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// 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 "wwnr"
#include <trace/events/rv.h>
#include <trace/events/sched.h>
#include "wwnr.h"
static struct rv_monitor rv_wwnr;
DECLARE_DA_MON_PER_TASK(wwnr, unsigned char);
static void handle_switch(void *data, bool preempt, struct task_struct *p,
struct task_struct *n, unsigned int prev_state)
{
/* start monitoring only after the first suspension */
if (prev_state == TASK_INTERRUPTIBLE)
da_handle_start_event_wwnr(p, switch_out_wwnr);
else
da_handle_event_wwnr(p, switch_out_wwnr);
da_handle_event_wwnr(n, switch_in_wwnr);
}
static void handle_wakeup(void *data, struct task_struct *p)
{
da_handle_event_wwnr(p, wakeup_wwnr);
}
static int enable_wwnr(void)
{
int retval;
retval = da_monitor_init_wwnr();
if (retval)
return retval;
rv_attach_trace_probe("wwnr", sched_switch, handle_switch);
rv_attach_trace_probe("wwnr", sched_wakeup, handle_wakeup);
return 0;
}
static void disable_wwnr(void)
{
rv_wwnr.enabled = 0;
rv_detach_trace_probe("wwnr", sched_switch, handle_switch);
rv_detach_trace_probe("wwnr", sched_wakeup, handle_wakeup);
da_monitor_destroy_wwnr();
}
static struct rv_monitor rv_wwnr = {
.name = "wwnr",
.description = "wakeup while not running per-task testing model.",
.enable = enable_wwnr,
.disable = disable_wwnr,
.reset = da_monitor_reset_all_wwnr,
.enabled = 0,
};
static int __init register_wwnr(void)
{
rv_register_monitor(&rv_wwnr);
return 0;
}
static void __exit unregister_wwnr(void)
{
rv_unregister_monitor(&rv_wwnr);
}
module_init(register_wwnr);
module_exit(unregister_wwnr);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Daniel Bristot de Oliveira <bristot@kernel.org>");
MODULE_DESCRIPTION("wwnr: wakeup while not running monitor");
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