Export Intel IOMMU internals in Debugfs

modulename: debugfs.ko

configname: CONFIG_INTEL_IOMMU_DEBUGFS

Linux Kernel Configuration
└─>Device Drivers
└─>IOMMU Hardware Support
└─>Export Intel IOMMU internals in Debugfs
In linux kernel since version 4.2 (release Date: 2015-08-30)  
!!!WARNING!!!

DO NOT ENABLE THIS OPTION UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!!!

Expose Intel IOMMU internals in Debugfs.

This option is -NOT- intended for production environments, and should
only be enabled for debugging Intel IOMMU.

source code: