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Date: Wed, 10 Aug 2016 09:50:15 +0200 (CEST)
From: Jiri Kosina <>
To: "Rafael J. Wysocki" <>
cc: "Rafael J. Wysocki" <>, 
    Thomas Garnier <>, 
    Linux PM list <>, 
    the arch/x86 maintainers <>, 
    Linux Kernel Mailing List <>, 
    Yinghai Lu <>, Thomas Gleixner <>, 
    Ingo Molnar <>, "H . Peter Anvin" <>, 
    Kees Cook <>, Pavel Machek <>, 
    Kernel Hardening <>, 
    Borislav Petkov <>
Subject: Re: [Resend][PATCH] x86/power/64: Always create temporary identity
 mapping correctly

On Wed, 10 Aug 2016, Rafael J. Wysocki wrote:

> For the lack of better ideas, below is a patch to try.
> It avoids the possible issue with the restore kernel's identity mapping overlap
> with restore_jump_address by creating special super-simple page tables just
> for the final jump to the image kernel.
> It is on top of the $subject patch.  My test box still works with this applied,
> but then it worked without it as well.
> If it doesn't help, the identity mapping created by set_up_temporary_mappings()
> is still not adequate for some reason most likely and we'll need to find out
> why.

Unfortunately, still with $subject patch + this one, triple fault and 
reboot after reading the hibernation image.

Due to being slightly out of ideas currently, I'll play a little bit more 
with the relocation offsets to see whether that makes any difference.

Jiri Kosina

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