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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 "sco"
#include <trace/events/sched.h>
#include <rv_trace.h>
#include <monitors/sched/sched.h>
#include "sco.h"
static struct rv_monitor rv_sco;
DECLARE_DA_MON_PER_CPU(sco, unsigned char);
static void handle_sched_set_state(void *data, struct task_struct *tsk, int state)
{
da_handle_start_event_sco(sched_set_state_sco);
}
static void handle_schedule_entry(void *data, bool preempt, unsigned long ip)
{
da_handle_event_sco(schedule_entry_sco);
}
static void handle_schedule_exit(void *data, bool is_switch, unsigned long ip)
{
da_handle_start_event_sco(schedule_exit_sco);
}
static int enable_sco(void)
{
int retval;
retval = da_monitor_init_sco();
if (retval)
return retval;
rv_attach_trace_probe("sco", sched_set_state_tp, handle_sched_set_state);
rv_attach_trace_probe("sco", sched_entry_tp, handle_schedule_entry);
rv_attach_trace_probe("sco", sched_exit_tp, handle_schedule_exit);
return 0;
}
static void disable_sco(void)
{
rv_sco.enabled = 0;
rv_detach_trace_probe("sco", sched_set_state_tp, handle_sched_set_state);
rv_detach_trace_probe("sco", sched_entry_tp, handle_schedule_entry);
rv_detach_trace_probe("sco", sched_exit_tp, handle_schedule_exit);
da_monitor_destroy_sco();
}
static struct rv_monitor rv_sco = {
.name = "sco",
.description = "scheduling context operations.",
.enable = enable_sco,
.disable = disable_sco,
.reset = da_monitor_reset_all_sco,
.enabled = 0,
};
static int __init register_sco(void)
{
rv_register_monitor(&rv_sco, &rv_sched);
return 0;
}
static void __exit unregister_sco(void)
{
rv_unregister_monitor(&rv_sco);
}
module_init(register_sco);
module_exit(unregister_sco);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Gabriele Monaco <gmonaco@redhat.com>");
MODULE_DESCRIPTION("sco: scheduling context operations.");
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