1.. SPDX-License-Identifier: GPL-2.0-only 2 3Kernel driver peci-cputemp 4========================== 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 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 31Author: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> 32 33Description 34----------- 35 36This driver implements a generic PECI hwmon feature which provides Digital 37Thermal Sensor (DTS) thermal readings of the CPU package and CPU cores that are 38accessible via the processor PECI interface. 39 40All temperature values are given in millidegree Celsius and will be measurable 41only when the target CPU is powered on. 42 43Sysfs interface 44------------------- 45 46======================= ======================================================= 47temp1_label "Die" 48temp1_input Provides current die temperature of the CPU package. 49temp1_max Provides thermal control temperature of the CPU package 50 which is also known as Tcontrol. 51temp1_crit Provides shutdown temperature of the CPU package which 52 is also known as the maximum processor junction 53 temperature, Tjmax or Tprochot. 54temp1_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of 55 the CPU package. 56 57temp2_label "DTS" 58temp2_input Provides current temperature of the CPU package scaled 59 to match DTS thermal profile. 60temp2_max Provides thermal control temperature of the CPU package 61 which is also known as Tcontrol. 62temp2_crit Provides shutdown temperature of the CPU package which 63 is also known as the maximum processor junction 64 temperature, Tjmax or Tprochot. 65temp2_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of 66 the CPU package. 67 68temp3_label "Tcontrol" 69temp3_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. 73temp3_crit Provides Tcontrol critical value of the CPU package 74 which is same to Tjmax. 75 76temp4_label "Tthrottle" 77temp4_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 82temp5_label "Tjmax" 83temp5_input Provides the maximum junction temperature, Tjmax of the 84 CPU package. 85 86temp[6-N]_label Provides string "Core X", where X is resolved core 87 number. 88temp[6-N]_input Provides current temperature of each core. 89 90======================= ======================================================= 91