Commit d1cf7e82 authored Aug 15, 2013 by Shuah Khan Committed by Joerg Roedel Sep 24, 2013

iommu: Change iommu driver to call add_device_to_group trace event

Change iommu driver to call add_device_to_group trace event. This iommu_group
class event can be enabled to trigger when devices get added to an iommu group.
Trace information includes iommu group id and device name.

Testing:
The following is trace is generated when intel-iommu driver adds devices to
to iommu groups during boot-time during its initialization:

swapper/0-1 [003] .... 1.854793: add_device_to_group: IOMMU: groupID=0 device=0000:00:00.0
swapper/0-1 [003] .... 1.854797: add_device_to_group: IOMMU: groupID=1 device=0000:00:02.0

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>

parent 7f6db171

drivers/iommu/iommu.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -364,6 +364,8 @@ rename:
		/* Notify any listeners about change to group. */
		blocking_notifier_call_chain(&group->notifier,
		IOMMU_GROUP_NOTIFY_ADD_DEVICE, dev);

		trace_add_device_to_group(group->id, dev);
		return 0;
		}
		EXPORT_SYMBOL_GPL(iommu_group_add_device);

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