[PATCH 6/7] MPIC MSI allocator

Benjamin Herrenschmidt benh at kernel.crashing.org
Tue Apr 24 19:51:45 EST 2007

On Tue, 2007-04-24 at 11:44 +0200, Segher Boessenkool wrote:
> >> First-gen G5's need that just as well, they just don't
> >> have such interrupts on the default system configuration,
> >> as far as I remember.
> >
> > They didn't have an HT APIC or if they had one, they didn't enable it
> > (they probably did in the tunnel).
> Yes, the two HT APICs on the tunnel were enabled.
> > They didn't use the U3 MPIC as an HT
> > IRQ master, thus it's irrelevant.
> They did for the plugin PCI-X slots (well, it's chained
> to another MPIC, but you still need the workaround).

No you didn't. The slots IRQ lines were physically routed to GPIOs on
the southbridge MPIC. The -only- thing the northbridge MPIC was useful
for was the NB internal interrupts (like the i2c one).

> > Anyway, there is no point in this
> > discussion :-)
> Yeah, the new name for CONFIG_BROKEN_U3 is fine
> no matter what :-)
> Segher

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