1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/ftrace.h>
3 #include <linux/tracepoint.h>
4 #include <linux/kernel.h>
5 #include <linux/module.h>
6 #include <linux/init.h>
7 #include <linux/rv.h>
8 #include <rv/instrumentation.h>
9
10 #define MODULE_NAME "wip"
11
12 #include <rv_trace.h>
13 #include <trace/events/sched.h>
14 #include <trace/events/preemptirq.h>
15
16 #define RV_MON_TYPE RV_MON_PER_CPU
17 #include "wip.h"
18 #include <rv/da_monitor.h>
19
handle_preempt_disable(void * data,unsigned long ip,unsigned long parent_ip)20 static void handle_preempt_disable(void *data, unsigned long ip, unsigned long parent_ip)
21 {
22 da_handle_event(preempt_disable_wip);
23 }
24
handle_preempt_enable(void * data,unsigned long ip,unsigned long parent_ip)25 static void handle_preempt_enable(void *data, unsigned long ip, unsigned long parent_ip)
26 {
27 da_handle_start_event(preempt_enable_wip);
28 }
29
handle_sched_waking(void * data,struct task_struct * task)30 static void handle_sched_waking(void *data, struct task_struct *task)
31 {
32 da_handle_event(sched_waking_wip);
33 }
34
enable_wip(void)35 static int enable_wip(void)
36 {
37 int retval;
38
39 retval = da_monitor_init();
40 if (retval)
41 return retval;
42
43 rv_attach_trace_probe("wip", preempt_enable, handle_preempt_enable);
44 rv_attach_trace_probe("wip", sched_waking, handle_sched_waking);
45 rv_attach_trace_probe("wip", preempt_disable, handle_preempt_disable);
46
47 return 0;
48 }
49
disable_wip(void)50 static void disable_wip(void)
51 {
52 rv_this.enabled = 0;
53
54 rv_detach_trace_probe("wip", preempt_disable, handle_preempt_disable);
55 rv_detach_trace_probe("wip", preempt_enable, handle_preempt_enable);
56 rv_detach_trace_probe("wip", sched_waking, handle_sched_waking);
57
58 da_monitor_destroy();
59 }
60
61 static struct rv_monitor rv_this = {
62 .name = "wip",
63 .description = "wakeup in preemptive per-cpu testing monitor.",
64 .enable = enable_wip,
65 .disable = disable_wip,
66 .reset = da_monitor_reset_all,
67 .enabled = 0,
68 };
69
register_wip(void)70 static int __init register_wip(void)
71 {
72 return rv_register_monitor(&rv_this, NULL);
73 }
74
unregister_wip(void)75 static void __exit unregister_wip(void)
76 {
77 rv_unregister_monitor(&rv_this);
78 }
79
80 module_init(register_wip);
81 module_exit(unregister_wip);
82
83 MODULE_LICENSE("GPL");
84 MODULE_AUTHOR("Daniel Bristot de Oliveira <bristot@kernel.org>");
85 MODULE_DESCRIPTION("wip: wakeup in preemptive - per-cpu sample monitor.");
86