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.

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In-process ISA Specifications

Ratification

Package (Extension names)

Package  Image Modified: Project repo Image Modified: Plan doc Image Modified: Status chklist	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

Status

Next Step*	Freeze Milestone

Status

Next Step**	Ratification Milestone

Status

Next Step***

Notes /

Last Updated	Notes	In RVA2023 profile as mandatory or supported optional
Advanced Interrupt Architecture (AIA) Image Modified Image Modified Image Modified	Smaia, Ssaia	Public Review Started	N	P	Priv HC (John Hauser, Anup Patel)

Q3

AIA

Q4'22

Plan Complete

Freeze Arch Review Complete

Waivers Requested

Q1'23

complete

complete

public review complete

09 Nov 2022

Blanket waivers Public review ends Dec. 24

08/22

	y
Code Size Reduction

(Zc*)

Image ModifiedImage ModifiedImage Modified

Zca, Zcb, Zcd, Zcf, Zcmp, Zcmt

Frozen

N

U

Code Size Reduction Task Group

Unpriv HC (Tariq Kurd)

Code Size Reduction

Q3

	Q4'22	Q1'23	grandfathered	complete	send out for public review	07 Nov 2022	SAIL/ACT Waivers ABI issues being worked	n
Conditional Ops Image AddedImage Added	Zicondops	New	Y	U	Unpriv HC (Ved)	N/A

- GrandfatheredFreeze Arch Review
Complete 09/22

Q1'23

09 Nov 2022

n

Debug Image Modified Image Modified Image Modified		New	N	P

Debug TG

Priv HC (Tim Newsom)

Debug TG

Q2'23

Plan Development

review by chairs

acceptance criteria complete

start

27 Oct 2022

08/22

		n
Fast Interrupt

(CLIC)

Image Modified Image Modified Image Modified

Smclic

Plan Complete

N

P

Priv HC (Dan Smathers)

Fast Interrupts

Q1'23

N/A

spec development - stable

start

?

n

Hardware Updating of PTE A/D Bits  Image AddedImage Added

Svadu

Plan  Complete

Y

P

Priv HC (Ved)

N/A

Q4'22

Plan DevelopmentFreeze Arch Review Requested08/22n

Q1'23	N/A	acceptance criteria complete	start	11 Oct 2022
Counters Image Added	Zicntr, Zihpm	Public Review Started

HpmCounter enhancements (Zicntr, Zihpm)Image Removed

Y

U

Unpriv HC (

TBD)Q3

Earl Killian)

N/A

Q4'22

N/A

Freeze Arch Review Complete

committee chair approval

public review complete

08 Nov 2022

Review ends Dec. 23

08/22

	y
"May Be Ops" (for CFI, etc.)

(

Zimops

)

Stable

Y

U

Unpriv HC (Andrew Waterman)

N/A

Q3

Q1'

22

23

N/A

Pending RVI Review

AR approval

start

09 Nov 2022

Arch Review In Process

	08/22. need github spec	n
Non Temporal Locality Hint

(Zihintntl)

Image Added

Zihintntl

Plan  Complete

Y

P

Priv HC (Andrew Waterman)

N/A

Q3

Q1'

22

23

N/A

Freeze Arch Review Complete

acceptance criteria complete

start

09 Nov 2022

Update needed.

08/22

	y
Packed SIMD

(

Image Added

Zbpbo, Zpn, Zpsfoperand,

Zprvsfextra)

P

Image Removed

New

N

U

Unpriv HC (Kevin Chen)

Q4'22

Packed SIMD		?		start	start	start	11 Oct 2022		n
Instruction/Data Consistency Image Added	Zjid	Stable	N	P	Priv HC (Martin Maas)	I/D Consistency		Q1'23		N/A - Grandfathered

Freeze Arch Review Requested08/22n

Pointer masking (Zjpm)

Image RemovedImage Removed

	AR approval	start	07 Nov 2022	Spec in slide form, needs to be translated into write-up.	?
Pointer masking Image AddedImage Added	Zjpm	Stable	N	P	Priv HC (Martin Maas)	Pointer Masking		Q4'22		N/A - Grandfathered

Freeze Arch Review Requested

AR approval

start

11 Oct 2022

Update needed on waivers for Sail.

9/1

	?
Profiles Image Modified Image Modified Image Modified	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

Profiles TG

TSC (Krste/Greg)

06/25/22

Internal Review Complete 6/7

TSC Review Complete 6/21

Plan CompleteFreeze Complete 

09/01

y

	Profiles TG		Q4'22		complete	complete	public review complete	26 Oct 2022	Public review ends 12/9.	y
Reduced integer bases  Image AddedImage Added	RV32E/RV64E	Public Review Complete

Quality of Service ID (QID)
Image Removed

YP

Priv HC

(Ved Shanbhogue)

Q3'22Q4'22N/A08/22n

Reduced integer bases (RV32E/RV64E)

Image RemovedImage Removed

Y

U

Unpriv HC (

???)

krste)

N/A

Q3'22

Q4'22

N/A

Freeze Arch Review Complete

complete

committee chair approval

27 Oct 2022

Public review ends Oct 6 (updated: 08/22)

		n
Resumable Non-maskable Interrupts

(

Image Added

Smrnmi

)Image Removed

Plan  Complete

Y

P

Priv HC (Krste/Greg)

Q4'22

N/A

Q1'23

N/A

Freeze Arch Review Almost Complete

acceptance criteria complete

start

09 Nov 2022

08/22

		n
Misc. basic Scalar FP

(

Zfa

)

Plan  Complete

Y

U

Unpriv HC (Andrew Waterman)

Q3

N/A

Q4'22

Q1'23

N/A

Freeze Arch Review In Process08/22y

Total Store Ordering (Ztso)

Image Removed

YUUnpriv HC
(Earl Killian)

acceptance criteria complete	start	09 Nov 2022		y
Shadow Stacks and Landing Pads Image AddedImage Added Image Added	Zisslpcfi	Plan  Complete	N	U + P	Unpriv HC + Priv HC (George, Ved)	SS-LP-CFI	Q4

Q2

'22

Q3'

22N/A

Freeze  Complete

Public Review In ProcessReview ends 3 Oct. (updated: 08/22)?

23

Q3'23

Complete

start

start

09 Nov 2022

n

S-mode PMP Image Added Image Added Image Added

Sspmp

New

N

P

Security HC (Dong Du)

S-Mode Physical Memory Protection

Q4'22

TBD

N/A

N/A

N/A

11 Nov 2022

n

Total Store Ordering Image Added

Ztso

Public Review Complete

Vector Crypto (Zvk)

Image Removed Image Removed Image Removed

NU

Cryptographic Extensions Task Group
(Ken Dockser)

Plan Complete08/22yVector IEEE FP16 Min Support (Zvfmin)

Y

U

Unpriv HC (

Andrew Waterman)

Earl Killian)

N/A

Q3'22

Q4'22

N/A

Freeze Arch Review Requested08/22yVector IEEE FP16 Arithmetic (Zvf)

	complete	TSC approval	14 Nov 2022		?
Vector Crypto Image Added Image Added Image Added	Zvkb, Zvkg, Zvknha, Zvknhb, Zvkns,  Zvksed, Zvksh	Stable	N

Y

U

Unpriv HC (

Andrew Waterman)

Ken Dockser)

Cryptographic Extensions

Q4'22

N/AFreeze Arch Review RequestedUpdated: 09/14y

Wait on Reservation Set (Zawrs)

Image Removed Image Removed

Q1'23

Complete

AR Approval

start

09 Nov 2022

SAIL & ACT Waiver

y

Vector Crypto - all-rounds AES Image Added

Zvknf

Stable

N

U

Unpriv HC (Ken Dockser)

Cryptographic Extensions

TBD

Complete

AR Approval

start

09 Nov 2022

SAIL & ACT Waiver

n

Vector IEEE FP16 Min Support, Arithmetic Image Added

Zvfh, Zvfhmin

Stable

Y

U

Unpriv HC (

Ved Shanbhogue

Krste)

Q2'22

N/A

Q4

Q3

'22

N/A

Freeze Complete

TSC Sign-Off Voting

committee chair approval

start

09 Nov 2022

Blanket waiver

Updated: 09/22

y

In-process Non-ISA Specifications

Status Key

The following steps and associated states 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. They are as follows:

* Plan Milestone Status next Steps:

1. start
2. review by chairs
3. complete (nothing else to do)Plan Development → Plan Review Requested → Plan Complete

** Freeze Milestone Status Stepsnext step:

1. Specification Development → Specification Stable
2. Freeze Arch Review Requested → Freeze Arch Review In Process → Freeze Arch Review Complete
3. Waivers Requested → Waiver Voting → Waivers Approved
4. Committee Chair Sign-Off Requested → Committee Chair Sign-Off Voting → Committee Chair Sign-Off Complete →
5. Freeze Complete

*** Ratification Milestone Status Steps:

1. start
2. spec development - stable
3. AR approval (ISA/SW AR)
4. acceptance criteria complete (including waivers, ar approval)
5. committee chair approval
6. freeze
7. complete (nothing else to do)

*** Ratification Milestone next step (don't start until freeze is complete):

1. start
2. send out for public review
3. public review complete
4. acceptance criteria complete 
5. committee chair approval
6. TSC approval
7. BOD approval
8. ratified
9. complete (nothing else to do)

**** Specification State values:

1. New
2. Plan Complete
3. Stable
4. Frozen
5. Public Review Started
6. Public Review Complete
7. TSC Approved
8. Ratified
9. Public Review In Process  → Public Review Complete
10. Final Arch Review Requested → Final Arch Review In Process → Final Arch Review Complete
11. Committee Chair Sign-Off Requested → Committee Chair Sign-Off Voting → Committee Chair Sign-Off Complete
12. TSC Sign-Off Voting → TSC Sign-Off Complete
Ratification (BoD Vote) Voting → Ratification (BoD Vote) Complete

Ratified

2022

ISA Specifications

Non-ISA Specifications

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