| Clemens Ladisch | 3c57e89 | 2009-12-16 21:38:25 +0100 | [diff] [blame] | 1 | Kernel driver k10temp |
| 2 | ===================== |
| 3 | |
| 4 | Supported chips: |
| 5 | * AMD Family 10h processors: |
| Clemens Ladisch | c5114a1 | 2010-01-10 20:52:34 +0100 | [diff] [blame] | 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) |
| Clemens Ladisch | 3c57e89 | 2009-12-16 21:38:25 +0100 | [diff] [blame] | 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) |
| 12 | |
| 13 | Prefix: 'k10temp' |
| 14 | Addresses scanned: PCI space |
| 15 | Datasheets: |
| 16 | BIOS and Kernel Developer's Guide (BKDG) For AMD Family 10h Processors: |
| 17 | http://support.amd.com/us/Processor_TechDocs/31116.pdf |
| 18 | BIOS and Kernel Developer's Guide (BKDG) for AMD Family 11h Processors: |
| 19 | http://support.amd.com/us/Processor_TechDocs/41256.pdf |
| 20 | Revision Guide for AMD Family 10h Processors: |
| 21 | http://support.amd.com/us/Processor_TechDocs/41322.pdf |
| 22 | Revision Guide for AMD Family 11h Processors: |
| 23 | http://support.amd.com/us/Processor_TechDocs/41788.pdf |
| 24 | AMD Family 11h Processor Power and Thermal Data Sheet for Notebooks: |
| 25 | http://support.amd.com/us/Processor_TechDocs/43373.pdf |
| 26 | AMD Family 10h Server and Workstation Processor Power and Thermal Data Sheet: |
| 27 | http://support.amd.com/us/Processor_TechDocs/43374.pdf |
| 28 | AMD Family 10h Desktop Processor Power and Thermal Data Sheet: |
| 29 | http://support.amd.com/us/Processor_TechDocs/43375.pdf |
| 30 | |
| 31 | Author: Clemens Ladisch <clemens@ladisch.de> |
| 32 | |
| 33 | Description |
| 34 | ----------- |
| 35 | |
| 36 | This driver permits reading of the internal temperature sensor of AMD |
| 37 | Family 10h and 11h processors. |
| 38 | |
| Clemens Ladisch | c5114a1 | 2010-01-10 20:52:34 +0100 | [diff] [blame] | 39 | All these processors have a sensor, but on those for Socket F or AM2+, |
| 40 | the sensor may return inconsistent values (erratum 319). The driver |
| 41 | will refuse to load on these revisions unless you specify the "force=1" |
| 42 | module parameter. |
| 43 | |
| 44 | Due to technical reasons, the driver can detect only the mainboard's |
| 45 | socket type, not the processor's actual capabilities. Therefore, if you |
| 46 | are using an AM3 processor on an AM2+ mainboard, you can safely use the |
| 47 | "force=1" parameter. |
| Clemens Ladisch | 3c57e89 | 2009-12-16 21:38:25 +0100 | [diff] [blame] | 48 | |
| 49 | There is one temperature measurement value, available as temp1_input in |
| 50 | sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree. |
| 51 | Please note that it is defined as a relative value; to quote the AMD manual: |
| 52 | |
| 53 | Tctl is the processor temperature control value, used by the platform to |
| 54 | control cooling systems. Tctl is a non-physical temperature on an |
| 55 | arbitrary scale measured in degrees. It does _not_ represent an actual |
| 56 | physical temperature like die or case temperature. Instead, it specifies |
| 57 | the processor temperature relative to the point at which the system must |
| 58 | supply the maximum cooling for the processor's specified maximum case |
| 59 | temperature and maximum thermal power dissipation. |
| 60 | |
| 61 | The maximum value for Tctl is available in the file temp1_max. |
| 62 | |
| 63 | If the BIOS has enabled hardware temperature control, the threshold at |
| 64 | which the processor will throttle itself to avoid damage is available in |
| 65 | temp1_crit and temp1_crit_hyst. |