0 ˆÁÀ ƒxN5¿Äà H/* SPDX-License-Identifier: GPL-2.0 */ /* * include/linux/irqflags.h * * IRQ flags tracing: follow the state of the hardirq and softirq flags and * provide callbacks for transitions between ON and OFF states. * * This file gets included from lowlevel asm headers too, to provide * wrapped versions of the local_irq_*() APIs, based on the * raw_local_irq_*() macros from the lowlevel headers. */ #ifndef _LINUX_TRACE_IRQFLAGS_H #define _LINUX_TRACE_IRQFLAGS_H #include #include #include #include /* Currently lockdep_softirqs_on/off is used only by lockdep */ #ifdef CONFIG_PROVE_LOCKING extern void lockdep_softirqs_on(unsigned long ip); extern void lockdep_softirqs_off(unsigned long ip); extern void lockdep_hardirqs_on_prepare(void); extern void lockdep_hardirqs_on(unsigned long ip); extern void lockdep_hardirqs_off(unsigned long ip); #else static inline void lockdep_softirqs_on(unsigned long ip) { } static inline void lockdep_softirqs_off(unsigned long ip) { } static inline void lockdep_hardirqs_on_prepare(void) { } static inline void lockdep_hardirqs_on(unsigned long ip) { } static inline void lockdep_hardirqs_off(unsigned long ip) { } #endif #ifdef CONFIG_TRACE_IRQFLAGS /* Per-task IRQ trace events information. */ struct irqtrace_events { unsigned int irq_events; unsigned long hardirq_enable_ip; unsigned long hardirq_disable_ip; unsigned int hardirq_enable_event; unsigned int hardirq_disable_event; unsigned long softirq_disable_ip; unsigned long softirq_enable_ip; unsigned int softirq_disable_event; unsigned int softirq_enable_event; }; DECLARE_PER_CPU(int, hardirqs_enabled); DECLARE_PER_CPU(int, hardirq_context); extern void trace_hardirqs_on_prepare(void); extern void trace_hardirqs_off_finish(void); extern void trace_hardirqs_on(void); extern void trace_hardirqs_off(void); # define lockdep_hardirq_context() (raw_cpu_read(hardirq_context)) # define lockdep_softirq_context(p) ((p)->softirq_context) # define lockdep_hardirqs_enabled() (this_cpu_read(hardirqs_enabled)) # define lockdep_softirqs_enabled(p) ((p)->softirqs_enabled) # define lockdep_hardirq_enter() \ do { \ if (__this_cpu_inc_return(hardirq_context) == 1)\ current->hardirq_threaded = 0; \ } while (0) # define lockdep_hardirq_threaded() \ do { \ current->hardirq_threaded = 1; \ } while (0) # define lockdep_hardirq_exit() \ do { \ __this_cpu_dec(hardirq_context); \ } while (0) # define lockdep_hrtimer_enter(__hrtimer) \ ({ \ bool __expires_hardirq = true; \ \ if (!__hrtimer->is_hard) { \ current->irq_config = 1; \ __expires_hardirq = false; \ } \ __expires_hardirq; \ }) # define lockdep_hrtimer_exit(__expires_hardirq) \ do { \ if (!__expires_hardirq) \ current->irq_config = 0; \ } while (0) # define lockdep_posixtimer_enter() \ do { \ current->irq_config = 1; \ } while (0) # define lockdep_posixtimer_exit() \ do { \ current->irq_config = 0; \ } while (0) # define lockdep_irq_work_enter(_flags) \ do { \ if (!((_flags) & IRQ_WORK_HARD_IRQ)) \ current->irq_config = 1; \ } while (0) # define lockdep_irq_work_exit(_flags) \ do { \ if (!((_flags) & IRQ_WORK_HARD_IRQ)) \ current->irq_config = 0; \ } while (0) #else # define trace_hardirqs_on_prepare() do { } while (0) # define trace_hardirqs_off_finish() do { } while (0) # define trace_hardirqs_on() do { } while (0) # define trace_hardirqs_off() do { } while (0) # define lockdep_hardirq_context() 0 # define lockdep_softirq_context(p) 0 # define lockdep_hardirqs_enabled() 0 # define lockdep_softirqs_enabled(p) 0 # define lockdep_hardirq_enter() do { } while (0) # define lockdep_hardirq_threaded() do { } while (0) # define lockdep_hardirq_exit() do { } while (0) # define lockdep_softirq_enter() do { } while (0) # define lockdep_softirq_exit() do { } while (0) # define lockdep_hrtimer_