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    SubjectRe: [PATCH 2/2] hwmon: (coretemp) Get TjMax value from MSR
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    Date
    On Fri, 2010-05-07 at 17:59 +0800, Huaxu Wan wrote: 
    > The MSR IA32_TEMPERATURE_TARGET contains the TjMax value in the newer
    > processers.

    I know that TjMax on my system is 85, and now coretemp reports wrong
    temperatures.
    First of all BIOS using stupid tricks actualy reports CPU temperature
    through ACPI, and assuming it was correct TjMax is 85.
    It also shuts down the system if I 'lie' to it that cpu temperature is
    85C.

    Coretemp was working correctly in 2.6.34

    cat /proc/cpuinfo

    processor : 0
    vendor_id : GenuineIntel
    cpu family : 6
    model : 15
    model name : Intel(R) Core(TM)2 Duo CPU T5450 @ 1.66GHz
    stepping : 13
    cpu MHz : 1667.000
    cache size : 2048 KB
    physical id : 0
    siblings : 2
    core id : 0
    cpu cores : 2
    apicid : 0
    initial apicid : 0
    fpu : yes
    fpu_exception : yes
    cpuid level : 10
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm lahf_lm
    bogomips : 3324.70
    clflush size : 64
    cache_alignment : 64
    address sizes : 36 bits physical, 48 bits virtual
    power management:

    processor : 1
    vendor_id : GenuineIntel
    cpu family : 6
    model : 15
    model name : Intel(R) Core(TM)2 Duo CPU T5450 @ 1.66GHz
    stepping : 13
    cpu MHz : 1667.000
    cache size : 2048 KB
    physical id : 0
    siblings : 2
    core id : 1
    cpu cores : 2
    apicid : 1
    initial apicid : 1
    fpu : yes
    fpu_exception : yes
    cpuid level : 10
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm lahf_lm
    bogomips : 3324.99
    clflush size : 64
    cache_alignment : 64
    address sizes : 36 bits physical, 48 bits virtual
    power management:


    Best regards,
    Maxim Levitsky



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