Virtio for PCI Endpoint Subsystem in Linux Kernel
summary
Adds Virtio backend support to the PCI Endpoint subsystem by using the virtio message transport instead of legacy PCI Virtio, implementing a host-side Virtio message PCI driver and an endpoint vnet backend. Prototype runs and achieves 2 Gbits per second but hits real-world blockers: missing MSI/MSI-X, IOMMU translation faults, legacy-versus-modern spec gaps and PCI-side races from missing doorbell support. Plan is upstreaming virtio-message first, then endpoint patches, doorbell and RX-merge improvements.
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chapters (9)
- 0:00Introduction and agenda
- 1:08Virtio overview
- 4:23PCI endpoint subsystem
- 8:57Benefits of Virtio for PCI
- 10:59Proposed architectures
- 14:14Implementation challenges
- 19:30Virtio-msg transport
- 23:28Implementation results
- 25:42Future plans and Q&A
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