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Home of OpenVMM and OpenHCL

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README.md

# OpenVMM

[![Build Status](https://github.com/microsoft/openvmm/actions/workflows/openvmm-ci.yaml/badge.svg?branch=main)](https://github.com/microsoft/openvmm/actions/workflows/openvmm-ci.yaml)

OpenVMM is a modular, cross-platform Virtual Machine Monitor (VMM), written in
Rust.

Although it can function as a traditional VMM, OpenVMM's development is
currently focused on its role in the OpenHCL paravisor.

This repo is the home for both projects.

For more information, read our [guide](https://openvmm.dev/)
or our [introductory blog post](https://techcommunity.microsoft.com/t5/windows-os-platform-blog/openhcl-the-new-open-source-paravisor/ba-p/4273172).

## Getting Started

For info on how to run, build, and use OpenVMM, check out the [The OpenVMM Guide][].

The guide is published out of this repo via [Markdown files](Guide/src/SUMMARY.md).
Please keep them up-to-date.

The maintainers of this project use Discord to collaborate with external contributors and users.
Please [join](https://aka.ms/openvmmdiscord) if you have any questions about contributing to or using OpenVMM/OpenHCL.

[The OpenVMM Guide]: https://aka.ms/openvmmguide

## Contributing

This project welcomes contributions and suggestions.  Most contributions require you to agree to a
Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us
the rights to use your contribution. For details, visit [Contributor License Agreements](https://cla.opensource.microsoft.com).

When you submit a pull request, a CLA bot will automatically determine whether you need to provide
a CLA and decorate the PR appropriately (e.g., status check, comment). Simply follow the instructions
provided by the bot. You will only need to do this once across all repos using our CLA.

This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/).
For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or
contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.

## Trademarks

This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft
trademarks or logos is subject to and must follow
[Microsoft's Trademark & Brand Guidelines](https://www.microsoft.com/legal/intellectualproperty/trademarks/usage/general).
Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship.
Any use of third-party trademarks or logos are subject to those third-party's policies.

Repository info

Default branch: main
Latest version: openvmm-v0.4.0
Created: 02/03/2024
Last activity: 01/11/2026
License: MIT
Open issues: 375
Watchers: 30

Topics

confidential-computing rust vmm

Contributors

jstarks

704 contributions

smalis-msft

668 contributions

tjones60

170 contributions

benhillis

159 contributions

mattkur

131 contributions