Re: [tip:efi/core] x86/efi: Unmap EFI boot services code/data regions from efi_pgd

From: Ard Biesheuvel
Date: Fri Dec 21 2018 - 12:26:38 EST

On Fri, 21 Dec 2018 at 18:13, Borislav Petkov <bp@xxxxxxxxx> wrote:
> On Fri, Dec 21, 2018 at 06:02:29PM +0100, Ard Biesheuvel wrote:
> > As far as I can tell, the SGI x86 UV platforms still rely on this, so
> > we're stuck with it for the foreseeable future.
> What happened with the old apple laptops which couldn't handle high
> virtual mappings and needed 1:1? We don't care anymore?

If that is the case (I wouldn't know) then yes, there is a second
reason why we need to keep this code.