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-rw-r--r--kernel/time/tick-internal.h211
1 files changed, 89 insertions, 122 deletions
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h
index 366aeb4f2c66..b64fdd8054c5 100644
--- a/kernel/time/tick-internal.h
+++ b/kernel/time/tick-internal.h
@@ -5,15 +5,12 @@
5#include <linux/tick.h> 5#include <linux/tick.h>
6 6
7#include "timekeeping.h" 7#include "timekeeping.h"
8#include "tick-sched.h"
8 9
9extern seqlock_t jiffies_lock; 10#ifdef CONFIG_GENERIC_CLOCKEVENTS
10 11
11#define CS_NAME_LEN 32 12# define TICK_DO_TIMER_NONE -1
12 13# define TICK_DO_TIMER_BOOT -2
13#ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD
14
15#define TICK_DO_TIMER_NONE -1
16#define TICK_DO_TIMER_BOOT -2
17 14
18DECLARE_PER_CPU(struct tick_device, tick_cpu_device); 15DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
19extern ktime_t tick_next_period; 16extern ktime_t tick_next_period;
@@ -23,21 +20,72 @@ extern int tick_do_timer_cpu __read_mostly;
23extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); 20extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast);
24extern void tick_handle_periodic(struct clock_event_device *dev); 21extern void tick_handle_periodic(struct clock_event_device *dev);
25extern void tick_check_new_device(struct clock_event_device *dev); 22extern void tick_check_new_device(struct clock_event_device *dev);
26extern void tick_handover_do_timer(int *cpup); 23extern void tick_shutdown(unsigned int cpu);
27extern void tick_shutdown(unsigned int *cpup);
28extern void tick_suspend(void); 24extern void tick_suspend(void);
29extern void tick_resume(void); 25extern void tick_resume(void);
30extern bool tick_check_replacement(struct clock_event_device *curdev, 26extern bool tick_check_replacement(struct clock_event_device *curdev,
31 struct clock_event_device *newdev); 27 struct clock_event_device *newdev);
32extern void tick_install_replacement(struct clock_event_device *dev); 28extern void tick_install_replacement(struct clock_event_device *dev);
29extern int tick_is_oneshot_available(void);
30extern struct tick_device *tick_get_device(int cpu);
33 31
34extern void clockevents_shutdown(struct clock_event_device *dev); 32extern int clockevents_tick_resume(struct clock_event_device *dev);
33/* Check, if the device is functional or a dummy for broadcast */
34static inline int tick_device_is_functional(struct clock_event_device *dev)
35{
36 return !(dev->features & CLOCK_EVT_FEAT_DUMMY);
37}
35 38
39extern void clockevents_shutdown(struct clock_event_device *dev);
40extern void clockevents_exchange_device(struct clock_event_device *old,
41 struct clock_event_device *new);
42extern void clockevents_set_state(struct clock_event_device *dev,
43 enum clock_event_state state);
44extern int clockevents_program_event(struct clock_event_device *dev,
45 ktime_t expires, bool force);
46extern void clockevents_handle_noop(struct clock_event_device *dev);
47extern int __clockevents_update_freq(struct clock_event_device *dev, u32 freq);
36extern ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt); 48extern ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt);
37 49
38/* 50/* Broadcasting support */
39 * NO_HZ / high resolution timer shared code 51# ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
40 */ 52extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu);
53extern void tick_install_broadcast_device(struct clock_event_device *dev);
54extern int tick_is_broadcast_device(struct clock_event_device *dev);
55extern void tick_shutdown_broadcast(unsigned int cpu);
56extern void tick_suspend_broadcast(void);
57extern void tick_resume_broadcast(void);
58extern bool tick_resume_check_broadcast(void);
59extern void tick_broadcast_init(void);
60extern void tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
61extern int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq);
62extern struct tick_device *tick_get_broadcast_device(void);
63extern struct cpumask *tick_get_broadcast_mask(void);
64# else /* !CONFIG_GENERIC_CLOCKEVENTS_BROADCAST: */
65static inline void tick_install_broadcast_device(struct clock_event_device *dev) { }
66static inline int tick_is_broadcast_device(struct clock_event_device *dev) { return 0; }
67static inline int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu) { return 0; }
68static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { }
69static inline void tick_shutdown_broadcast(unsigned int cpu) { }
70static inline void tick_suspend_broadcast(void) { }
71static inline void tick_resume_broadcast(void) { }
72static inline bool tick_resume_check_broadcast(void) { return false; }
73static inline void tick_broadcast_init(void) { }
74static inline int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq) { return -ENODEV; }
75
76/* Set the periodic handler in non broadcast mode */
77static inline void tick_set_periodic_handler(struct clock_event_device *dev, int broadcast)
78{
79 dev->event_handler = tick_handle_periodic;
80}
81# endif /* !CONFIG_GENERIC_CLOCKEVENTS_BROADCAST */
82
83#else /* !GENERIC_CLOCKEVENTS: */
84static inline void tick_suspend(void) { }
85static inline void tick_resume(void) { }
86#endif /* !GENERIC_CLOCKEVENTS */
87
88/* Oneshot related functions */
41#ifdef CONFIG_TICK_ONESHOT 89#ifdef CONFIG_TICK_ONESHOT
42extern void tick_setup_oneshot(struct clock_event_device *newdev, 90extern void tick_setup_oneshot(struct clock_event_device *newdev,
43 void (*handler)(struct clock_event_device *), 91 void (*handler)(struct clock_event_device *),
@@ -46,58 +94,42 @@ extern int tick_program_event(ktime_t expires, int force);
46extern void tick_oneshot_notify(void); 94extern void tick_oneshot_notify(void);
47extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); 95extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *));
48extern void tick_resume_oneshot(void); 96extern void tick_resume_oneshot(void);
49# ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST 97static inline bool tick_oneshot_possible(void) { return true; }
98extern int tick_oneshot_mode_active(void);
99extern void tick_clock_notify(void);
100extern int tick_check_oneshot_change(int allow_nohz);
101extern int tick_init_highres(void);
102#else /* !CONFIG_TICK_ONESHOT: */
103static inline
104void tick_setup_oneshot(struct clock_event_device *newdev,
105 void (*handler)(struct clock_event_device *),
106 ktime_t nextevt) { BUG(); }
107static inline void tick_resume_oneshot(void) { BUG(); }
108static inline int tick_program_event(ktime_t expires, int force) { return 0; }
109static inline void tick_oneshot_notify(void) { }
110static inline bool tick_oneshot_possible(void) { return false; }
111static inline int tick_oneshot_mode_active(void) { return 0; }
112static inline void tick_clock_notify(void) { }
113static inline int tick_check_oneshot_change(int allow_nohz) { return 0; }
114#endif /* !CONFIG_TICK_ONESHOT */
115
116/* Functions related to oneshot broadcasting */
117#if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT)
50extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); 118extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc);
51extern int tick_broadcast_oneshot_control(unsigned long reason);
52extern void tick_broadcast_switch_to_oneshot(void); 119extern void tick_broadcast_switch_to_oneshot(void);
53extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup); 120extern void tick_shutdown_broadcast_oneshot(unsigned int cpu);
54extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc);
55extern int tick_broadcast_oneshot_active(void); 121extern int tick_broadcast_oneshot_active(void);
56extern void tick_check_oneshot_broadcast_this_cpu(void); 122extern void tick_check_oneshot_broadcast_this_cpu(void);
57bool tick_broadcast_oneshot_available(void); 123bool tick_broadcast_oneshot_available(void);
58# else /* BROADCAST */ 124extern struct cpumask *tick_get_broadcast_oneshot_mask(void);
59static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 125#else /* !(BROADCAST && ONESHOT): */
60{ 126static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) { BUG(); }
61 BUG();
62}
63static inline int tick_broadcast_oneshot_control(unsigned long reason) { return 0; }
64static inline void tick_broadcast_switch_to_oneshot(void) { } 127static inline void tick_broadcast_switch_to_oneshot(void) { }
65static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 128static inline void tick_shutdown_broadcast_oneshot(unsigned int cpu) { }
66static inline int tick_broadcast_oneshot_active(void) { return 0; } 129static inline int tick_broadcast_oneshot_active(void) { return 0; }
67static inline void tick_check_oneshot_broadcast_this_cpu(void) { } 130static inline void tick_check_oneshot_broadcast_this_cpu(void) { }
68static inline bool tick_broadcast_oneshot_available(void) { return true; } 131static inline bool tick_broadcast_oneshot_available(void) { return tick_oneshot_possible(); }
69# endif /* !BROADCAST */ 132#endif /* !(BROADCAST && ONESHOT) */
70
71#else /* !ONESHOT */
72static inline
73void tick_setup_oneshot(struct clock_event_device *newdev,
74 void (*handler)(struct clock_event_device *),
75 ktime_t nextevt)
76{
77 BUG();
78}
79static inline void tick_resume_oneshot(void)
80{
81 BUG();
82}
83static inline int tick_program_event(ktime_t expires, int force)
84{
85 return 0;
86}
87static inline void tick_oneshot_notify(void) { }
88static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
89{
90 BUG();
91}
92static inline int tick_broadcast_oneshot_control(unsigned long reason) { return 0; }
93static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
94static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
95{
96 return 0;
97}
98static inline int tick_broadcast_oneshot_active(void) { return 0; }
99static inline bool tick_broadcast_oneshot_available(void) { return false; }
100#endif /* !TICK_ONESHOT */
101 133
102/* NO_HZ_FULL internal */ 134/* NO_HZ_FULL internal */
103#ifdef CONFIG_NO_HZ_FULL 135#ifdef CONFIG_NO_HZ_FULL
@@ -105,68 +137,3 @@ extern void tick_nohz_init(void);
105# else 137# else
106static inline void tick_nohz_init(void) { } 138static inline void tick_nohz_init(void) { }
107#endif 139#endif
108
109/*
110 * Broadcasting support
111 */
112#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
113extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu);
114extern void tick_install_broadcast_device(struct clock_event_device *dev);
115extern int tick_is_broadcast_device(struct clock_event_device *dev);
116extern void tick_broadcast_on_off(unsigned long reason, int *oncpu);
117extern void tick_shutdown_broadcast(unsigned int *cpup);
118extern void tick_suspend_broadcast(void);
119extern int tick_resume_broadcast(void);
120extern void tick_broadcast_init(void);
121extern void
122tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
123int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq);
124
125#else /* !BROADCAST */
126
127static inline void tick_install_broadcast_device(struct clock_event_device *dev)
128{
129}
130
131static inline int tick_is_broadcast_device(struct clock_event_device *dev)
132{
133 return 0;
134}
135static inline int tick_device_uses_broadcast(struct clock_event_device *dev,
136 int cpu)
137{
138 return 0;
139}
140static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { }
141static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { }
142static inline void tick_shutdown_broadcast(unsigned int *cpup) { }
143static inline void tick_suspend_broadcast(void) { }
144static inline int tick_resume_broadcast(void) { return 0; }
145static inline void tick_broadcast_init(void) { }
146static inline int tick_broadcast_update_freq(struct clock_event_device *dev,
147 u32 freq) { return -ENODEV; }
148
149/*
150 * Set the periodic handler in non broadcast mode
151 */
152static inline void tick_set_periodic_handler(struct clock_event_device *dev,
153 int broadcast)
154{
155 dev->event_handler = tick_handle_periodic;
156}
157#endif /* !BROADCAST */
158
159/*
160 * Check, if the device is functional or a dummy for broadcast
161 */
162static inline int tick_device_is_functional(struct clock_event_device *dev)
163{
164 return !(dev->features & CLOCK_EVT_FEAT_DUMMY);
165}
166
167int __clockevents_update_freq(struct clock_event_device *dev, u32 freq);
168
169#endif
170
171extern void do_timer(unsigned long ticks);
172extern void update_wall_time(void);
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-03 09:04:50 -0500