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Date: Wed, 22 Nov 2000 18:49:29 +0100 (MET)
From: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Reply-To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
cc: "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@chiara.elte.hu>,
        linux-kernel@vger.kernel.org
Subject: Re: Linux 2.4.0test11-ac1
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Organization: Technical University of Gdansk
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On Wed, 22 Nov 2000, Alan Cox wrote:

> I think it reports 1.1 apics from memory. Its simply hardcoded in the bios
> rather than the configurable flash area.

 So we might check for it.  Good!

> The following change should make all of this work
> 
> 	if(vendor!=INTEL && !has_apic)
> 		/* No SMP */

 And suddenly certain i486 systems do not work anymore?  Well, I haven't
actually heard of an i486 SMP system running Linux so far (maybe they just
work fine, so no reports).  But we could try the following, instead:

	if (boot_cpu_id != -1U
	    && APIC_INTEGRATED(apic_version[boot_cpu_id]) && !has_apic)
		/* No SMP */

It should filter broken MP-tables and work fine on all 82489DX-based
systems.  I'll have a patch soon if we agree on this solution.

  Maciej

-- 
+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+--------------------------------------------------------------+
+        e-mail: macro@ds2.pg.gda.pl, PGP key available        +

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