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Diffstat (limited to 'kernel/trace/rv/monitors/wip/wip.c')
-rw-r--r--kernel/trace/rv/monitors/wip/wip.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/kernel/trace/rv/monitors/wip/wip.c b/kernel/trace/rv/monitors/wip/wip.c
new file mode 100644
index 000000000..b2b49a27e
--- /dev/null
+++ b/kernel/trace/rv/monitors/wip/wip.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/ftrace.h>
+#include <linux/tracepoint.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/rv.h>
+#include <rv/instrumentation.h>
+#include <rv/da_monitor.h>
+
+#define MODULE_NAME "wip"
+
+#include <trace/events/rv.h>
+#include <trace/events/sched.h>
+#include <trace/events/preemptirq.h>
+
+#include "wip.h"
+
+static struct rv_monitor rv_wip;
+DECLARE_DA_MON_PER_CPU(wip, unsigned char);
+
+static void handle_preempt_disable(void *data, unsigned long ip, unsigned long parent_ip)
+{
+ da_handle_event_wip(preempt_disable_wip);
+}
+
+static void handle_preempt_enable(void *data, unsigned long ip, unsigned long parent_ip)
+{
+ da_handle_start_event_wip(preempt_enable_wip);
+}
+
+static void handle_sched_waking(void *data, struct task_struct *task)
+{
+ da_handle_event_wip(sched_waking_wip);
+}
+
+static int enable_wip(void)
+{
+ int retval;
+
+ retval = da_monitor_init_wip();
+ if (retval)
+ return retval;
+
+ rv_attach_trace_probe("wip", preempt_enable, handle_preempt_enable);
+ rv_attach_trace_probe("wip", sched_waking, handle_sched_waking);
+ rv_attach_trace_probe("wip", preempt_disable, handle_preempt_disable);
+
+ return 0;
+}
+
+static void disable_wip(void)
+{
+ rv_wip.enabled = 0;
+
+ rv_detach_trace_probe("wip", preempt_disable, handle_preempt_disable);
+ rv_detach_trace_probe("wip", preempt_enable, handle_preempt_enable);
+ rv_detach_trace_probe("wip", sched_waking, handle_sched_waking);
+
+ da_monitor_destroy_wip();
+}
+
+static struct rv_monitor rv_wip = {
+ .name = "wip",
+ .description = "wakeup in preemptive per-cpu testing monitor.",
+ .enable = enable_wip,
+ .disable = disable_wip,
+ .reset = da_monitor_reset_all_wip,
+ .enabled = 0,
+};
+
+static int __init register_wip(void)
+{
+ rv_register_monitor(&rv_wip);
+ return 0;
+}
+
+static void __exit unregister_wip(void)
+{
+ rv_unregister_monitor(&rv_wip);
+}
+
+module_init(register_wip);
+module_exit(unregister_wip);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Daniel Bristot de Oliveira <bristot@kernel.org>");
+MODULE_DESCRIPTION("wip: wakeup in preemptive - per-cpu sample monitor.");