linux-kernel - [PATCH 0/2] Introduce iommu

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Date:	Thu, 23 Jun 2011 17:31:21 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	<iommu@...ts.linux-foundation.org>
CC:	<linux-kernel@...r.kernel.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Ohad Ben-Cohen <ohad@...ery.com>,
	David Brown <davidb@...eaurora.org>, <kvm@...r.kernel.org>,
	Avi Kivity <avi@...hat.com>,
	Alex Williamson <alex.williamson@...hat.com>
Subject: [PATCH 0/2] Introduce iommu_commit() function

Hi,

this patch-set introduces a new function into the iommu-api:

	iommu_commit(domain);

It needs to be called whenever a some code changed a domain (either by
attaching/detaching devices or by mapping/unmapping pages in
the domain).

IOMMU drivers can implement the new commit-callback to coalesce any
cache flushing on the CPU and in the IOMMU hardware which is necessary
after changes have been made to a domain.

David, I think especially VT-d can benefit from such a callback. I will
implement support for it in the AMD IOMMU driver and post a patch-set
soon.

Any comments, thoughts?

Thanks,

	Joerg

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