Re: How to read BIOS information

[Madhukar Mythri]

Thanks alot for all...

Regards,
Madhukar Mythri.


Richard Mittendorfer wrote:

> Also sprach Stefan Smietanowski <stesmi@xxxxxxxxxx> (Tue, 09 May 2006
> 14:29:01 +0200):
>  
>
> > Alan Cox wrote:
> >    
> >
> > > On Maw, 2006-05-09 at 10:53 +0530, Madhukar Mythri wrote:
> > >
> > >      
> > >
> > > > yeah, your are correct. but, the thing is my superiors want, even
> > > >        
> > > if  >kernel not reconize/use HT, we have to capture it from BIOS...
> > >      
> > >
> > > > Thats why i asked as, how to read BIOS information?
> > > >        
> > > You ask the BIOS vendor for the exact board in question.
> > >
> > > If you want to ask the processor itself then you can use the model
> > > specific registers. These are accessible via /dev/cpu/<cpuid>/msr so
> > > you can perform the Intel recommended sequence for checking if the
> > > processor has HT enabled.
> > >
> > > It might be simpler to look in /proc/cpuinfo if you just need the
> > > basic information
> > >      
> > He's actually asking if the BIOS has turned on HT, not if some other
> > means has...
> >
> > BUT, the only thing I can think of is turning OFF HT in the BIOS,
> > reading the CMOS, storing it somewhere, turning ON HT, storing
> > that somewhere and comparing them. Then he'll know that in his
> > specific BIOS revision on his specific mainboard that bit is
> > stored in one specific place and he can go from there.
> >
> > Messy, definately not recommended, stupid but hey, if the bosses
> > ask for it and you gotta give it ..
> >
> > Just make triple sure you tell them that if you upgrade the BIOS
> > the test might fail or if you change mainboard, etc.
> >    
>
> IIRC the chipset should know about this?
> Something like hex /sys/devices/pci0000:0/0000:00:00.0/config and
> comparing registers with the chipset's datasheet?
>
>  
>
> > // Stefan
> >    
>
> sl ritch
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