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Explore the intricacies of SEV SNP live migration support in this 31-minute KVM Forum talk. Dive into the concept of a migration helper running as a mirror VM, utilizing existing KVM APIs to copy KVM context and populate NPT page tables during page faults. Learn about the mirror VM's role in dirty page tracking and finalizing live migration. Examine the design considerations for guest_memfd APIs, including post-copy use cases for separate memory views. Gain insights into the guest_memfd and mirror VM design for SEV-SNP live migration, presented by Tom Lendacky, a Linux OS expert from Advanced Micro Devices, and Pankaj Gupta, a member of AMD's Confidential Compute team with extensive experience in Linux kernel and virtualization.
