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

[Gerd Hoffmann]

> > > +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.

cheers,
  Gerd