On 03/25/2012 03:05 PM, Michael S. Tsirkin wrote: > We face a dilemma: IO mapped addresses are legacy, > so, for example, PCI express bridges waste 4K > of this space for each link, in effect limiting us > to 16 devices using this space. That is *only* if they are physical devices on PCIe links. For virtual devices you have no such limitation. What is the problem again? -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- 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