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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: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
hifive-unleashed-5.1
Shuah Khan 2013-09-24 15:21:19 -06:00 committed by Joerg Roedel
parent 3a50639ca4
commit 04fa2f7f83
2 changed files with 36 additions and 0 deletions
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3
drivers/iommu/iommu-traces.c
View File

@ -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);

33
include/trace/events/iommu.h
View File

@ -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 */