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Commit | Line | Data |
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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); | |
7270d11c TG |
16 | /* Should be core only, but ARM BL switcher requires it */ |
17 | extern void tick_suspend_local(void); | |
18 | /* Should be core only, but XEN resume magic and ARM BL switcher require it */ | |
f46481d0 | 19 | extern void tick_resume_local(void); |
52c063d1 | 20 | extern void tick_handover_do_timer(void); |
a49b116d | 21 | extern void tick_cleanup_dead_cpu(int cpu); |
c1797baf TG |
22 | #else /* CONFIG_GENERIC_CLOCKEVENTS */ |
23 | static inline void tick_init(void) { } | |
7270d11c | 24 | static inline void tick_suspend_local(void) { } |
f46481d0 | 25 | static inline void tick_resume_local(void) { } |
52c063d1 | 26 | static inline void tick_handover_do_timer(void) { } |
a49b116d | 27 | static inline void tick_cleanup_dead_cpu(int cpu) { } |
c1797baf | 28 | #endif /* !CONFIG_GENERIC_CLOCKEVENTS */ |
124cf911 | 29 | |
87e9b9f1 RW |
30 | #if defined(CONFIG_GENERIC_CLOCKEVENTS) && defined(CONFIG_SUSPEND) |
31 | extern void tick_freeze(void); | |
32 | extern void tick_unfreeze(void); | |
33 | #else | |
34 | static inline void tick_freeze(void) { } | |
35 | static inline void tick_unfreeze(void) { } | |
36 | #endif | |
37 | ||
c1797baf | 38 | #ifdef CONFIG_TICK_ONESHOT |
5acac1be | 39 | extern void tick_irq_enter(void); |
3c5d92a0 | 40 | # ifndef arch_needs_cpu |
fe0f4976 | 41 | # define arch_needs_cpu() (0) |
3c5d92a0 | 42 | # endif |
79bf2bb3 | 43 | # else |
5acac1be | 44 | static inline void tick_irq_enter(void) { } |
c1797baf | 45 | #endif |
33a5f626 | 46 | |
345527b1 PM |
47 | #if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT) |
48 | extern void hotplug_cpu__broadcast_tick_pull(int dead_cpu); | |
49 | #else | |
50 | static inline void hotplug_cpu__broadcast_tick_pull(int dead_cpu) { } | |
51 | #endif | |
52 | ||
592a438f TG |
53 | enum tick_broadcast_mode { |
54 | TICK_BROADCAST_OFF, | |
55 | TICK_BROADCAST_ON, | |
56 | TICK_BROADCAST_FORCE, | |
57 | }; | |
58 | ||
1fe5d5c3 TG |
59 | enum tick_broadcast_state { |
60 | TICK_BROADCAST_EXIT, | |
61 | TICK_BROADCAST_ENTER, | |
62 | }; | |
63 | ||
592a438f TG |
64 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST |
65 | extern void tick_broadcast_control(enum tick_broadcast_mode mode); | |
66 | #else | |
67 | static inline void tick_broadcast_control(enum tick_broadcast_mode mode) { } | |
68 | #endif /* BROADCAST */ | |
69 | ||
37b64a42 | 70 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
1fe5d5c3 | 71 | extern int tick_broadcast_oneshot_control(enum tick_broadcast_state state); |
37b64a42 TG |
72 | #else |
73 | static inline int tick_broadcast_oneshot_control(enum tick_broadcast_state state) | |
74 | { | |
75 | return 0; | |
76 | } | |
77 | #endif | |
1fe5d5c3 | 78 | |
592a438f TG |
79 | static inline void tick_broadcast_enable(void) |
80 | { | |
81 | tick_broadcast_control(TICK_BROADCAST_ON); | |
82 | } | |
83 | static inline void tick_broadcast_disable(void) | |
84 | { | |
85 | tick_broadcast_control(TICK_BROADCAST_OFF); | |
86 | } | |
87 | static inline void tick_broadcast_force(void) | |
88 | { | |
89 | tick_broadcast_control(TICK_BROADCAST_FORCE); | |
90 | } | |
1fe5d5c3 TG |
91 | static inline int tick_broadcast_enter(void) |
92 | { | |
93 | return tick_broadcast_oneshot_control(TICK_BROADCAST_ENTER); | |
94 | } | |
95 | static inline void tick_broadcast_exit(void) | |
96 | { | |
97 | tick_broadcast_oneshot_control(TICK_BROADCAST_EXIT); | |
98 | } | |
592a438f | 99 | |
c1797baf TG |
100 | #ifdef CONFIG_NO_HZ_COMMON |
101 | extern int tick_nohz_tick_stopped(void); | |
1268fbc7 | 102 | extern void tick_nohz_idle_enter(void); |
280f0677 FW |
103 | extern void tick_nohz_idle_exit(void); |
104 | extern void tick_nohz_irq_exit(void); | |
4f86d3a8 | 105 | extern ktime_t tick_nohz_get_sleep_length(void); |
6378ddb5 | 106 | extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time); |
0224cf4c | 107 | extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time); |
c1797baf TG |
108 | #else /* !CONFIG_NO_HZ_COMMON */ |
109 | static inline int tick_nohz_tick_stopped(void) { return 0; } | |
2bbb6817 FW |
110 | static inline void tick_nohz_idle_enter(void) { } |
111 | static inline void tick_nohz_idle_exit(void) { } | |
280f0677 | 112 | |
4f86d3a8 LB |
113 | static inline ktime_t tick_nohz_get_sleep_length(void) |
114 | { | |
115 | ktime_t len = { .tv64 = NSEC_PER_SEC/HZ }; | |
116 | ||
117 | return len; | |
118 | } | |
8083e4ad | 119 | static inline u64 get_cpu_idle_time_us(int cpu, u64 *unused) { return -1; } |
0224cf4c | 120 | static inline u64 get_cpu_iowait_time_us(int cpu, u64 *unused) { return -1; } |
c1797baf | 121 | #endif /* !CONFIG_NO_HZ_COMMON */ |
906568c9 | 122 | |
c5bfece2 | 123 | #ifdef CONFIG_NO_HZ_FULL |
460775df FW |
124 | extern bool tick_nohz_full_running; |
125 | extern cpumask_var_t tick_nohz_full_mask; | |
c0f489d2 | 126 | extern cpumask_var_t housekeeping_mask; |
460775df FW |
127 | |
128 | static inline bool tick_nohz_full_enabled(void) | |
129 | { | |
58135f57 | 130 | if (!context_tracking_is_enabled()) |
460775df FW |
131 | return false; |
132 | ||
133 | return tick_nohz_full_running; | |
134 | } | |
135 | ||
136 | static inline bool tick_nohz_full_cpu(int cpu) | |
137 | { | |
138 | if (!tick_nohz_full_enabled()) | |
139 | return false; | |
140 | ||
141 | return cpumask_test_cpu(cpu, tick_nohz_full_mask); | |
142 | } | |
143 | ||
83dedea8 CM |
144 | static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) |
145 | { | |
146 | if (tick_nohz_full_enabled()) | |
147 | cpumask_or(mask, mask, tick_nohz_full_mask); | |
148 | } | |
149 | ||
40bea039 | 150 | extern void tick_nohz_full_kick(void); |
3d36aebc | 151 | extern void tick_nohz_full_kick_cpu(int cpu); |
76c24fb0 | 152 | extern void tick_nohz_full_kick_all(void); |
de734f89 | 153 | extern void __tick_nohz_task_switch(void); |
a831881b | 154 | #else |
460775df FW |
155 | static inline bool tick_nohz_full_enabled(void) { return false; } |
156 | static inline bool tick_nohz_full_cpu(int cpu) { return false; } | |
83dedea8 | 157 | static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) { } |
3d36aebc | 158 | static inline void tick_nohz_full_kick_cpu(int cpu) { } |
76c24fb0 FW |
159 | static inline void tick_nohz_full_kick(void) { } |
160 | static inline void tick_nohz_full_kick_all(void) { } | |
de734f89 | 161 | static inline void __tick_nohz_task_switch(void) { } |
a831881b FW |
162 | #endif |
163 | ||
03f6199a CM |
164 | static inline const struct cpumask *housekeeping_cpumask(void) |
165 | { | |
166 | #ifdef CONFIG_NO_HZ_FULL | |
167 | if (tick_nohz_full_enabled()) | |
168 | return housekeeping_mask; | |
169 | #endif | |
170 | return cpu_possible_mask; | |
171 | } | |
172 | ||
c0f489d2 PM |
173 | static inline bool is_housekeeping_cpu(int cpu) |
174 | { | |
175 | #ifdef CONFIG_NO_HZ_FULL | |
176 | if (tick_nohz_full_enabled()) | |
177 | return cpumask_test_cpu(cpu, housekeeping_mask); | |
178 | #endif | |
179 | return true; | |
180 | } | |
181 | ||
182 | static inline void housekeeping_affine(struct task_struct *t) | |
183 | { | |
184 | #ifdef CONFIG_NO_HZ_FULL | |
185 | if (tick_nohz_full_enabled()) | |
186 | set_cpus_allowed_ptr(t, housekeeping_mask); | |
187 | ||
188 | #endif | |
189 | } | |
190 | ||
de734f89 | 191 | static inline void tick_nohz_task_switch(void) |
d13508f9 FW |
192 | { |
193 | if (tick_nohz_full_enabled()) | |
de734f89 | 194 | __tick_nohz_task_switch(); |
d13508f9 FW |
195 | } |
196 | ||
906568c9 | 197 | #endif |