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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-10 02:33:44 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-10 02:33:44 +0200
commitc23190c0bf1236e1eb5521a8b10d0102fbc1338c (patch)
treeeb23225a121fb56a58d69d34e7338bfe81ede644 /include/trace
parentMerge tag 'trace-fixes-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git... (diff)
parentARM64: add IPI tracepoints (diff)
downloadlinux-c23190c0bf1236e1eb5521a8b10d0102fbc1338c.tar.xz
linux-c23190c0bf1236e1eb5521a8b10d0102fbc1338c.zip
Merge tag 'trace-ipi-tracepoints' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull IPI tracepoints for ARM from Steven Rostedt: "Nicolas Pitre added generic tracepoints for tracing IPIs and updated the arm and arm64 architectures. It required some minor updates to the generic tracepoint system, so it had to wait for me to implement them" * tag 'trace-ipi-tracepoints' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: ARM64: add IPI tracepoints ARM: add IPI tracepoints tracepoint: add generic tracepoint definitions for IPI tracing tracing: Do not do anything special with tracepoint_string when tracing is disabled
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/ipi.h89
1 files changed, 89 insertions, 0 deletions
diff --git a/include/trace/events/ipi.h b/include/trace/events/ipi.h
new file mode 100644
index 000000000000..834a7362a610
--- /dev/null
+++ b/include/trace/events/ipi.h
@@ -0,0 +1,89 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM ipi
+
+#if !defined(_TRACE_IPI_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_IPI_H
+
+#include <linux/tracepoint.h>
+
+/**
+ * ipi_raise - called when a smp cross call is made
+ *
+ * @mask: mask of recipient CPUs for the IPI
+ * @reason: string identifying the IPI purpose
+ *
+ * It is necessary for @reason to be a static string declared with
+ * __tracepoint_string.
+ */
+TRACE_EVENT(ipi_raise,
+
+ TP_PROTO(const struct cpumask *mask, const char *reason),
+
+ TP_ARGS(mask, reason),
+
+ TP_STRUCT__entry(
+ __bitmask(target_cpus, nr_cpumask_bits)
+ __field(const char *, reason)
+ ),
+
+ TP_fast_assign(
+ __assign_bitmask(target_cpus, cpumask_bits(mask), nr_cpumask_bits);
+ __entry->reason = reason;
+ ),
+
+ TP_printk("target_mask=%s (%s)", __get_bitmask(target_cpus), __entry->reason)
+);
+
+DECLARE_EVENT_CLASS(ipi_handler,
+
+ TP_PROTO(const char *reason),
+
+ TP_ARGS(reason),
+
+ TP_STRUCT__entry(
+ __field(const char *, reason)
+ ),
+
+ TP_fast_assign(
+ __entry->reason = reason;
+ ),
+
+ TP_printk("(%s)", __entry->reason)
+);
+
+/**
+ * ipi_entry - called immediately before the IPI handler
+ *
+ * @reason: string identifying the IPI purpose
+ *
+ * It is necessary for @reason to be a static string declared with
+ * __tracepoint_string, ideally the same as used with trace_ipi_raise
+ * for that IPI.
+ */
+DEFINE_EVENT(ipi_handler, ipi_entry,
+
+ TP_PROTO(const char *reason),
+
+ TP_ARGS(reason)
+);
+
+/**
+ * ipi_exit - called immediately after the IPI handler returns
+ *
+ * @reason: string identifying the IPI purpose
+ *
+ * It is necessary for @reason to be a static string declared with
+ * __tracepoint_string, ideally the same as used with trace_ipi_raise for
+ * that IPI.
+ */
+DEFINE_EVENT(ipi_handler, ipi_exit,
+
+ TP_PROTO(const char *reason),
+
+ TP_ARGS(reason)
+);
+
+#endif /* _TRACE_IPI_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>