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Explore a conference talk presenting an innovative approach to achieving superfast boot times for micro-VMs on arm64 architecture through a minimal EFI reimplementation in Rust. Learn about the challenges of direct kernel booting on arm64 systems, where bypassing firmware results in disabled MMU and caches, creating performance and security issues. Discover how this proposed solution addresses the limitations of traditional EFI implementations that are often avoided due to their reputation for being slow and buggy on x86 systems. Understand the technical details of how this Rust-based EFI implementation integrates tightly with QEMU to boot guest kernels in EFI mode while maintaining full caching and memory protection capabilities from system reset. Examine the advantages this approach offers over non-firmware alternatives, including improved speed, enhanced security, and reduced maintenance overhead. Gain insights into the specific problems posed by accessing ACPI and SMBIOS tables without EFI support and how this solution resolves these challenges for arm64 virtual machine environments.
