Old AMD GART IOMMU support

modulename: amd_gart_64.ko

Linux Kernel Configuration
└─> Processor type and features
└─> Old AMD GART IOMMU support

Provides a driver for older AMD Athlon64/Opteron/Turion/Sempron
GART based hardware IOMMUs.

The GART supports full DMA access for devices with 32-bit access
limitations, on systems with more than 3 GB. This is usually needed
for USB, sound, many IDE/SATA chipsets and some other devices.

Newer systems typically have a modern AMD IOMMU, supported via
the CONFIG_AMD_IOMMU=y config option.

In normal configurations this driver is only active when needed:
there's more than 3 GB of memory and the system contains a
32-bit limited device.

If unsure, say Y.

source code: