linux-kernel - [PATCH v4 14/22] rv: Add rtapp container monitor

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Message-Id: <4c1256e8b482ee4d40742e1304f09c2f8da253bd.1745390829.git.namcao@linutronix.de>
Date: Wed, 23 Apr 2025 08:50:09 +0200
From: Nam Cao <namcao@...utronix.de>
To: Steven Rostedt <rostedt@...dmis.org>,
	Gabriele Monaco <gmonaco@...hat.com>,
	linux-trace-kernel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: john.ogness@...utronix.de,
	Nam Cao <namcao@...utronix.de>
Subject: [PATCH v4 14/22] rv: Add rtapp container monitor

Add the container "rtapp" which is the monitor collection for detecting
problems with real-time applications. The monitors will be added in the
follow-up commits.

Reviewed-by: Gabriele Monaco <gmonaco@...hat.com>
Signed-off-by: Nam Cao <namcao@...utronix.de>
---
 kernel/trace/rv/Kconfig                |  1 +
 kernel/trace/rv/Makefile               |  1 +
 kernel/trace/rv/monitors/rtapp/Kconfig |  6 +++++
 kernel/trace/rv/monitors/rtapp/rtapp.c | 33 ++++++++++++++++++++++++++
 kernel/trace/rv/monitors/rtapp/rtapp.h |  3 +++
 5 files changed, 44 insertions(+)
 create mode 100644 kernel/trace/rv/monitors/rtapp/Kconfig
 create mode 100644 kernel/trace/rv/monitors/rtapp/rtapp.c
 create mode 100644 kernel/trace/rv/monitors/rtapp/rtapp.h

diff --git a/kernel/trace/rv/Kconfig b/kernel/trace/rv/Kconfig
index 6e157f964991..5c407d291661 100644
--- a/kernel/trace/rv/Kconfig
+++ b/kernel/trace/rv/Kconfig
@@ -41,6 +41,7 @@ source "kernel/trace/rv/monitors/snroc/Kconfig"
 source "kernel/trace/rv/monitors/scpd/Kconfig"
 source "kernel/trace/rv/monitors/snep/Kconfig"
 source "kernel/trace/rv/monitors/sncid/Kconfig"
+source "kernel/trace/rv/monitors/rtapp/Kconfig"
 # Add new monitors here
 
 config RV_REACTORS
diff --git a/kernel/trace/rv/Makefile b/kernel/trace/rv/Makefile
index f9b2cd0483c3..9b28c2419995 100644
--- a/kernel/trace/rv/Makefile
+++ b/kernel/trace/rv/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_RV_MON_SNROC) += monitors/snroc/snroc.o
 obj-$(CONFIG_RV_MON_SCPD) += monitors/scpd/scpd.o
 obj-$(CONFIG_RV_MON_SNEP) += monitors/snep/snep.o
 obj-$(CONFIG_RV_MON_SNCID) += monitors/sncid/sncid.o
+obj-$(CONFIG_RV_MON_RTAPP) += monitors/rtapp/rtapp.o
 # Add new monitors here
 obj-$(CONFIG_RV_REACTORS) += rv_reactors.o
 obj-$(CONFIG_RV_REACT_PRINTK) += reactor_printk.o
diff --git a/kernel/trace/rv/monitors/rtapp/Kconfig b/kernel/trace/rv/monitors/rtapp/Kconfig
new file mode 100644
index 000000000000..94689d66a79c
--- /dev/null
+++ b/kernel/trace/rv/monitors/rtapp/Kconfig
@@ -0,0 +1,6 @@
+config RV_MON_RTAPP
+	depends on RV
+	bool "rtapp monitor"
+	help
+	  Collection of monitors to check for common problems with real-time application that cause
+	  unexpected latency.
diff --git a/kernel/trace/rv/monitors/rtapp/rtapp.c b/kernel/trace/rv/monitors/rtapp/rtapp.c
new file mode 100644
index 000000000000..fd75fc927d65
--- /dev/null
+++ b/kernel/trace/rv/monitors/rtapp/rtapp.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/rv.h>
+
+#define MODULE_NAME "rtapp"
+
+#include "rtapp.h"
+
+struct rv_monitor rv_rtapp;
+
+struct rv_monitor rv_rtapp = {
+	.name = "rtapp",
+	.description = "Collection of monitors for detecting problems with real-time applications",
+};
+
+static int __init register_rtapp(void)
+{
+	return rv_register_monitor(&rv_rtapp, NULL);
+}
+
+static void __exit unregister_rtapp(void)
+{
+	rv_unregister_monitor(&rv_rtapp);
+}
+
+module_init(register_rtapp);
+module_exit(unregister_rtapp);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Nam Cao <namcao@...utronix.de>");
+MODULE_DESCRIPTION("Collection of monitors for detecting problems with real-time applications");
diff --git a/kernel/trace/rv/monitors/rtapp/rtapp.h b/kernel/trace/rv/monitors/rtapp/rtapp.h
new file mode 100644
index 000000000000..4c200d67c7f6
--- /dev/null
+++ b/kernel/trace/rv/monitors/rtapp/rtapp.h
@@ -0,0 +1,3 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+extern struct rv_monitor rv_rtapp;
-- 
2.39.5