https://github.com/riscv/riscv-cheri

This repository contains the CHERI extension specification, adding hardware capabilities to RISC-V ISA to enable fine-grained memory protection and scalable compartmentalization.
https://github.com/riscv/riscv-cheri

capabilities compartmentalization memory-safety

Last synced: about 1 month ago
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This repository contains the CHERI extension specification, adding hardware capabilities to RISC-V ISA to enable fine-grained memory protection and scalable compartmentalization.

• Host: GitHub
• URL: https://github.com/riscv/riscv-cheri
• Owner: riscv
• License: cc-by-4.0
• Created: 2024-01-05T21:33:43.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2026-05-12T14:17:53.000Z (about 1 month ago)
• Last Synced: 2026-05-12T15:38:40.230Z (about 1 month ago)
• Topics: capabilities, compartmentalization, memory-safety
• Language: TeX
• Homepage: https://riscv.atlassian.net/browse/RVG-148
• Size: 37.5 MB
• Stars: 108
• Watchers: 21
• Forks: 49
• Open Issues: 38
• Metadata Files:
  • Readme: README.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE

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README

          
# RISC-V Instruction Set Manual

[![RISC-V ISA Build](https://github.com/riscv/riscv-isa-manual/actions/workflows/isa-build.yml/badge.svg)](https://github.com/riscv/riscv-isa-manual/actions/workflows/isa-build.yml)

This repository contains the source files for the RISC-V Instruction Set Manual, which consists of the Unprivileged and Privileged volumes. The preface of each document indicates the version of each standard that has been formally ratified by RISC-V International.

This work is licensed under a [Creative Commons Attribution 4.0 International License](https://creativecommons.org/licenses/by/4.0/). See the [LICENSE](LICENSE) file for details.

The RISC-V Instruction Set Manual is organized into the following volumes:

- Volume I: Unprivileged Architecture

- Volume II: Privileged Architecture

## Official and Draft Versions

- **Compiled versions of the most recent drafts** of the specifications can be found on the [GitHub releases page](https://github.com/riscv/riscv-cheri/releases/latest).

- **HTML snapshots of the latest commit** can be viewed at the following locations:

  - [Standalone CHERI specification](https://riscv.github.io/riscv-cheri/)

  - [Standalone CHERI specification with additional non-frozen chapters](https://riscv.github.io/riscv-cheri/snapshot/riscv-cheri-full/)

  - [Unprivileged spec](https://riscv.github.io/riscv-cheri/snapshot/unprivileged/)

  - [Privileged spec](https://riscv.github.io/riscv-cheri/snapshot/privileged/)

## Contributing

If you would like to contribute to this documentation, please refer to the [Documentation Developer's Guide](https://github.com/riscv/docs-dev-guide).

The recommended method for building the PDF files is to use the Docker Image, as described in the [RISC-V Docs Base Container Image repository](https://github.com/riscv/riscv-docs-base-container-image).

Alternative build methods, such as local builds and GitHub Action builds, are also available and described in the Documentation Developer's Guide.

## Images not rendered for EPUB files

If the eBook reader does not support embedded images, uncomment `:data-uri:` lines in `src/riscv-privileged.adoc` and `src/riscv-unprivileged.adoc`.

### Known devices that cannot handle embedded images

- PocketBook InkPad 3

## Repo Activity

![Alt](https://repobeats.axiom.co/api/embed/ccec87dc4502f2ed7c216b670b5ed8efc33a1d4c.svg "Repobeats analytics image")