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| author | Shuah Khan <shuah.kh@samsung.com> | 2013-08-15 11:59:29 -0600 |
|---|---|---|
| committer | Joerg Roedel <joro@8bytes.org> | 2013-09-24 12:35:26 +0200 |
| commit | 3a50639ca4684476a69314811d89622d78c09448 (patch) | |
| tree | fab49d021bad6abc75269bd5a36be0159188fea0 /drivers/iommu | |
| parent | e0be7c867882320b65714a4386760382196dc7e8 (diff) | |
| download | linux-3a50639ca4684476a69314811d89622d78c09448.tar.gz linux-3a50639ca4684476a69314811d89622d78c09448.tar.bz2 linux-3a50639ca4684476a69314811d89622d78c09448.zip | |
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>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/iommu.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index ea49fe814026..d8c53c7a7ec1 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -892,6 +892,7 @@ size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size) unmapped += unmapped_page; } + trace_unmap(iova, 0, size); return unmapped; } EXPORT_SYMBOL_GPL(iommu_unmap); |