Messages in this thread Patch in this message | | | From | Shuah Khan <> | Subject | [PATCH 4/7] iommu: Change iommu driver to call attach_device_to_domain trace event | Date | Thu, 15 Aug 2013 11:59:26 -0600 |
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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> --- drivers/iommu/iommu.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 278055b..74c371c 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); -- 1.7.10.4
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