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authorShuah Khan <shuah.kh@samsung.com>2013-08-15 21:59:26 +0400
committerJoerg Roedel <joro@8bytes.org>2013-09-24 14:35:25 +0400
commitb54db778858bc83f9231e5b358cb978f559f7016 (patch)
tree8eb88b179a4dbafc6821b8f7c3660e2a26a03c06 /drivers/iommu
parent2e757086bdfdc9450dc2e4a5d2ec5431520a02c8 (diff)
downloadlinux-b54db778858bc83f9231e5b358cb978f559f7016.tar.xz
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: 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.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 278055bd0715..74c371c53ee4 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -685,10 +685,14 @@ EXPORT_SYMBOL_GPL(iommu_domain_free);
int iommu_attach_device(struct iommu_domain *domain, struct device *dev)
{
+ int ret;
if (unlikely(domain->ops->attach_dev == NULL))
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);