1 .. SPDX-License-Identifier: GPL-2.0-only 1 .. SPDX-License-Identifier: GPL-2.0-only
2 2
3 Kernel driver peci-cputemp 3 Kernel driver peci-cputemp
4 ========================== 4 ==========================
5 5
6 Supported chips: 6 Supported chips:
7 One of Intel server CPUs listed below 7 One of Intel server CPUs listed below which is connected to a PECI bus.
8 * Intel Xeon E5/E7 v3 server p 8 * Intel Xeon E5/E7 v3 server processors
9 Intel Xeon E5-14xx v3 9 Intel Xeon E5-14xx v3 family
10 Intel Xeon E5-24xx v3 10 Intel Xeon E5-24xx v3 family
11 Intel Xeon E5-16xx v3 11 Intel Xeon E5-16xx v3 family
12 Intel Xeon E5-26xx v3 12 Intel Xeon E5-26xx v3 family
13 Intel Xeon E5-46xx v3 13 Intel Xeon E5-46xx v3 family
14 Intel Xeon E7-48xx v3 14 Intel Xeon E7-48xx v3 family
15 Intel Xeon E7-88xx v3 15 Intel Xeon E7-88xx v3 family
16 * Intel Xeon E5/E7 v4 server p 16 * Intel Xeon E5/E7 v4 server processors
17 Intel Xeon E5-16xx v4 17 Intel Xeon E5-16xx v4 family
18 Intel Xeon E5-26xx v4 18 Intel Xeon E5-26xx v4 family
19 Intel Xeon E5-46xx v4 19 Intel Xeon E5-46xx v4 family
20 Intel Xeon E7-48xx v4 20 Intel Xeon E7-48xx v4 family
21 Intel Xeon E7-88xx v4 21 Intel Xeon E7-88xx v4 family
22 * Intel Xeon Scalable server p 22 * Intel Xeon Scalable server processors
23 Intel Xeon D family 23 Intel Xeon D family
24 Intel Xeon Bronze fami 24 Intel Xeon Bronze family
25 Intel Xeon Silver fami 25 Intel Xeon Silver family
26 Intel Xeon Gold family 26 Intel Xeon Gold family
27 Intel Xeon Platinum fa 27 Intel Xeon Platinum family
28 28
29 Datasheet: Available from http://www.i 29 Datasheet: Available from http://www.intel.com/design/literature.htm
30 30
31 Author: Jae Hyun Yoo <jae.hyun.yoo@linux.intel. 31 Author: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
32 32
33 Description 33 Description
34 ----------- 34 -----------
35 35
36 This driver implements a generic PECI hwmon fe 36 This driver implements a generic PECI hwmon feature which provides Digital
37 Thermal Sensor (DTS) thermal readings of the C 37 Thermal Sensor (DTS) thermal readings of the CPU package and CPU cores that are
38 accessible via the processor PECI interface. 38 accessible via the processor PECI interface.
39 39
40 All temperature values are given in millidegre 40 All temperature values are given in millidegree Celsius and will be measurable
41 only when the target CPU is powered on. 41 only when the target CPU is powered on.
42 42
43 Sysfs interface 43 Sysfs interface
44 ------------------- 44 -------------------
45 45
46 ======================= ====================== 46 ======================= =======================================================
47 temp1_label "Die" 47 temp1_label "Die"
48 temp1_input Provides current die t 48 temp1_input Provides current die temperature of the CPU package.
49 temp1_max Provides thermal contr 49 temp1_max Provides thermal control temperature of the CPU package
50 which is also known as 50 which is also known as Tcontrol.
51 temp1_crit Provides shutdown temp 51 temp1_crit Provides shutdown temperature of the CPU package which
52 is also known as the m 52 is also known as the maximum processor junction
53 temperature, Tjmax or 53 temperature, Tjmax or Tprochot.
54 temp1_crit_hyst Provides the hysteresi 54 temp1_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of
55 the CPU package. 55 the CPU package.
56 56
57 temp2_label "DTS" 57 temp2_label "DTS"
58 temp2_input Provides current tempe 58 temp2_input Provides current temperature of the CPU package scaled
59 to match DTS thermal p 59 to match DTS thermal profile.
60 temp2_max Provides thermal contr 60 temp2_max Provides thermal control temperature of the CPU package
61 which is also known as 61 which is also known as Tcontrol.
62 temp2_crit Provides shutdown temp 62 temp2_crit Provides shutdown temperature of the CPU package which
63 is also known as the m 63 is also known as the maximum processor junction
64 temperature, Tjmax or 64 temperature, Tjmax or Tprochot.
65 temp2_crit_hyst Provides the hysteresi 65 temp2_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of
66 the CPU package. 66 the CPU package.
67 67
68 temp3_label "Tcontrol" 68 temp3_label "Tcontrol"
69 temp3_input Provides current Tcont 69 temp3_input Provides current Tcontrol temperature of the CPU
70 package which is also 70 package which is also known as Fan Temperature target.
71 Indicates the relative 71 Indicates the relative value from thermal monitor trip
72 temperature at which f 72 temperature at which fans should be engaged.
73 temp3_crit Provides Tcontrol crit 73 temp3_crit Provides Tcontrol critical value of the CPU package
74 which is same to Tjmax 74 which is same to Tjmax.
75 75
76 temp4_label "Tthrottle" 76 temp4_label "Tthrottle"
77 temp4_input Provides current Tthro 77 temp4_input Provides current Tthrottle temperature of the CPU
78 package. Used for thro 78 package. Used for throttling temperature. If this value
79 is allowed and lower t 79 is allowed and lower than Tjmax - the throttle will
80 occur and reported at 80 occur and reported at lower than Tjmax.
81 81
82 temp5_label "Tjmax" 82 temp5_label "Tjmax"
83 temp5_input Provides the maximum j 83 temp5_input Provides the maximum junction temperature, Tjmax of the
84 CPU package. 84 CPU package.
85 85
86 temp[6-N]_label Provides string "Core 86 temp[6-N]_label Provides string "Core X", where X is resolved core
87 number. 87 number.
88 temp[6-N]_input Provides current tempe 88 temp[6-N]_input Provides current temperature of each core.
89 89
90 ======================= ====================== 90 ======================= =======================================================
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