Re: [PATCH -v2 0/4] EFI 1:1 mapping

From: Borislav Petkov
Date: Thu Jun 20 2013 - 05:33:51 EST

On Thu, Jun 20, 2013 at 11:22:37AM +0200, Ingo Molnar wrote:
> > > 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 ...
> >
> > Apple is the only case where I'd expect there to be an issue, since they
> > only started supporting booting Windows via UEFI on very recent systems.
> > However, unless they're actually sniffing the page tables on UEFI entry,
> > I can't see any way that this could break things???
> Agreed - I was susprised to see that the runtime was able to _break_ in
> any way due to 1:1: my assumption was that it can only get better.
> But I did not realize that the 1:1 boot flag also changed what was passed
> down, which probably explains the breakages.

Right, in the next version, the boot flag will influence only what's
being passed down.

> I'd even argue to not do this whole boot flag thing at all - just
> standardize on the Windows compatibility model as closely as possible.

This will break the Macs so maybe we can do


so the Macs can still boot but use the 1:1 map by default.


Sent from a fat crate under my desk. Formatting is fine.
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