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- .. SPDX-License-Identifier: GPL-2.0-only
- Kernel driver peci-cputemp
- ==========================
- Supported chips:
- One of Intel server CPUs listed below which is connected to a PECI bus.
- * Intel Xeon E5/E7 v3 server processors
- Intel Xeon E5-14xx v3 family
- Intel Xeon E5-24xx v3 family
- Intel Xeon E5-16xx v3 family
- Intel Xeon E5-26xx v3 family
- Intel Xeon E5-46xx v3 family
- Intel Xeon E7-48xx v3 family
- Intel Xeon E7-88xx v3 family
- * Intel Xeon E5/E7 v4 server processors
- Intel Xeon E5-16xx v4 family
- Intel Xeon E5-26xx v4 family
- Intel Xeon E5-46xx v4 family
- Intel Xeon E7-48xx v4 family
- Intel Xeon E7-88xx v4 family
- * Intel Xeon Scalable server processors
- Intel Xeon D family
- Intel Xeon Bronze family
- Intel Xeon Silver family
- Intel Xeon Gold family
- Intel Xeon Platinum family
- Datasheet: Available from http://www.intel.com/design/literature.htm
- Author: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
- Description
- -----------
- This driver implements a generic PECI hwmon feature which provides Digital
- Thermal Sensor (DTS) thermal readings of the CPU package and CPU cores that are
- accessible via the processor PECI interface.
- All temperature values are given in millidegree Celsius and will be measurable
- only when the target CPU is powered on.
- Sysfs interface
- -------------------
- ======================= =======================================================
- temp1_label "Die"
- temp1_input Provides current die temperature of the CPU package.
- temp1_max Provides thermal control temperature of the CPU package
- which is also known as Tcontrol.
- temp1_crit Provides shutdown temperature of the CPU package which
- is also known as the maximum processor junction
- temperature, Tjmax or Tprochot.
- temp1_crit_hyst Provides the hysteresis temperature of the CPU
- package. Returns Tcontrol, the temperature at which
- the critical condition clears.
- temp2_label "DTS"
- temp2_input Provides current temperature of the CPU package scaled
- to match DTS thermal profile.
- temp2_max Provides thermal control temperature of the CPU package
- which is also known as Tcontrol.
- temp2_crit Provides shutdown temperature of the CPU package which
- is also known as the maximum processor junction
- temperature, Tjmax or Tprochot.
- temp2_crit_hyst Provides the hysteresis temperature of the CPU
- package. Returns Tcontrol, the temperature at which
- the critical condition clears.
- temp3_label "Tcontrol"
- temp3_input Provides current Tcontrol temperature of the CPU
- package which is also known as Fan Temperature target.
- Indicates the relative value from thermal monitor trip
- temperature at which fans should be engaged.
- temp3_crit Provides Tcontrol critical value of the CPU package
- which is same to Tjmax.
- temp4_label "Tthrottle"
- temp4_input Provides current Tthrottle temperature of the CPU
- package. Used for throttling temperature. If this value
- is allowed and lower than Tjmax - the throttle will
- occur and reported at lower than Tjmax.
- temp5_label "Tjmax"
- temp5_input Provides the maximum junction temperature, Tjmax of the
- CPU package.
- temp[6-N]_label Provides string "Core X", where X is resolved core
- number.
- temp[6-N]_input Provides current temperature of each core.
- ======================= =======================================================
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