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Clemens Ladisch3c57e892009-12-16 21:38:25 +01001Kernel driver k10temp
2=====================
3
4Supported chips:
5* AMD Family 10h processors:
Clemens Ladischc5114a12010-01-10 20:52:34 +01006 Socket F: Quad-Core/Six-Core/Embedded Opteron (but see below)
7 Socket AM2+: Quad-Core Opteron, Phenom (II) X3/X4, Athlon X2 (but see below)
Clemens Ladisch3c57e892009-12-16 21:38:25 +01008 Socket AM3: Quad-Core Opteron, Athlon/Phenom II X2/X3/X4, Sempron II
9 Socket S1G3: Athlon II, Sempron, Turion II
10* AMD Family 11h processors:
11 Socket S1G2: Athlon (X2), Sempron (X2), Turion X2 (Ultra)
Clemens Ladischaf75d5b2011-07-03 13:32:54 +020012* AMD Family 12h processors: "Llano" (E2/A4/A6/A8-Series)
13* AMD Family 14h processors: "Brazos" (C/E/G/Z-Series)
Aravind Gopalakrishnanec015952014-03-11 16:25:59 -050014* AMD Family 15h processors: "Bulldozer" (FX-Series), "Trinity", "Kaveri"
15* AMD Family 16h processors: "Kabini", "Mullins"
Clemens Ladisch3c57e892009-12-16 21:38:25 +010016
17 Prefix: 'k10temp'
18 Addresses scanned: PCI space
19 Datasheets:
20 BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h Processors:
21 http://support.amd.com/us/Processor_TechDocs/31116.pdf
22 BIOS and Kernel Developer's Guide (BKDG) for AMD Family 11h Processors:
23 http://support.amd.com/us/Processor_TechDocs/41256.pdf
Clemens Ladischaf75d5b2011-07-03 13:32:54 +020024 BIOS and Kernel Developer's Guide (BKDG) for AMD Family 12h Processors:
25 http://support.amd.com/us/Processor_TechDocs/41131.pdf
Clemens Ladischaa4790a2011-02-17 03:22:40 -050026 BIOS and Kernel Developer's Guide (BKDG) for AMD Family 14h Models 00h-0Fh Processors:
27 http://support.amd.com/us/Processor_TechDocs/43170.pdf
Clemens Ladisch3c57e892009-12-16 21:38:25 +010028 Revision Guide for AMD Family 10h Processors:
29 http://support.amd.com/us/Processor_TechDocs/41322.pdf
30 Revision Guide for AMD Family 11h Processors:
31 http://support.amd.com/us/Processor_TechDocs/41788.pdf
Clemens Ladischaf75d5b2011-07-03 13:32:54 +020032 Revision Guide for AMD Family 12h Processors:
33 http://support.amd.com/us/Processor_TechDocs/44739.pdf
Clemens Ladischaa4790a2011-02-17 03:22:40 -050034 Revision Guide for AMD Family 14h Models 00h-0Fh Processors:
35 http://support.amd.com/us/Processor_TechDocs/47534.pdf
Clemens Ladisch3c57e892009-12-16 21:38:25 +010036 AMD Family 11h Processor Power and Thermal Data Sheet for Notebooks:
37 http://support.amd.com/us/Processor_TechDocs/43373.pdf
38 AMD Family 10h Server and Workstation Processor Power and Thermal Data Sheet:
39 http://support.amd.com/us/Processor_TechDocs/43374.pdf
40 AMD Family 10h Desktop Processor Power and Thermal Data Sheet:
41 http://support.amd.com/us/Processor_TechDocs/43375.pdf
42
43Author: Clemens Ladisch <clemens@ladisch.de>
44
45Description
46-----------
47
48This driver permits reading of the internal temperature sensor of AMD
Aravind Gopalakrishnanec015952014-03-11 16:25:59 -050049Family 10h/11h/12h/14h/15h/16h processors.
Clemens Ladisch3c57e892009-12-16 21:38:25 +010050
Clemens Ladischc5114a12010-01-10 20:52:34 +010051All these processors have a sensor, but on those for Socket F or AM2+,
52the sensor may return inconsistent values (erratum 319). The driver
53will refuse to load on these revisions unless you specify the "force=1"
54module parameter.
55
56Due to technical reasons, the driver can detect only the mainboard's
57socket type, not the processor's actual capabilities. Therefore, if you
58are using an AM3 processor on an AM2+ mainboard, you can safely use the
59"force=1" parameter.
Clemens Ladisch3c57e892009-12-16 21:38:25 +010060
61There is one temperature measurement value, available as temp1_input in
62sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree.
63Please note that it is defined as a relative value; to quote the AMD manual:
64
65 Tctl is the processor temperature control value, used by the platform to
66 control cooling systems. Tctl is a non-physical temperature on an
67 arbitrary scale measured in degrees. It does _not_ represent an actual
68 physical temperature like die or case temperature. Instead, it specifies
69 the processor temperature relative to the point at which the system must
70 supply the maximum cooling for the processor's specified maximum case
71 temperature and maximum thermal power dissipation.
72
73The maximum value for Tctl is available in the file temp1_max.
74
75If the BIOS has enabled hardware temperature control, the threshold at
76which the processor will throttle itself to avoid damage is available in
77temp1_crit and temp1_crit_hyst.