Should message signaled interrupts (MSI) work with Intel GMA 950?

[Roland Dreier]

Hi Jesse (or other Intel guys),

If you get a chance, can you check for sure whether MSI is actually
supposed to work for 945GM?  Even if the practical value is low, I'd still like
to get my patch working if the hardware supports it.

And if there are other registers to poke to enable MSI, info about that
would be useful too.

Thanks,
  Roland