---
name: "phb"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/phb"
---

# phb(4)

IODA PCIe host bridge

## NAME

**phb** – IODA PCIe host bridge

## SYNOPSIS

**phb\* at fdt?** **pci\* at phb?**

## DESCRIPTION

The **phb** driver provides support for PCIe host bridges conforming to the IODA2 and IODA3 specifications, as found on POWER CPUs.

## SEE ALSO

[intro(4)](/intro/4.md), [pci(4)](/pci/4.md)

## HISTORY

The **phb** driver first appeared in OpenBSD 6.8.

## AUTHORS

The **phb** driver was written by Mark Kettenis ⟨*kettenis@openbsd.org*⟩.