IPMI System Interface handler

modulename: ipmi_si.ko

configname: CONFIG_IPMI_SI

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>IPMI top-level message handler
└─>IPMI System Interface handler
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Provides a driver for System Interfaces (KCS, SMIC, BT).
Currently, only KCS and SMIC are supported. If
you are using IPMI, you should probably say "y" here.

source code:
drivers/char/ipmi/