projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| bdcfb955 JHY |
1 | .. SPDX-License-Identifier: GPL-2.0-only |
| 2 | ||
| 3 | Kernel driver peci-cputemp | |
| 4 | ========================== | |
| 5 | ||
| 6 | Supported chips: | |
| 7 | One of Intel server CPUs listed below which is connected to a PECI bus. | |
| 8 | * Intel Xeon E5/E7 v3 server processors | |
| 9 | Intel Xeon E5-14xx v3 family | |
| 10 | Intel Xeon E5-24xx v3 family | |
| 11 | Intel Xeon E5-16xx v3 family | |
| 12 | Intel Xeon E5-26xx v3 family | |
| 13 | Intel Xeon E5-46xx v3 family | |
| 14 | Intel Xeon E7-48xx v3 family | |
| 15 | Intel Xeon E7-88xx v3 family | |
| 16 | * Intel Xeon E5/E7 v4 server processors | |
| 17 | Intel Xeon E5-16xx v4 family | |
| 18 | Intel Xeon E5-26xx v4 family | |
| 19 | Intel Xeon E5-46xx v4 family | |
| 20 | Intel Xeon E7-48xx v4 family | |
| 21 | Intel Xeon E7-88xx v4 family | |
| 22 | * Intel Xeon Scalable server processors | |
| 23 | Intel Xeon D family | |
| 24 | Intel Xeon Bronze family | |
| 25 | Intel Xeon Silver family | |
| 26 | Intel Xeon Gold family | |
| 27 | Intel Xeon Platinum family | |
| 28 | ||
| 29 | Datasheet: Available from http://www.intel.com/design/literature.htm | |
| 30 | ||
| 31 | Author: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> | |
| 32 | ||
| 33 | Description | |
| 34 | ----------- | |
| 35 | ||
| 36 | This driver implements a generic PECI hwmon feature which provides Digital | |
| 37 | Thermal Sensor (DTS) thermal readings of the CPU package and CPU cores that are | |
| 38 | accessible via the processor PECI interface. | |
| 39 | ||
| 40 | All temperature values are given in millidegree Celsius and will be measurable | |
| 41 | only when the target CPU is powered on. | |
| 42 | ||
| 43 | Sysfs interface | |
| 44 | ------------------- | |
| 45 | ||
| 46 | ======================= ======================================================= | |
| 47 | temp1_label "Die" | |
| 48 | temp1_input Provides current die temperature of the CPU package. | |
| 49 | temp1_max Provides thermal control temperature of the CPU package | |
| 50 | which is also known as Tcontrol. | |
| 51 | temp1_crit Provides shutdown temperature of the CPU package which | |
| 52 | is also known as the maximum processor junction | |
| 53 | temperature, Tjmax or Tprochot. | |
| 54 | temp1_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of | |
| 55 | the CPU package. | |
| 56 | ||
| 57 | temp2_label "DTS" | |
| 58 | temp2_input Provides current temperature of the CPU package scaled | |
| 59 | to match DTS thermal profile. | |
| 60 | temp2_max Provides thermal control temperature of the CPU package | |
| 61 | which is also known as Tcontrol. | |
| 62 | temp2_crit Provides shutdown temperature of the CPU package which | |
| 63 | is also known as the maximum processor junction | |
| 64 | temperature, Tjmax or Tprochot. | |
| 65 | temp2_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of | |
| 66 | the CPU package. | |
| 67 | ||
| 68 | temp3_label "Tcontrol" | |
| 69 | temp3_input Provides current Tcontrol temperature of the CPU | |
| 70 | package which is also known as Fan Temperature target. | |
| 71 | Indicates the relative value from thermal monitor trip | |
| 72 | temperature at which fans should be engaged. | |
| 73 | temp3_crit Provides Tcontrol critical value of the CPU package | |
| 74 | which is same to Tjmax. | |
| 75 | ||
| 76 | temp4_label "Tthrottle" | |
| 77 | temp4_input Provides current Tthrottle temperature of the CPU | |
| 78 | package. Used for throttling temperature. If this value | |
| 79 | is allowed and lower than Tjmax - the throttle will | |
| 80 | occur and reported at lower than Tjmax. | |
| 81 | ||
| 82 | temp5_label "Tjmax" | |
| 83 | temp5_input Provides the maximum junction temperature, Tjmax of the | |
| 84 | CPU package. | |
| 85 | ||
| 86 | temp[6-N]_label Provides string "Core X", where X is resolved core | |
| 87 | number. | |
| 88 | temp[6-N]_input Provides current temperature of each core. | |
| 89 | ||
| 90 | ======================= ======================================================= |