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1.. SPDX-License-Identifier: GPL-2.0-only2 3Kernel driver peci-cputemp4==========================5 6Supported chips:7 One of Intel server CPUs listed below which is connected to a PECI bus.8 * Intel Xeon E5/E7 v3 server processors9 Intel Xeon E5-14xx v3 family10 Intel Xeon E5-24xx v3 family11 Intel Xeon E5-16xx v3 family12 Intel Xeon E5-26xx v3 family13 Intel Xeon E5-46xx v3 family14 Intel Xeon E7-48xx v3 family15 Intel Xeon E7-88xx v3 family16 * Intel Xeon E5/E7 v4 server processors17 Intel Xeon E5-16xx v4 family18 Intel Xeon E5-26xx v4 family19 Intel Xeon E5-46xx v4 family20 Intel Xeon E7-48xx v4 family21 Intel Xeon E7-88xx v4 family22 * Intel Xeon Scalable server processors23 Intel Xeon D family24 Intel Xeon Bronze family25 Intel Xeon Silver family26 Intel Xeon Gold family27 Intel Xeon Platinum family28 29 Datasheet: Available from http://www.intel.com/design/literature.htm30 31Author: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>32 33Description34-----------35 36This driver implements a generic PECI hwmon feature which provides Digital37Thermal Sensor (DTS) thermal readings of the CPU package and CPU cores that are38accessible via the processor PECI interface.39 40All temperature values are given in millidegree Celsius and will be measurable41only when the target CPU is powered on.42 43Sysfs interface44-------------------45 46======================= =======================================================47temp1_label "Die"48temp1_input Provides current die temperature of the CPU package.49temp1_max Provides thermal control temperature of the CPU package50 which is also known as Tcontrol.51temp1_crit Provides shutdown temperature of the CPU package which52 is also known as the maximum processor junction53 temperature, Tjmax or Tprochot.54temp1_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of55 the CPU package.56 57temp2_label "DTS"58temp2_input Provides current temperature of the CPU package scaled59 to match DTS thermal profile.60temp2_max Provides thermal control temperature of the CPU package61 which is also known as Tcontrol.62temp2_crit Provides shutdown temperature of the CPU package which63 is also known as the maximum processor junction64 temperature, Tjmax or Tprochot.65temp2_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of66 the CPU package.67 68temp3_label "Tcontrol"69temp3_input Provides current Tcontrol temperature of the CPU70 package which is also known as Fan Temperature target.71 Indicates the relative value from thermal monitor trip72 temperature at which fans should be engaged.73temp3_crit Provides Tcontrol critical value of the CPU package74 which is same to Tjmax.75 76temp4_label "Tthrottle"77temp4_input Provides current Tthrottle temperature of the CPU78 package. Used for throttling temperature. If this value79 is allowed and lower than Tjmax - the throttle will80 occur and reported at lower than Tjmax.81 82temp5_label "Tjmax"83temp5_input Provides the maximum junction temperature, Tjmax of the84 CPU package.85 86temp[6-N]_label Provides string "Core X", where X is resolved core87 number.88temp[6-N]_input Provides current temperature of each core.89 90======================= =======================================================91