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SubjectRe: Linux 2.4.0test11-ac1
On Tue, 21 Nov 2000, Alan Cox wrote:

> Quite a few dual pentium socket 7 boards report dual cpu and apic in the
> MP table regardless of the capabilities of the CPU installed. Its apparently
> legal to do so. There is an apic capability flag that should be tested before

It's not legal -- the MPS is very explicit the MP-table must reflect a
real configuration.

> making any assumptions about APIC availability on a processor.

OK, but how does it handle the 82489DX? There are valid configurations
using this kind of APIC, including Pentium P54C ones...

> And yes some boards crash otherwise.

Hmm, the only solution I can see is to check the APIC version in the
MP-table and only if an integrated version is reported then check
capabilities. But can we trust the version reported given that amount of
brokenness out there?


+ Maciej W. Rozycki, Technical University of Gdansk, Poland +
+ e-mail:, PGP key available +

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