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58d5f0d437
Monitors generated with dot2k have their registration function (the one called during monitor initialisation) return always 0, even if the registration failed on RV side. This can hide potential errors. Return the value returned by the RV register function. Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Tomas Glozar <tglozar@redhat.com> Cc: Juri Lelli <jlelli@redhat.com> Cc: Clark Williams <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Link: https://lore.kernel.org/20250723161240.194860-6-gmonaco@redhat.com Reviewed-by: Nam Cao <namcao@linutronix.de> Signed-off-by: Gabriele Monaco <gmonaco@redhat.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
// 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 "wwnr"
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#include <rv_trace.h>
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#include <trace/events/sched.h>
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#include "wwnr.h"
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static struct rv_monitor rv_wwnr;
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DECLARE_DA_MON_PER_TASK(wwnr, unsigned char);
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static void handle_switch(void *data, bool preempt, struct task_struct *p,
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struct task_struct *n, unsigned int prev_state)
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{
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/* start monitoring only after the first suspension */
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if (prev_state == TASK_INTERRUPTIBLE)
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da_handle_start_event_wwnr(p, switch_out_wwnr);
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else
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da_handle_event_wwnr(p, switch_out_wwnr);
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da_handle_event_wwnr(n, switch_in_wwnr);
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}
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static void handle_wakeup(void *data, struct task_struct *p)
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{
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da_handle_event_wwnr(p, wakeup_wwnr);
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}
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static int enable_wwnr(void)
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{
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int retval;
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retval = da_monitor_init_wwnr();
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if (retval)
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return retval;
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rv_attach_trace_probe("wwnr", sched_switch, handle_switch);
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rv_attach_trace_probe("wwnr", sched_wakeup, handle_wakeup);
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return 0;
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}
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static void disable_wwnr(void)
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{
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rv_wwnr.enabled = 0;
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rv_detach_trace_probe("wwnr", sched_switch, handle_switch);
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rv_detach_trace_probe("wwnr", sched_wakeup, handle_wakeup);
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da_monitor_destroy_wwnr();
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}
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static struct rv_monitor rv_wwnr = {
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.name = "wwnr",
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.description = "wakeup while not running per-task testing model.",
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.enable = enable_wwnr,
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.disable = disable_wwnr,
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.reset = da_monitor_reset_all_wwnr,
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.enabled = 0,
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};
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static int __init register_wwnr(void)
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{
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return rv_register_monitor(&rv_wwnr, NULL);
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}
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static void __exit unregister_wwnr(void)
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{
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rv_unregister_monitor(&rv_wwnr);
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}
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module_init(register_wwnr);
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module_exit(unregister_wwnr);
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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("wwnr: wakeup while not running monitor");
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