From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark Salter <msalter-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH] efi/arm64: efistub: don't abort if base of DRAM is
 occupied
Date: Tue, 15 Jul 2014 09:11:00 -0400
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To: Leif Lindholm <leif.lindholm-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Ard Biesheuvel <ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>, matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, roy.franz-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, catalin.marinas-5wv7dgnIgG8@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org
List-Id: linux-efi@vger.kernel.org

On Tue, 2014-07-15 at 11:02 +0100, Leif Lindholm wrote:
> > @@ -273,6 +282,10 @@ static void __init free_boot_services(void)
> >                       continue;
> >               }
> >  
> > +             /* Don't free anything below kernel */
> > +             if (md->phys_addr < PHYS_OFFSET)
> > +                     continue;
> > +
> 
> Is the spin table area really allocated as BOOT_SERVICES_*?
> 

No. It is EFI_RESERVED_TYPE. But if UEFI is allowed below the kernel,
then there could be BS code/data memory which we'd want to ignore.