mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 23:40:54 +07:00
eeeb080bae
Since kprobes breakpoint handling involves hardirq tracer, probing these functions cause breakpoint recursion problem. Prohibit probing on those functions. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrea Righi <righi.andrea@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/154998802073.31052.17255044712514564153.stgit@devbox Signed-off-by: Ingo Molnar <mingo@kernel.org>
95 lines
2.3 KiB
C
95 lines
2.3 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>
|
|
#include <linux/kprobes.h>
|
|
#include "trace.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)) {
|
|
if (!in_nmi())
|
|
trace_irq_enable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
|
|
tracer_hardirqs_on(CALLER_ADDR0, CALLER_ADDR1);
|
|
this_cpu_write(tracing_irq_cpu, 0);
|
|
}
|
|
|
|
lockdep_hardirqs_on(CALLER_ADDR0);
|
|
}
|
|
EXPORT_SYMBOL(trace_hardirqs_on);
|
|
NOKPROBE_SYMBOL(trace_hardirqs_on);
|
|
|
|
void trace_hardirqs_off(void)
|
|
{
|
|
if (!this_cpu_read(tracing_irq_cpu)) {
|
|
this_cpu_write(tracing_irq_cpu, 1);
|
|
tracer_hardirqs_off(CALLER_ADDR0, CALLER_ADDR1);
|
|
if (!in_nmi())
|
|
trace_irq_disable_rcuidle(CALLER_ADDR0, CALLER_ADDR1);
|
|
}
|
|
|
|
lockdep_hardirqs_off(CALLER_ADDR0);
|
|
}
|
|
EXPORT_SYMBOL(trace_hardirqs_off);
|
|
NOKPROBE_SYMBOL(trace_hardirqs_off);
|
|
|
|
__visible void trace_hardirqs_on_caller(unsigned long caller_addr)
|
|
{
|
|
if (this_cpu_read(tracing_irq_cpu)) {
|
|
if (!in_nmi())
|
|
trace_irq_enable_rcuidle(CALLER_ADDR0, caller_addr);
|
|
tracer_hardirqs_on(CALLER_ADDR0, caller_addr);
|
|
this_cpu_write(tracing_irq_cpu, 0);
|
|
}
|
|
|
|
lockdep_hardirqs_on(CALLER_ADDR0);
|
|
}
|
|
EXPORT_SYMBOL(trace_hardirqs_on_caller);
|
|
NOKPROBE_SYMBOL(trace_hardirqs_on_caller);
|
|
|
|
__visible void trace_hardirqs_off_caller(unsigned long caller_addr)
|
|
{
|
|
if (!this_cpu_read(tracing_irq_cpu)) {
|
|
this_cpu_write(tracing_irq_cpu, 1);
|
|
tracer_hardirqs_off(CALLER_ADDR0, caller_addr);
|
|
if (!in_nmi())
|
|
trace_irq_disable_rcuidle(CALLER_ADDR0, caller_addr);
|
|
}
|
|
|
|
lockdep_hardirqs_off(CALLER_ADDR0);
|
|
}
|
|
EXPORT_SYMBOL(trace_hardirqs_off_caller);
|
|
NOKPROBE_SYMBOL(trace_hardirqs_off_caller);
|
|
#endif /* CONFIG_TRACE_IRQFLAGS */
|
|
|
|
#ifdef CONFIG_TRACE_PREEMPT_TOGGLE
|
|
|
|
void trace_preempt_on(unsigned long a0, unsigned long a1)
|
|
{
|
|
if (!in_nmi())
|
|
trace_preempt_enable_rcuidle(a0, a1);
|
|
tracer_preempt_on(a0, a1);
|
|
}
|
|
|
|
void trace_preempt_off(unsigned long a0, unsigned long a1)
|
|
{
|
|
if (!in_nmi())
|
|
trace_preempt_disable_rcuidle(a0, a1);
|
|
tracer_preempt_off(a0, a1);
|
|
}
|
|
#endif
|