From: Joerg Roedel <joerg.roedel@amd.com>
To: <iommu@lists.linux-foundation.org>
CC: <linux-kernel@vger.kernel.org>, David Woodhouse <dwmw2@infradead.org>,
        Ohad Ben-Cohen <ohad@wizery.com>, David Brown <davidb@codeaurora.org>,
        <kvm@vger.kernel.org>, Avi Kivity <avi@redhat.com>,
        Alex Williamson <alex.williamson@redhat.com>
Subject: [PATCH 0/2] Introduce iommu_commit() function
Date: Thu, 23 Jun 2011 17:31:21 +0200
Message-ID: <1308843083-10442-1-git-send-email-joerg.roedel@amd.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
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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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