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gerrit-public.fairphone.software / kernel / msm-4.9 / a18908edd5d012e5bba60da58de3d94691a4ca4d / . / include / linux / vtime.h
blob: aa9bfea8804a0c74d2d6e0be1bac5eb4f3f119c0 [file] [log] [blame]
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]1#ifndef _LINUX_KERNEL_VTIME_H
2#define _LINUX_KERNEL_VTIME_H
3
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]4#include <linux/context_tracking_state.h>
Frederic Weisbeckera5725ac2013-07-16 18:50:52 +0200[diff] [blame]5#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
6#include <asm/vtime.h>
7#endif
8
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]9
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]10struct task_struct;
11
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]12/*
Frederic Weisbecker55dbdcf2015-11-19 16:47:32 +0100[diff] [blame]13 * vtime_accounting_cpu_enabled() definitions/declarations
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]14 */
Frederic Weisbecker8612f172016-07-13 16:50:04 +0200[diff] [blame]15#if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE)
Frederic Weisbecker55dbdcf2015-11-19 16:47:32 +0100[diff] [blame]16static inline bool vtime_accounting_cpu_enabled(void) { return true; }
Frederic Weisbecker8612f172016-07-13 16:50:04 +0200[diff] [blame]17#elif defined(CONFIG_VIRT_CPU_ACCOUNTING_GEN)
Frederic Weisbeckere5925392015-11-19 16:47:33 +0100[diff] [blame]18/*
19 * Checks if vtime is enabled on some CPU. Cputime readers want to be careful
20 * in that case and compute the tickless cputime.
21 * For now vtime state is tied to context tracking. We might want to decouple
22 * those later if necessary.
23 */
24static inline bool vtime_accounting_enabled(void)
25{
26 return context_tracking_is_enabled();
27}
28
Frederic Weisbecker55dbdcf2015-11-19 16:47:32 +0100[diff] [blame]29static inline bool vtime_accounting_cpu_enabled(void)
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]30{
Frederic Weisbeckere5925392015-11-19 16:47:33 +0100[diff] [blame]31 if (vtime_accounting_enabled()) {
Frederic Weisbeckerd0df09e2013-11-06 15:11:57 +0100[diff] [blame]32 if (context_tracking_cpu_is_enabled())
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]33 return true;
34 }
35
36 return false;
37}
Frederic Weisbecker8612f172016-07-13 16:50:04 +0200[diff] [blame]38#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
Frederic Weisbecker55dbdcf2015-11-19 16:47:32 +0100[diff] [blame]39static inline bool vtime_accounting_cpu_enabled(void) { return false; }
Frederic Weisbecker8612f172016-07-13 16:50:04 +0200[diff] [blame]40#endif
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]41
42
43/*
44 * Common vtime APIs
45 */
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]46#ifdef CONFIG_VIRT_CPU_ACCOUNTING
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]47
48#ifdef __ARCH_HAS_VTIME_TASK_SWITCH
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]49extern void vtime_task_switch(struct task_struct *prev);
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]50#else
51extern void vtime_common_task_switch(struct task_struct *prev);
52static inline void vtime_task_switch(struct task_struct *prev)
53{
Frederic Weisbecker55dbdcf2015-11-19 16:47:32 +0100[diff] [blame]54 if (vtime_accounting_cpu_enabled())
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]55 vtime_common_task_switch(prev);
56}
57#endif /* __ARCH_HAS_VTIME_TASK_SWITCH */
58
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]59extern void vtime_account_system(struct task_struct *tsk);
Frederic Weisbeckerfd25b4c2012-11-13 18:21:22 +0100[diff] [blame]60extern void vtime_account_idle(struct task_struct *tsk);
Frederic Weisbeckerbcebdf82012-11-13 23:51:06 +0100[diff] [blame]61extern void vtime_account_user(struct task_struct *tsk);
Frederic Weisbecker3f4724e2012-07-16 18:00:34 +0200[diff] [blame]62
Frederic Weisbecker3f4724e2012-07-16 18:00:34 +0200[diff] [blame]63#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]64
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]65static inline void vtime_task_switch(struct task_struct *prev) { }
Frederic Weisbecker11113332012-10-24 18:05:51 +0200[diff] [blame]66static inline void vtime_account_system(struct task_struct *tsk) { }
Frederic Weisbeckerabf917c2012-07-25 07:56:04 +0200[diff] [blame]67static inline void vtime_account_user(struct task_struct *tsk) { }
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]68#endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]69
Frederic Weisbeckerabf917c2012-07-25 07:56:04 +0200[diff] [blame]70#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]71extern void arch_vtime_task_switch(struct task_struct *tsk);
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]72extern void vtime_user_enter(struct task_struct *tsk);
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]73
Frederic Weisbeckerabf917c2012-07-25 07:56:04 +0200[diff] [blame]74static inline void vtime_user_exit(struct task_struct *tsk)
75{
76 vtime_account_user(tsk);
77}
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]78extern void vtime_guest_enter(struct task_struct *tsk);
79extern void vtime_guest_exit(struct task_struct *tsk);
Frederic Weisbecker45eacc62013-05-15 22:16:32 +0200[diff] [blame]80extern void vtime_init_idle(struct task_struct *tsk, int cpu);
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]81#else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */
Frederic Weisbeckerabf917c2012-07-25 07:56:04 +0200[diff] [blame]82static inline void vtime_user_enter(struct task_struct *tsk) { }
83static inline void vtime_user_exit(struct task_struct *tsk) { }
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]84static inline void vtime_guest_enter(struct task_struct *tsk) { }
85static inline void vtime_guest_exit(struct task_struct *tsk) { }
Frederic Weisbecker45eacc62013-05-15 22:16:32 +0200[diff] [blame]86static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { }
Frederic Weisbeckerabf917c2012-07-25 07:56:04 +0200[diff] [blame]87#endif
88
Frederic Weisbecker8612f172016-07-13 16:50:04 +0200[diff] [blame]89#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
90extern void vtime_account_irq_enter(struct task_struct *tsk);
91static inline void vtime_account_irq_exit(struct task_struct *tsk)
92{
93 /* On hard|softirq exit we always account to hard|softirq cputime */
94 vtime_account_system(tsk);
95}
96#else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
97static inline void vtime_account_irq_enter(struct task_struct *tsk) { }
98static inline void vtime_account_irq_exit(struct task_struct *tsk) { }
99#endif
100
101
Frederic Weisbecker3e1df4f52012-10-06 05:23:22 +0200[diff] [blame]102#ifdef CONFIG_IRQ_TIME_ACCOUNTING
103extern void irqtime_account_irq(struct task_struct *tsk);
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]104#else
Frederic Weisbecker3e1df4f52012-10-06 05:23:22 +0200[diff] [blame]105static inline void irqtime_account_irq(struct task_struct *tsk) { }
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]106#endif
107
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]108static inline void account_irq_enter_time(struct task_struct *tsk)
Frederic Weisbeckerfa5058f2012-10-06 04:07:19 +0200[diff] [blame]109{
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]110 vtime_account_irq_enter(tsk);
Frederic Weisbecker3e1df4f52012-10-06 05:23:22 +0200[diff] [blame]111 irqtime_account_irq(tsk);
Frederic Weisbeckerfa5058f2012-10-06 04:07:19 +0200[diff] [blame]112}
113
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]114static inline void account_irq_exit_time(struct task_struct *tsk)
Frederic Weisbeckerfa5058f2012-10-06 04:07:19 +0200[diff] [blame]115{
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]116 vtime_account_irq_exit(tsk);
Frederic Weisbecker3e1df4f52012-10-06 05:23:22 +0200[diff] [blame]117 irqtime_account_irq(tsk);
Frederic Weisbeckerfa5058f2012-10-06 04:07:19 +0200[diff] [blame]118}
119
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]120#endif /* _LINUX_KERNEL_VTIME_H */