On 08/26/2009 07:03 PM, Gerd Hoffmann wrote:
On 08/09/09 18:44, Avi Kivity wrote:
Instead of calling the IOAPIC from the PIC, raise IOAPIC irqs via
the ISA bus.
As a side effect, IOAPIC lines 16-23 are enabled.
Now we probably need some acpi magic to tell the guest OS that there
are a few more IRQ lines?
I wanted to route the PCI IRQs to those lines (and have eight links
instead of four). Now I don't think it's worthwhile, as every guest
that is interesting from a performance point of view has MSI support.
So I think we should just leave these lines as is, terminated with a
4.7K resistor to avoid picking up noise.