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KM(4)                 DragonFly Kernel Interfaces Manual                 KM(4)


NAME

     km - AMD K10 temperature sensor


SYNOPSIS

     To compile this driver into the kernel, place the following lines in your
     kernel configuration file:

           device pci
           device km

     Alternatively, to load the driver as a module at boot time, place the
     following line in loader.conf(5):

           km_load="YES"


DESCRIPTION

     The km driver provides support for the temperature sensors available in
     the AMD Family 10h, 11h, 12h, 14h, 15h and 16h 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 HW_SENSORS sysctl(3)
     interface, and can be monitored with the systat(1) sensors display,
     sensorsd(8) and sysctl(8) hw.sensors.  For example, with an AMD Phenom X4
     9850 Black Edition 2.5GHz Socket AM2+ 125W quad-core processor:

           %sysctl hw.sensors.km0
           hw.sensors.km0.temp0: 60.50 degC


SEE ALSO

     systat(1), sysctl(3), amdtemp(4), intro(4), kate(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 12h Processors,
     Publication # 41131 Rev 3.02, pp. 303--304 and p. 316, October 06, 2011.

     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.

     BIOS and Kernel Developer's Guide for AMD Family 15h Models 00h-0Fh
     Processors, Publication # 42301 Rev 3.14, pp. 374--375 and pp. 293--294,
     January 23, 2013.

     BIOS and Kernel Developer's Guide for AMD Family 15h Models 10h-1Fh
     Processors, Publication # 42300 Rev 3.10, p. 419 and pp. 432--433, June
     04, 2013.

     BIOS and Kernel Developer's Guide for AMD Family 15h Models 30h-3Fh
     Processors, Publication # 49125 Rev 3.03, p. 440 and pp. 457--458, June
     17, 2014.

     Preliminary BIOS and Kernel Developer's Guide for AMD Family 16h Models
     00h-0Fh Processors, Publication # 48751 Rev 3.00, p. 400 and pp.
     418--419, May 30, 2013.


HISTORY

     The km driver first appeared in OpenBSD 4.4 and DragonFly 2.5.


AUTHORS

     The km driver was written for OpenBSD and DragonFly by Constantine A.
     Murenin <http://cnst.su/>, Raouf Boutaba Research Group, David R.
     Cheriton School of Computer Science, University of Waterloo.

DragonFly 5.9-DEVELOPMENT       August 2, 2020       DragonFly 5.9-DEVELOPMENT

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