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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
2 KiB
C
87 lines
2 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 "wip"
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#include <rv_trace.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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return rv_register_monitor(&rv_wip, NULL);
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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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