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); | |
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 | 100 | #ifdef CONFIG_NO_HZ_COMMON |
46373a15 | 101 | extern int tick_nohz_enabled; |
c1797baf | 102 | extern int tick_nohz_tick_stopped(void); |
1268fbc7 | 103 | extern void tick_nohz_idle_enter(void); |
280f0677 FW |
104 | extern void tick_nohz_idle_exit(void); |
105 | extern void tick_nohz_irq_exit(void); | |
4f86d3a8 | 106 | extern ktime_t tick_nohz_get_sleep_length(void); |
6378ddb5 | 107 | extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time); |
0224cf4c | 108 | extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time); |
c1797baf | 109 | #else /* !CONFIG_NO_HZ_COMMON */ |
46373a15 | 110 | #define tick_nohz_enabled (0) |
c1797baf | 111 | static inline int tick_nohz_tick_stopped(void) { return 0; } |
2bbb6817 FW |
112 | static inline void tick_nohz_idle_enter(void) { } |
113 | static inline void tick_nohz_idle_exit(void) { } | |
280f0677 | 114 | |
4f86d3a8 LB |
115 | static inline ktime_t tick_nohz_get_sleep_length(void) |
116 | { | |
117 | ktime_t len = { .tv64 = NSEC_PER_SEC/HZ }; | |
118 | ||
119 | return len; | |
120 | } | |
8083e4ad | 121 | static inline u64 get_cpu_idle_time_us(int cpu, u64 *unused) { return -1; } |
0224cf4c | 122 | static inline u64 get_cpu_iowait_time_us(int cpu, u64 *unused) { return -1; } |
c1797baf | 123 | #endif /* !CONFIG_NO_HZ_COMMON */ |
906568c9 | 124 | |
c5bfece2 | 125 | #ifdef CONFIG_NO_HZ_FULL |
460775df FW |
126 | extern bool tick_nohz_full_running; |
127 | extern cpumask_var_t tick_nohz_full_mask; | |
c0f489d2 | 128 | extern cpumask_var_t housekeeping_mask; |
460775df FW |
129 | |
130 | static inline bool tick_nohz_full_enabled(void) | |
131 | { | |
58135f57 | 132 | if (!context_tracking_is_enabled()) |
460775df FW |
133 | return false; |
134 | ||
135 | return tick_nohz_full_running; | |
136 | } | |
137 | ||
138 | static inline bool tick_nohz_full_cpu(int cpu) | |
139 | { | |
140 | if (!tick_nohz_full_enabled()) | |
141 | return false; | |
142 | ||
143 | return cpumask_test_cpu(cpu, tick_nohz_full_mask); | |
144 | } | |
145 | ||
83dedea8 CM |
146 | static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) |
147 | { | |
148 | if (tick_nohz_full_enabled()) | |
149 | cpumask_or(mask, mask, tick_nohz_full_mask); | |
150 | } | |
151 | ||
9642d18e VH |
152 | static inline int housekeeping_any_cpu(void) |
153 | { | |
154 | return cpumask_any_and(housekeeping_mask, cpu_online_mask); | |
155 | } | |
156 | ||
40bea039 | 157 | extern void tick_nohz_full_kick(void); |
3d36aebc | 158 | extern void tick_nohz_full_kick_cpu(int cpu); |
76c24fb0 | 159 | extern void tick_nohz_full_kick_all(void); |
de734f89 | 160 | extern void __tick_nohz_task_switch(void); |
a831881b | 161 | #else |
9642d18e VH |
162 | static inline int housekeeping_any_cpu(void) |
163 | { | |
164 | return smp_processor_id(); | |
165 | } | |
460775df FW |
166 | static inline bool tick_nohz_full_enabled(void) { return false; } |
167 | static inline bool tick_nohz_full_cpu(int cpu) { return false; } | |
83dedea8 | 168 | static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) { } |
3d36aebc | 169 | static inline void tick_nohz_full_kick_cpu(int cpu) { } |
76c24fb0 FW |
170 | static inline void tick_nohz_full_kick(void) { } |
171 | static inline void tick_nohz_full_kick_all(void) { } | |
de734f89 | 172 | static inline void __tick_nohz_task_switch(void) { } |
a831881b FW |
173 | #endif |
174 | ||
03f6199a CM |
175 | static inline const struct cpumask *housekeeping_cpumask(void) |
176 | { | |
177 | #ifdef CONFIG_NO_HZ_FULL | |
178 | if (tick_nohz_full_enabled()) | |
179 | return housekeeping_mask; | |
180 | #endif | |
181 | return cpu_possible_mask; | |
182 | } | |
183 | ||
c0f489d2 PM |
184 | static inline bool is_housekeeping_cpu(int cpu) |
185 | { | |
186 | #ifdef CONFIG_NO_HZ_FULL | |
187 | if (tick_nohz_full_enabled()) | |
188 | return cpumask_test_cpu(cpu, housekeeping_mask); | |
189 | #endif | |
190 | return true; | |
191 | } | |
192 | ||
193 | static inline void housekeeping_affine(struct task_struct *t) | |
194 | { | |
195 | #ifdef CONFIG_NO_HZ_FULL | |
196 | if (tick_nohz_full_enabled()) | |
197 | set_cpus_allowed_ptr(t, housekeeping_mask); | |
198 | ||
199 | #endif | |
200 | } | |
201 | ||
de734f89 | 202 | static inline void tick_nohz_task_switch(void) |
d13508f9 FW |
203 | { |
204 | if (tick_nohz_full_enabled()) | |
de734f89 | 205 | __tick_nohz_task_switch(); |
d13508f9 FW |
206 | } |
207 | ||
906568c9 | 208 | #endif |