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gerrit-public.fairphone.software / kernel / msm-4.9 / 437b086b31801f307e36e6cc887ce32f4df26071 / . / Documentation / hwmon / coretemp
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Rudolf Marekd58ee0562007-05-08 17:22:02 +0200[diff] [blame]1Kernel driver coretemp
2======================
3
4Supported chips:
5 * All Intel Core family
6 Prefix: 'coretemp'
Rudolf Marekeccfed42009-09-23 22:59:42 +0200[diff] [blame]7 CPUID: family 0x6, models 0xe (Pentium M DC), 0xf (Core 2 DC 65nm),
8 0x16 (Core 2 SC 65nm), 0x17 (Penryn 45nm),
Jean Delvarefcc14ac2012-06-17 18:05:05 +0200[diff] [blame]9 0x1a (Nehalem), 0x1c (Atom), 0x1e (Lynnfield),
Guenter Roeck55929062012-06-17 18:05:05 +0200[diff] [blame]10 0x26 (Tunnel Creek Atom), 0x27 (Medfield Atom),
11 0x36 (Cedar Trail Atom)
Rudolf Marekd58ee0562007-05-08 17:22:02 +0200[diff] [blame]12 Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual
13 Volume 3A: System Programming Guide
Rudolf Marekae770152008-01-18 00:50:04 +0100[diff] [blame]14 http://softwarecommunity.intel.com/Wiki/Mobility/720.htm
Rudolf Marekd58ee0562007-05-08 17:22:02 +0200[diff] [blame]15
16Author: Rudolf Marek
17
18Description
19-----------
Durgadoss R199e0de2011-05-20 01:29:35 +0530[diff] [blame]20This driver permits reading the DTS (Digital Temperature Sensor) embedded
21inside Intel CPUs. This driver can read both the per-core and per-package
22temperature using the appropriate sensors. The per-package sensor is new;
23as of now, it is present only in the SandyBridge platform. The driver will
24show the temperature of all cores inside a package under a single device
25directory inside hwmon.
Rudolf Marekd58ee0562007-05-08 17:22:02 +0200[diff] [blame]26
Rudolf Marekd58ee0562007-05-08 17:22:02 +0200[diff] [blame]27Temperature is measured in degrees Celsius and measurement resolution is
281 degree C. Valid temperatures are from 0 to TjMax degrees C, because
29the actual value of temperature register is in fact a delta from TjMax.
30
Chen Gongf3cffe42010-08-09 17:21:10 -0700[diff] [blame]31Temperature known as TjMax is the maximum junction temperature of processor,
32which depends on the CPU model. See table below. At this temperature, protection
Rudolf Marekd58ee0562007-05-08 17:22:02 +0200[diff] [blame]33mechanism will perform actions to forcibly cool down the processor. Alarm
34may be raised, if the temperature grows enough (more than TjMax) to trigger
35the Out-Of-Spec bit. Following table summarizes the exported sysfs files:
36
Durgadoss R199e0de2011-05-20 01:29:35 +0530[diff] [blame]37All Sysfs entries are named with their core_id (represented here by 'X').
38tempX_input - Core temperature (in millidegrees Celsius).
39tempX_max - All cooling devices should be turned on (on Core2).
40tempX_crit - Maximum junction temperature (in millidegrees Celsius).
41tempX_crit_alarm - Set when Out-of-spec bit is set, never clears.
Rudolf Marekd58ee0562007-05-08 17:22:02 +0200[diff] [blame]42 Correct CPU operation is no longer guaranteed.
Durgadoss R199e0de2011-05-20 01:29:35 +0530[diff] [blame]43tempX_label - Contains string "Core X", where X is processor
44 number. For Package temp, this will be "Physical id Y",
45 where Y is the package number.
Rudolf Marekd58ee0562007-05-08 17:22:02 +0200[diff] [blame]46
Jean Delvarea45a8c82011-09-16 21:24:02 +0200[diff] [blame]47On CPU models which support it, TjMax is read from a model-specific register.
48On other models, it is set to an arbitrary value based on weak heuristics.
49If these heuristics don't work for you, you can pass the correct TjMax value
50as a module parameter (tjmax).
Chen Gongf3cffe42010-08-09 17:21:10 -0700[diff] [blame]51
52Appendix A. Known TjMax lists (TBD):
53Some information comes from ark.intel.com
54
55Process Processor TjMax(C)
56
Guenter Roeck813441f2012-06-17 18:05:06 +0200[diff] [blame]5722nm Core i5/i7 Processors
58 i7 3920XM, 3820QM, 3720QM, 3667U, 3520M 105
59 i5 3427U, 3360M/3320M 105
60 i7 3770/3770K 105
61 i5 3570/3570K, 3550, 3470/3450 105
62 i7 3770S 103
63 i5 3570S/3550S, 3475S/3470S/3450S 103
64 i7 3770T 94
65 i5 3570T 94
66 i5 3470T 91
67
Chen Gongf3cffe42010-08-09 17:21:10 -0700[diff] [blame]6832nm Core i3/i5/i7 Processors
Guenter Roeck9e3970f2012-11-16 21:55:24 -0800[diff] [blame]69 i7 2600 98
Chen Gongf3cffe42010-08-09 17:21:10 -0700[diff] [blame]70 i7 660UM/640/620, 640LM/620, 620M, 610E 105
71 i5 540UM/520/430, 540M/520/450/430 105
72 i3 330E, 370M/350/330 90 rPGA, 105 BGA
73 i3 330UM 105
74
7532nm Core i7 Extreme Processors
76 980X 100
77
7832nm Celeron Processors
79 U3400 105
80 P4505/P4500 90
81
Jean Delvarefcc14ac2012-06-17 18:05:05 +0200[diff] [blame]8232nm Atom Processors
Guenter Roeck9e3970f2012-11-16 21:55:24 -0800[diff] [blame]83 S1260/1220 95
84 S1240 102
Jean Delvarefcc14ac2012-06-17 18:05:05 +0200[diff] [blame]85 Z2460 90
Guenter Roeck9e3970f2012-11-16 21:55:24 -0800[diff] [blame]86 Z2760 90
Guenter Roeck55929062012-06-17 18:05:05 +0200[diff] [blame]87 D2700/2550/2500 100
88 N2850/2800/2650/2600 100
Jean Delvarefcc14ac2012-06-17 18:05:05 +0200[diff] [blame]89
Chen Gongf3cffe42010-08-09 17:21:10 -0700[diff] [blame]9045nm Xeon Processors 5400 Quad-Core
91 X5492, X5482, X5472, X5470, X5460, X5450 85
92 E5472, E5462, E5450/40/30/20/10/05 85
93 L5408 95
94 L5430, L5420, L5410 70
95
9645nm Xeon Processors 5200 Dual-Core
97 X5282, X5272, X5270, X5260 90
98 E5240 90
99 E5205, E5220 70, 90
100 L5240 70
101 L5238, L5215 95
102
10345nm Atom Processors
104 D525/510/425/410 100
Guenter Roeck9e3970f2012-11-16 21:55:24 -0800[diff] [blame]105 K525/510/425/410 100
Guenter Roeck04a87a02012-10-09 12:52:18 -0700[diff] [blame]106 Z670/650 90
Chen Gongf3cffe42010-08-09 17:21:10 -0700[diff] [blame]107 Z560/550/540/530P/530/520PT/520/515/510PT/510P 90
108 Z510/500 90
Guenter Roeck04a87a02012-10-09 12:52:18 -0700[diff] [blame]109 N570/550 100
Chen Gongf3cffe42010-08-09 17:21:10 -0700[diff] [blame]110 N475/470/455/450 100
111 N280/270 90
112 330/230 125
Jean Delvarefcc14ac2012-06-17 18:05:05 +0200[diff] [blame]113 E680/660/640/620 90
114 E680T/660T/640T/620T 110
Guenter Roeck9e3970f2012-11-16 21:55:24 -0800[diff] [blame]115 E665C/645C 90
116 E665CT/645CT 110
Guenter Roeck1102dca2012-10-09 13:23:57 -0700[diff] [blame]117 CE4170/4150/4110 110
Guenter Roeck9e3970f2012-11-16 21:55:24 -0800[diff] [blame]118 CE4200 series unknown
119 CE5300 series unknown
Chen Gongf3cffe42010-08-09 17:21:10 -0700[diff] [blame]120
12145nm Core2 Processors
122 Solo ULV SU3500/3300 100
123 T9900/9800/9600/9550/9500/9400/9300/8300/8100 105
124 T6670/6500/6400 105
125 T6600 90
126 SU9600/9400/9300 105
127 SP9600/9400 105
128 SL9600/9400/9380/9300 105
129 P9700/9600/9500/8800/8700/8600/8400/7570 105
130 P7550/7450 90
131
13245nm Core2 Quad Processors
133 Q9100/9000 100
134
13545nm Core2 Extreme Processors
136 X9100/9000 105
137 QX9300 100
138
13945nm Core i3/i5/i7 Processors
140 i7 940XM/920 100
141 i7 840QM/820/740/720 100
142
14345nm Celeron Processors
144 SU2300 100
145 900 105
146
14765nm Core2 Duo Processors
148 Solo U2200, U2100 100
149 U7700/7600/7500 100
150 T7800/7700/7600/7500/7400/7300/7250/7200/7100 100
151 T5870/5670/5600/5550/5500/5470/5450/5300/5270 100
152 T5250 100
153 T5800/5750/5200 85
154 L7700/7500/7400/7300/7200 100
155
15665nm Core2 Extreme Processors
157 X7900/7800 100
158
15965nm Core Duo Processors
160 U2500/2400 100
161 T2700/2600/2450/2400/2350/2300E/2300/2250/2050 100
162 L2500/2400/2300 100
163
16465nm Core Solo Processors
165 U1500/1400/1300 100
166 T1400/1350/1300/1250 100
167
16865nm Xeon Processors 5000 Quad-Core
169 X5000 90-95
170 E5000 80
171 L5000 70
172 L5318 95
173
17465nm Xeon Processors 5000 Dual-Core
175 5080, 5063, 5060, 5050, 5030 80-90
176 5160, 5150, 5148, 5140, 5130, 5120, 5110 80
177 L5138 100
178
17965nm Celeron Processors
180 T1700/1600 100
181 560/550/540/530 100