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Writing Device Drivers for Oracle® Solaris 11.3

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Updated: March 2019


Control Domain

A domain that manages virtualization policies.

Root Domain

A domain that manages the PCIe fabric.

IO Domain

A domain that has exclusive access to IO devices assigned to it.


PCIe fabric components such as root-complexes, root-ports, switches, bridges; configuration space registers of endpoints.


Virtual Machine.

PCI Device (PCI Component)
  • Single or multiple PCI functions

  • Usually one piece of silicon

PCI Function
  • Smallest independent addressable unit in a PCI fabric

  • One set of PCI configuration space registers

PCI Virtual Function
  • Lightweight PCI function in hardware

  • Looks almost the same as PCI function to software