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Commit b54db778 authored by Shuah Khan's avatar Shuah Khan Committed by Joerg Roedel
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iommu: Change iommu driver to call attach_device_to_domain trace event 



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: default avatarShuah Khan <shuah.kh@samsung.com>
Signed-off-by: default avatarJoerg Roedel <joro@8bytes.org>
parent 2e757086

drivers/iommu/iommu.c

+5 −1
Original line number Original line Diff line number Diff line
@@ -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);