152 lines
5.2 KiB
ReStructuredText
152 lines
5.2 KiB
ReStructuredText
Kernel driver k10temp
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=====================
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Supported chips:
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* AMD Family 10h processors:
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Socket F: Quad-Core/Six-Core/Embedded Opteron (but see below)
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Socket AM2+: Quad-Core Opteron, Phenom (II) X3/X4, Athlon X2 (but see below)
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Socket AM3: Quad-Core Opteron, Athlon/Phenom II X2/X3/X4, Sempron II
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Socket S1G3: Athlon II, Sempron, Turion II
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* AMD Family 11h processors:
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Socket S1G2: Athlon (X2), Sempron (X2), Turion X2 (Ultra)
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* AMD Family 12h processors: "Llano" (E2/A4/A6/A8-Series)
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* AMD Family 14h processors: "Brazos" (C/E/G/Z-Series)
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* AMD Family 15h processors: "Bulldozer" (FX-Series), "Trinity", "Kaveri",
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"Carrizo", "Stoney Ridge", "Bristol Ridge"
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* AMD Family 16h processors: "Kabini", "Mullins"
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* AMD Family 17h processors: "Zen", "Zen 2"
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* AMD Family 18h processors: "Hygon Dhyana"
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* AMD Family 19h processors: "Zen 3"
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Prefix: 'k10temp'
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Addresses scanned: PCI space
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Datasheets:
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BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h Processors:
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http://support.amd.com/us/Processor_TechDocs/31116.pdf
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BIOS and Kernel Developer's Guide (BKDG) for AMD Family 11h Processors:
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http://support.amd.com/us/Processor_TechDocs/41256.pdf
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BIOS and Kernel Developer's Guide (BKDG) for AMD Family 12h Processors:
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http://support.amd.com/us/Processor_TechDocs/41131.pdf
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BIOS and Kernel Developer's Guide (BKDG) for AMD Family 14h Models 00h-0Fh Processors:
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http://support.amd.com/us/Processor_TechDocs/43170.pdf
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Revision Guide for AMD Family 10h Processors:
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http://support.amd.com/us/Processor_TechDocs/41322.pdf
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Revision Guide for AMD Family 11h Processors:
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http://support.amd.com/us/Processor_TechDocs/41788.pdf
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Revision Guide for AMD Family 12h Processors:
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http://support.amd.com/us/Processor_TechDocs/44739.pdf
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Revision Guide for AMD Family 14h Models 00h-0Fh Processors:
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http://support.amd.com/us/Processor_TechDocs/47534.pdf
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AMD Family 11h Processor Power and Thermal Data Sheet for Notebooks:
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http://support.amd.com/us/Processor_TechDocs/43373.pdf
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AMD Family 10h Server and Workstation Processor Power and Thermal Data Sheet:
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http://support.amd.com/us/Processor_TechDocs/43374.pdf
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AMD Family 10h Desktop Processor Power and Thermal Data Sheet:
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http://support.amd.com/us/Processor_TechDocs/43375.pdf
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Author: Clemens Ladisch <clemens@ladisch.de>
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Description
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-----------
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This driver permits reading of the internal temperature sensor of AMD
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Family 10h/11h/12h/14h/15h/16h processors.
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All these processors have a sensor, but on those for Socket F or AM2+,
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the sensor may return inconsistent values (erratum 319). The driver
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will refuse to load on these revisions unless you specify the "force=1"
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module parameter.
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Due to technical reasons, the driver can detect only the mainboard's
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socket type, not the processor's actual capabilities. Therefore, if you
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are using an AM3 processor on an AM2+ mainboard, you can safely use the
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"force=1" parameter.
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For CPUs older than Family 17h, there is one temperature measurement value,
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available as temp1_input in sysfs. It is measured in degrees Celsius with a
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resolution of 1/8th degree. Please note that it is defined as a relative
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value; to quote the AMD manual::
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Tctl is the processor temperature control value, used by the platform to
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control cooling systems. Tctl is a non-physical temperature on an
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arbitrary scale measured in degrees. It does _not_ represent an actual
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physical temperature like die or case temperature. Instead, it specifies
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the processor temperature relative to the point at which the system must
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supply the maximum cooling for the processor's specified maximum case
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temperature and maximum thermal power dissipation.
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The maximum value for Tctl is available in the file temp1_max.
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If the BIOS has enabled hardware temperature control, the threshold at
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which the processor will throttle itself to avoid damage is available in
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temp1_crit and temp1_crit_hyst.
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On some AMD CPUs, there is a difference between the die temperature (Tdie) and
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the reported temperature (Tctl). Tdie is the real measured temperature, and
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Tctl is used for fan control. While Tctl is always available as temp1_input,
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the driver exports Tdie temperature as temp2_input for those CPUs which support
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it.
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Models from 17h family report relative temperature, the driver aims to
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compensate and report the real temperature.
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On Family 17h and Family 18h CPUs, additional temperature sensors may report
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Core Complex Die (CCD) temperatures. Up to 8 such temperatures are reported
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as temp{3..10}_input, labeled Tccd{1..8}. Actual support depends on the CPU
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variant.
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Various Family 17h and 18h CPUs report voltage and current telemetry
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information. The following attributes may be reported.
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Attribute Label Description
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=============== ======= ================
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in0_input Vcore Core voltage
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in1_input Vsoc SoC voltage
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curr1_input Icore Core current
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curr2_input Isoc SoC current
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=============== ======= ================
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Current values are raw (unscaled) as reported by the CPU. Core current is
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reported as multiples of 1A / LSB. SoC is reported as multiples of 0.25A
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/ LSB. The real current is board specific. Reported currents should be seen
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as rough guidance, and should be scaled using sensors3.conf as appropriate
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for a given board.
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