Contributors: 33
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Ingo Molnar |
143 |
17.06% |
4 |
5.06% |
| Thomas Gleixner |
85 |
10.14% |
8 |
10.13% |
| Doug Anderson |
74 |
8.83% |
10 |
12.66% |
| Chris Metcalf |
68 |
8.11% |
2 |
2.53% |
| Peter Zijlstra |
58 |
6.92% |
4 |
5.06% |
| Paul E. McKenney |
44 |
5.25% |
1 |
1.27% |
| Ulrich Obergfell |
43 |
5.13% |
5 |
6.33% |
| Russell King |
39 |
4.65% |
3 |
3.80% |
| Nicholas Piggin |
37 |
4.42% |
2 |
2.53% |
| Don Zickus |
32 |
3.82% |
5 |
6.33% |
| Linus Torvalds (pre-git) |
32 |
3.82% |
6 |
7.59% |
| Aaron Tomlin |
29 |
3.46% |
2 |
2.53% |
| Babu Moger |
23 |
2.74% |
1 |
1.27% |
| Song Liu |
22 |
2.63% |
1 |
1.27% |
| Petr Mladek |
16 |
1.91% |
4 |
5.06% |
| Guenter Roeck |
15 |
1.79% |
1 |
1.27% |
| Linus Torvalds |
10 |
1.19% |
1 |
1.27% |
| Laurent Dufour |
10 |
1.19% |
1 |
1.27% |
| Jiri Kosina |
8 |
0.95% |
1 |
1.27% |
| Andi Kleen |
7 |
0.84% |
2 |
2.53% |
| Lecopzer Chen |
7 |
0.84% |
2 |
2.53% |
| Andrew Morton |
6 |
0.72% |
1 |
1.27% |
| Mandeep Singh Baines |
6 |
0.72% |
2 |
2.53% |
| Tomasz Nowicki |
5 |
0.60% |
1 |
1.27% |
| Marcelo Tosatti |
4 |
0.48% |
1 |
1.27% |
| Jason Wessel |
3 |
0.36% |
1 |
1.27% |
| Tejun Heo |
3 |
0.36% |
1 |
1.27% |
| Michal Schmidt |
3 |
0.36% |
1 |
1.27% |
| Wim Van Sebroeck |
2 |
0.24% |
1 |
1.27% |
| Frédéric Weisbecker |
1 |
0.12% |
1 |
1.27% |
| Stéphane Eranian |
1 |
0.12% |
1 |
1.27% |
| Mathieu Malaterre |
1 |
0.12% |
1 |
1.27% |
| Greg Kroah-Hartman |
1 |
0.12% |
1 |
1.27% |
| Total |
838 |
|
79 |
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* linux/include/linux/nmi.h
*/
#ifndef LINUX_NMI_H
#define LINUX_NMI_H
#include <linux/sched.h>
#include <asm/irq.h>
/* Arch specific watchdogs might need to share extra watchdog-related APIs. */
#if defined(CONFIG_HARDLOCKUP_DETECTOR_ARCH) || defined(CONFIG_HARDLOCKUP_DETECTOR_SPARC64)
#include <asm/nmi.h>
#endif
#ifdef CONFIG_LOCKUP_DETECTOR
void lockup_detector_init(void);
void lockup_detector_retry_init(void);
void lockup_detector_soft_poweroff(void);
void lockup_detector_cleanup(void);
extern int watchdog_user_enabled;
extern int watchdog_thresh;
extern unsigned long watchdog_enabled;
extern struct cpumask watchdog_cpumask;
extern unsigned long *watchdog_cpumask_bits;
#ifdef CONFIG_SMP
extern int sysctl_softlockup_all_cpu_backtrace;
extern int sysctl_hardlockup_all_cpu_backtrace;
#else
#define sysctl_softlockup_all_cpu_backtrace 0
#define sysctl_hardlockup_all_cpu_backtrace 0
#endif /* !CONFIG_SMP */
#else /* CONFIG_LOCKUP_DETECTOR */
static inline void lockup_detector_init(void) { }
static inline void lockup_detector_retry_init(void) { }
static inline void lockup_detector_soft_poweroff(void) { }
static inline void lockup_detector_cleanup(void) { }
#endif /* !CONFIG_LOCKUP_DETECTOR */
#ifdef CONFIG_SOFTLOCKUP_DETECTOR
extern void touch_softlockup_watchdog_sched(void);
extern void touch_softlockup_watchdog(void);
extern void touch_softlockup_watchdog_sync(void);
extern void touch_all_softlockup_watchdogs(void);
extern unsigned int softlockup_panic;
extern int lockup_detector_online_cpu(unsigned int cpu);
extern int lockup_detector_offline_cpu(unsigned int cpu);
#else /* CONFIG_SOFTLOCKUP_DETECTOR */
static inline void touch_softlockup_watchdog_sched(void) { }
static inline void touch_softlockup_watchdog(void) { }
static inline void touch_softlockup_watchdog_sync(void) { }
static inline void touch_all_softlockup_watchdogs(void) { }
#define lockup_detector_online_cpu NULL
#define lockup_detector_offline_cpu NULL
#endif /* CONFIG_SOFTLOCKUP_DETECTOR */
#ifdef CONFIG_DETECT_HUNG_TASK
void reset_hung_task_detector(void);
#else
static inline void reset_hung_task_detector(void) { }
#endif
/*
* The run state of the lockup detectors is controlled by the content of the
* 'watchdog_enabled' variable. Each lockup detector has its dedicated bit -
* bit 0 for the hard lockup detector and bit 1 for the soft lockup detector.
*
* 'watchdog_user_enabled', 'watchdog_hardlockup_user_enabled' and
* 'watchdog_softlockup_user_enabled' are variables that are only used as an
* 'interface' between the parameters in /proc/sys/kernel and the internal
* state bits in 'watchdog_enabled'. The 'watchdog_thresh' variable is
* handled differently because its value is not boolean, and the lockup
* detectors are 'suspended' while 'watchdog_thresh' is equal zero.
*/
#define WATCHDOG_HARDLOCKUP_ENABLED_BIT 0
#define WATCHDOG_SOFTOCKUP_ENABLED_BIT 1
#define WATCHDOG_HARDLOCKUP_ENABLED (1 << WATCHDOG_HARDLOCKUP_ENABLED_BIT)
#define WATCHDOG_SOFTOCKUP_ENABLED (1 << WATCHDOG_SOFTOCKUP_ENABLED_BIT)
#if defined(CONFIG_HARDLOCKUP_DETECTOR)
extern void hardlockup_detector_disable(void);
extern unsigned int hardlockup_panic;
#else
static inline void hardlockup_detector_disable(void) {}
#endif
/* Sparc64 has special implemetantion that is always enabled. */
#if defined(CONFIG_HARDLOCKUP_DETECTOR) || defined(CONFIG_HARDLOCKUP_DETECTOR_SPARC64)
void arch_touch_nmi_watchdog(void);
#else
static inline void arch_touch_nmi_watchdog(void) { }
#endif
#if defined(CONFIG_HARDLOCKUP_DETECTOR_COUNTS_HRTIMER)
void watchdog_hardlockup_touch_cpu(unsigned int cpu);
void watchdog_hardlockup_check(unsigned int cpu, struct pt_regs *regs);
#endif
#if defined(CONFIG_HARDLOCKUP_DETECTOR_PERF)
extern void hardlockup_detector_perf_stop(void);
extern void hardlockup_detector_perf_restart(void);
extern void hardlockup_detector_perf_cleanup(void);
extern void hardlockup_config_perf_event(const char *str);
#else
static inline void hardlockup_detector_perf_stop(void) { }
static inline void hardlockup_detector_perf_restart(void) { }
static inline void hardlockup_detector_perf_cleanup(void) { }
static inline void hardlockup_config_perf_event(const char *str) { }
#endif
void watchdog_hardlockup_stop(void);
void watchdog_hardlockup_start(void);
int watchdog_hardlockup_probe(void);
void watchdog_hardlockup_enable(unsigned int cpu);
void watchdog_hardlockup_disable(unsigned int cpu);
void lockup_detector_reconfigure(void);
#ifdef CONFIG_HARDLOCKUP_DETECTOR_BUDDY
void watchdog_buddy_check_hardlockup(int hrtimer_interrupts);
#else
static inline void watchdog_buddy_check_hardlockup(int hrtimer_interrupts) {}
#endif
/**
* touch_nmi_watchdog - manually reset the hardlockup watchdog timeout.
*
* If we support detecting hardlockups, touch_nmi_watchdog() may be
* used to pet the watchdog (reset the timeout) - for code which
* intentionally disables interrupts for a long time. This call is stateless.
*
* Though this function has "nmi" in the name, the hardlockup watchdog might
* not be backed by NMIs. This function will likely be renamed to
* touch_hardlockup_watchdog() in the future.
*/
static inline void touch_nmi_watchdog(void)
{
/*
* Pass on to the hardlockup detector selected via CONFIG_. Note that
* the hardlockup detector may not be arch-specific nor using NMIs
* and the arch_touch_nmi_watchdog() function will likely be renamed
* in the future.
*/
arch_touch_nmi_watchdog();
touch_softlockup_watchdog();
}
/*
* Create trigger_all_cpu_backtrace() out of the arch-provided
* base function. Return whether such support was available,
* to allow calling code to fall back to some other mechanism:
*/
#ifdef arch_trigger_cpumask_backtrace
static inline bool trigger_all_cpu_backtrace(void)
{
arch_trigger_cpumask_backtrace(cpu_online_mask, -1);
return true;
}
static inline bool trigger_allbutcpu_cpu_backtrace(int exclude_cpu)
{
arch_trigger_cpumask_backtrace(cpu_online_mask, exclude_cpu);
return true;
}
static inline bool trigger_cpumask_backtrace(struct cpumask *mask)
{
arch_trigger_cpumask_backtrace(mask, -1);
return true;
}
static inline bool trigger_single_cpu_backtrace(int cpu)
{
arch_trigger_cpumask_backtrace(cpumask_of(cpu), -1);
return true;
}
/* generic implementation */
void nmi_trigger_cpumask_backtrace(const cpumask_t *mask,
int exclude_cpu,
void (*raise)(cpumask_t *mask));
bool nmi_cpu_backtrace(struct pt_regs *regs);
#else
static inline bool trigger_all_cpu_backtrace(void)
{
return false;
}
static inline bool trigger_allbutcpu_cpu_backtrace(int exclude_cpu)
{
return false;
}
static inline bool trigger_cpumask_backtrace(struct cpumask *mask)
{
return false;
}
static inline bool trigger_single_cpu_backtrace(int cpu)
{
return false;
}
#endif
#ifdef CONFIG_HARDLOCKUP_DETECTOR_PERF
u64 hw_nmi_get_sample_period(int watchdog_thresh);
bool arch_perf_nmi_is_available(void);
#endif
#if defined(CONFIG_HARDLOCKUP_CHECK_TIMESTAMP) && \
defined(CONFIG_HARDLOCKUP_DETECTOR_PERF)
void watchdog_update_hrtimer_threshold(u64 period);
#else
static inline void watchdog_update_hrtimer_threshold(u64 period) { }
#endif
#ifdef CONFIG_HAVE_ACPI_APEI_NMI
#include <asm/nmi.h>
#endif
#ifdef CONFIG_NMI_CHECK_CPU
void nmi_backtrace_stall_snap(const struct cpumask *btp);
void nmi_backtrace_stall_check(const struct cpumask *btp);
#else
static inline void nmi_backtrace_stall_snap(const struct cpumask *btp) {}
static inline void nmi_backtrace_stall_check(const struct cpumask *btp) {}
#endif
#endif