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Re: [Xen-devel] Re: [PATCH] xen: fix interrupt routing

To: Alexander Graf <agraf@xxxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH] xen: fix interrupt routing
From: Avi Kivity <avi@xxxxxxxxxx>
Date: Wed, 15 Jun 2011 19:34:25 +0300
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Jan Kiszka <jan.kiszka@xxxxxxxxxxx>, "qemu-devel@xxxxxxxxxx" <qemu-devel@xxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>, Isaku Yamahata <yamahata@xxxxxxxxxxxxx>, Anthony Liguori <anthony@xxxxxxxxxxxxx>
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On 06/15/2011 11:24 AM, Alexander Graf wrote:
I'm actually not quite sure what exactly he's describing here. But if it's 
bypassing the bus logic, it's not a normal PCI device :). Sure, there are 
special case devices that also expose a PCI interface. But real PCI cards that 
you plug in onto the PCI bus can't bypass the interrupt logic of the bus, as 
the only interrupt wires they have go to the bus. And since the PCI adapters we 
use in PC machines in Qemu are all non-special, guests can possibly choke on 

There actually is a special device in qemu - acpi power management is configured as a PCI device, but its interrupt is hard-wired to gsi 9 and is edge-triggered (so it can't share the irq line).

I other devices that are special in this regard to also be part of the chipset, not devices you can plug into arbitrary slots.

error compiling committee.c: too many arguments to function

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