SGI IOC4 Base IO support

modulename: ioc4.ko

configname: CONFIG_SGI_IOC4

Linux Kernel Configuration
└─>Device Drivers
└─>Misc devices
└─>SGI IOC4 Base IO support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This option enables basic support for the IOC4 chip on certain
SGI IO controller cards (IO9, IO10, and PCI-RT). This option
does not enable any specific functions on such a card, but provides
necessary infrastructure for other drivers to utilize.

If you have an SGI Altix with an IOC4-based card say Y.
Otherwise say N.

source code:
depends
CONFIG_PCI

is selected by
CONFIG_BLK_DEV_SGIIOC4