Re: [Qemu-devel] [RFC][PATCH 11/45] msi: Factor out delivery hook

[Avi Kivity]

On 10/17/2011 01:29 PM, Jan Kiszka wrote:
> >>
> >> APIC is x86-specific, MSI is not. I think Xen will also want to make use
> >> of this hook. I originally though of using it for the KVM in-kernel
> >> models as well, but I will now establish a callback at APIC-level
> >> (upstream will look differently from qemu-kvm in this regard).
> >>
> > 
> > But you still have to handle it the the platform interrupt controller
> > (or whatever processes msi messages) since you can still DMA there.  So
> > you don't get away from doing it there anyway.
>
> Right, but that's the slow path (which is still handled - on x86 via the
> MMIO region the APIC still maintains).
>

It's handled by caching and immediately uncaching the MSIMessage/kvm
route relationship?

Can you post a git tree?  It will be easier for me to understand the
whole thing this way.

-- 
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