pw_kernel#
An experimental kernel for embedded systems
Experimental Rust Code Size Impact: ~10-16 kB
Note
This is an early draft. The content may change significantly over the next few months.
The Pigweed Kernel (pw_kernel) is an experimental, Rust-based
kernel for embedded systems. It prioritizes memory safety,
flexible security models, and a modern developer experience.
Rust foundation: Leverages Rust’s safety and concurrency features for a robust core.
Security-focused: Offers adaptable security, from MPU/PMP-protected modes for process isolation to lightweight, no-protection modes for resource-constrained environments.
Scalable & interoperable: Works across various system sizes with strong C++ and Rust compatibility.
Test-driven development: Emphasizes comprehensive unit testing for all core primitives to ensure reliability.
Warning
pw_kernel is currently experimental. APIs are subject to change.
Who is this for?
pw_kernel is an exciting choice if you’re looking to build on a modern,
Rust-based RTOS and are comfortable working with experimental software.
It’s particularly well-suited for:
Projects exploring the benefits of Rust (memory safety, concurrency) in an embedded kernel context.
Developers interested in contributing to or influencing the direction of a new, security-conscious kernel.
Systems where C++ and Rust interoperability at the kernel-userspace boundary is a key requirement.
Teams looking for a kernel with a strong emphasis on testability and a path towards a verifiable TCB.
However, as an experimental project, it is not yet suitable for:
Projects requiring a fully mature, production-hardened kernel with an extensive set of stable features and broad, long-term support guarantees.
Systems needing immediate access to a rich ecosystem of device drivers or advanced, fully-vetted memory protection schemes, as these are still under active development.