forked from Minki/linux
73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/*
|
||
|
|
* preemptoff and irqoff tracepoints
|
||
|
|
*
|
||
|
|
* Copyright (C) Joel Fernandes (Google) <joel@joelfernandes.org>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kallsyms.h>
|
||
|
|
#include <linux/uaccess.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/ftrace.h>
|
||
|
|
|
||
|
|
#define CREATE_TRACE_POINTS
|
||
|
|
#include <trace/events/preemptirq.h>
|
||
|
|
|
||
|
|
#ifdef CONFIG_TRACE_IRQFLAGS
|
||
|
|
/* Per-cpu variable to prevent redundant calls when IRQs already off */
|
||
|
|
static DEFINE_PER_CPU(int, tracing_irq_cpu);
|
||
|
|
|
||
|
|
void trace_hardirqs_on(void)
|
||
|
|
{
|
||
|
|
if (!this_cpu_read(tracing_irq_cpu))
|
||
|
|
return;
|
||
|
|
|
||
|
|
trace_irq_enable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
|
||
|
|
this_cpu_write(tracing_irq_cpu, 0);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(trace_hardirqs_on);
|
||
|
|
|
||
|
|
void trace_hardirqs_off(void)
|
||
|
|
{
|
||
|
|
if (this_cpu_read(tracing_irq_cpu))
|
||
|
|
return;
|
||
|
|
|
||
|
|
this_cpu_write(tracing_irq_cpu, 1);
|
||
|
|
trace_irq_disable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(trace_hardirqs_off);
|
||
|
|
|
||
|
|
__visible void trace_hardirqs_on_caller(unsigned long caller_addr)
|
||
|
|
{
|
||
|
|
if (!this_cpu_read(tracing_irq_cpu))
|
||
|
|
return;
|
||
|
|
|
||
|
|
trace_irq_enable_rcuidle(CALLER_ADDR0, caller_addr);
|
||
|
|
this_cpu_write(tracing_irq_cpu, 0);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(trace_hardirqs_on_caller);
|
||
|
|
|
||
|
|
__visible void trace_hardirqs_off_caller(unsigned long caller_addr)
|
||
|
|
{
|
||
|
|
if (this_cpu_read(tracing_irq_cpu))
|
||
|
|
return;
|
||
|
|
|
||
|
|
this_cpu_write(tracing_irq_cpu, 1);
|
||
|
|
trace_irq_disable_rcuidle(CALLER_ADDR0, caller_addr);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(trace_hardirqs_off_caller);
|
||
|
|
#endif /* CONFIG_TRACE_IRQFLAGS */
|
||
|
|
|
||
|
|
#ifdef CONFIG_TRACE_PREEMPT_TOGGLE
|
||
|
|
|
||
|
|
void trace_preempt_on(unsigned long a0, unsigned long a1)
|
||
|
|
{
|
||
|
|
trace_preempt_enable_rcuidle(a0, a1);
|
||
|
|
}
|
||
|
|
|
||
|
|
void trace_preempt_off(unsigned long a0, unsigned long a1)
|
||
|
|
{
|
||
|
|
trace_preempt_disable_rcuidle(a0, a1);
|
||
|
|
}
|
||
|
|
#endif
|