MSM IOMMU Support

modulename: devices-iommu.ko

and/or

msm_iommu.ko

configname: CONFIG_MSM_IOMMU

Linux Kernel Configuration
└─>Device Drivers
└─>IOMMU Hardware Support
└─>MSM IOMMU Support
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
Support for the IOMMUs found on certain Qualcomm SOCs.
These IOMMUs allow virtualization of the address space used by most
cores within the multimedia subsystem.

If unsure, say N here.

source code:
arch/arm/mach-msm/devices-iommu.c