[PATCH v5 04/19] iommu: Use device fault trace event

[Jacob Pan]

From: Jean-Philippe Brucker <jean-philippe.bruc...@arm.com>

For performance and debugging purposes, these trace events help
analyzing device faults that interact with IOMMU subsystem.
E.g.
IOMMU:0000:00:0a.0 type=2 reason=0 addr=0x00000000007ff000 pasid=1
group=1 last=0 prot=1

Signed-off-by: Jacob Pan <jacob.jun....@linux.intel.com>
[JPB: removed invalidate event, that will be added later]
Signed-off-by: Jean-Philippe Brucker <jean-philippe.bruc...@arm.com>

Signed-off-by: Jacob Pan <jacob.jun....@linux.intel.com>
---
 drivers/iommu/iommu.c        | 2 ++
 include/trace/events/iommu.h | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 8f2c7d5..feada31 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1098,6 +1098,7 @@ int iommu_report_device_fault(struct device *dev, struct 
iommu_fault_event *evt)
                mutex_unlock(&fparam->lock);
                kfree(evt_pending);
        }
+       trace_dev_fault(dev, &evt->fault);
 done_unlock:
        mutex_unlock(&param->lock);
        return ret;
@@ -1146,6 +1147,7 @@ int iommu_page_response(struct device *dev,
                msg->flags = pasid_valid ? IOMMU_PAGE_RESP_PASID_VALID : 0;
 
                ret = domain->ops->page_response(dev, evt, msg);
+               trace_dev_page_response(dev, msg);
                list_del(&evt->list);
                kfree(evt);
                break;
diff --git a/include/trace/events/iommu.h b/include/trace/events/iommu.h
index 767b92c..7a7801b 100644
--- a/include/trace/events/iommu.h
+++ b/include/trace/events/iommu.h
@@ -219,7 +219,7 @@ TRACE_EVENT(dev_fault,
 
 TRACE_EVENT(dev_page_response,
 
-       TP_PROTO(struct device *dev,  struct iommu_fault_page_response *msg),
+       TP_PROTO(struct device *dev,  struct iommu_page_response *msg),
 
        TP_ARGS(dev, msg),
 
-- 
2.7.4