On Wed, 2013-06-05 at 17:53 -0500, Anthony Liguori wrote: > If strictly speaking it's just that MMIO is a bit faster, I'm not sure > that complexity is worth it without seeing performance numbers first. You mean PIO. I agree with all your points here. The only thing I saw as an option would be to add a PIO BAR that is an exact mirror of the MMIO BAR if and only if: - PIO is indeed significantly faster on platforms we care about and/or - There is significant simplification in things like BIOSes in using PIO over MMIO I personally don't care and would chose to use MMIO always including in firmware on ppc. Cheers, Ben. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
