Re: PCIE

[H. Peter Anvin]

David Miller wrote:
> 
>> i presume then i shouldn't be using IRQF_SHARED, if using MSI.
> 
> That's actually a really good question.
> 
> It is likely architecture dependant whether the PCI controller wires
> unique MSI interrupts to shared cpu interrupt lines.
> 
> I can imagine many systems where the cpu simply doesn't have enough
> interrupt pins to uniquely identify every possible MSI interrupt
> source.

There are systems which only get a single bit indication that an MSI has
happened.

Presumably we need something like IRQF_MSI which can be set as
appropriate depending on the architecture?

	-hpa
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