rtla/osnoise: Add IPI tracking cmdline option

Later commits will add IPI tracking to osnoise top. To avoid breaking
existing scripts, this new feature will be gated behind a new --ipi option.

Suggested-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Valentin Schneider <vschneid@redhat.com>
Link: https://lore.kernel.org/r/20260902123942.695822-2-vschneid@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>

Documentation/tools/rtla/rtla-osnoise-top.rst

@@ -28,6 +28,10 @@ OPTIONS
 =======
 .. include:: common_osnoise_options.txt
 
+**--ipi**
+
+	Track sources of IPIs.
+
 .. include:: common_top_options.txt
 
 .. include:: common_options.txt

tools/tracing/rtla/src/cli.c

@@ -78,6 +78,7 @@ struct common_params *osnoise_top_parse_args(int argc, char **argv)
 		RTLA_OPT_STOP_TOTAL('S', "stop-total", "total sample"),
 		OSNOISE_OPT_THRESHOLD,
 		RTLA_OPT_TRACE_OUTPUT("osnoise", opt_osnoise_trace_output_cb),
+		OSNOISE_OPT_IPI,
 
 	OPT_GROUP("Event Configuration:"),
 		RTLA_OPT_EVENT,

tools/tracing/rtla/src/cli_p.h

@@ -497,6 +497,9 @@ static int opt_filter_cb(const struct option *opt, const char *arg, int unset)
 #define OSNOISE_OPT_THRESHOLD RTLA_OPT_LLONG('T', "threshold", &params->threshold, "us", \
 	"the minimum delta to be considered a noise")
 
+#define OSNOISE_OPT_IPI OPT_BOOLEAN(0, "ipi", &params->common.ipi, \
+	"track sources of IPIs")
+
 /*
  * Callback functions for command line options for osnoise tools
  */

tools/tracing/rtla/src/common.h

@@ -108,6 +108,7 @@ struct common_params {
 	bool			kernel_workload;
 	bool			user_data;
 	bool			aa_only;
+	bool			ipi;
 
 	struct actions		threshold_actions;
 	struct actions		end_actions;