RISC-V International
Page History
The RISC-V specification process is governed by the Ratification Policy and more concisely articulated in the Specification Lifecycle and Milestone Definitions presentation.
This page serves as the starting point for understanding the status of specifications currently being developed by RISC-V. This status is best represented as progress toward the key Specification Milestones (Plan, Freeze, and Ratification-ready) which are obtained sequentially. Specific status for the relevant status columns is detailed in the Status Key section below.
...
Ratification Package
| extensions included | Specification State**** | Fast Track | Priv / Unpriv | Committee (Owner) | Task Group | Plan Milestone Target Date | Freeze Milestone Target Date | Ratification Milestone Target Date | Plan Milestone Next Step* | Freeze Milestone Next Step** | Ratification Milestone Next Step*** | Last Updated | Notes | In RVA2023 profile as mandatory or supported optional |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Advanced Interrupt Architecture (AIA)
| Smaia, Ssaia | Public Review Started | N | P | Priv HC (John Hauser, Anup Patel) | AIA | Q4'22 | Q1'23 | complete | complete | public review complete |
| Yy | ||
| Zca, Zcb, Zcd, Zcf, Zcmp, Zcmt | Frozen | N | U | (Tariq Kurd) | Code Size Reduction | Q4'22 | Q1'23 | grandfathered | complete | send out for public review | SAIL/ACT Waivers ABI issues being worked | Nn | |||
Conditional Ops | Zicondops | New | Y | U | Unpriv HC | N/A | Q1'23 | ||||||||
Debug
| New | N | P | Priv HC (Tim Newsom) | Debug TG | Q2'23 | review by chairs | acceptance criteria complete | start | Nn | |||||
| Smclic | Plan Complete | N | P | Priv HC (Dan Smathers) | Fast Interrupts | Q1'23 | N/A | spec development - stable | start | ? | Nn | ||||
| Svadu | Plan Complete | Y | P | Priv HC (Ved) | N/A | Q4'22 | Q1'23 | N/A | acceptance criteria complete | start | |||||
| Zicntr, Zihpm | Public Review Started | Y | U | Unpriv HC (Earl Killian) | N/A | Q4'22 | N/A | committee chair approval | public review complete | Review ends Dec. 23 | Yy | ||||
| "May Be Ops" (for CFI, etc.) | Zimops | Stable | Y | U | Unpriv HC (Andrew Waterman) | N/A | Q1'23 | N/A | AR approval | start | 08/22. need github spec | Nn | |||
| Zihintntl | Plan Complete | Y | P | Priv HC (Andrew Waterman) | N/A | Q1'23 | N/A | acceptance criteria complete | start | Update needed. | Yy | ||||
| Zbpbo, Zpn, Zpsfoperand, P | New | N | U | Unpriv HC (Kevin Chen) | Packed SIMD | ? | start | start | start | Nn | |||||
| Zjid | Stable | N | P | Priv HC (Martin Maas) | I/D Consistency | Q1'23 | N/A - Grandfathered | AR approval | start | Spec in slide form, needs to be translated into write-up. | ? | ||||
| Zjpm | Stable | N | P | Priv HC (Martin Maas) | Pointer Masking | Q4'22 | N/A - Grandfathered | AR approval | start | Update needed on waivers for Sail. | ? | ||||
Profiles
| Shcounterenw, Shvstvala, Shtvala, Shvstvecd, Shvsatpa, Shgatpa, Ssstateen, Ssptead, Sstvala, Sstvecd, Sstvecv, Ssu64xl, Svbare, Za128rs, Za64rs, Ziccamoa, Ziccif, Zicclsm, Ziccrse, Zic64b | Public Review Started | N | U | TSC (Krste/Greg) | Profiles TG | Q4'22 | complete | complete | public review complete | Public review ends 12/9. | Yy | |||
| RV32E/RV64E | Public Review Complete | Y | U | Unpriv HC (krste) | N/A | Q3'22 | Q4'22 | N/A | complete | committee chair approval | Nn | ||||
| Smrnmi | Plan Complete | Y | P | Priv HC (Krste/Greg) | N/A | Q1'23 | N/A | acceptance criteria complete | start | Nn | |||||
| Misc. basic Scalar FP | Zfa | Plan Complete | Y | U | Unpriv HC (Andrew Waterman) | N/A | Q4'22 | Q1'23 | N/A | acceptance criteria complete | start | Yy | |||
Shadow Stacks and Landing Pads
| Zisslpcfi | Plan Complete | N | U + P | (George, Ved) | SS-LP-CFI | Q4'22 | Q3'23 | Q3'23 | Complete | start | start | n | ||
| Sspmp | New | N | P | Security HC (Dong Du) | S-Mode Physical Memory Protection | Q4'22 | TBD | N/A | N/A | N/A | n | ||||
Total Store Ordering
| Ztso | Public Review Complete | Y | U | Unpriv HC (Earl Killian) | N/A | Q3'22 | Q4'22 | N/A | complete | TSC approval | ? | |||
Vector Crypto
| Zvkb, Zvkg, Zvknha, Zvknhb, Zvkns, Zvksed, Zvksh | Stable | N | U | Unpriv HC | Cryptographic Extensions | Q4'22 | Q1'23 | Complete | AR Approval | start | SAIL & ACT Waiver | Yy | ||
Vector Crypto - all-rounds AES
| Zvknf | Stable | N | U | Unpriv HC | Cryptographic Extensions | TBD | Complete | AR Approval | start | SAIL & ACT Waiver | Nn | |||
Vector IEEE FP16 Min Support, Arithmetic | Zvfh, Zvfhmin | Stable | Y | U | Unpriv HC (Krste) | N/A | Q4'22 | N/A | committee chair approval | start | Blanket waiver | Yy |
In-process Non-ISA Specifications
Specification
| Specification State**** | Committee (Owner) | Task Group | Plan Milestone Target Date | Freeze Milestone Target Date | Ratification Milestone Target Date | Plan Milestone next step* | Freeze Milestone next step** | Ratification *** | Last Updated | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|
ACPI
| New | Software HC (Sunil VL) | Q2'22 | review by chairs | |||||||
Application Processor-Trusted Execution Environment (AP-TEE)
| New | Security HC (Suresh Sugumar, Ravi Sahita) | AP-TEE | review by chairs | |||||||
Architectural Test Requirements
| New | ISA Infrastructure HC | Architecture Test SIG?? | review by chairs | |||||||
IOMMU
| Plan Complete | SOC Infrastructure HC (Ved Shanbhogue, Perrine Peresse) | IOMMU | Q1'23 | complete | AR approval | |||||
IOPMP | New | Security HC | IOPMP | Q1'23 | review by chairs | ||||||
Nexus Trace (control)
| New | SOC Infrastructure HC (Robert Chylla) | Nexus Trace | review by chairs | |||||||
Platforms
| New | review by chairs | |||||||||
PLIC
| Public Review Complete | Privileged Software HC (Abner Chang) | Q3'22 | Q4'22 | complete | complete | AR approval |
| |||
Security Model
| New | Security HC (Suresh Sugumar, Ravi Sahita) | Security Model | plan review by chairs | |||||||
Unified Discovery (Config)
| New | Privileged Software HC (Irma Flores-Mendoza | Unified Discovery | Q3'22 | plan review by chairs |
| |||||
Watchdog Timer
| New | Privileged Software HC | plan review by chairs | ||||||||
| Cache and Memory Controller QoS Register Interface (CMQRI) | New | SOC Infrastructure HC (Eric Shiu, Ambika Krishnamoorthy) | CMQRI | plan review by chairs |
|
...
Ratified
2022
ISA Specifications
Ratification Package (Extension names)
| Extension(s) | Fast Track | Priv / Unpriv | Committee (Owner) | Task Group | Plan Milestone Target Date | Freeze Milestone Target Date | Ratification Milestone Target Date | Plan Milestone Status* | Freeze Milestone Status** | Ratification Milestone Status*** | Last Updated | Notes | In RVA2023 profile as mandatory or supported optional |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Multiply without Divide (Zmmul) | Y | U | Unpriv HC (Allen Baum) | Q1'22 | Q2'22 | N/A | Freeze Complete | Ratification Complete | Unified Discovery Waiver | |||||
| Zawrs | Y | U | Unpriv HC | N/A | Q2'22 | Q3'22 | N/A | complete | complete | 11/7/22 |
| y |
Non-ISA Specifications
Specification
| Committee (Owner) | Task Group | Plan Milestone Target Date | Freeze Milestone Target Date | Ratification Milestone Target Date | Plan Milestone Status* | Freeze Milestone Status** | Ratification Milestone Status*** | Last Updated | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
Efficient Trace (E-Trace)
| SOC Infrastructure HC | Q2'22 | Plan Complete | Freeze Complete | Ratification Complete |
| ||||
psABI
| Privileged Software HC | psABI | Q2'22 | Q3'22 | complete | complete | complete | 11/7/22 | No waivers | |
Supervisor Binary Interface (SBI)
| Software HC | Q2'22 | Plan Complete | Freeze Complete | Ratification Complete | No waivers | ||||
UEFI Protocol
| Software HC (Sunil VL) | Q2'22 | Plan Complete | Freeze Complete | Ratification Complete | No waivers |
...
Overview
Content Tools