This patch set adds tracing feature to iommu driver 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 complete. Trace information includes iova, physical address
(map event only), and size.
iommu:map
iommu:unmap
In addition to defining the new traces, iommu driver is changed to call trace
events.
Changes since the last patch set:
- Addressed feedback: removed iommu_amd_event class.
- Generated patch with the new trace event defines.
- Generated individual patches for each trace event call in iommu driver
Shuah Khan (7):
iommu: Add event tracing feature to iommu
iommu: Change iommu driver to call add_device_to_group trace event
iommu: Change iommu driver to call remove_device_to_group trace event
iommu: Change iommu driver to call attach_device_to_domain trace
event
iommu: Change iommu driver to call detach_device_to_domain trace
event
iommu: Change iommu driver to call map trace event
iommu: Change iommu driver to call unmap trace event
drivers/iommu/Makefile | 1 +
drivers/iommu/iommu-traces.c | 24 ++++++++
drivers/iommu/iommu.c | 15 ++++-
include/trace/events/iommu.h | 129 ++++++++++++++++++++++++++++++++++++++++++
4 files changed, 168 insertions(+), 1 deletion(-)
create mode 100644 drivers/iommu/iommu-traces.c
create mode 100644 include/trace/events/iommu.h
--
1.7.10.4
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