Re: Possible PCI subsystem bug in 2.4

Maciej W. Rozycki (macro@ds2.pg.gda.pl)
Tue, 8 May 2001 18:01:12 +0200 (MET DST)


On 4 May 2001, Eric W. Biederman wrote:

> The example that sticks out in my head is we rely on the MP table to
> tell us if the local apic is in pic_mode or in virtual wire mode.
> When all we really have to do is ask it.

You can't. IMCR is write-only and may involve chipset-specific
side-effects. Then even if IMCR exists, a system's firmware might have
chosen the virtual wire mode for whatever reason (e.g. broken hardware).

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

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