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From: "Sebastian Herbszt" <herbszt@gmx.de>
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Subject: Re: [Qemu-devel] seabios: missing DMI type 4 entry if -cpu parameter
	is used
Date: Mon, 23 Nov 2009 19:33:40 +0100
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To: Gleb Natapov <gleb@redhat.com>
Cc: Kevin O'Connor <kevin@koconnor.net>, qemu-devel@nongnu.org

Gleb Natapov wrote:
> On Sun, Nov 22, 2009 at 06:05:02PM +0100, Sebastian Herbszt wrote:
>> v0.11.0-rc0-1677:
>> use -cpu pentium and check SMBIOS tables. DMI type 4 entry is missing.
>> Works with Bochs bios.
>> 
> See two problems here. First one in seabios (patch attached). And the
> second one in QEMU. Why pentium cpu type lacks apic? Specifying 
> -cpu pentium,+apic works with current seabios without the patch.

The "Pentium Processor Family Developer's Manual, Volume 3: Architecture
and Programming Manual" says the following in Chapter 19.3:

"APIC IS SUPPORTED ONLY ON PENTIUM PROCESSOR (735\90, 815\100,
1000\120, 1110\133) AND FUTURE PROLIFERATIONS AND UPGRADES."

So it seems not all pentium cpus have an apic. No clue which model and stepping
those are so can't compare to what qemu claims to provide.

- Sebastian