rv: Simplify manual steps in monitor creation

While creating a new monitor in RV, besides generating code from dot2k,
there are a few manual steps which can be tedious and error prone, like
adding the tracepoints, makefile lines and kconfig.

This patch restructures the existing monitors to keep some files in the
monitor's folder itself, which can be automatically generated by future
versions of dot2k.

Monitors have now their own Kconfig and tracepoint snippets. For
simplicity, the main tracepoint definition, is moved to the RV
directory, it defines only the tracepoint classes and includes the
monitor-specific tracepoints, which reside in the monitor directory.

Tracepoints and Kconfig no longer need to be copied and adapted from
existing ones but only need to be included in the main files.
The Makefile remains untouched since there's little advantage in having
a separated Makefile for each monitor with a single line and including
it in the main RV Makefile.

Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
Link: https://lore.kernel.org/20241227144752.362911-6-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

kernel/trace/rv/Kconfig

@@ -25,30 +25,9 @@ menuconfig RV
 	  For further information, see:
 	    Documentation/trace/rv/runtime-verification.rst
 
-config RV_MON_WIP
+source "kernel/trace/rv/monitors/wip/Kconfig"
-	depends on RV
-	depends on PREEMPT_TRACER
-	select DA_MON_EVENTS_IMPLICIT
-	bool "wip monitor"
-	help
-	  Enable wip (wakeup in preemptive) sample monitor that illustrates
-	  the usage of per-cpu monitors, and one limitation of the
-	  preempt_disable/enable events.
 
-	  For further information, see:
+source "kernel/trace/rv/monitors/wwnr/Kconfig"
-	    Documentation/trace/rv/monitor_wip.rst
-
-config RV_MON_WWNR
-	depends on RV
-	select DA_MON_EVENTS_ID
-	bool "wwnr monitor"
-	help
-	  Enable wwnr (wakeup while not running) sample monitor, this is a
-	  sample monitor that illustrates the usage of per-task monitor.
-	  The model is borken on purpose: it serves to test reactors.
-
-	  For further information, see:
-	    Documentation/trace/rv/monitor_wwnr.rst
 
 config RV_REACTORS
 	bool "Runtime verification reactors"

kernel/trace/rv/Makefile

@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
+ccflags-y += -I $(src)		# needed for trace events
+
 obj-$(CONFIG_RV) += rv.o
 obj-$(CONFIG_RV_MON_WIP) += monitors/wip/wip.o
 obj-$(CONFIG_RV_MON_WWNR) += monitors/wwnr/wwnr.o

kernel/trace/rv/monitors/wip/Kconfig

@@ -0,0 +1,12 @@
+config RV_MON_WIP
+	depends on RV
+	depends on PREEMPT_TRACER
+	select DA_MON_EVENTS_IMPLICIT
+	bool "wip monitor"
+	help
+	  Enable wip (wakeup in preemptive) sample monitor that illustrates
+	  the usage of per-cpu monitors, and one limitation of the
+	  preempt_disable/enable events.
+
+	  For further information, see:
+	    Documentation/trace/rv/monitor_wip.rst

kernel/trace/rv/monitors/wip/wip.c

@@ -10,7 +10,7 @@
 
 #define MODULE_NAME "wip"
 
-#include <trace/events/rv.h>
+#include <rv_trace.h>
 #include <trace/events/sched.h>
 #include <trace/events/preemptirq.h>
 

kernel/trace/rv/monitors/wip/wip_trace.h

@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/*
+ * Snippet to be included in rv_trace.h
+ */
+
+#ifdef CONFIG_RV_MON_WIP
+DEFINE_EVENT(event_da_monitor, event_wip,
+	     TP_PROTO(char *state, char *event, char *next_state, bool final_state),
+	     TP_ARGS(state, event, next_state, final_state));
+
+DEFINE_EVENT(error_da_monitor, error_wip,
+	     TP_PROTO(char *state, char *event),
+	     TP_ARGS(state, event));
+#endif /* CONFIG_RV_MON_WIP */

kernel/trace/rv/monitors/wwnr/Kconfig

@@ -0,0 +1,11 @@
+config RV_MON_WWNR
+	depends on RV
+	select DA_MON_EVENTS_ID
+	bool "wwnr monitor"
+	help
+	  Enable wwnr (wakeup while not running) sample monitor, this is a
+	  sample monitor that illustrates the usage of per-task monitor.
+	  The model is borken on purpose: it serves to test reactors.
+
+	  For further information, see:
+	    Documentation/trace/rv/monitor_wwnr.rst

kernel/trace/rv/monitors/wwnr/wwnr.c

@@ -10,7 +10,7 @@
 
 #define MODULE_NAME "wwnr"
 
-#include <trace/events/rv.h>
+#include <rv_trace.h>
 #include <trace/events/sched.h>
 
 #include "wwnr.h"

kernel/trace/rv/monitors/wwnr/wwnr_trace.h

@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/*
+ * Snippet to be included in rv_trace.h
+ */
+
+#ifdef CONFIG_RV_MON_WWNR
+/* id is the pid of the task */
+DEFINE_EVENT(event_da_monitor_id, event_wwnr,
+	     TP_PROTO(int id, char *state, char *event, char *next_state, bool final_state),
+	     TP_ARGS(id, state, event, next_state, final_state));
+
+DEFINE_EVENT(error_da_monitor_id, error_wwnr,
+	     TP_PROTO(int id, char *state, char *event),
+	     TP_ARGS(id, state, event));
+#endif /* CONFIG_RV_MON_WWNR */

kernel/trace/rv/rv.c

@@ -145,7 +145,7 @@
 
 #ifdef CONFIG_DA_MON_EVENTS
 #define CREATE_TRACE_POINTS
-#include <trace/events/rv.h>
+#include <rv_trace.h>
 #endif
 
 #include "rv.h"

kernel/trace/rv/rv_trace.h

@@ -57,15 +57,8 @@ DECLARE_EVENT_CLASS(error_da_monitor,
 		__entry->state)
 );
 
-#ifdef CONFIG_RV_MON_WIP
+#include <monitors/wip/wip_trace.h>
-DEFINE_EVENT(event_da_monitor, event_wip,
-	    TP_PROTO(char *state, char *event, char *next_state, bool final_state),
-	    TP_ARGS(state, event, next_state, final_state));
 
-DEFINE_EVENT(error_da_monitor, error_wip,
-	     TP_PROTO(char *state, char *event),
-	     TP_ARGS(state, event));
-#endif /* CONFIG_RV_MON_WIP */
 #endif /* CONFIG_DA_MON_EVENTS_IMPLICIT */
 
 #ifdef CONFIG_DA_MON_EVENTS_ID
@@ -123,20 +116,13 @@ DECLARE_EVENT_CLASS(error_da_monitor_id,
 		__entry->state)
 );
 
-#ifdef CONFIG_RV_MON_WWNR
+#include <monitors/wwnr/wwnr_trace.h>
-/* id is the pid of the task */
-DEFINE_EVENT(event_da_monitor_id, event_wwnr,
-	     TP_PROTO(int id, char *state, char *event, char *next_state, bool final_state),
-	     TP_ARGS(id, state, event, next_state, final_state));
-
-DEFINE_EVENT(error_da_monitor_id, error_wwnr,
-	     TP_PROTO(int id, char *state, char *event),
-	     TP_ARGS(id, state, event));
-#endif /* CONFIG_RV_MON_WWNR */
 
 #endif /* CONFIG_DA_MON_EVENTS_ID */
 #endif /* _TRACE_RV_H */
 
 /* This part ust be outside protection */
 #undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#define TRACE_INCLUDE_FILE rv_trace
 #include <trace/define_trace.h>