linux-kernel - Re: PCI-DMA: Disabling IOMMU

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] [day] [month] [year] [list]

Message-Id: <200610191504.37384.ak@suse.de>
Date:	Thu, 19 Oct 2006 15:04:37 +0200
From:	Andi Kleen <ak@...e.de>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Muli Ben-Yehuda <muli@...ibm.com>,
	Sebastian Biallas <sb@...llas.net>,
	linux-kernel@...r.kernel.org
Subject: Re: PCI-DMA: Disabling IOMMU

> Actually if you flip it around and print
> "PCI-DMA: Enabling IOMMU"
> 
> and keep quiet if you disable it then users should be happy because its
> turned something on and that is clearly always good 8)

There already is a Using GART IOMMU message afterwards. The reason the
disabling message is there that one can distingush the case of IOMMU
working, but deciding that it's not needed and IOMMU not compiled
in (which unfortunately a few users do even when they need it) 

Ok admittedly there is another warning when iommu is disabled, but
would be needed anyways so maybe it's obsolete. But I think it's better
to keep it for now.

-Andi
-
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/