linux-kernel - Re: [GIT PULL] EFI changes for v4.4

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Date:	Tue, 27 Oct 2015 18:41:39 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Matt Fleming <matt@...eblueprint.co.uk>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"H . Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
	linux-efi@...r.kernel.org, Borislav Petkov <bp@...e.de>,
	Dave Hansen <dave.hansen@...el.com>,
	Glenn P Williamson <glenn.p.williamson@...el.com>,
	Ravi Shankar <ravi.v.shankar@...el.com>,
	Ricardo Neri <ricardo.neri@...el.com>,
	Sai Praneeth Prakhya <sai.praneeth.prakhya@...el.com>
Subject: Re: [GIT PULL] EFI changes for v4.4


* Matt Fleming <matt@...eblueprint.co.uk> wrote:

> Folks, please pull the following bugfix from Sai which prevents a
> kernel panic when booting an EFI machine with CONFIG_DEBUG_VIRTUAL
> enabled.
> 
> This bug was reported last year by Dave Hansen,
> 
>   https://lkml.kernel.org/r/5462999A.7090706@intel.com
> 
> and since nobody else has reported it, and given that it's only
> triggerable with a debug config option, I figured this should be
> targeted at v4.4.
> 
> The following changes since commit 0f96a99dab366333439e110d6ad253bc7c557c09:
> 
>   efi: Add "efi_fake_mem" boot option (2015-10-12 14:20:09 +0100)
> 
> are available in the git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi.git tags/efi-next
> 
> for you to fetch changes up to 2c66e24d75d424919c42288b418d2e593fa818b1:
> 
>   x86/efi: Fix kernel panic when CONFIG_DEBUG_VIRTUAL is enabled (2015-10-25 10:22:25 +0000)
> 
> ----------------------------------------------------------------
>  * Fix a kernel panic by not passing EFI virtual mapping addresses to
>    __pa() in the x86 pageattr code. Since these virtual addreses are
>   not part of the direct mapping or kernel text mapping, passing them
>   to __pa() will trigger a BUG_ON() when CONFIG_DEBUG_VIRTUAL is
>   enabled - Sai Praneeth Prakhya
> 
> ----------------------------------------------------------------
> Sai Praneeth (1):
>       x86/efi: Fix kernel panic when CONFIG_DEBUG_VIRTUAL is enabled
> 
>  arch/x86/mm/pageattr.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)

Pulled, thanks Matt!

	Ingo
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