Re: [Xen-devel] [BUG] panic: "IO-APIC + timer doesn't work" - several people have reproduced

[Jason Andryuk <jandryuk@xxxxxxxxx>]

> > >>> One other thing that might be noteworthy.  Linux only prints ACPI IRQ0
> > >>> and IRQ9 used by override where Xen lists IRQ 0, 2 & 9.
> > >> Huh - this is supposed to come directly from the ACPI tables, so Linux
> > >> and Xen should be using the same source of information.

Both Xen and Linux only see two ACPI overrides (0 & 9) from the
tables.  However the Xen logic in mp_config_acpi_legacy_irqs() thinks
IRQ2 is an override
irq 2: irq->mpc_srcbus 0, irq->mpc_srcbusirq 0, irq->mpc_dstapic 2,
intsrc.mpc_dstapic 2
Matches
((irq->mpc_dstapic == intsrc.mpc_dstapic) &&
                                (irq->mpc_dstirq == i))

i is 2, so irq->mpc_dstirq must be as well.

Regards,
Jason

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