---
name: "acpimcfg"
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/acpimcfg"
---

# acpimcfg(4)

ACPI PCI Express configuration space

## NAME

**acpimcfg** – ACPI PCI Express configuration space

## SYNOPSIS

**acpimcfg\* at acpi?**

## DESCRIPTION

The **acpimcfg** driver configures access to PCI Express configuration space based on information extracted from the ACPI MCFG table.

## SEE ALSO

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

## HISTORY

The **acpimcfg** driver first appeared in OpenBSD 4.9.

## AUTHORS

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