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Explore the challenges and solutions for implementing reliable timekeeping in COCONUT-SVSM through this 25-minute conference talk from KVM Forum. Learn about the current limitations of COCONUT-SVSM's timer infrastructure and understand why reliable, monotonic timer sources are crucial for supporting trusted services. Discover how the TSC (Time Stamp Counter) serves as the only trusted time source in SEV-SNP guests, while examining the complications that arise from spread spectrum clocking causing frequency deviations from the nominal P0 frequency. Understand how these small deviations can accumulate into significant clock drift over extended periods. Examine the proposed addition of SecureTSC support to COCONUT-SVSM as a foundation for safe timer operations, and explore the integration of KVM clock mechanisms to enhance timing accuracy. Engage with technical discussions on best practices for ensuring reliable timekeeping in SVSM environments, making this essential viewing for developers and system architects working with secure virtualization technologies.
