From: Shuah Khan <shuah.kh@samsung.com>
Date: Thu, 15 Aug 2013 17:59:29 +0000 (-0600)
Subject: iommu: Change iommu driver to call unmap trace event
X-Git-Tag: v3.13-rc1~79^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3a50639ca4684476a69314811d89622d78c09448;p=pandora-kernel.git

iommu: Change iommu driver to call unmap trace event

Change iommu driver to call unmap trace event. This iommu_map_unmap class
event can be enabled to trigger when iommu unmap iommu ops is called. Trace
information includes iova, physical address (map event only), and size.

Testing:
Added trace calls to iommu_prepare_identity_map() for testing some of the
conditions that are hard to trigger. Here is the trace from the testing:

       swapper/0-1     [003] ....     1.854102: unmap: IOMMU: iova=0x00000000cb800000 size=0x400

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
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