---
title: Plugin: OptionROM
---

## Introduction

This plugin is also able to read and parse the firmware of some PCI devices
which allows some host state verification to be done.

## GUID Generation

These devices use the standard USB DeviceInstanceId values, e.g.

* `PCI\VEN_%04X&DEV_%04X`

## Vendor ID Security

The device is not upgradable and thus requires no vendor ID set.

## External Interface Access

This plugin requires read access to the rom file of PCI devices (`/sys/class/pci_bus/*/device/rom`)

## Version Considerations

This plugin has been available since fwupd version `1.3.3`.
