AMP Virtio: A New Virto Transport for AMP Systems, with Focus on Zephyr, Linux, and Xen - Bill Mills

AMP Virtio: A New Virto Transport for AMP Systems, with Focus on Zephyr, Linux, and Xen - Bill Mills, Linaro

Asymmetric multiprocessing systems are common in automotive, Industrial, and mobile markets and are entering the data center market as well. The OpenAMP project strives to make AMP systems easier and more standards based. The OpenAMP project is working on a new Virtio transport layer that can be used between cores that do not share a hypervisor. Example systems include: * AMP SOCs running running Linux on Cortex-A and Zephyr on Cortex-M, * x86 and Arm systems connected via PCIe, both running Linux. AMP Virtio can also be used in Xen and other hypervisors to reduce worse case latency and increase freedom of interference (FFI). These aspects are critical in real-time and functionally safe systems. This presentation will cover: * Why Virtio for AMP systems * What are the problems with the existing virtio transports for AMP systems * Outline of the transport proposal * Prototype software for Zephyr, Linux, and Xen * Show various topologies and use cases for Device and Driver placement * Show portability to other RTOSes and hypervisors.