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author | Shuah Khan <shuah.kh@samsung.com> | 2013-08-15 21:59:23 +0400 |
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committer | Joerg Roedel <joro@8bytes.org> | 2013-09-24 14:35:24 +0400 |
commit | 7f6db1717235bd45d265766dad53c10d30899d41 (patch) | |
tree | bee0c7f789d27258e61f795631243bf971c0132e /drivers/iommu/iommu-traces.c | |
parent | 4a10c2ac2f368583138b774ca41fac4207911983 (diff) | |
download | linux-7f6db1717235bd45d265766dad53c10d30899d41.tar.xz |
iommu: Add event tracing feature to iommu
Add tracing feature to iommu to report various iommu events. Classes
iommu_group, iommu_device, and iommu_map_unmap are defined.
iommu_group class events can be enabled to trigger when devices get added
to and removed from an iommu group. Trace information includes iommu group
id and device name.
iommu:add_device_to_group
iommu:remove_device_from_group
iommu_device class events can be enabled to trigger when devices are attached
to and detached from a domain. Trace information includes device name.
iommu:attach_device_to_domain
iommu:detach_device_from_domain
iommu_map_unmap class events can be enabled to trigger when iommu map and
unmap iommu ops. Trace information includes iova, physical address (map event
only), and size.
iommu:map
iommu:unmap
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'drivers/iommu/iommu-traces.c')
-rw-r--r-- | drivers/iommu/iommu-traces.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/iommu/iommu-traces.c b/drivers/iommu/iommu-traces.c new file mode 100644 index 000000000000..a2af60f31810 --- /dev/null +++ b/drivers/iommu/iommu-traces.c @@ -0,0 +1,24 @@ +/* + * iommu trace points + * + * Copyright (C) 2013 Shuah Khan <shuah.kh@samsung.com> + * + */ + +#include <linux/string.h> +#include <linux/types.h> + +#define CREATE_TRACE_POINTS +#include <trace/events/iommu.h> + +/* iommu_group_event */ +EXPORT_TRACEPOINT_SYMBOL_GPL(add_device_to_group); +EXPORT_TRACEPOINT_SYMBOL_GPL(remove_device_from_group); + +/* iommu_device_event */ +EXPORT_TRACEPOINT_SYMBOL_GPL(attach_device_to_domain); +EXPORT_TRACEPOINT_SYMBOL_GPL(detach_device_from_domain); + +/* iommu_map_unmap */ +EXPORT_TRACEPOINT_SYMBOL_GPL(map); +EXPORT_TRACEPOINT_SYMBOL_GPL(unmap); |