Feature

This document describes how to deploy and enable the vKAE passthrough live migration feature in virtualization scenarios on a Kunpeng server running the openEuler OS, and how to perform related function and performance tests.

VM live migration is an important O&M method, allowing a VM to be migrated from one physical host to another without interrupting the VM running. KAE passthrough live migration specifically addresses the scenario where VMs are configured with KAE passthrough devices, offering enhanced operational flexibility and continuous service availability. The current live migration with passthrough devices relies on device-specific DMA dirty page marking, which many passthrough devices lack, limiting migration capabilities. The SMMU of the new Kunpeng 920 processor model introduces dirty page marking based on Hardware Translation Table Update (HTTU). By combining this hardware feature with an optimized software framework, robust passthrough device migration support is implemented, significantly strengthening competitiveness of Kunpeng virtualization.