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KM(4) Device Drivers Manual KM(4)

km
AMD K10 temperature sensor

km* at pci?

The km driver provides support for the temperature sensors available in the AMD Family 10h, 11h, 14h, and 15h processors.
Each chip reports one temperature sensor. Multiprocessor systems have one instance of km per chip. The highest resolution supported by the driver is 0.125 degC.
Sensor values are made available through the sysctl(8) interface.

intro(4), pci(4), sensorsd(8), sysctl(8)
BIOS and Kernel Developer's Guide for AMD Family 10h Processors, Publication # 31116, pp. 236--237 and pp. 243--244, March 26, 2008.
BIOS and Kernel Developer's Guide for AMD Family 11h Processors, Publication # 41256, pp. 156--157 and pp. 159--160, July 07, 2008.
BIOS and Kernel Developer's Guide for AMD Family 14h Models 00h-04h Processors, Publication # 43170, pp. 277--278 and pp. 280--282, May 02, 2011.

The km driver first appeared in OpenBSD 4.4.

The km driver was written by Constantine A. Murenin <cnst@openbsd.org>, University of Waterloo.
July 16, 2013 OpenBSD-5.6