CONFIG_DMAR_TABLE (not configurable)

modulename: dmar.ko

and/or

trace.ko

configname: CONFIG_DMAR_TABLE

Linux Kernel Configuration
└─>Device Drivers
└─>IOMMU Hardware Support
└─>DMAR_TABLE
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
drivers/iommu/intel//dmar.c