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: <20150402100135.GA5210@gmail.com>
Date:	Thu, 2 Apr 2015 12:01:35 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
Cc:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, bp@...e.de, 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


* Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com> 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.

In what fashion did this problem manifest itself on real systems?

Thanks,

	Ingo
--
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/