KAE Passthrough Live Migration
VM live migration is a critical operational capability that enables seamless transfer of running VMs between physical hosts without service interruption. 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.
Before configuring this feature, learn its specifications, supported version, license requirement, constraints, and application scenarios. For details, see Virtualization Scenario vKAE Passthrough Live Migration Feature Guide.
Version Requirements
- Version: For Arm-based KVM and QEMU virtualization platforms, only libvirt 6.2.0/9.10.0 and QEMU 6.2.0/8.2.0 are supported.
- License: KAE license.
- The application environment must meet the software and hardware environment requirements supported by KAE.
Application Scenarios
KAE passthrough live migration is primarily used in scenarios where VMs leverage KAE passthrough devices for compression, encryption/decryption, and other operations while requiring uninterrupted migration capabilities. This ensures seamless load balancing, hardware maintenance, disaster recovery, and high availability.