QEMU Arm CPU Models and KVM for Guest Migration

Explore the intricacies of QEMU Arm CPU models and KVM in this 31-minute conference talk from KVM Forum. Delve into the challenges of moving KVM guests between different hosts, focusing on the reliance on CPU models for compatibility. Examine the current landscape where Arm offers various emulated CPU models with TCG, while KVM primarily supports the 'host' CPU model, which lacks migration safety. Investigate the requirements for supporting vCPUs with feature sets that are subsets of the host's capabilities. Learn about potential solutions involving flexible CPU models compatible with different accelerators, aiming to enhance migration capabilities and overall system flexibility.