* Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote: > On Wed, Jun 19, 2013 at 03:04:34PM +0200, Ingo Molnar wrote: > > * Borislav Petkov <bp@xxxxxxxxx> wrote: > > > And yet there are the Macs which reportedly cannot stomach this. > > > > Do we know why? > > I got lost in a maze of pointer arithmetic. There seems to be an > assumption that nvram writes should be forbidden if in runtime mode but > with pointers still below the phys/virt split, which obviously makes no > sense but hey. > > But, as always, the only reliable thing to do here is to behave as much > like Windows as possible. [...] Amen ... > [...] Which means performing the 1:1 mapping but maintaining the high > mapping, and passing the high values via SetVirtualAddressMap. Cool - and supposedly this will work in a Mac environment as well? Would be very nice to avoid fundamentally fragile system specific quirks for something as fundamental as the EFI runtime memory mapping model ... Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
