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 temperature of the CPU 55 package. Returns Tcontrol, the temperature at which 56 the critical condition clears. 57 58temp2_label "DTS" 59temp2_input Provides current temperature of the CPU package scaled 60 to match DTS thermal profile. 61temp2_max Provides thermal control temperature of the CPU package 62 which is also known as Tcontrol. 63temp2_crit Provides shutdown temperature of the CPU package which 64 is also known as the maximum processor junction 65 temperature, Tjmax or Tprochot. 66temp2_crit_hyst Provides the hysteresis temperature of the CPU 67 package. Returns Tcontrol, the temperature at which 68 the critical condition clears. 69 70temp3_label "Tcontrol" 71temp3_input Provides current Tcontrol temperature of the CPU 72 package which is also known as Fan Temperature target. 73 Indicates the relative value from thermal monitor trip 74 temperature at which fans should be engaged. 75temp3_crit Provides Tcontrol critical value of the CPU package 76 which is same to Tjmax. 77 78temp4_label "Tthrottle" 79temp4_input Provides current Tthrottle temperature of the CPU 80 package. Used for throttling temperature. If this value 81 is allowed and lower than Tjmax - the throttle will 82 occur and reported at lower than Tjmax. 83 84temp5_label "Tjmax" 85temp5_input Provides the maximum junction temperature, Tjmax of the 86 CPU package. 87 88temp[6-N]_label Provides string "Core X", where X is resolved core 89 number. 90temp[6-N]_input Provides current temperature of each core. 91 92======================= ======================================================= 93