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Explore how Virtio technology can be extended beyond traditional virtualization environments to enhance the PCI Endpoint subsystem in the Linux kernel. Learn about the challenges developers face when creating function drivers for PCI endpoint devices like modems, NICs, and GPUs, which typically require developing both endpoint and host-side drivers. Discover how implementing Virtio backend support in the PCI Endpoint subsystem can streamline development by allowing developers to focus on backend drivers while leveraging existing frontend drivers on host systems such as virt-net and virt-gpu. Examine community proposals for integrating Virtio with the PCI Endpoint subsystem, understand the consensus solution that emerged, and gain insights into future development plans for this innovative approach to cross-system communication.
