.. 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 value from Tcontrol to Tjmax of
the CPU package.
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 value from Tcontrol to Tjmax of
the CPU package.
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.
======================= =======================================================
