linux-kernel - [RFC PATCH 09/16] rv/monitors: wip instrumentation and Makefile/Kconfig entries

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Date:   Wed, 19 May 2021 13:36:30 +0200
From:   Daniel Bristot de Oliveira <bristot@...hat.com>
To:     linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>
Cc:     Tommaso Cucinotta <tommaso.cucinotta@...tannapisa.it>,
        Kate Carcia <kcarcia@...hat.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Ingo Molnar <mingo@...hat.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Gabriele Paoloni <gabriele.paoloni@...el.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Clark Williams <williams@...hat.com>, linux-doc@...r.kernel.org
Subject: [RFC PATCH 09/16] rv/monitors: wip instrumentation and Makefile/Kconfig entries

Adds the instrumentation to the previously created wip monitor, as an
example of the developer work. It also adds a Makefile and Kconfig
entries.

This is a good example of the manual work that is left for the
developer to do.

Cc: Jonathan Corbet <corbet@....net>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Will Deacon <will@...nel.org>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: "Paul E. McKenney" <paulmck@...nel.org>
Cc: Joel Fernandes <joel@...lfernandes.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Gabriele Paoloni <gabriele.paoloni@...el.com>
Cc: Juri Lelli <juri.lelli@...hat.com>
Cc: Clark Williams <williams@...hat.com>
Cc: linux-doc@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Daniel Bristot de Oliveira <bristot@...hat.com>
---
 kernel/trace/rv/Kconfig            |  7 +++++++
 kernel/trace/rv/Makefile           |  1 +
 kernel/trace/rv/monitors/wip/wip.c | 16 ++++++++--------
 kernel/trace/rv/monitors/wip/wip.h |  2 +-
 4 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/kernel/trace/rv/Kconfig b/kernel/trace/rv/Kconfig
index 74eb2f216255..4a1088c5ba68 100644
--- a/kernel/trace/rv/Kconfig
+++ b/kernel/trace/rv/Kconfig
@@ -14,6 +14,13 @@ menuconfig RV
 
 if RV
 
+config RV_MON_WIP
+	depends on PREEMPTIRQ_TRACEPOINTS
+	tristate "WIP monitor"
+	help
+	  Enable WIP sample monitor, this is a sample monitor that
+	  illustrates the usage of per-cpu monitors.
+
 config RV_REACTORS
 	bool "Runtime verification reactors"
 	default y if RV
diff --git a/kernel/trace/rv/Makefile b/kernel/trace/rv/Makefile
index 8944274d9b41..b41109d2750a 100644
--- a/kernel/trace/rv/Makefile
+++ b/kernel/trace/rv/Makefile
@@ -2,3 +2,4 @@
 
 obj-$(CONFIG_RV) += rv.o
 obj-$(CONFIG_RV_REACTORS) += rv_reactors.o
+obj-$(CONFIG_RV_MON_WIP) += monitors/wip/wip.o
diff --git a/kernel/trace/rv/monitors/wip/wip.c b/kernel/trace/rv/monitors/wip/wip.c
index 1aec75e683d2..dd35a042e727 100644
--- a/kernel/trace/rv/monitors/wip/wip.c
+++ b/kernel/trace/rv/monitors/wip/wip.c
@@ -33,36 +33,36 @@ DECLARE_DA_MON_PER_CPU(wip, char);
  *
  */
 
-void handle_preempt_disable(void *data, /* XXX: fill header */)
+void handle_preempt_disable(void *data, unsigned long ip, unsigned long parent_ip)
 {
 	da_handle_event_wip(preempt_disable);
 }
 
-void handle_preempt_enable(void *data, /* XXX: fill header */)
+void handle_preempt_enable(void *data, unsigned long ip, unsigned long parent_ip)
 {
-	da_handle_event_wip(preempt_enable);
+	da_handle_init_event_wip(preempt_enable);
 }
 
-void handle_sched_waking(void *data, /* XXX: fill header */)
+void handle_sched_waking(void *data, struct task_struct *task)
 {
 	da_handle_event_wip(sched_waking);
 }
 
-#define NR_TP   3
+#define NR_TP	3
 static struct tracepoint_hook_helper tracepoints_to_hook[NR_TP] = {
 	{
 		.probe = handle_preempt_disable,
-		.name = /* XXX: tracepoint name here */,
+		.name = "preempt_disable",
 		.registered = 0
 	},
 	{
 		.probe = handle_preempt_enable,
-		.name = /* XXX: tracepoint name here */,
+		.name = "preempt_enable",
 		.registered = 0
 	},
 	{
 		.probe = handle_sched_waking,
-		.name = /* XXX: tracepoint name here */,
+		.name = "sched_wakeup",
 		.registered = 0
 	},
 };
diff --git a/kernel/trace/rv/monitors/wip/wip.h b/kernel/trace/rv/monitors/wip/wip.h
index 7a751a8896e9..f980b5e85940 100644
--- a/kernel/trace/rv/monitors/wip/wip.h
+++ b/kernel/trace/rv/monitors/wip/wip.h
@@ -59,6 +59,6 @@ TRACE_EVENT(error_wip,
 
 /* This part ust be outside protection */
 #undef TRACE_INCLUDE_PATH
-#define TRACE_INCLUDE_PATH .
+#define TRACE_INCLUDE_PATH ../kernel/trace/rv/monitors/wip/
 #define TRACE_INCLUDE_FILE wip
 #include <trace/define_trace.h>
-- 
2.26.2