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Date:   Fri, 21 Dec 2018 20:29:28 +0100
From:   Borislav Petkov <bp@alien8.de>
To:     Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        matt@codeblueprint.co.uk
Cc:     "Prakhya, Sai Praneeth" <sai.praneeth.prakhya@intel.com>,
        Ingo Molnar <mingo@kernel.org>,
        "tglx@linutronix.de" <tglx@linutronix.de>,
        "x86@kernel.org" <x86@kernel.org>,
        "marc.zyngier@arm.com" <marc.zyngier@arm.com>,
        "eric.snowberg@oracle.com" <eric.snowberg@oracle.com>,
        "hdegoede@redhat.com" <hdegoede@redhat.com>,
        "Hansen, Dave" <dave.hansen@intel.com>,
        "peterz@infradead.org" <peterz@infradead.org>,
        "hpa@zytor.com" <hpa@zytor.com>,
        "arend.vanspriel@broadcom.com" <arend.vanspriel@broadcom.com>,
        "julien.thierry@arm.com" <julien.thierry@arm.com>,
        "bhsharma@redhat.com" <bhsharma@redhat.com>,
        "jonathanh@nvidia.com" <jonathanh@nvidia.com>,
        "joe@perches.com" <joe@perches.com>,
        "torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
        "natechancellor@gmail.com" <natechancellor@gmail.com>,
        "luto@kernel.org" <luto@kernel.org>,
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        "zhuyifei1999@gmail.com" <zhuyifei1999@gmail.com>,
        "linux-tip-commits@vger.kernel.org" 
        <linux-tip-commits@vger.kernel.org>
Subject: Re: [tip:efi/core] x86/efi: Unmap EFI boot services code/data
 regions from efi_pgd
Message-ID: <20181221192928.GM1325@zn.tnic>
References: <20181129171230.18699-6-ard.biesheuvel@linaro.org>
 <tip-08cfb38f3ef49cfd1bba11a00401451606477d80@git.kernel.org>
 <FFF73D592F13FD46B8700F0A279B802F48604575@ORSMSX114.amr.corp.intel.com>
 <CAKv+Gu_vTHFxpKRu_CxKP-GdNdgdFKr7fi87VkNur0sqGQNVDw@mail.gmail.com>
 <FFF73D592F13FD46B8700F0A279B802F486045CA@ORSMSX114.amr.corp.intel.com>
 <CAKv+Gu9iJinkP-buhmzRyB91_HcJ-tDwT3YHeHGFo4Bsiv7O_Q@mail.gmail.com>
 <FFF73D592F13FD46B8700F0A279B802F486046A9@ORSMSX114.amr.corp.intel.com>
 <CAKv+Gu99VdPero0yrXiaByURyp1idYE948Qi4j1eqY0ENCrF5A@mail.gmail.com>
 <20181221171308.GJ1325@zn.tnic>
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On Fri, Dec 21, 2018 at 06:26:23PM +0100, Ard Biesheuvel wrote:
> On Fri, 21 Dec 2018 at 18:13, Borislav Petkov <bp@alien8.de> 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.

Fleming knows details and he's on CC, lemme "pull" him up into To: :-)

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.