Messages in this thread | | | Date | Tue, 4 Jun 2013 10:15:44 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH 0/4] EFI 1:1 mapping |
| |
On Mon, Jun 03, 2013 at 03:54:12PM +0100, Matt Fleming wrote: > On Mon, 03 Jun, at 03:32:52PM, Matthew Garrett wrote: > > We can only pass one set of addresses to SetVirtualAddressMap(), but it > > doesn't seem like there's any intrinsic reason we can't the runtime > > regions mapped to multiple virtual addresses. > > Indeed. That's the approach I took with my 1:1 series from last year. If > Windows is mapping things at higher addresses like you said, then > they're probably doing the same.
Right, the way I've done it now is to do the virtual mapping unconditionally, then do the 1:1 mapping and call SetVirtualAddressMap (f*cking camelcase is so nasty to type - that's why they need whole IDEs to program :-)) with that map, if "efi=1:1_map" has been passed on the cmd line.
After the call, we use *only* the 1:1 map but the virtual mapping is still there.
The initial approach to addressing the b0rked Macs would then be to never use the 1:1 map on them.
-- Regards/Gruss, Boris.
Sent from a fat crate under my desk. Formatting is fine. --
| |