IOMMU Hardware Support

configname: CONFIG_IOMMU_SUPPORT

Linux Kernel Configuration
└─>Device Drivers
└─>IOMMU Hardware Support
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say Y here if you want to compile device drivers for IO Memory
Management Units into the kernel. These devices usually allow to
remap DMA requests and/or remap interrupts from other devices on the
system.