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authorShuah Khan <shuah.kh@samsung.com>2013-08-15 21:59:24 +0400
committerJoerg Roedel <joro@8bytes.org>2013-09-24 14:35:24 +0400
commitd1cf7e822746b5e755f5a893ffeced1f6311c0cf (patch)
treeb85e39bcf124389a6f29d3c76e4002798d5a3233 /drivers/iommu/iommu.c
parent7f6db1717235bd45d265766dad53c10d30899d41 (diff)
downloadlinux-d1cf7e822746b5e755f5a893ffeced1f6311c0cf.tar.xz
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>
Diffstat (limited to 'drivers/iommu/iommu.c')
-rw-r--r--drivers/iommu/iommu.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 58f6a16b2e1a..349c92dfce05 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);