Re: Multiple MSI, take 3

[Benjamin Herrenschmidt]

On Fri, 2008-07-11 at 15:59 -0700, Eric W. Biederman wrote:
> Suresh Siddha <suresh.b.siddha@xxxxxxxxx> writes:
> 
> > With interrupt-remapping, we can program the individual interrupt
> > remapping table entries to point to different cpu's etc. All we have
> > to take care is, do the IRTE allocation in a consecutive block and
> > program the starting index to the MSI registers.
> >
> > Just curious Eric, why do you think that won't work?
> 
> Working mask/unmask.  With MSI-X as specced if I mask an irq and then unmask
> it, an msi message will fire if something happened while the irq was masked
> and not taken care of before the irq was unmasked.  That is the correct
> behavior for an irq and a mmu won't let me get that.

And ? It's just a message, we can ignore it if masked, ie, do
software-masking. Not a big deal... no ?

Ben.


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