/* SPDX-License-Identifier: GPL-2.0 */#ifndef _TICK_SCHED_H#define _TICK_SCHED_H #include <linux/hrtimer.h> enum tick_device_mode {	TICKDEV_MODE_PERIODIC,	TICKDEV_MODE_ONESHOT,}; struct tick_device {	struct clock_event_device *evtdev;	enum tick_device_mode mode;}; /* The CPU is in the tick idle mode */#define TS_FLAG_INIDLE		BIT(0)/* The idle tick has been stopped */#define TS_FLAG_STOPPED		BIT(1)/* * Indicator that the CPU is actively in the tick idle mode; * it is reset during irq handling phases. */#define TS_FLAG_IDLE_ACTIVE	BIT(2)/* CPU was the last one doing do_timer before going idle */#define TS_FLAG_DO_TIMER_LAST	BIT(3)/* NO_HZ is enabled */#define TS_FLAG_NOHZ		BIT(4)/* High resolution tick mode */#define TS_FLAG_HIGHRES		BIT(5) /** * struct tick_sched - sched tick emulation and no idle tick control/stats * * @flags:		State flags gathering the TS_FLAG_* features * @got_idle_tick:	Tick timer function has run with @inidle set * @stalled_jiffies:	Number of stalled jiffies detected across ticks * @last_tick_jiffies:	Value of jiffies seen on last tick * @sched_timer:	hrtimer to schedule the periodic tick in high *			resolution mode * @last_tick:		Store the last tick expiry time when the tick *			timer is modified for nohz sleeps. This is necessary *			to resume the tick timer operation in the timeline *			when the CPU returns from nohz sleep. * @next_tick:		Next tick to be fired when in dynticks mode. * @idle_waketime:	Time when the idle was interrupted * @idle_entrytime:	Time when the idle call was entered * @last_jiffies:	Base jiffies snapshot when next event was last computed * @timer_expires_base:	Base time clock monotonic for @timer_expires * @timer_expires:	Anticipated timer expiration time (in case sched tick is stopped) * @next_timer:		Expiry time of next expiring timer for debugging purpose only * @idle_expires:	Next tick in idle, for debugging purpose only * @idle_calls:		Total number of idle calls * @idle_sleeps:	Number of idle calls, where the sched tick was stopped * @tick_dep_mask:	Tick dependency mask - is set, if someone needs the tick * @check_clocks:	Notification mechanism about clocksource changes */struct tick_sched {	/* Common flags */	unsigned long			flags; 	/* Tick handling: jiffies stall check */	unsigned int			stalled_jiffies;	unsigned long			last_tick_jiffies; 	/* Tick handling */	struct hrtimer			sched_timer;	ktime_t				last_tick;	ktime_t				next_tick;	ktime_t				idle_waketime;	unsigned int			got_idle_tick; 	/* Idle entry */	ktime_t				idle_entrytime; 	/* Tick stop */	unsigned long			last_jiffies;	u64				timer_expires_base;	u64				timer_expires;	u64				next_timer;	ktime_t				idle_expires;	unsigned long			idle_calls;	unsigned long			idle_sleeps; 	/* Full dynticks handling */	atomic_t			tick_dep_mask; 	/* Clocksource changes */	unsigned long			check_clocks;}; extern struct tick_sched *tick_get_tick_sched(int cpu); extern void tick_setup_sched_timer(bool hrtimer);#if defined CONFIG_TICK_ONESHOTextern void tick_sched_timer_dying(int cpu);#elsestatic inline void tick_sched_timer_dying(int cpu) { }#endif #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCASTextern int __tick_broadcast_oneshot_control(enum tick_broadcast_state state);#elsestatic inline int__tick_broadcast_oneshot_control(enum tick_broadcast_state state){	return -EBUSY;}#endif #endif