VFIO Internals

The following document will attempt to detail the internals of Virtual Function IO (VFIO).

Requirements:

Sensitive Instruction List.

Instruction Shim/Binary Translator.

HPA<->GPA Boundary Enforcement.

RPC Mode

RPC Mode moves instruction information between across a virtual function interface (VF) using Remote Procedure Calls generally by way of soft interrupt (IOCTLs).

SR-IOV Mode

SR-IOV Mode involves the communication of instructions from a virtual function (VF) though direct communication to the PCI BAR.