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iommu: Change iommu driver to call attach_device_to_domain trace event

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Change iommu driver to call attach_device_to_domain trace event. This
iommu_device class event can be enabled to trigger when devices are attached
to a domain. Trace information includes device name.

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: attach_device_to_domain: IOMMU: device=0000:00:02.0

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
This commit is contained in:
Shuah Khan 2013-08-15 11:59:26 -06:00 committed by Joerg Roedel
parent 2e757086bd
commit b54db77885
1 changed files with 5 additions and 1 deletions
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6
drivers/iommu/iommu.c
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@ -685,10 +685,14 @@ EXPORT_SYMBOL_GPL(iommu_domain_free);
int iommu_attach_device(struct iommu_domain *domain, struct device *dev) int iommu_attach_device(struct iommu_domain *domain, struct device *dev)
{ {
int ret;
if (unlikely(domain->ops->attach_dev == NULL)) if (unlikely(domain->ops->attach_dev == NULL))
return -ENODEV; return -ENODEV;
return domain->ops->attach_dev(domain, dev); ret = domain->ops->attach_dev(domain, dev);
if (!ret)
trace_attach_device_to_domain(dev);
return ret;
} }
EXPORT_SYMBOL_GPL(iommu_attach_device); EXPORT_SYMBOL_GPL(iommu_attach_device);