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Re: [Qemu-devel] [PATCH 2/2] Add code to override IRQ 0 to INTI 2


From: Avi Kivity
Subject: Re: [Qemu-devel] [PATCH 2/2] Add code to override IRQ 0 to INTI 2
Date: Mon, 27 Oct 2008 22:02:09 +0200
User-agent: Thunderbird 2.0.0.16 (X11/20080723)

Avi Kivity wrote:

(what's irq 2 connected to now?)


Oh, of course irq 2 is only available on the ioapic; on the pic it is used for cascading.

If we can't find a free interrupt, we can always connect it to interrupt 5; that will reduce the number of pci interrupts to two. But we can implement apic mode and use lines 16-23 (if we add another ioapic, 16-47).

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.





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