Liangxu Linux

Feb 14, 2022 · Fundamentals

How SR‑IOV Powers High‑Performance PCIe Passthrough in KVM/QEMU

This article explains the background, hardware and software principles of SR‑IOV, the roles of Physical and Virtual Functions, IOMMU address and interrupt remapping, VFIO interfaces, and the complete QEMU/KVM PCI‑passthrough workflow that enables data‑plane acceleration for virtual machines.