Xen Summit 2026

In recent years, GPU para-virtualization on Xen has evolved to support increasingly complex automotive workloads. While prior work focused on graphics and compute virtualization, display para-virtualization introduces new challenges due to its interaction with hardware composition pipelines and real-time requirements. In this session, Ray presents his team’s latest work on display para-virtualization, focusing on Multi-Plane Overlay (MPO) virtualization and the Virtual Primary Plane (vPP). These mechanisms extend the VirtIO GPU model to enable guest VMs to utilize host display hardware. He explains how MPO virtualization exposes multiple display planes to guest VMs, allowing composition to be offloaded to hardware. The vPP abstraction provides a stable primary display surface, decoupling guest behavior from host specifics. He also discusses GPU recovery integration and outlines validation approaches and future directions.