linux-kernel - Re: [PATCH 5/5] iommu: Add DOMAIN_ATTR

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]

Date:	Tue, 5 Feb 2013 11:41:55 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	Sethi Varun-B16395 <B16395@...escale.com>
Cc:	Stuart Yoder <b08248@...il.com>,
	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Wood Scott-B07421 <B07421@...escale.com>
Subject: Re: [PATCH 5/5] iommu: Add DOMAIN_ATTR_WINDOWS domain attribute

Hi,

On Tue, Feb 05, 2013 at 09:14:40AM +0000, Sethi Varun-B16395 wrote:
> In case of PAMU, geometry would be meaningless without specifying the
> number of subwindows. If the API user specifies a geometry but fails
> to specify the number of required subwindows, we would assume a
> default (max supported) value, which may be incorrect. It's going to
> be really ugly. I think we should add the number of sub windows to the
> domain geometry. This parameter would be used in case of a window
> based iommu. So, a separate set_window API wouldn't be required.

I think this can all be implemented with the interface proposed here
together with a PAMU-specific DOMAIN_ATTR_PAMU_ENABLE attribute. Stuart
outlined in his RFC mail how this can be done. I don't consider this
ugly, it is rather a clean tradeoff between putting functionality into
the generic part of the IOMMU-API and putting it into the PAMU specific
part.

Regards,

	Joerg


--
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/