89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/ftrace.h>
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#include <linux/tracepoint.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/rv.h>
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#include <rv/instrumentation.h>
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#include <rv/da_monitor.h>
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#define MODULE_NAME "wip"
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#include <trace/events/rv.h>
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#include <trace/events/sched.h>
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#include <trace/events/preemptirq.h>
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#include "wip.h"
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static struct rv_monitor rv_wip;
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DECLARE_DA_MON_PER_CPU(wip, unsigned char);
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static void handle_preempt_disable(void *data, unsigned long ip, unsigned long parent_ip)
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{
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da_handle_event_wip(preempt_disable_wip);
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}
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static void handle_preempt_enable(void *data, unsigned long ip, unsigned long parent_ip)
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{
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da_handle_start_event_wip(preempt_enable_wip);
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}
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static void handle_sched_waking(void *data, struct task_struct *task)
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{
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da_handle_event_wip(sched_waking_wip);
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}
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static int enable_wip(void)
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{
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int retval;
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retval = da_monitor_init_wip();
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if (retval)
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return retval;
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rv_attach_trace_probe("wip", preempt_enable, handle_preempt_enable);
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rv_attach_trace_probe("wip", sched_waking, handle_sched_waking);
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rv_attach_trace_probe("wip", preempt_disable, handle_preempt_disable);
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return 0;
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}
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static void disable_wip(void)
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{
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rv_wip.enabled = 0;
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rv_detach_trace_probe("wip", preempt_disable, handle_preempt_disable);
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rv_detach_trace_probe("wip", preempt_enable, handle_preempt_enable);
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rv_detach_trace_probe("wip", sched_waking, handle_sched_waking);
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da_monitor_destroy_wip();
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}
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static struct rv_monitor rv_wip = {
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.name = "wip",
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.description = "wakeup in preemptive per-cpu testing monitor.",
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.enable = enable_wip,
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.disable = disable_wip,
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.reset = da_monitor_reset_all_wip,
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.enabled = 0,
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};
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static int __init register_wip(void)
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{
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rv_register_monitor(&rv_wip);
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return 0;
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}
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static void __exit unregister_wip(void)
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{
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rv_unregister_monitor(&rv_wip);
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}
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module_init(register_wip);
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module_exit(unregister_wip);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Daniel Bristot de Oliveira <bristot@kernel.org>");
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MODULE_DESCRIPTION("wip: wakeup in preemptive - per-cpu sample monitor.");
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