iommu: Change iommu driver to call unmap trace event

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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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Shuah Khan 2013-08-15 11:59:29 -06:00 • committed by Joerg Roedel

parent e0be7c8678

commit 3a50639ca4

1 changed files with 1 additions and 0 deletions

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drivers/iommu/iommu.c

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