[PATCH 5/7] tracing: add config option for print arguments in ftrace

[Sven Schnelle <svens@linux.ibm.com>]

Add a config option to disable/enable function argument
printing support during runtime.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
---
 kernel/trace/Kconfig | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 721c3b221048..8b9b6cdf39ac 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -242,6 +242,18 @@ config FUNCTION_GRAPH_RETVAL
 	  enable it via the trace option funcgraph-retval.
 	  See Documentation/trace/ftrace.rst
 
+config FUNCTION_TRACE_ARGS
+	bool "Kernel Function Tracer Arguments"
+	depends on HAVE_FUNCTION_ARG_ACCESS_API
+	depends on DEBUG_INFO_BTF && BPF_SYSCALL
+	default n
+	help
+	  Support recording and printing of function arguments when using
+	  the function tracer or function graph tracer. This feature is off
+	  by default, and can be enabled via the trace option func-args (for
+	  the function tracer) and funcgraph-args (for the function graph
+	  tracer).
+
 config DYNAMIC_FTRACE
 	bool "enable/disable function tracing dynamically"
 	depends on FUNCTION_TRACER
-- 
2.43.0