Export AMD IOMMU statistics to debugfs

configname: CONFIG_AMD_IOMMU_STATS

Linux Kernel Configuration
└─>Device Drivers
└─>IOMMU Hardware Support
└─>Export AMD IOMMU statistics to debugfs
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
This option enables code in the AMD IOMMU driver to collect various
statistics about whats happening in the driver and exports that
information to userspace via debugfs.
If unsure, say N.