Commit 04fa2f7f authored by Shuah Khan's avatar Shuah Khan Committed by Joerg Roedel
Browse files

iommu: Add iommu_error class event to iommu trace 



iommu_error class event can be enabled to trigger when an iommu
error occurs. This trace event is intended to be called to report the
error information. Trace information includes driver name, device name,
iova, and flags.

iommu_error:io_page_fault

Signed-off-by: default avatarShuah Khan <shuah.kh@samsung.com>
Signed-off-by: default avatarJoerg Roedel <joro@8bytes.org>
parent 3a50639c

drivers/iommu/iommu-traces.c

+3 −0
Original line number Diff line number Diff line
@@ -22,3 +22,6 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(detach_device_from_domain); 
/* iommu_map_unmap */

EXPORT_TRACEPOINT_SYMBOL_GPL(map);

EXPORT_TRACEPOINT_SYMBOL_GPL(unmap);



/* iommu_error */

EXPORT_TRACEPOINT_SYMBOL_GPL(io_page_fault);

include/trace/events/iommu.h

+33 −0
Original line number Diff line number Diff line
@@ -123,6 +123,39 @@ DEFINE_EVENT_PRINT(iommu_map_unmap, unmap, 
			__entry->iova, __entry->size

	)

);



DECLARE_EVENT_CLASS(iommu_error,



	TP_PROTO(struct device *dev, unsigned long iova, int flags),



	TP_ARGS(dev, iova, flags),



	TP_STRUCT__entry(

		__string(device, dev_name(dev))

		__string(driver, dev_driver_string(dev))

		__field(u64, iova)

		__field(int, flags)

	),



	TP_fast_assign(

		__assign_str(device, dev_name(dev));

		__assign_str(driver, dev_driver_string(dev));

		__entry->iova = iova;

		__entry->flags = flags;

	),



	TP_printk("IOMMU:%s %s iova=0x%016llx flags=0x%04x",

			__get_str(driver), __get_str(device),

			__entry->iova, __entry->flags

	)

);



DEFINE_EVENT(iommu_error, io_page_fault,



	TP_PROTO(struct device *dev, unsigned long iova, int flags),



	TP_ARGS(dev, iova, flags)

);

#endif /* _TRACE_IOMMU_H */



/* This part must be outside protection */

CRA Git | Maintained and supported by SUSTech CRA and CCSE