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Message-Id: <53a8cce889b9620d26521d6a1170b98586b81577.1376587770.git.shuah.kh@samsung.com>
Date: Thu, 15 Aug 2013 11:59:25 -0600
From: Shuah Khan <shuah.kh@...sung.com>
To: joro@...tes.org, alex.williamson@...hat.com,
Varun.Sethi@...escale.com, aik@...abs.ru, joe@...ches.com,
rostedt@...dmis.org, fweisbec@...il.com, mingo@...hat.com,
tony@...mide.com, ohad@...ery.com, andreas.herrmann@...xeda.com,
will.deacon@....com
Cc: Shuah Khan <shuah.kh@...sung.com>, linux-kernel@...r.kernel.org,
iommu@...ts.linux-foundation.org, shuahkhan@...il.com
Subject: [PATCH 3/7] iommu: Change iommu driver to call remove_device_to_group trace event
Change iommu driver to call remove_device_to_group trace event. This
iommu_group class event can be enabled to trigger when devices get
removed from an iommu group. Trace information includes iommu group id and
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] .... 1.854101: remove_device_from_group: IOMMU: groupID=0 device=0000:00:02.0
Signed-off-by: Shuah Khan <shuah.kh@...sung.com>
---
drivers/iommu/iommu.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 349c92d..278055b 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -402,6 +402,8 @@ void iommu_group_remove_device(struct device *dev)
sysfs_remove_link(group->devices_kobj, device->name);
sysfs_remove_link(&dev->kobj, "iommu_group");
+ trace_remove_device_from_group(group->id, dev);
+
kfree(device->name);
kfree(device);
dev->iommu_group = NULL;
--
1.7.10.4
--
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