Change iommu driver to call detach_device_to_domain trace event. This iommu_device class event can be enabled to trigger when devices are detached from 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: detach_device_from_domain: IOMMU: device=0000:00:02.0 Signed-off-by: Shuah Khan <shuah...@samsung.com> --- drivers/iommu/iommu.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 74c371c..b630754 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -702,6 +702,7 @@ void iommu_detach_device(struct iommu_domain *domain, struct device *dev) return; domain->ops->detach_dev(domain, dev); + trace_detach_device_from_domain(dev); } EXPORT_SYMBOL_GPL(iommu_detach_device); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/