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Re: [Qemu-devel] [Qemu-ppc] [PATCH] RFCv3 kvm irqfd: support msimessage


From: Alexey Kardashevskiy
Subject: Re: [Qemu-devel] [Qemu-ppc] [PATCH] RFCv3 kvm irqfd: support msimessage to irq translation in PHB
Date: Sun, 30 Jun 2013 17:09:48 +1000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6

On 06/30/2013 04:32 PM, Benjamin Herrenschmidt wrote:
> On Sun, 2013-06-30 at 10:59 +1000, Alexey Kardashevskiy wrote:
>>> 1) A PCI bus function to do the MSI -> virq mapping
>>> 2) On x86 (and e500), this is implemented by calling 
>>> kvm_irqchip_add_msi_route()
>>> 3) On pseries, this just returns msi->data
>>>
>>> Perhaps (2) can just be the default PCI bus implementation to simplify 
>>> things.
>>
>>
>> hw/pci/pci.c does not have any kvm code yet and I would like not to be the
>> first person who tries adding this there :)
>> But ok, I'll do it.
> 
> Unless I'm confused (which is very possible) I seem to remember that there was
> duplication of that MSI / KVM mapping between virtio-pci and vfio as well,
> so it makes sense to move it to the PCI code.

No, you are right and this is what Anthony is telling me to do.


-- 
Alexey



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