CONFIG_VFIO_IOMMU_TYPE1 (not configurable)

modulename: vfio_iommu_type1.ko

configname: CONFIG_VFIO_IOMMU_TYPE1

Linux Kernel Configuration
└─>Device Drivers
└─>VFIO Non-Privileged userspace driver framework
└─>VFIO_IOMMU_TYPE1
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
drivers/vfio/vfio_iommu_type1.c
depends
CONFIG_VFIO