RISC-V International
The RISC-V specification process is governed by the Ratification Policy and more concisely articulated in the Specification Lifecycle and Milestone Definitions presentation. To help Task Group Chairs, Vice-chairs, and specification authors navigate this process, the RISC-V Lifecycle Guide has a whole section on "Specification Lifecycle" with an introductory section describing the process and subsections for each milestone that include step-by-step descriptions of the process.
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. The chairs and vice-chairs of Task Groups, specification authors, and Horizontal and ISA Committee chairs and vice-chairs jointly own ensuring their specifications are listed below and reflect accurate status.
In-process specifications are grouped below into two tables based on whether they impact the RISC-V ISA (In-process ISA Specifications) or not (In-process Non-ISA Specifications). Items should have links to their respective specification repo ( ), Ratification Plan( ) if not a Fast-track item, and an Acceptance Criteria Status checklist ( ).
Status of active votes by TSC and Committee Chairs can be found on the RISC-V Vote Status wiki page.
Completed specifications are tracked at the bottom of the page.
This dashboard does NOT intend to showed details status (that's available in the status checklist for the specification,
), but rather the general status in the journey to ratification.NOTE: This page is managed by the RISC-V staff with assistance from each specification owner. To get updates to this page or for questions, contact help@riscv.org.
Ratification Package
| extensions included | Task group approved by TSC date or Fast Track approved by AR date | Specification State**** | ISA AR 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Zacas |
| New | Queued | Y | U | Unpriv IC (Ved, Greg) | N/A | Q2'23 | Q3'23 | Q4'23 | review by chairs | ||||||
Smaia, Ssaia |
| Public Review Complete | Approved | N | P | Priv IC (John Hauser, Anup Patel) | AIA | 1Q'22 | Q4'22 | Q2'23 | complete | complete | committee chair approval |
| y | ||
Zfbfmin, Zvfbfmin, Zvfbfwma | Plan Complete | Reviewing | Y | U | (Ken Dockser) | N/A | N/A | Q2'23 | N/A | AR approval |
| Submitted to AR | |||||
Ssqosid |
| Plan Complete | Queued | N | P | SOC Infrastructure HC (Eric Shiu, Ambika Krishnamoorthy) | CBQRI | 4Q'22 | Q2'23 | Q3'23 | complete | AR approval |
| Submitted to AR | |||
Zicond |
| Public Review Started | Approved | Y | U | Unpriv IC | N/A | Q1'23 | Q1'23 | Q2'23 | complete | complete | public review complete | Public Review ends May 21. | |||
Zxmctr |
| New | Development | N | P | (Beeman Strong) | CTR TG | Q2'23 | Q3'23 | Q4'23 | review by chairs | ||||||
Smcntrpmf | Plan Complete | Queued | Y | U | Priv IC (Beeman Strong) | N/A | Q1'23 | Q2'23 | Q3'23 | review by chairs | Plan milestone review 2/22/2023 | ||||||
Sdext, Sdtrig | 2020 | Plan Complete | Development | N | P | Priv IC (Tim Newsome) | Debug TG | Q1'23 | Q2'23 | Q3'23 | complete | acceptance criteria complete | start | Waiver vote for SAIL and ACT | n | ||
Smclic, Ssclic, Suclic, Smclicshv, Smclicconfig | 2020 | Plan Complete | Development | N | P | Priv IC (Dan Smathers) | Fast Interrupts | N/A | Q3'23 | N/A | spec development - stable | start | n | ||||
Svadu |
| Plan Complete | Approved | Y | P | Priv IC (Aaron Durbin) | N/A | N/A | Q2'23 | Q3'23 | N/A | acceptance criteria complete | start | Need updated target dates and Status Checklist updates from Aaron | |||
Zjid | 2020 | Stable | Development | N | P | Priv IC (Martin Maas) | I/D Consistency | N/A | Q2'23 | N/A - Grandfathered | AR approval | start | Spec in slide form, needs to be translated into write-up. | ? | |||
Zimop |
| Plan Complete | Development | Y | U | Unpriv IC (Andrew Waterman) | N/A | N/A | Q2'23 | N/A | AR approval | start |
| n | |||
Zihintntl |
| TSC Approved | Approved | Y | U | Priv IC (Andrew Waterman) | N/A | N/A | Q2'23 | N/A | complete | BoD approval | y | ||||
Zbpbo, Zpn, Zpsfoperand, P | 2020 | New | Development | N | U | Unpriv IC (Kevin Chen) | Packed SIMD | Q3'23 | Q4'23 | Q4'23 | start | start | start | Need plan from Kevin Chen | n | ||
Zjpm | 2020 | Stable | Reworking | N | P | Priv IC (Martin Maas) | Pointer Masking | Q1'23 | Q2'23 | complete | AR approval | start | Ongoing discussion with ARC around design. | ? | |||
New | Development | N | P | Priv IC (TBD) | build plan | Awaiting guidance from Greg and Andrew. | y | ||||||||||
Smrnmi |
| Plan Complete | Reviewing | Y | P | Priv IC (Andrew Waterman) | N/A | N/A | Q1'23 | N/A | acceptance criteria complete | start | Status checklist reviewed by Philipp. Work needed. Requested owner from Greg and Andrew (Priv IC). | n | |||
Zfa |
| Public Review Started | Approved | Y | U | Unpriv IC (Andrew Waterman) | N/A | N/A | Q2'23 | Q3'23 | N/A | Complete | public review complete | Public review ends June 2 | y | ||
Zisslpcfi |
| Plan Complete | Queued | N | U + P | (George, Ved) | SS-LP-CFI | Q4'22 | Q3'23 | Q3'23 | Complete | AR approval | start | Submitted to AR | n | ||
Sscdeleg, Smcdeleg |
| Stable | Queued | Y | P | Priv IC (Beeman Strong) | N/A (Fast Track) | Q1'23 | Q2'23 | Q3'23 | Complete |
|
| ||||
Sspmp |
| Plan Complete | Development | N | P | Security HC (Dong Du) | S-Mode Physical Memory Protection | Q1'23 | Q3'23 | Q4'23 | Complete | Start | N/A | Plan Milestone review 2/15 | n | ||
Zvbb, Zvbc, Zvkg, Zvkn, Zvkng, Zvkned, Zvknh, Zvks, Zvksg, Zvksed, Zvksh, Zvkt |
| Stable | Reviewing | N | U | Unpriv IC | Cryptographic Extensions | 3Q'22 | Q2'23 | Q2'23 | Complete | AR Approval | start | SAIL & ACT Waiver | y | ||
Zvknf |
| Stable | Development | N | U | Unpriv IC | Cryptographic Extensions | 3Q'22 | TBD | YE2024 | Complete | AR Approval | start | No owner to drive work. | n | ||
Zvfh, Zvfhmin |
| Public Review Complete | Approved | Y | U | Unpriv IC (Krste) | N/A | N/A | Q4'22 | Q2'23 | N/A | complete | TSC approval | Blanket waiver Public review completed 3/10. | y |
Ratification Package
| Task group approved by TSC date | 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
New | Privileged Software HC (Atish Patra & Sunil VL) | Platform Runtime Services | Q2'23 | build plan | ||||||||
AP-TEE-IO | Security HC | AP-TEE-IO | ||||||||||
2020 | New | ISA Infrastructure HC | Architecture Test SIG | review by chairs |
| Need to identify the track of approvals and discussion given it was started back in 2018. | ||||||
| New | Security HC (Ravi Sahita, Guerney Hunt) | AP-TEE | Q1'23 | Q3'23 | Q4'23 | review by chairs | Chair review complete, being reviewed by IC chairs next | ||||
| Public Review Complete | SOC Infrastructure HC (Ved Shanbhogue, Perrine Peresse) | IOMMU | 2Q'22 | Q1'23 | complete | complete | committee chair approval | Approval ends May 12. | |||
| New | Security HC | IOPMP | Q3'23 | Q3'23 | Q4'23 | review by chairs | First Plan Milestone presentation on May 10, with follow-up requested for June. | ||||
| Plan Complete | SOC Infrastructure HC (Robert Chyla) | Nexus Trace | Q1'23 | Q2'23 | Q3'23 | complete | AR approval | ||||
| New | Privileged Software HC (Aaron Durbin) | OS-A SEE | Q2'23 | build plan |
| ||||||
| New | SOC Infrastructure HC (Dimitris Gizopoulos, Cameron McNairy) | RAS Terms and Defintions | build plan | ||||||||
| Plan Complete | Applications & Tools HC | RISC-V Vector C Intrinsics | complete | spec development - stable | |||||||
New | Privileged Software HC (Atish Patra & Sunil VL) | Platform Runtime Services | Q2'23 | plan review by chairs | ||||||||
| New | Security HC (Paul Elliot, Xueyang "Terry" Wang) | Security Model | plan review by chairs | ||||||||
| New | Privileged Software HC (Irma Flores-Mendoza | Unified Discovery | Q3'22 | plan review by chairs |
|
The following steps and associated next sequential steps for the milestones listed in the tables above may be parallelized at times, but are most simply thought of as a sequential set. All previous steps are done. For more details on each step, see the RISC-V Lifecycle Guide section on "Specification Lifecycle" and it's specific subsections for each milestone, including step-by-step descriptions.
The usable Milestone next Steps are as follows:
* Plan Milestone next Steps:
** Freeze Milestone next step:
*** Ratification Milestone next step (don't start until freeze is complete):
++ ISA AR State (owner)
NOTE: Some Milestone next steps may be marked as "N/A" for "Not Applicable" with an explanation after a trailing "-". For example, "N/A - Grandfathered" means that the step was skipped due to the fact that the process changed after the step would have been completed and it has been "Grandfathered" in (meaning accepted as N/A) as acceptable.
**** Specification State values:
ISA Specifications
Ratification Package
| extensions included | Task group approved by TSC date | Specification State**** | ISA AR 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Zca, Zcb, Zcd, Zce, Zcf, Zcmp, Zcmt | 2021 | Ratified | Approved | N | U | (Tariq Kurd) | Code Size Reduction | N/A | Q1'23 | Q2'23 | N/A | complete | complete | y (Zcb only) | |||
Zicntr, Zihpm |
| Ratified | Approved | Y | U | Unpriv IC (Earl Killian) | N/A | N/A | Q4'22 | Q1'23 | N/A | complete | complete | y | |||
Shcounterenw, Shvstvala, Shtvala, Shvstvecd, Shvsatpa, Shgatpa, Sscounterenw, Ssstateen, Sstvala, Sstvecd, Sstvecv, Ssu64xl, Svade, Svbare, Za128rs, Za64rs, Ziccamoa, Ziccif, Zicclsm, Ziccrse, Zic64b |
| Ratified | Approved | N | U | TSC (Krste/Greg) | Profiles TG | Q2'22 | Q4'22 | Q1'23 | complete | complete | complete | y | |||
RV32E/RV64E |
| Ratified | Y | U | Unpriv IC (krste) | N/A | N/A | Q3'22 | Q4'22 | N/A | complete | complete | n | ||||
Ztso |
| Ratified | Y | U | Unpriv IC (Earl Killian) | N/A | N/A | Q3'22 | Q4'22 | N/A | complete | complete | ? |
Non-ISA Specifications
Ratification Package
| Task group approved by TSC date | 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020 | Ratified | Privileged Software HC (Abner Chang) | Q3'22 | Q4'22 | complete | complete | complete | No waivers |
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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 |
---|---|---|---|---|---|---|---|---|---|---|
SOC Infrastructure HC | Q2'22 | Plan Complete | Freeze Complete | Ratification Complete |
| |||||
Privileged Software HC | psABI | Q2'22 | Q3'22 | complete | complete | complete | 11/7/22 | No waivers | ||
Privileged Software HC | Q2'22 | Plan Complete | Freeze Complete | Ratification Complete | No waivers | |||||
Privileged Software HC (Sunil VL) | Q2'22 | Plan Complete | Freeze Complete | Ratification Complete | No waivers |
Ratification Package | Fast Track | Priv Unpriv | Extension Names | Owner | Arch Review | Status Checklist | Public Review |
Vector | N | U | V, Zve32x, Zve32f, Zve64x, Zve64f, Zve64d | Krste | Complete | Complete | Y |
Bit-Manipulation | N | U | Zba, Zbb, Zbc, Zbs | Ken / Krste | Complete | Complete | Y |
FP in INT regs | N | U | Zfinx | Tariq | Complete | Complete | Y |
Half Width FP | Y | U | Zfh, Zfhmin | Andrew | Complete | Complete | Y |
ePMP | N | P | Smepmp | Nick | Complete | Complete | Y |
Crypto Scalar | N | U | Zbkb, Zbkc, Zbkx, Zknd, Zkne, Zknh, Zksed, Zksh, Zkn, Zks, Zkt, Zk, Zkr | Ben | Complete | Complete | Y |
Priv 1.12 | N | P | Sm1p12, Ss1p12, Sv57 | Greg | Complete | Complete | Y |
CMO base | N | P | Zicbom, Zicbop, Zicboz | DavidK | Complete | Complete | Y |
hypervisor | N | P | H | JohnH | Complete | Complete | Y |
state enable | Y | P | Smstateen | JohnH | Complete | Complete | Y |
time cmp | Y | P | Sstc | Greg | Complete | Complete | Y |
Count overflow & Filtering | Y | P | Sscofpmf | Greg | Complete | Complete | Y |
Fast TLB invalidation | N | P | Svinval | Dan | Complete | Complete | Y |
NAPOT pages | N | P | Svnapot | Dan | Complete | Complete | Y |
Page-based memory types | N | P | Svpbmt | Dan | Complete | Complete | Y |
Pause Hint | Y | U | Zihintpause | Greg | Complete | Complete | Y |