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Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when kalsr enabled

From Bhupesh Sharma <bhsharma@redhat.com>
Newsgroups linux.kernel
Subject Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when kalsr enabled
Date 2017-05-08 00:50 +0200
Message-ID <tEDa1-3FM-9@gated-at.bofh.it> (permalink)
References <tAQpc-ol-31@gated-at.bofh.it> <tDSkN-6Lq-7@gated-at.bofh.it> <tDUZj-5y-5@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Sat, May 6, 2017 at 5:06 AM, Borislav Petkov <bp@alien8.de> wrote:
> On Fri, May 05, 2017 at 09:42:14PM +0100, Matt Fleming wrote:
>> (Including the folks from SGI since this was hit on a UV system)
>
> Wasn't there a BIOS fix supplied at some point which obviated the need
> to boot with efi=old_map on SGI boxes?
>

AFAICR, the bios fixes were provided only for SGI boxes with BIOS
version greater than or equal to UV2 (so upstream with recent bios
works on UV2, UV3, and UV4 hardware platforms, both with old and new
mapping, with new mapping being the default), however the UV1
platforms still use efi=old_map

Also as mentioned above since commit
caef78b6cdeddf4ad364f95910bba6b43b8eb9bf fixed the efi=old_map support
on UV systems even with new bios, they should ideally all boot up
properly in upstream both with 'nokaslr' and without 'nokaslr' in the
bootargs when efi=old_map is used.

Regards,
Bhupesh

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Thread

[PATCH v2] x86/efi: Correct ident mapping of efi old_map when kalsr enabled Baoquan He <bhe@redhat.com> - 2017-04-27 14:10 +0200
  Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when  kalsr enabled Thomas Garnier <thgarnie@google.com> - 2017-05-01 16:30 +0200
  Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when  kalsr enabled Matt Fleming <matt@codeblueprint.co.uk> - 2017-05-05 22:50 +0200
    Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when  kalsr enabled Borislav Petkov <bp@alien8.de> - 2017-05-06 01:40 +0200
      Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when  kalsr enabled Bhupesh Sharma <bhsharma@redhat.com> - 2017-05-08 00:50 +0200
        Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when  kalsr enabled Baoquan He <bhe@redhat.com> - 2017-05-08 03:40 +0200
          Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when  kalsr enabled Borislav Petkov <bp@alien8.de> - 2017-05-08 17:30 +0200
            Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when  kalsr enabled Baoquan He <bhe@redhat.com> - 2017-05-10 04:40 +0200
      Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when         kalsr enabled Russ Anderson <rja@hpe.com> - 2017-05-08 05:30 +0200
    Re: [PATCH v2] x86/efi: Correct ident mapping of efi old_map when  kalsr enabled Baoquan He <bhe@redhat.com> - 2017-05-11 11:40 +0200

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