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Explore the technical challenges and solutions for running Windows on Arm virtualization through this 28-minute conference talk from KVM Forum. Discover how Microsoft's RTM build of Windows on Arm, while functional with basic TCG configuration, faces significant reliability and functionality issues when running on QEMU/KVM compared to Windows on x64 or Linux on Arm. Learn about critical problems including QEMU and KVM's struggles with Performance Monitoring Unit (PMU) emulation required by Windows, frequent crashes of the virtio-gpu graphics driver essential for high and variable display resolution features, and failures of the SPICE guest agent necessary for clipboard sharing functionality. Understand the comprehensive patches and updates required across the entire virtualization stack to address these issues, and see how these improvements enhance not only the Windows on Arm experience but also benefit Windows guest and Arm virtualization experiences overall. Gain valuable insights from the speaker's experience bringing up this exotic platform and explore future development directions for Arm-based virtualization solutions.
