linux-kernel - Re: [PATCH] x86, aperture: Check for GART before accessing GART registers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150402065907.GC4579@pd.tnic>
Date:	Thu, 2 Apr 2015 08:59:07 +0200
From:	Borislav Petkov <bp@...e.de>
To:	Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
Cc:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, bhelgaas@...gle.com, linux-kernel@...r.kernel.org,
	Suravee.Suthikulpanit@....com, joro@...tes.org
Subject: Re: [PATCH] x86, aperture: Check for GART before accessing GART
 registers

On Wed, Apr 01, 2015 at 09:32:08AM -0500, Aravind Gopalakrishnan wrote:
> GART registers are not present in newer processors (Fam15h, Model 10h
> and later). So, avoid accesses to GART registers in PCI config
> space by returning early in early_gart_iommu_check() and
> gart_iommu_hole_init() if GART is not available.
> 
> Refactoring the family check used in amd_nb into an inline function
> so we can use it here as well as in amd_nb.c
> 
> Tested the patch on Fam10h and Fam15h Model 00h-fh and this code
> runs fine. On Fam15h Model 60h-6fh and on Fam16h, we bail early
> as they don't have GART.
> 
> Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
> Reviewed-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
> ---
>  arch/x86/include/asm/amd_nb.h | 11 +++++++++++
>  arch/x86/kernel/amd_nb.c      |  4 +---
>  arch/x86/kernel/aperture_64.c |  4 ++--
>  3 files changed, 14 insertions(+), 5 deletions(-)

Applied, thanks.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/