensitive, letters in the riscv,isa string must be all |
| lowercase. |
| $ref: /schemas/types.yaml#/definitions/string |
| pattern: ^rv(?:64|32)imaf?d?q?c?b?k?j?p?v?h?(?:[hsxz](?:[0-9a-z])+)?(?:_[hsxz](?:[0-9a-z])+)*$ |
| deprecated: true |
| |
| riscv,isa-base: |
| description: |
| The base ISA implemented by this hart, as described by the 20191213 |
| version of the unprivileged ISA specification. |
| enum: |
| - rv32i |
| - rv64i |
| |
| riscv,isa-extensions: |
| $ref: /schemas/types.yaml#/definitions/string-array |
| minItems: 1 |
| description: Extensions supported by the hart. |
| items: |
| anyOf: |
| # single letter extensions, in canonical order |
| - const: i |
| description: | |
| The base integer instruction set, as ratified in the 20191213 |
| version of the unprivileged ISA specification. |
| |
| This does not include Chapter 10, "Counters", which was moved into |
| the Zicntr and Zihpm extensions after the ratification of the |
| 20191213 version of the unprivileged specification. |
| |
| - const: m |
| description: |
| The standard M extension for integer multiplication and division, as |
| ratified in the 20191213 version of the unprivileged ISA |
| specification. |
| |
| - const: a |
| description: |
| The standard A extension for atomic instructions, as ratified in the |
| 20191213 version of the unprivileged ISA specification. |
| |
| - const: f |
| description: |
| The standard F extension for single-precision floating point, as |
| ratified in the 20191213 version of the unprivileged ISA |
| specification. |
| |
| - const: d |
| description: |
| The standard D extension for double-precision floating-point, as |
| ratified in the 20191213 version of the unprivileged ISA |
| specification. |
| |
| - const: q |
| description: |
| The standard Q extension for quad-precision floating-point, as |
| ratified in the 20191213 version of the unprivileged ISA |
| specification. |
| |
| - const: c |
| description: |
| The standard C extension for compressed instructions, as ratified in |
| the 20191213 version of the unprivileged ISA specification. |
| |
| - const: v |
| description: |
| The standard V extension for vector operations, as ratified |
| in-and-around commit 7a6c8ae ("Fix text that describes vfmv.v.f |
| encoding") of the riscv-v-spec. |
| |
| - const: h |
| description: |
| The standard H extension for hypervisors as ratified in the 20191213 |
| version of the privileged ISA specification. |
| |
| # multi-letter extensions, sorted alphanumerically |
| - const: smaia |
| description: | |
| The standard Smaia supervisor-level extension for the advanced |
| interrupt architecture for machine-mode-visible csr and behavioural |
| changes to interrupts as frozen at commit ccbddab ("Merge pull |
| request #42 from riscv/jhauser-2023-RC4") of riscv-aia. |
| |
| - const: smstateen |
| description: | |
| The standard Smstateen extension for controlling access to CSRs |
| added by other RISC-V extensions in H/S/VS/U/VU modes and as |
| ratified at commit a28bfae (Ratified (#7)) of riscv-state-enable. |
| |
| - const: ssaia |
| description: | |
| The standard Ssaia supervisor-level extension for the advanced |
| interrupt architecture for supervisor-mode-visible csr and |
| behavioural changes to interrupts as frozen at commit ccbddab |
| ("Merge pull request #42 from riscv/jhauser-2023-RC4") of riscv-aia. |
| |
| - const: sscofpmf |
| description: | |
| The standard Sscofpmf supervisor-level extension for count overflow |
| and mode-based filtering as ratified at commit 01d1df0 ("Add ability |
| to manually trigger workflow. (#2)") of riscv-count-overflow. |
| |
| - const: sstc |
| description: | |
| The standard Sstc supervisor-level extension for time compare as |
| ratified at commit 3f9ed34 ("Add ability to manually trigger |
| workflow. (#2)") of riscv-time-compare. |
| |
| - const: svinval |
| description: |
| The standard Svinval supervisor-level extension for fine-grained |
| address-translation cache invalidation as ratified in the 20191213 |
| version of the privileged ISA specification. |
| |
| - const: svnapot |
| description: |
| The standard Svnapot supervisor-level extensions for napot |
| translation contiguity as ratified in the 20191213 version of the |
| privileged ISA specification. |
| |
| - const: svpbmt |
| description: |
| The standard Svpbmt supervisor-level extensions for page-based |
| memory types as ratified in the 20191213 version of the privileged |
| ISA specification. |
| |
| - const: zacas |
| description: | |
| The Zacas extension for Atomic Compare-and-Swap (CAS) instructions |
| is supported as ratified at commit 5059e0ca641c ("update to |
| ratified") of the riscv-zacas. |
| |
| - const: zba |
| description: | |
| The standard Zba bit-manipulation extension for address generation |
| acceleration instructions as ratified at commit 6d33919 ("Merge pull |
| request #158 from hirooih/clmul-fix-loop-end-condition") of |
| riscv-bitmanip. |
| |
| - const: zbb |
| description: | |
| The standard Zbb bit-manipulation extension for basic bit-manipulation |
| as ratified at commit 6d33919 ("Merge pull request #158 from |
| hirooih/clmul-fix-loop-end-condition") of riscv-bitmanip. |
| |
| - const: zbc |
| description: | |
| The standard Zbc bit-manipulation extension for carry-less |
| multiplication as ratified at commit 6d33919 ("Merge pull request |
| #158 from hirooih/clmul-fix-loop-end-condition") of riscv-bitmanip. |
| |
| - const: zbkb |
| description: |
| The standard Zbkb bitmanip instructions for cryptography as ratified |
| in version 1.0 of RISC-V Cryptography Extensions Volume I |
| specification. |
| |
| - const: zbkc |
| description: |
| The standard Zbkc carry-less multiply instructions as ratified |
| in version 1.0 of RISC-V Cryptography Extensions Volume I |
| specification. |
| |
| - const: zbkx |
| description: |
| The standard Zbkx crossbar permutation instructions as ratified |
| in version 1.0 of RISC-V Cryptography Extensions Volume I |
| specification. |
| |
| - const: zbs |
| description: | |
| The standard Zbs bit-manipulation extension for single-bit |
| instructions as ratified at commit 6d33919 ("Merge pull request #158 |
| from hirooih/clmul-fix-loop-end-condition") of riscv-bitmanip. |
| |
| - const: zfa |
| description: |
| The standard Zfa extension for additional floating point |
| instructions, as ratified in commit 056b6ff ("Zfa is ratified") of |
| riscv-isa-manual. |
| |
| - const: zfh |
| description: |
| The standard Zfh extension for 16-bit half-precision binary |
| floating-point instructions, as ratified in commit 64074bc ("Update |
| version numbers for Zfh/Zfinx") of riscv-isa-manual. |
| |
| - const: zfhmin |
| description: |
| The standard Zfhmin extension which provides minimal support for |
| 16-bit half-precision binary floating-point instructions, as ratified |
| in commit 64074bc ("Update version numbers for Zfh/Zfinx") of |
| riscv-isa-manual. |
| |
| - const: zk |
| description: |
| The standard Zk Standard Scalar cryptography extension as ratified |
| in version 1.0 of RISC-V Cryptography Extensions Volume I |
| specification. |
| |
| - const: zkn |
| description: |
| The standard Zkn NIST algorithm suite extensions as ratified in |
| version 1.0 of RISC-V Cryptography Extensions Volume I |
| specification. |
| |
| - const: zknd |
| description: | |
| The standard Zknd for NIST suite: AES decryption instructions as |
| ratified in version 1.0 of RISC-V Cryptography Extensions Volume I |
| specification. |
| |
| - const: zkne |
| description: | |
| The standard Zkne for NIST suite: AES encryption instructions as |
| ratified in version 1.0 of RISC-V Cryptography Extensions Volume I |
| specification. |
| |
| - const: zknh |
| description: | |
| The standard Zknh for NIST suite: hash function instructions as |
| ratified in version 1.0 of RISC-V Cryptography Extensions Volume I |
| specification. |
| |
| - const: zkr |
| description: |
| The standard Zkr entropy source extension as ratified in version |
| 1.0 of RISC-V Cryptography Extensions Volume I specification. |
| This string being present means that the CSR associated to this |
| extension is accessible at the privilege level to which that |
| device-tree has been provided. |
| |
| - const: zks |
| description: |
| The standard Zks ShangMi algorithm suite extensions as ratified in |
| version 1.0 of RISC-V Cryptography Extensions Volume I |
| specification. |
| |
| - const: zksed |
| description: | |
| The standard Zksed for ShangMi suite: SM4 block cipher instructions |
| as ratified in version 1.0 of RISC-V Cryptography Extensions |
| Volume I specification. |
| |
| - const: zksh |
| description: | |
| The standard Zksh for ShangMi suite: SM3 hash function instructions |
| as ratified in version 1.0 of RISC-V Cryptography Extensions |
| Volume I specification. |
| |
| - const: zkt |
| description: |
| The standard Zkt for data independent execution latency as ratified |
| in version 1.0 of RISC-V Cryptography Extensions Volume I |
| specification. |
| |
| - const: zicbom |
| description: |
| The standard Zicbom extension for base cache management operations as |
| ratified in commit 3dd606f ("Create cmobase-v1.0.pdf") of riscv-CMOs. |
| |
| - const: zicbop |
| description: |
| The standard Zicbop extension for cache-block prefetch instructions |
| as ratified in commit 3dd606f ("Create cmobase-v1.0.pdf") of |
| riscv-CMOs. |
| |
| - const: zicboz |
| description: |
| The standard Zicboz extension for cache-block zeroing as ratified |
| in commit 3dd606f ("Create cmobase-v1.0.pdf") of riscv-CMOs. |
| |
| - const: zicntr |
| description: |
| The standard Zicntr extension for base counters and timers, as |
| ratified in the 20191213 version of the unprivileged ISA |
| specification. |
| |
| - const: zicond |
| description: |
| The standard Zicond extension for conditional arithmetic and |
| conditional-select/move operations as ratified in commit 95cf1f9 |
| ("Add changes requested by Ved during signoff") of riscv-zicond. |
| |
| - const: zicsr |
| description: | |
| The standard Zicsr extension for control and status register |
| instructions, as ratified in the 20191213 version of the |
| unprivileged ISA specification. |
| |
| This does not include Chapter 10, "Counters", which documents |
| special case read-only CSRs, that were moved into the Zicntr and |
| Zihpm extensions after the ratification of the 20191213 version of |
| the unprivileged specification. |
| |
| - const: zifencei |
| description: |
| The standard Zifencei extension for instruction-fetch fence, as |
| ratified in the 20191213 version of the unprivileged ISA |
| specification. |
| |
| - const: zihintpause |
| description: |
| The standard Zihintpause extension for pause hints, as ratified in |
| commit d8ab5c7 ("Zihintpause is ratified") of the riscv-isa-manual. |
| |
| - const: zihintntl |
| description: |
| The standard Zihintntl extension for non-temporal locality hints, as |
| ratified in commit 0dc91f5 ("Zihintntl is ratified") of the |
| riscv-isa-manual. |
| |
| - const: zihpm |
| description: |
| The standard Zihpm extension for hardware performance counters, as |
| ratified in the 20191213 version of the unprivileged ISA |
| specification. |
| |
| - const: ztso |
| description: |
| The standard Ztso extension for total store ordering, as ratified |
| in commit 2e5236 ("Ztso is now ratified.") of the |
| riscv-isa-manual. |
| |
| - const: zvbb |
| description: |
| The standard Zvbb extension for vectored basic bit-manipulation |
| instructions, as ratified in commit 56ed795 ("Update |
| riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvbc |
| description: |
| The standard Zvbc extension for vectored carryless multiplication |
| instructions, as ratified in commit 56ed795 ("Update |
| riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvfh |
| description: |
| The standard Zvfh extension for vectored half-precision |
| floating-point instructions, as ratified in commit e2ccd05 |
| ("Remove draft warnings from Zvfh[min]") of riscv-v-spec. |
| |
| - const: zvfhmin |
| description: |
| The standard Zvfhmin extension for vectored minimal half-precision |
| floating-point instructions, as ratified in commit e2ccd05 |
| ("Remove draft warnings from Zvfh[min]") of riscv-v-spec. |
| |
| - const: zvkb |
| description: |
| The standard Zvkb extension for vector cryptography bit-manipulation |
| instructions, as ratified in commit 56ed795 ("Update |
| riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvkg |
| description: |
| The standard Zvkg extension for vector GCM/GMAC instructions, as |
| ratified in commit 56ed795 ("Update riscv-crypto-spec-vector.adoc") |
| of riscv-crypto. |
| |
| - const: zvkn |
| description: |
| The standard Zvkn extension for NIST algorithm suite instructions, as |
| ratified in commit 56ed795 ("Update riscv-crypto-spec-vector.adoc") |
| of riscv-crypto. |
| |
| - const: zvknc |
| description: |
| The standard Zvknc extension for NIST algorithm suite with carryless |
| multiply instructions, as ratified in commit 56ed795 ("Update |
| riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvkned |
| description: |
| The standard Zvkned extension for Vector AES block cipher |
| instructions, as ratified in commit 56ed795 ("Update |
| riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvkng |
| description: |
| The standard Zvkng extension for NIST algorithm suite with GCM |
| instructions, as ratified in commit 56ed795 ("Update |
| riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvknha |
| description: | |
| The standard Zvknha extension for NIST suite: vector SHA-2 secure, |
| hash (SHA-256 only) instructions, as ratified in commit |
| 56ed795 ("Update riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvknhb |
| description: | |
| The standard Zvknhb extension for NIST suite: vector SHA-2 secure, |
| hash (SHA-256 and SHA-512) instructions, as ratified in commit |
| 56ed795 ("Update riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvks |
| description: |
| The standard Zvks extension for ShangMi algorithm suite |
| instructions, as ratified in commit 56ed795 ("Update |
| riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvksc |
| description: |
| The standard Zvksc extension for ShangMi algorithm suite with |
| carryless multiplication instructions, as ratified in commit 56ed795 |
| ("Update riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvksed |
| description: | |
| The standard Zvksed extension for ShangMi suite: SM4 block cipher |
| instructions, as ratified in commit 56ed795 ("Update |
| riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvksh |
| description: | |
| The standard Zvksh extension for ShangMi suite: SM3 secure hash |
| instructions, as ratified in commit 56ed795 ("Update |
| riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvksg |
| description: |
| The standard Zvksg extension for ShangMi algorithm suite with GCM |
| instructions, as ratified in commit 56ed795 ("Update |
| riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| - const: zvkt |
| description: |
| The standard Zvkt extension for vector data-independent execution |
| latency, as ratified in commit 56ed795 ("Update |
| riscv-crypto-spec-vector.adoc") of riscv-crypto. |
| |
| additionalProperties: true |
| ... |
