Add tracing feature to iommu driver to report various iommu events. Classes iommu_group, iommu_device, iommu_map_unmap, and iommu_amd_event 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:unmap iommu:map iommu_amd_event class can be enabled to trigger when AMD IOMMU driver finds events when it polls the IOMMU Event Log. Trace information includes the event string derived from the event type in human friendly form, event type, id of the domain the device is placed in, device (bus number, slot number, and function number), address associated with the event, and flags. iommu:amd_event Signed-off-by: Shuah Khan <shuah...@samsung.com> --- drivers/iommu/Makefile | 1 + drivers/iommu/iommu-traces.c | 27 +++++++++++++++++++++++++++ 2 files changed, 28 insertions(+) create mode 100644 drivers/iommu/iommu-traces.c diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile index bbe7041..9015c45 100644 --- a/drivers/iommu/Makefile +++ b/drivers/iommu/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_IOMMU_API) += iommu.o +obj-$(CONFIG_IOMMU_API) += iommu-traces.o obj-$(CONFIG_OF_IOMMU) += of_iommu.o obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o diff --git a/drivers/iommu/iommu-traces.c b/drivers/iommu/iommu-traces.c new file mode 100644 index 0000000..5b92e4c --- /dev/null +++ b/drivers/iommu/iommu-traces.c @@ -0,0 +1,27 @@ +/* + * iommu trace points + * + * Copyright (C) 2013 Shuah Khan <shuah...@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); + +/* iommu_amd_event */ +EXPORT_TRACEPOINT_SYMBOL_GPL(amd_event); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
