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| author | Shuah Khan <shuah.kh@samsung.com> | 2013-08-15 21:59:28 +0400 |
|---|---|---|
| committer | Joerg Roedel <joro@8bytes.org> | 2013-09-24 14:35:26 +0400 |
| commit | e0be7c867882320b65714a4386760382196dc7e8 (patch) | |
| tree | 979bd58ff375bf1dbf05a380118fc33dafa129f8 | |
| parent | 699806302d8ac7dfb7d46e20da0ecd4317418d1d (diff) | |
| download | linux-e0be7c867882320b65714a4386760382196dc7e8.tar.xz | |
iommu: Change iommu driver to call map trace event
Change iommu driver to call map trace event. This iommu_map_unmap class event
can be enabled to trigger when iommu map 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: map: IOMMU: iova=0x00000000cb800000 paddr=0x00000000cf9fffff size=0x400
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
| -rw-r--r-- | drivers/iommu/iommu.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index b6307545124c..ea49fe814026 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -842,6 +842,8 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova, /* unroll mapping in case something went wrong */ if (ret) iommu_unmap(domain, orig_iova, orig_size - size); + else + trace_map(iova, paddr, size); return ret; } |