Live Control of CPU Features via Hybrid vCPU Model

Explore the concept of hybrid vCPU models in virtualization technology through this 28-minute KVM Forum conference talk. Delve into the challenges of VM migration between hosts with different CPU models and learn about a solution that enables guests to support hybrid vCPU models. Discover how this approach allows VMs to utilize new CPU features on upgraded hosts without requiring a reboot, benefiting always-on cloud services. Examine the growing support for hybrid CPU architectures across various vendors and its implications for kernel enhancements. Investigate the potential of hybrid VMs in cloud environments, including the ability to leverage guest CPU hot-plugging frameworks for live switchovers between CPU models. Gain insights into the minimal software stack changes required to implement live control of most CPU features and understand potential roadblocks in the process.