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Subject[PATCH v5 23/23] iommu: use sva invalidate and device fault trace event
Date
For performance and debugging purposes, these trace events help
analyzing device faults and passdown invalidations 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.pan@linux.intel.com>
---
drivers/iommu/iommu.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 1f2f49e..0108970 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1006,6 +1006,7 @@ int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
mutex_unlock(&fparam->lock);
}
ret = fparam->handler(evt, fparam->data);
+ trace_dev_fault(dev, evt);
done_unlock:
mutex_unlock(&dev->iommu_param->lock);
return ret;
@@ -1574,6 +1575,7 @@ int iommu_sva_invalidate(struct iommu_domain *domain,
return -ENODEV;

ret = domain->ops->sva_invalidate(domain, dev, inv_info);
+ trace_sva_invalidate(dev, inv_info);

return ret;
}
@@ -1611,6 +1613,7 @@ int iommu_page_response(struct device *dev,
if (evt->pasid == msg->pasid &&
msg->page_req_group_id == evt->page_req_group_id) {
msg->private_data = evt->iommu_private;
+ trace_dev_page_response(dev, msg);
ret = domain->ops->page_response(dev, msg);
list_del(&evt->list);
kfree(evt);
--
2.7.4
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