Re: cpu warning?

["Jonathan A. Kollasch" <jakllsch%kollasch.net@localhost>]

On Thu, Aug 26, 2010 at 06:29:33PM +0000, Jonathan A. Kollasch wrote:
> On Thu, Aug 26, 2010 at 10:24:03PM +0800, Rui-Xiang Guo wrote:
> > Hi, all.
> > Is there anyone know what kind of this issue?
> > [...]
> > NetBSD 5.1_RC3 (GENERIC) #0: Sat Jun 12 20:26:01 UTC 2010
> >         
> > builds%b8.netbsd.org@localhost:/home/builds/ab/netbsd-5-1-RC3/amd64/201006130031Z-
> > obj/home/builds/ab/netbsd-5-1-RC3/src/sys/arch/amd64/compile/GENERIC
> > total memory = 991 MB
> > avail memory = 945 MB
> > timecounter: Timecounters tick every 10.000 msec
> > timecounter: Timecounter "i8254" frequency 1193182 Hz quality 100
> > SMBIOS rev. 2.3 @ 0xf0000 (33 entries)
> >     ( )
> > mainbus0 (root)
> > cpu0 at mainbus0 apid 0: AMD 686-class, 1808MHz, id 0x20f42
> > cpu0: AMD PowerNow! Technology 1800 MHz
> > cpu0: available frequencies (Mhz): 800 1600 1800
> > cpu0: erratum 89 present
> > cpu0: WARNING: errata present, BIOS upgrade may be
> > cpu0: WARNING: necessary to ensure reliable operation
> > [...]
> 
> I'm fairly sure it's nothing to worry about.
> All my socket 754 machine exhibit this, and have
> no problems.

And that would be because the errata 89 workaround is
indicated by a "bit 3" and not the "third bit", which
is what we were looking for.

I believe this warning should be accurate as of
src/sys/arch/x86/include/specialreg.h rev 1.48
that I commited a few minutes ago.

Thanks for helping re-inspiring my curiosity about this.

        Jonathan Kollasch