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>
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@ -1,4 +1,5 @@
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obj-$(CONFIG_IOMMU_API) += iommu.o
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obj-$(CONFIG_IOMMU_API) += iommu.o
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obj-$(CONFIG_IOMMU_API) += iommu-traces.o
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obj-$(CONFIG_OF_IOMMU) += of_iommu.o
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obj-$(CONFIG_OF_IOMMU) += of_iommu.o
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obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o
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obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o
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obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o
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obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o
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@ -0,0 +1,24 @@
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/*
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* iommu trace points
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*
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* Copyright (C) 2013 Shuah Khan <shuah.kh@samsung.com>
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*
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*/
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#include <linux/string.h>
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#include <linux/types.h>
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#define CREATE_TRACE_POINTS
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#include <trace/events/iommu.h>
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/* iommu_group_event */
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EXPORT_TRACEPOINT_SYMBOL_GPL(add_device_to_group);
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EXPORT_TRACEPOINT_SYMBOL_GPL(remove_device_from_group);
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/* iommu_device_event */
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EXPORT_TRACEPOINT_SYMBOL_GPL(attach_device_to_domain);
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EXPORT_TRACEPOINT_SYMBOL_GPL(detach_device_from_domain);
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/* iommu_map_unmap */
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EXPORT_TRACEPOINT_SYMBOL_GPL(map);
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EXPORT_TRACEPOINT_SYMBOL_GPL(unmap);
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@ -29,6 +29,7 @@
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#include <linux/idr.h>
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#include <linux/idr.h>
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#include <linux/notifier.h>
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#include <linux/notifier.h>
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#include <linux/err.h>
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#include <linux/err.h>
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#include <trace/events/iommu.h>
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static struct kset *iommu_group_kset;
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static struct kset *iommu_group_kset;
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static struct ida iommu_group_ida;
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static struct ida iommu_group_ida;
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/*
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* iommu trace points
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*
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* Copyright (C) 2013 Shuah Khan <shuah.kh@samsung.com>
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*
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM iommu
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#if !defined(_TRACE_IOMMU_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_IOMMU_H
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#include <linux/tracepoint.h>
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#include <linux/pci.h>
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struct device;
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DECLARE_EVENT_CLASS(iommu_group_event,
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TP_PROTO(int group_id, struct device *dev),
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TP_ARGS(group_id, dev),
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TP_STRUCT__entry(
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__field(int, gid)
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__string(device, dev_name(dev))
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),
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TP_fast_assign(
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__entry->gid = group_id;
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__assign_str(device, dev_name(dev));
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),
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TP_printk("IOMMU: groupID=%d device=%s",
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__entry->gid, __get_str(device)
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)
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);
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DEFINE_EVENT(iommu_group_event, add_device_to_group,
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TP_PROTO(int group_id, struct device *dev),
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TP_ARGS(group_id, dev)
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);
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DEFINE_EVENT(iommu_group_event, remove_device_from_group,
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TP_PROTO(int group_id, struct device *dev),
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TP_ARGS(group_id, dev)
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);
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DECLARE_EVENT_CLASS(iommu_device_event,
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TP_PROTO(struct device *dev),
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TP_ARGS(dev),
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TP_STRUCT__entry(
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__string(device, dev_name(dev))
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),
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TP_fast_assign(
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__assign_str(device, dev_name(dev));
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),
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TP_printk("IOMMU: device=%s", __get_str(device)
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)
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);
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DEFINE_EVENT(iommu_device_event, attach_device_to_domain,
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TP_PROTO(struct device *dev),
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TP_ARGS(dev)
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);
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DEFINE_EVENT(iommu_device_event, detach_device_from_domain,
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TP_PROTO(struct device *dev),
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TP_ARGS(dev)
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);
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DECLARE_EVENT_CLASS(iommu_map_unmap,
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TP_PROTO(unsigned long iova, phys_addr_t paddr, size_t size),
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TP_ARGS(iova, paddr, size),
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TP_STRUCT__entry(
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__field(u64, iova)
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__field(u64, paddr)
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__field(int, size)
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),
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TP_fast_assign(
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__entry->iova = iova;
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__entry->paddr = paddr;
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__entry->size = size;
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),
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TP_printk("IOMMU: iova=0x%016llx paddr=0x%016llx size=0x%x",
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__entry->iova, __entry->paddr, __entry->size
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)
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);
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DEFINE_EVENT(iommu_map_unmap, map,
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TP_PROTO(unsigned long iova, phys_addr_t paddr, size_t size),
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TP_ARGS(iova, paddr, size)
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);
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DEFINE_EVENT_PRINT(iommu_map_unmap, unmap,
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TP_PROTO(unsigned long iova, phys_addr_t paddr, size_t size),
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TP_ARGS(iova, paddr, size),
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TP_printk("IOMMU: iova=0x%016llx size=0x%x",
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__entry->iova, __entry->size
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)
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);
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#endif /* _TRACE_IOMMU_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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