CONFIG_INTEL_IOATDMA is not available for thedefaultarchitecture x86.
Result is shown for architecture 64BIT

Intel I/OAT DMA support

modulename: ioatdma.ko


Linux Kernel Configuration
└─>Device Drivers
└─>DMA Engine support
└─>PCI support
└─>Intel I/OAT DMA support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Enable support for the Intel(R) I/OAT DMA engine present
in recent Intel Xeon chipsets.

Say Y here if you have such a chipset.

If unsure, say N.

source code: