On Thu, 24 May 2007, Olivier Galibert wrote: > > Isn't that a mac-intel instant killer? AFAIK they don't have type1, > period.
mac-intel are totally standard Intel chipsets. They have all of conf1/conf2/mmconfig afaik. I just happily booted my mac-mini with "pci=nommconf", nothing bad happened, and the kernel says PCI: Using configuration type 1 and I don't think you even _can_ disable conf1 type accesses: they are deep in the Intel chipsets. Of course, in a virtualized environment, anything can happen. Virtual machines prefer mmconf, because you can use page-level remapping to hide devices or make pseudo-devices show up by mapping in pages that have nothing to do with the true hardware. So no, I don't think Alan was totally smoking crack when he talked about "trusted" computing. Read the above paragraph a few times. (You can do it with trapping IO port accesses too, but it's going to cost you a lot, so if you want to make a fast but untrustoworthy setup, MMIO is the better option). Linus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/