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