From d1cf7e822746b5e755f5a893ffeced1f6311c0cf Mon Sep 17 00:00:00 2001 From: Shuah Khan Date: Thu, 15 Aug 2013 11:59:24 -0600 Subject: 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 Signed-off-by: Joerg Roedel --- drivers/iommu/iommu.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/iommu/iommu.c') diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 58f6a16..349c92d 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -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); -- cgit v1.1