OSS + ELC EU 2026

Linux-based Xen Driver Domains are powerful, but they increase the trusted computing base and add complexity to systems that need tight isolation, fast startup, and auditable software components.

This talk updates the Zephyr-based VIRTIO backend for Xen, an effort to run selected VIRTIO backend functions in small, purpose-built Zephyr driver domains. The goal is to preserve Xen’s proven architecture while enabling a finer-grained model: separate lightweight domains for network, storage, or platform-specific services.

Over the past half year, the project has moved toward platform integration. Upstreaming work has progressed, real-hardware demos are being developed on Renesas R-Car V4H, and integration with SoDeV, an SDV platform by Automotive Grade Linux, is underway.

The session will cover the architecture, current upstream status, and obstacles to using it across platforms. Attendees will leave with a realistic view of where Zephyr-based driver domains can reduce the trusted computing base, what challenges remain, and how to contribute to lightweight open-source driver domains for edge and automotive systems.