linux/Documentation/hwmon/coretemp
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   1Kernel driver coretemp
   2======================
   3
   4Supported chips:
   5  * All Intel Core family
   6    Prefix: 'coretemp'
   7    CPUID: family 0x6, models 0xe (Pentium M DC), 0xf (Core 2 DC 65nm),
   8                              0x16 (Core 2 SC 65nm), 0x17 (Penryn 45nm),
   9                              0x1a (Nehalem), 0x1c (Atom), 0x1e (Lynnfield),
  10                              0x26 (Tunnel Creek Atom), 0x27 (Medfield Atom),
  11                              0x36 (Cedar Trail Atom)
  12    Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual
  13               Volume 3A: System Programming Guide
  14               http://softwarecommunity.intel.com/Wiki/Mobility/720.htm
  15
  16Author: Rudolf Marek
  17
  18Description
  19-----------
  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.
  26
  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
  31Temperature known as TjMax is the maximum junction temperature of processor,
  32which depends on the CPU model. See table below. At this temperature, protection
  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
  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.
  42                   Correct CPU operation is no longer guaranteed.
  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.
  46
  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).
  51
  52Appendix A. Known TjMax lists (TBD):
  53Some information comes from ark.intel.com
  54
  55Process         Processor                                       TjMax(C)
  56
  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
  6832nm            Core i3/i5/i7 Processors
  69                i7 660UM/640/620, 640LM/620, 620M, 610E         105
  70                i5 540UM/520/430, 540M/520/450/430              105
  71                i3 330E, 370M/350/330                           90 rPGA, 105 BGA
  72                i3 330UM                                        105
  73
  7432nm            Core i7 Extreme Processors
  75                980X                                            100
  76
  7732nm            Celeron Processors
  78                U3400                                           105
  79                P4505/P4500                                     90
  80
  8132nm            Atom Processors
  82                Z2460                                           90
  83                D2700/2550/2500                                 100
  84                N2850/2800/2650/2600                            100
  85
  8645nm            Xeon Processors 5400 Quad-Core
  87                X5492, X5482, X5472, X5470, X5460, X5450        85
  88                E5472, E5462, E5450/40/30/20/10/05              85
  89                L5408                                           95
  90                L5430, L5420, L5410                             70
  91
  9245nm            Xeon Processors 5200 Dual-Core
  93                X5282, X5272, X5270, X5260                      90
  94                E5240                                           90
  95                E5205, E5220                                    70, 90
  96                L5240                                           70
  97                L5238, L5215                                    95
  98
  9945nm            Atom Processors
 100                D525/510/425/410                                100
 101                Z560/550/540/530P/530/520PT/520/515/510PT/510P  90
 102                Z510/500                                        90
 103                N475/470/455/450                                100
 104                N280/270                                        90
 105                330/230                                         125
 106                E680/660/640/620                                90
 107                E680T/660T/640T/620T                            110
 108
 10945nm            Core2 Processors
 110                Solo ULV SU3500/3300                            100
 111                T9900/9800/9600/9550/9500/9400/9300/8300/8100   105
 112                T6670/6500/6400                                 105
 113                T6600                                           90
 114                SU9600/9400/9300                                105
 115                SP9600/9400                                     105
 116                SL9600/9400/9380/9300                           105
 117                P9700/9600/9500/8800/8700/8600/8400/7570        105
 118                P7550/7450                                      90
 119
 12045nm            Core2 Quad Processors
 121                Q9100/9000                                      100
 122
 12345nm            Core2 Extreme Processors
 124                X9100/9000                                      105
 125                QX9300                                          100
 126
 12745nm            Core i3/i5/i7 Processors
 128                i7 940XM/920                                    100
 129                i7 840QM/820/740/720                            100
 130
 13145nm            Celeron Processors
 132                SU2300                                          100
 133                900                                             105
 134
 13565nm            Core2 Duo Processors
 136                Solo U2200, U2100                               100
 137                U7700/7600/7500                                 100
 138                T7800/7700/7600/7500/7400/7300/7250/7200/7100   100
 139                T5870/5670/5600/5550/5500/5470/5450/5300/5270   100
 140                T5250                                           100
 141                T5800/5750/5200                                 85
 142                L7700/7500/7400/7300/7200                       100
 143
 14465nm            Core2 Extreme Processors
 145                X7900/7800                                      100
 146
 14765nm            Core Duo Processors
 148                U2500/2400                                      100
 149                T2700/2600/2450/2400/2350/2300E/2300/2250/2050  100
 150                L2500/2400/2300                                 100
 151
 15265nm            Core Solo Processors
 153                U1500/1400/1300                                 100
 154                T1400/1350/1300/1250                            100
 155
 15665nm            Xeon Processors 5000 Quad-Core
 157                X5000                                           90-95
 158                E5000                                           80
 159                L5000                                           70
 160                L5318                                           95
 161
 16265nm            Xeon Processors 5000 Dual-Core
 163                5080, 5063, 5060, 5050, 5030                    80-90
 164                5160, 5150, 5148, 5140, 5130, 5120, 5110        80
 165                L5138                                           100
 166
 16765nm            Celeron Processors
 168                T1700/1600                                      100
 169                560/550/540/530                                 100
 170
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