linux-kernel - Re: [lm-sensors] [PATCH] hwmon: Add driver for VIA CPU core temperature

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Date:	Fri, 12 Jun 2009 09:57:24 -0500
From:	"Michael S. Zick" <lkml@...ethan.org>
To:	tomaz.mertelj@...st.arnes.si
Cc:	Harald Welte <HaraldWelte@...tech.com>,
	Jean Delvare <khali@...ux-fr.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, lm-sensors@...sensors.org
Subject: Re: [lm-sensors] [PATCH] hwmon: Add driver for VIA CPU core	temperature

On Fri June 12 2009, tomaz.mertelj@...st.arnes.si wrote:
> > > 
> > > Ah, 25 degrees C is room temperature - real hard for the junction 
> temperature
> > > to be 25 degrees C with power applied; lacking an infinitely perfect 
> heatsink.
> > > 
> > > Look for an "off by one" error in shifting or masking the value.
> > 
> > there is no shifting and the masking is 0xffffffff :)
> > 
> > it might be that the BIOS is doing something wrong when programming the
> > calibration MSR's at early botoup.  I would need the contents of MSR 
> > 0x1160 ... 0x116C as well as 0x1152 and 0x1153 to be able to determine 
> that.
> > 
> 
> This is what I get on VB7002.. vith C7-D cpu:
> 
> 
> DEBNAS:/home# sensors
> 
> via-cputemp-isa-0000
> Adapter: ISA adapter
> Core 0:      +27.0 C 
> 
> DEBNAS:/home# for r in 0x1160 0x1161 0x1162 0x1163 0x1164 0x1165 0x1166 
> 0x1167
> 0x1168 0x1169 0x116a 0x116b 0x116c 0x1152 0x1153 ; do ./rdmsr $r ; done
> MSR register 0x1160 => 08:04:98:10:b8:0b:6f:f4
> MSR register 0x1161 => 08:04:98:10:b8:0a:8f:f4
> MSR register 0x1162 => 08:04:98:10:b7:f7:7f:f4
> MSR register 0x1163 => 08:04:98:10:b7:f1:1f:f4
> MSR register 0x1164 => 08:04:98:10:b7:ee:cf:f4
> MSR register 0x1165 => 08:04:98:10:b8:0b:4f:f4
> MSR register 0x1166 => 08:04:98:10:b7:f7:7f:f4
> MSR register 0x1167 => 08:04:98:10:b7:ef:8f:f4
> MSR register 0x1168 => 08:04:98:10:b7:fc:3f:f4
> MSR register 0x1169 => 08:04:98:10:b8:0d:6f:f4
> MSR register 0x116a => 08:04:98:10:b7:f3:8f:f4
> MSR register 0x116b => 08:04:98:10:b8:0b:bf:f4
> MSR register 0x116c => 08:04:98:10:b8:00:6f:f4
> MSR register 0x1152 => 08:04:98:10:b7:f2:2f:f4
> MSR register 0x1153 => 08:04:98:10:b8:0b:3f:f4
> DEBNAS:/home#
> 
>

The author had a problem in that routine -
try this one (32bit machines only) -

Mike 
> Tomaz Mertelj
> 
> 
> 



View attachment "rdmsrll.c" of type "text/x-csrc" (783 bytes)