Re: [patch] PIII/Katmai & FXSAVE support, disable serial-#, 2.2.2

Jakub Jelinek (jj@sunsite.ms.mff.cuni.cz)
Wed, 3 Mar 1999 20:12:25 +0100 (CET)

>
> On Wed, 3 Mar 1999, Jakub Jelinek wrote:
>
> > This is read from the kernel and comes from PROM, but a userland program does not
> > have a direct access to anything like that.
>
> well, there is hostid ...

And guess what it gives you? 4 bytes from IDPROM, which you can change in
PROM mode and you read it by means of the OS, so the OS can tell you any
value it wants to. That's completely different to instruction telling CPU
serial id.

Cheers,
Jakub
___________________________________________________________________
Jakub Jelinek | jj@sunsite.mff.cuni.cz | http://sunsite.mff.cuni.cz
Administrator of SunSITE Czech Republic, MFF, Charles University
___________________________________________________________________
UltraLinux | http://ultra.linux.cz/ | http://ultra.penguin.cz/
Linux version 2.2.2 on a sparc64 machine (3958.37 BogoMips)
___________________________________________________________________

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