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Kernel driver coretemp
======================
Supported chips:
* All Intel Core family
Prefix: 'coretemp'
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CPUID: family 0x6, models 0xe (Pentium M DC), 0xf (Core 2 DC 65nm),
0x16 (Core 2 SC 65nm), 0x17 (Penryn 45nm),
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0x1a (Nehalem), 0x1c (Atom), 0x1e (Lynnfield)
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Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual
Volume 3A: System Programming Guide
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http://softwarecommunity.intel.com/Wiki/Mobility/720.htm
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Author: Rudolf Marek
Description
-----------
This driver permits reading temperature sensor embedded inside Intel Core CPU.
Temperature is measured in degrees Celsius and measurement resolution is
1 degree C. Valid temperatures are from 0 to TjMax degrees C, because
the actual value of temperature register is in fact a delta from TjMax.
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Temperature known as TjMax is the maximum junction temperature of processor,
which depends on the CPU model. See table below. At this temperature, protection
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mechanism will perform actions to forcibly cool down the processor. Alarm
may be raised, if the temperature grows enough (more than TjMax) to trigger
the Out-Of-Spec bit. Following table summarizes the exported sysfs files:
temp1_input - Core temperature (in millidegrees Celsius).
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temp1_max - All cooling devices should be turned on (on Core2).
temp1_crit - Maximum junction temperature (in millidegrees Celsius).
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temp1_crit_alarm - Set when Out-of-spec bit is set, never clears.
Correct CPU operation is no longer guaranteed.
temp1_label - Contains string "Core X", where X is processor
number.
The TjMax temperature is set to 85 degrees C if undocumented model specific
register (UMSR) 0xee has bit 30 set. If not the TjMax is 100 degrees C as
(sometimes) documented in processor datasheet.
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Appendix A. Known TjMax lists (TBD):
Some information comes from ark.intel.com
Process Processor TjMax(C)
32nm Core i3/i5/i7 Processors
i7 660UM/640/620, 640LM/620, 620M, 610E 105
i5 540UM/520/430, 540M/520/450/430 105
i3 330E, 370M/350/330 90 rPGA, 105 BGA
i3 330UM 105
32nm Core i7 Extreme Processors
980X 100
32nm Celeron Processors
U3400 105
P4505/P4500 90
45nm Xeon Processors 5400 Quad-Core
X5492, X5482, X5472, X5470, X5460, X5450 85
E5472, E5462, E5450/40/30/20/10/05 85
L5408 95
L5430, L5420, L5410 70
45nm Xeon Processors 5200 Dual-Core
X5282, X5272, X5270, X5260 90
E5240 90
E5205, E5220 70, 90
L5240 70
L5238, L5215 95
45nm Atom Processors
D525/510/425/410 100
Z560/550/540/530P/530/520PT/520/515/510PT/510P 90
Z510/500 90
N475/470/455/450 100
N280/270 90
330/230 125
45nm Core2 Processors
Solo ULV SU3500/3300 100
T9900/9800/9600/9550/9500/9400/9300/8300/8100 105
T6670/6500/6400 105
T6600 90
SU9600/9400/9300 105
SP9600/9400 105
SL9600/9400/9380/9300 105
P9700/9600/9500/8800/8700/8600/8400/7570 105
P7550/7450 90
45nm Core2 Quad Processors
Q9100/9000 100
45nm Core2 Extreme Processors
X9100/9000 105
QX9300 100
45nm Core i3/i5/i7 Processors
i7 940XM/920 100
i7 840QM/820/740/720 100
45nm Celeron Processors
SU2300 100
900 105
65nm Core2 Duo Processors
Solo U2200, U2100 100
U7700/7600/7500 100
T7800/7700/7600/7500/7400/7300/7250/7200/7100 100
T5870/5670/5600/5550/5500/5470/5450/5300/5270 100
T5250 100
T5800/5750/5200 85
L7700/7500/7400/7300/7200 100
65nm Core2 Extreme Processors
X7900/7800 100
65nm Core Duo Processors
U2500/2400 100
T2700/2600/2450/2400/2350/2300E/2300/2250/2050 100
L2500/2400/2300 100
65nm Core Solo Processors
U1500/1400/1300 100
T1400/1350/1300/1250 100
65nm Xeon Processors 5000 Quad-Core
X5000 90-95
E5000 80
L5000 70
L5318 95
65nm Xeon Processors 5000 Dual-Core
5080, 5063, 5060, 5050, 5030 80-90
5160, 5150, 5148, 5140, 5130, 5120, 5110 80
L5138 100
65nm Celeron Processors
T1700/1600 100
560/550/540/530 100
