Il 12/06/2013 09:49, Jan Beulich ha scritto: >> #3 should be possible or even the default (would need to check), but #4 >> is probably a bit harder to do. Perhaps you can use a magic I/O port >> for the xen platform PV driver, but if you can simply use two PCI >> windows it would be much simpler because that's the same that TCG and >> KVM already do. The code is all there for you to lift in SeaBIOS. > > What is the connection here to the platform PV driver?
It's just a hook you already have for Xen-specific stuff in QEMU. >> Only Windows XP and older had problems with that because they didn't >> like something in the ASL; but the 64-bit window is placed at the end of >> RAM, so in principle any PAE-enabled OS can use it. > > At the end of _RAM_??? Why the question marks? :) If you have 4GB of RAM it will end at 0x140000000 (or something like that) and that's where the 64-bit window starts. Of course if you have no RAM above the PCI hole, the 64-bit window will start at 0x100000000. Paolo
