Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime

From	Borislav Petkov <bp@suse.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime
Date	2015-09-17 10:10 +0200
Message-ID	<q9Cqu-5Ub-11@gated-at.bofh.it> (permalink)
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On Wed, Sep 16, 2015 at 03:38:45PM +0200, Ard Biesheuvel wrote:
> That is a can of worms I'd rather keep closed, if you don't mind ...

Same here.

> But in general, since we are already violating the PE/COFF spec by
> relocating each runtime image once, then invoke its entry point, then
> fire an event which it should catch to manually update its pointers,
> and then relocate it again into the OS VA space.

Yeah, I vaguely remember at the time hpa proposing an EFI-specific
page fault handler or so. I guess we should consider such or similar
technique as it should be most flexible to deal with such screwups. And
with whatever funky fw stuff comes our way in the future...

Thanks.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
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Thread

Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime Matt Fleming <matt@codeblueprint.co.uk> - 2015-09-08 22:50 +0200
  Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime joeyli <jlee@suse.com> - 2015-09-09 02:40 +0200
    Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime Matt Fleming <matt@codeblueprint.co.uk> - 2015-09-09 13:30 +0200
      Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime joeyli <jlee@suse.com> - 2015-09-10 05:40 +0200
      Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime Borislav Petkov <bp@suse.de> - 2015-09-16 12:10 +0200
        Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2015-09-16 13:30 +0200
          Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime Borislav Petkov <bp@suse.de> - 2015-09-16 15:30 +0200
            Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2015-09-16 15:40 +0200
              Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime Borislav Petkov <bp@suse.de> - 2015-09-17 10:10 +0200
          Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime James Bottomley <jbottomley@odin.com> - 2015-09-16 15:40 +0200
            Re: [PATCH] x86/efi: Map EFI memmap entries in-order at runtime Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2015-09-16 16:10 +0200

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