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1 | Kernel driver k10temp |
2 | ===================== | |
3 | ||
4 | Supported chips: | |
5 | * AMD Family 10h processors: | |
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6 | 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) | |
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8 | 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) | |
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12 | * AMD Family 12h processors: "Llano" (E2/A4/A6/A8-Series) |
13 | * AMD Family 14h processors: "Brazos" (C/E/G/Z-Series) | |
f89ce270 | 14 | * AMD Family 15h processors: "Bulldozer" (FX-Series), "Trinity", "Kaveri", "Carrizo" |
ec015950 | 15 | * AMD Family 16h processors: "Kabini", "Mullins" |
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16 | |
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 | |
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24 | BIOS and Kernel Developer's Guide (BKDG) for AMD Family 12h Processors: |
25 | http://support.amd.com/us/Processor_TechDocs/41131.pdf | |
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26 | 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 | |
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28 | 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 | |
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32 | Revision Guide for AMD Family 12h Processors: |
33 | http://support.amd.com/us/Processor_TechDocs/44739.pdf | |
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34 | Revision Guide for AMD Family 14h Models 00h-0Fh Processors: |
35 | http://support.amd.com/us/Processor_TechDocs/47534.pdf | |
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36 | 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 | ||
43 | Author: Clemens Ladisch <clemens@ladisch.de> | |
44 | ||
45 | Description | |
46 | ----------- | |
47 | ||
48 | This driver permits reading of the internal temperature sensor of AMD | |
ec015950 | 49 | Family 10h/11h/12h/14h/15h/16h processors. |
3c57e89b | 50 | |
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51 | All these processors have a sensor, but on those for Socket F or AM2+, |
52 | the sensor may return inconsistent values (erratum 319). The driver | |
53 | will refuse to load on these revisions unless you specify the "force=1" | |
54 | module parameter. | |
55 | ||
56 | Due to technical reasons, the driver can detect only the mainboard's | |
57 | socket type, not the processor's actual capabilities. Therefore, if you | |
58 | are using an AM3 processor on an AM2+ mainboard, you can safely use the | |
59 | "force=1" parameter. | |
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60 | |
61 | There is one temperature measurement value, available as temp1_input in | |
62 | sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree. | |
63 | Please 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 | ||
73 | The maximum value for Tctl is available in the file temp1_max. | |
74 | ||
75 | If the BIOS has enabled hardware temperature control, the threshold at | |
76 | which the processor will throttle itself to avoid damage is available in | |
77 | temp1_crit and temp1_crit_hyst. |