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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
c1797baf TG |
2 | /* |
3 | * Tick related global functions | |
906568c9 TG |
4 | */ |
5 | #ifndef _LINUX_TICK_H | |
6 | #define _LINUX_TICK_H | |
7 | ||
8 | #include <linux/clockchips.h> | |
2bbb6817 | 9 | #include <linux/irqflags.h> |
33a5f626 | 10 | #include <linux/percpu.h> |
460775df FW |
11 | #include <linux/context_tracking_state.h> |
12 | #include <linux/cpumask.h> | |
c0f489d2 | 13 | #include <linux/sched.h> |
906568c9 | 14 | |
c1797baf TG |
15 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
16 | extern void __init tick_init(void); | |
7270d11c TG |
17 | /* Should be core only, but ARM BL switcher requires it */ |
18 | extern void tick_suspend_local(void); | |
19 | /* Should be core only, but XEN resume magic and ARM BL switcher require it */ | |
f46481d0 | 20 | extern void tick_resume_local(void); |
52c063d1 | 21 | extern void tick_handover_do_timer(void); |
a49b116d | 22 | extern void tick_cleanup_dead_cpu(int cpu); |
c1797baf TG |
23 | #else /* CONFIG_GENERIC_CLOCKEVENTS */ |
24 | static inline void tick_init(void) { } | |
7270d11c | 25 | static inline void tick_suspend_local(void) { } |
f46481d0 | 26 | static inline void tick_resume_local(void) { } |
52c063d1 | 27 | static inline void tick_handover_do_timer(void) { } |
a49b116d | 28 | static inline void tick_cleanup_dead_cpu(int cpu) { } |
c1797baf | 29 | #endif /* !CONFIG_GENERIC_CLOCKEVENTS */ |
124cf911 | 30 | |
87e9b9f1 RW |
31 | #if defined(CONFIG_GENERIC_CLOCKEVENTS) && defined(CONFIG_SUSPEND) |
32 | extern void tick_freeze(void); | |
33 | extern void tick_unfreeze(void); | |
34 | #else | |
35 | static inline void tick_freeze(void) { } | |
36 | static inline void tick_unfreeze(void) { } | |
37 | #endif | |
38 | ||
c1797baf | 39 | #ifdef CONFIG_TICK_ONESHOT |
5acac1be | 40 | extern void tick_irq_enter(void); |
3c5d92a0 | 41 | # ifndef arch_needs_cpu |
fe0f4976 | 42 | # define arch_needs_cpu() (0) |
3c5d92a0 | 43 | # endif |
79bf2bb3 | 44 | # else |
5acac1be | 45 | static inline void tick_irq_enter(void) { } |
c1797baf | 46 | #endif |
33a5f626 | 47 | |
345527b1 PM |
48 | #if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT) |
49 | extern void hotplug_cpu__broadcast_tick_pull(int dead_cpu); | |
50 | #else | |
51 | static inline void hotplug_cpu__broadcast_tick_pull(int dead_cpu) { } | |
52 | #endif | |
53 | ||
592a438f TG |
54 | enum tick_broadcast_mode { |
55 | TICK_BROADCAST_OFF, | |
56 | TICK_BROADCAST_ON, | |
57 | TICK_BROADCAST_FORCE, | |
58 | }; | |
59 | ||
1fe5d5c3 TG |
60 | enum tick_broadcast_state { |
61 | TICK_BROADCAST_EXIT, | |
62 | TICK_BROADCAST_ENTER, | |
63 | }; | |
64 | ||
592a438f TG |
65 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST |
66 | extern void tick_broadcast_control(enum tick_broadcast_mode mode); | |
67 | #else | |
68 | static inline void tick_broadcast_control(enum tick_broadcast_mode mode) { } | |
69 | #endif /* BROADCAST */ | |
70 | ||
37b64a42 | 71 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
1fe5d5c3 | 72 | extern int tick_broadcast_oneshot_control(enum tick_broadcast_state state); |
37b64a42 TG |
73 | #else |
74 | static inline int tick_broadcast_oneshot_control(enum tick_broadcast_state state) | |
75 | { | |
76 | return 0; | |
77 | } | |
78 | #endif | |
1fe5d5c3 | 79 | |
592a438f TG |
80 | static inline void tick_broadcast_enable(void) |
81 | { | |
82 | tick_broadcast_control(TICK_BROADCAST_ON); | |
83 | } | |
84 | static inline void tick_broadcast_disable(void) | |
85 | { | |
86 | tick_broadcast_control(TICK_BROADCAST_OFF); | |
87 | } | |
88 | static inline void tick_broadcast_force(void) | |
89 | { | |
90 | tick_broadcast_control(TICK_BROADCAST_FORCE); | |
91 | } | |
1fe5d5c3 TG |
92 | static inline int tick_broadcast_enter(void) |
93 | { | |
94 | return tick_broadcast_oneshot_control(TICK_BROADCAST_ENTER); | |
95 | } | |
96 | static inline void tick_broadcast_exit(void) | |
97 | { | |
98 | tick_broadcast_oneshot_control(TICK_BROADCAST_EXIT); | |
99 | } | |
592a438f | 100 | |
d027d45d FW |
101 | enum tick_dep_bits { |
102 | TICK_DEP_BIT_POSIX_TIMER = 0, | |
103 | TICK_DEP_BIT_PERF_EVENTS = 1, | |
104 | TICK_DEP_BIT_SCHED = 2, | |
105 | TICK_DEP_BIT_CLOCK_UNSTABLE = 3 | |
106 | }; | |
107 | ||
e6e6cc22 | 108 | #define TICK_DEP_MASK_NONE 0 |
d027d45d FW |
109 | #define TICK_DEP_MASK_POSIX_TIMER (1 << TICK_DEP_BIT_POSIX_TIMER) |
110 | #define TICK_DEP_MASK_PERF_EVENTS (1 << TICK_DEP_BIT_PERF_EVENTS) | |
111 | #define TICK_DEP_MASK_SCHED (1 << TICK_DEP_BIT_SCHED) | |
112 | #define TICK_DEP_MASK_CLOCK_UNSTABLE (1 << TICK_DEP_BIT_CLOCK_UNSTABLE) | |
113 | ||
c1797baf | 114 | #ifdef CONFIG_NO_HZ_COMMON |
4cc7ecb7 | 115 | extern bool tick_nohz_enabled; |
c1797baf | 116 | extern int tick_nohz_tick_stopped(void); |
1268fbc7 | 117 | extern void tick_nohz_idle_enter(void); |
280f0677 FW |
118 | extern void tick_nohz_idle_exit(void); |
119 | extern void tick_nohz_irq_exit(void); | |
4f86d3a8 | 120 | extern ktime_t tick_nohz_get_sleep_length(void); |
b7eaf1aa | 121 | extern unsigned long tick_nohz_get_idle_calls(void); |
466a2b42 | 122 | extern unsigned long tick_nohz_get_idle_calls_cpu(int cpu); |
6378ddb5 | 123 | extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time); |
0224cf4c | 124 | extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time); |
c1797baf | 125 | #else /* !CONFIG_NO_HZ_COMMON */ |
46373a15 | 126 | #define tick_nohz_enabled (0) |
c1797baf | 127 | static inline int tick_nohz_tick_stopped(void) { return 0; } |
2bbb6817 FW |
128 | static inline void tick_nohz_idle_enter(void) { } |
129 | static inline void tick_nohz_idle_exit(void) { } | |
280f0677 | 130 | |
4f86d3a8 LB |
131 | static inline ktime_t tick_nohz_get_sleep_length(void) |
132 | { | |
2456e855 | 133 | return NSEC_PER_SEC / HZ; |
4f86d3a8 | 134 | } |
8083e4ad | 135 | static inline u64 get_cpu_idle_time_us(int cpu, u64 *unused) { return -1; } |
0224cf4c | 136 | static inline u64 get_cpu_iowait_time_us(int cpu, u64 *unused) { return -1; } |
c1797baf | 137 | #endif /* !CONFIG_NO_HZ_COMMON */ |
906568c9 | 138 | |
c5bfece2 | 139 | #ifdef CONFIG_NO_HZ_FULL |
460775df FW |
140 | extern bool tick_nohz_full_running; |
141 | extern cpumask_var_t tick_nohz_full_mask; | |
142 | ||
143 | static inline bool tick_nohz_full_enabled(void) | |
144 | { | |
58135f57 | 145 | if (!context_tracking_is_enabled()) |
460775df FW |
146 | return false; |
147 | ||
148 | return tick_nohz_full_running; | |
149 | } | |
150 | ||
151 | static inline bool tick_nohz_full_cpu(int cpu) | |
152 | { | |
153 | if (!tick_nohz_full_enabled()) | |
154 | return false; | |
155 | ||
156 | return cpumask_test_cpu(cpu, tick_nohz_full_mask); | |
157 | } | |
158 | ||
83dedea8 CM |
159 | static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) |
160 | { | |
161 | if (tick_nohz_full_enabled()) | |
162 | cpumask_or(mask, mask, tick_nohz_full_mask); | |
163 | } | |
164 | ||
d027d45d FW |
165 | extern void tick_nohz_dep_set(enum tick_dep_bits bit); |
166 | extern void tick_nohz_dep_clear(enum tick_dep_bits bit); | |
167 | extern void tick_nohz_dep_set_cpu(int cpu, enum tick_dep_bits bit); | |
168 | extern void tick_nohz_dep_clear_cpu(int cpu, enum tick_dep_bits bit); | |
169 | extern void tick_nohz_dep_set_task(struct task_struct *tsk, | |
170 | enum tick_dep_bits bit); | |
171 | extern void tick_nohz_dep_clear_task(struct task_struct *tsk, | |
172 | enum tick_dep_bits bit); | |
173 | extern void tick_nohz_dep_set_signal(struct signal_struct *signal, | |
174 | enum tick_dep_bits bit); | |
175 | extern void tick_nohz_dep_clear_signal(struct signal_struct *signal, | |
176 | enum tick_dep_bits bit); | |
177 | ||
178 | /* | |
179 | * The below are tick_nohz_[set,clear]_dep() wrappers that optimize off-cases | |
180 | * on top of static keys. | |
181 | */ | |
182 | static inline void tick_dep_set(enum tick_dep_bits bit) | |
183 | { | |
184 | if (tick_nohz_full_enabled()) | |
185 | tick_nohz_dep_set(bit); | |
186 | } | |
187 | ||
188 | static inline void tick_dep_clear(enum tick_dep_bits bit) | |
189 | { | |
190 | if (tick_nohz_full_enabled()) | |
191 | tick_nohz_dep_clear(bit); | |
192 | } | |
193 | ||
194 | static inline void tick_dep_set_cpu(int cpu, enum tick_dep_bits bit) | |
195 | { | |
196 | if (tick_nohz_full_cpu(cpu)) | |
197 | tick_nohz_dep_set_cpu(cpu, bit); | |
198 | } | |
199 | ||
200 | static inline void tick_dep_clear_cpu(int cpu, enum tick_dep_bits bit) | |
201 | { | |
202 | if (tick_nohz_full_cpu(cpu)) | |
203 | tick_nohz_dep_clear_cpu(cpu, bit); | |
204 | } | |
205 | ||
206 | static inline void tick_dep_set_task(struct task_struct *tsk, | |
207 | enum tick_dep_bits bit) | |
208 | { | |
209 | if (tick_nohz_full_enabled()) | |
210 | tick_nohz_dep_set_task(tsk, bit); | |
211 | } | |
212 | static inline void tick_dep_clear_task(struct task_struct *tsk, | |
213 | enum tick_dep_bits bit) | |
214 | { | |
215 | if (tick_nohz_full_enabled()) | |
216 | tick_nohz_dep_clear_task(tsk, bit); | |
217 | } | |
218 | static inline void tick_dep_set_signal(struct signal_struct *signal, | |
219 | enum tick_dep_bits bit) | |
220 | { | |
221 | if (tick_nohz_full_enabled()) | |
222 | tick_nohz_dep_set_signal(signal, bit); | |
223 | } | |
224 | static inline void tick_dep_clear_signal(struct signal_struct *signal, | |
225 | enum tick_dep_bits bit) | |
226 | { | |
227 | if (tick_nohz_full_enabled()) | |
228 | tick_nohz_dep_clear_signal(signal, bit); | |
229 | } | |
230 | ||
3d36aebc | 231 | extern void tick_nohz_full_kick_cpu(int cpu); |
de734f89 | 232 | extern void __tick_nohz_task_switch(void); |
6f1982fe | 233 | extern void __init tick_nohz_full_setup(cpumask_var_t cpumask); |
a831881b | 234 | #else |
460775df FW |
235 | static inline bool tick_nohz_full_enabled(void) { return false; } |
236 | static inline bool tick_nohz_full_cpu(int cpu) { return false; } | |
83dedea8 | 237 | static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) { } |
d027d45d FW |
238 | |
239 | static inline void tick_dep_set(enum tick_dep_bits bit) { } | |
240 | static inline void tick_dep_clear(enum tick_dep_bits bit) { } | |
241 | static inline void tick_dep_set_cpu(int cpu, enum tick_dep_bits bit) { } | |
242 | static inline void tick_dep_clear_cpu(int cpu, enum tick_dep_bits bit) { } | |
243 | static inline void tick_dep_set_task(struct task_struct *tsk, | |
244 | enum tick_dep_bits bit) { } | |
245 | static inline void tick_dep_clear_task(struct task_struct *tsk, | |
246 | enum tick_dep_bits bit) { } | |
247 | static inline void tick_dep_set_signal(struct signal_struct *signal, | |
248 | enum tick_dep_bits bit) { } | |
249 | static inline void tick_dep_clear_signal(struct signal_struct *signal, | |
250 | enum tick_dep_bits bit) { } | |
251 | ||
3d36aebc | 252 | static inline void tick_nohz_full_kick_cpu(int cpu) { } |
de734f89 | 253 | static inline void __tick_nohz_task_switch(void) { } |
6f1982fe | 254 | static inline void tick_nohz_full_setup(cpumask_var_t cpumask) { } |
a831881b FW |
255 | #endif |
256 | ||
de734f89 | 257 | static inline void tick_nohz_task_switch(void) |
d13508f9 FW |
258 | { |
259 | if (tick_nohz_full_enabled()) | |
de734f89 | 260 | __tick_nohz_task_switch(); |
d13508f9 FW |
261 | } |
262 | ||
906568c9 | 263 | #endif |