[Qemu-devel] Re: [PATCH 08/10] ahci: add ahci emulation

[Roedel, Joerg]

On Fri, Nov 19, 2010 at 04:12:43AM -0500, Gerd Hoffmann wrote:
> >>> +static void ahci_check_irq(AHCIState *s)
> >>
> >> MSI support would be nice to have.
> >
> > Alrighty, I added MSI support. But I only have a single vector in use
> > atm as nvec>  0 doesn't get written to the PCI config space so the code
> > trips on that later on.
> 
> For multiple vectors MSI-X is the best choice as it fixes a few design 
> issues MSI has when it comes to multiple vectors.  I think linux never 
> ever uses MSI with multiple vectors anyway.

Linux doesn't even support MSI with multiple vectors today.

        Joerg

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