Re: [Xen-devel] [RFC 09/14] xen/xsm: flask: MSI is PCI specific

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2014-03-14 at 18:15 +0000, Julien Grall wrote:
> Hi Ian,
> 
> On 03/14/2014 05:25 PM, Ian Campbell wrote:
> > On Thu, 2014-03-13 at 14:40 +0000, Julien Grall wrote:
> >>
> >> Right, nr_static_irqs is set to 1024 on ARM. For now every IRQs, are not
> >> higher than this number.
> > 
> > This will change before long though. Would HAVE_MSI_IRQS be a better
> > name for this particular arch-configurable? After all PCI without MSI is
> > plausible isn't it? (well, maybe not in the modern world)
> 
> Most of PCI passthrough code is relying that MSI is also implemented.
> Futhermore, I think the plan for ARM is to support both PCI and MSI.

Right, but we might get PCI support first and separately I think?

> That's why I chose HAS_PCI.

I suppose we can revisit it easily enough if it causes problems.

Ian.



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