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- Kernel driver k10temp
- =====================
- Supported chips:
- * AMD Family 10h processors:
- Socket F: Quad-Core/Six-Core/Embedded Opteron (but see below)
- Socket AM2+: Quad-Core Opteron, Phenom (II) X3/X4, Athlon X2 (but see below)
- Socket AM3: Quad-Core Opteron, Athlon/Phenom II X2/X3/X4, Sempron II
- Socket S1G3: Athlon II, Sempron, Turion II
- * AMD Family 11h processors:
- Socket S1G2: Athlon (X2), Sempron (X2), Turion X2 (Ultra)
- Prefix: 'k10temp'
- Addresses scanned: PCI space
- Datasheets:
- BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h Processors:
- http://support.amd.com/us/Processor_TechDocs/31116.pdf
- BIOS and Kernel Developer's Guide (BKDG) for AMD Family 11h Processors:
- http://support.amd.com/us/Processor_TechDocs/41256.pdf
- Revision Guide for AMD Family 10h Processors:
- http://support.amd.com/us/Processor_TechDocs/41322.pdf
- Revision Guide for AMD Family 11h Processors:
- http://support.amd.com/us/Processor_TechDocs/41788.pdf
- AMD Family 11h Processor Power and Thermal Data Sheet for Notebooks:
- http://support.amd.com/us/Processor_TechDocs/43373.pdf
- AMD Family 10h Server and Workstation Processor Power and Thermal Data Sheet:
- http://support.amd.com/us/Processor_TechDocs/43374.pdf
- AMD Family 10h Desktop Processor Power and Thermal Data Sheet:
- http://support.amd.com/us/Processor_TechDocs/43375.pdf
- Author: Clemens Ladisch <clemens@ladisch.de>
- Description
- -----------
- This driver permits reading of the internal temperature sensor of AMD
- Family 10h and 11h processors.
- All these processors have a sensor, but on those for Socket F or AM2+,
- the sensor may return inconsistent values (erratum 319). The driver
- will refuse to load on these revisions unless you specify the "force=1"
- module parameter.
- Due to technical reasons, the driver can detect only the mainboard's
- socket type, not the processor's actual capabilities. Therefore, if you
- are using an AM3 processor on an AM2+ mainboard, you can safely use the
- "force=1" parameter.
- There is one temperature measurement value, available as temp1_input in
- sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree.
- Please note that it is defined as a relative value; to quote the AMD manual:
- Tctl is the processor temperature control value, used by the platform to
- control cooling systems. Tctl is a non-physical temperature on an
- arbitrary scale measured in degrees. It does _not_ represent an actual
- physical temperature like die or case temperature. Instead, it specifies
- the processor temperature relative to the point at which the system must
- supply the maximum cooling for the processor's specified maximum case
- temperature and maximum thermal power dissipation.
- The maximum value for Tctl is available in the file temp1_max.
- If the BIOS has enabled hardware temperature control, the threshold at
- which the processor will throttle itself to avoid damage is available in
- temp1_crit and temp1_crit_hyst.
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