linux-kernel - Re: What is the best way to identify a new x86 processor that does not implement the CPUID instruction?

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Message-ID: <df9815e70808051933l32798d4y913e16872c256a88@mail.gmail.com>
Date:	Wed, 6 Aug 2008 10:33:13 +0800
From:	"Jike Song" <albcamus@...il.com>
To:	"David Wilson" <mcs6502@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: What is the best way to identify a new x86 processor that does not implement the CPUID instruction?

On Tue, Aug 5, 2008 at 3:08 PM, David Wilson <mcs6502@...il.com> wrote:
> I have thought of a couple of schemes but am not really keen on either:
>
> 1) Clock speed - the SoC runs at 300+ MHz while the Cyrix part is < 100 MHz
at which speed this Soc is running when being recognized as Cyrix part by Linux?

> 2) Look at the PCI VID/PID for the north bridge as this is part of the CPU die.
>

As you said, since the manufacturer has provided some codes to tune
the CPU speed, did they provide any method to identify the CPU without
a cpuid function?
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