Commit | Line | Data |
---|---|---|
c1797baf TG |
1 | /* |
2 | * Tick related global functions | |
906568c9 TG |
3 | */ |
4 | #ifndef _LINUX_TICK_H | |
5 | #define _LINUX_TICK_H | |
6 | ||
7 | #include <linux/clockchips.h> | |
2bbb6817 | 8 | #include <linux/irqflags.h> |
33a5f626 | 9 | #include <linux/percpu.h> |
460775df FW |
10 | #include <linux/context_tracking_state.h> |
11 | #include <linux/cpumask.h> | |
c0f489d2 | 12 | #include <linux/sched.h> |
906568c9 | 13 | |
c1797baf TG |
14 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
15 | extern void __init tick_init(void); | |
124cf911 RW |
16 | extern void tick_freeze(void); |
17 | extern void tick_unfreeze(void); | |
7270d11c TG |
18 | /* Should be core only, but ARM BL switcher requires it */ |
19 | extern void tick_suspend_local(void); | |
20 | /* Should be core only, but XEN resume magic and ARM BL switcher require it */ | |
f46481d0 | 21 | extern void tick_resume_local(void); |
c1797baf TG |
22 | #else /* CONFIG_GENERIC_CLOCKEVENTS */ |
23 | static inline void tick_init(void) { } | |
24 | static inline void tick_freeze(void) { } | |
25 | static inline void tick_unfreeze(void) { } | |
7270d11c | 26 | static inline void tick_suspend_local(void) { } |
f46481d0 | 27 | static inline void tick_resume_local(void) { } |
c1797baf | 28 | #endif /* !CONFIG_GENERIC_CLOCKEVENTS */ |
124cf911 | 29 | |
c1797baf | 30 | #ifdef CONFIG_TICK_ONESHOT |
5acac1be | 31 | extern void tick_irq_enter(void); |
3c5d92a0 | 32 | # ifndef arch_needs_cpu |
fe0f4976 | 33 | # define arch_needs_cpu() (0) |
3c5d92a0 | 34 | # endif |
79bf2bb3 | 35 | # else |
5acac1be | 36 | static inline void tick_irq_enter(void) { } |
c1797baf | 37 | #endif |
33a5f626 | 38 | |
345527b1 PM |
39 | #if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT) |
40 | extern void hotplug_cpu__broadcast_tick_pull(int dead_cpu); | |
41 | #else | |
42 | static inline void hotplug_cpu__broadcast_tick_pull(int dead_cpu) { } | |
43 | #endif | |
44 | ||
592a438f TG |
45 | enum tick_broadcast_mode { |
46 | TICK_BROADCAST_OFF, | |
47 | TICK_BROADCAST_ON, | |
48 | TICK_BROADCAST_FORCE, | |
49 | }; | |
50 | ||
51 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST | |
52 | extern void tick_broadcast_control(enum tick_broadcast_mode mode); | |
53 | #else | |
54 | static inline void tick_broadcast_control(enum tick_broadcast_mode mode) { } | |
55 | #endif /* BROADCAST */ | |
56 | ||
57 | static inline void tick_broadcast_enable(void) | |
58 | { | |
59 | tick_broadcast_control(TICK_BROADCAST_ON); | |
60 | } | |
61 | static inline void tick_broadcast_disable(void) | |
62 | { | |
63 | tick_broadcast_control(TICK_BROADCAST_OFF); | |
64 | } | |
65 | static inline void tick_broadcast_force(void) | |
66 | { | |
67 | tick_broadcast_control(TICK_BROADCAST_FORCE); | |
68 | } | |
69 | ||
c1797baf TG |
70 | #ifdef CONFIG_NO_HZ_COMMON |
71 | extern int tick_nohz_tick_stopped(void); | |
1268fbc7 | 72 | extern void tick_nohz_idle_enter(void); |
280f0677 FW |
73 | extern void tick_nohz_idle_exit(void); |
74 | extern void tick_nohz_irq_exit(void); | |
4f86d3a8 | 75 | extern ktime_t tick_nohz_get_sleep_length(void); |
6378ddb5 | 76 | extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time); |
0224cf4c | 77 | extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time); |
c1797baf TG |
78 | #else /* !CONFIG_NO_HZ_COMMON */ |
79 | static inline int tick_nohz_tick_stopped(void) { return 0; } | |
2bbb6817 FW |
80 | static inline void tick_nohz_idle_enter(void) { } |
81 | static inline void tick_nohz_idle_exit(void) { } | |
280f0677 | 82 | |
4f86d3a8 LB |
83 | static inline ktime_t tick_nohz_get_sleep_length(void) |
84 | { | |
85 | ktime_t len = { .tv64 = NSEC_PER_SEC/HZ }; | |
86 | ||
87 | return len; | |
88 | } | |
8083e4ad | 89 | static inline u64 get_cpu_idle_time_us(int cpu, u64 *unused) { return -1; } |
0224cf4c | 90 | static inline u64 get_cpu_iowait_time_us(int cpu, u64 *unused) { return -1; } |
c1797baf | 91 | #endif /* !CONFIG_NO_HZ_COMMON */ |
906568c9 | 92 | |
c5bfece2 | 93 | #ifdef CONFIG_NO_HZ_FULL |
460775df FW |
94 | extern bool tick_nohz_full_running; |
95 | extern cpumask_var_t tick_nohz_full_mask; | |
c0f489d2 | 96 | extern cpumask_var_t housekeeping_mask; |
460775df FW |
97 | |
98 | static inline bool tick_nohz_full_enabled(void) | |
99 | { | |
58135f57 | 100 | if (!context_tracking_is_enabled()) |
460775df FW |
101 | return false; |
102 | ||
103 | return tick_nohz_full_running; | |
104 | } | |
105 | ||
106 | static inline bool tick_nohz_full_cpu(int cpu) | |
107 | { | |
108 | if (!tick_nohz_full_enabled()) | |
109 | return false; | |
110 | ||
111 | return cpumask_test_cpu(cpu, tick_nohz_full_mask); | |
112 | } | |
113 | ||
d13508f9 | 114 | extern void __tick_nohz_full_check(void); |
40bea039 | 115 | extern void tick_nohz_full_kick(void); |
3d36aebc | 116 | extern void tick_nohz_full_kick_cpu(int cpu); |
76c24fb0 | 117 | extern void tick_nohz_full_kick_all(void); |
d13508f9 | 118 | extern void __tick_nohz_task_switch(struct task_struct *tsk); |
a831881b | 119 | #else |
460775df FW |
120 | static inline bool tick_nohz_full_enabled(void) { return false; } |
121 | static inline bool tick_nohz_full_cpu(int cpu) { return false; } | |
d13508f9 | 122 | static inline void __tick_nohz_full_check(void) { } |
3d36aebc | 123 | static inline void tick_nohz_full_kick_cpu(int cpu) { } |
76c24fb0 FW |
124 | static inline void tick_nohz_full_kick(void) { } |
125 | static inline void tick_nohz_full_kick_all(void) { } | |
d13508f9 | 126 | static inline void __tick_nohz_task_switch(struct task_struct *tsk) { } |
a831881b FW |
127 | #endif |
128 | ||
c0f489d2 PM |
129 | static inline bool is_housekeeping_cpu(int cpu) |
130 | { | |
131 | #ifdef CONFIG_NO_HZ_FULL | |
132 | if (tick_nohz_full_enabled()) | |
133 | return cpumask_test_cpu(cpu, housekeeping_mask); | |
134 | #endif | |
135 | return true; | |
136 | } | |
137 | ||
138 | static inline void housekeeping_affine(struct task_struct *t) | |
139 | { | |
140 | #ifdef CONFIG_NO_HZ_FULL | |
141 | if (tick_nohz_full_enabled()) | |
142 | set_cpus_allowed_ptr(t, housekeeping_mask); | |
143 | ||
144 | #endif | |
145 | } | |
146 | ||
d13508f9 FW |
147 | static inline void tick_nohz_full_check(void) |
148 | { | |
149 | if (tick_nohz_full_enabled()) | |
150 | __tick_nohz_full_check(); | |
151 | } | |
152 | ||
153 | static inline void tick_nohz_task_switch(struct task_struct *tsk) | |
154 | { | |
155 | if (tick_nohz_full_enabled()) | |
156 | __tick_nohz_task_switch(tsk); | |
157 | } | |
158 | ||
906568c9 | 159 | #endif |