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gerrit.openfyde.cn / github.com / raspberrypi / raspberrypi-kernel / 0cfdf9a198b0d4f5ad6c87d894db7830b796b2cc / . / include / linux / vtime.h
blob: 65aef5e9d04ea1b58c942a3355e521835c876340 [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 */
15#ifdef 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; }
Rik van Rielb58c3582016-07-13 16:50:02 +0200[diff] [blame]17extern void vtime_account_irq_enter(struct task_struct *tsk);
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]18#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
19
20#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
Frederic Weisbeckere5925392015-11-19 16:47:33 +0100[diff] [blame]21/*
22 * Checks if vtime is enabled on some CPU. Cputime readers want to be careful
23 * in that case and compute the tickless cputime.
24 * For now vtime state is tied to context tracking. We might want to decouple
25 * those later if necessary.
26 */
27static inline bool vtime_accounting_enabled(void)
28{
29 return context_tracking_is_enabled();
30}
31
Frederic Weisbecker55dbdcf2015-11-19 16:47:32 +0100[diff] [blame]32static inline bool vtime_accounting_cpu_enabled(void)
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]33{
Frederic Weisbeckere5925392015-11-19 16:47:33 +0100[diff] [blame]34 if (vtime_accounting_enabled()) {
Frederic Weisbeckerd0df09e2013-11-06 15:11:57 +0100[diff] [blame]35 if (context_tracking_cpu_is_enabled())
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]36 return true;
37 }
38
39 return false;
40}
41#endif /* CONFIG_VIRT_CPU_ACCOUNTING_GEN */
42
43#ifndef CONFIG_VIRT_CPU_ACCOUNTING
Frederic Weisbecker55dbdcf2015-11-19 16:47:32 +0100[diff] [blame]44static inline bool vtime_accounting_cpu_enabled(void) { return false; }
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]45#endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
46
47
48/*
49 * Common vtime APIs
50 */
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]51#ifdef CONFIG_VIRT_CPU_ACCOUNTING
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]52
53#ifdef __ARCH_HAS_VTIME_TASK_SWITCH
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]54extern void vtime_task_switch(struct task_struct *prev);
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]55#else
56extern void vtime_common_task_switch(struct task_struct *prev);
57static inline void vtime_task_switch(struct task_struct *prev)
58{
Frederic Weisbecker55dbdcf2015-11-19 16:47:32 +0100[diff] [blame]59 if (vtime_accounting_cpu_enabled())
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]60 vtime_common_task_switch(prev);
61}
62#endif /* __ARCH_HAS_VTIME_TASK_SWITCH */
63
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]64extern void vtime_account_system(struct task_struct *tsk);
Frederic Weisbeckerfd25b4c2012-11-13 18:21:22 +0100[diff] [blame]65extern void vtime_account_idle(struct task_struct *tsk);
Frederic Weisbeckerbcebdf82012-11-13 23:51:06 +0100[diff] [blame]66extern void vtime_account_user(struct task_struct *tsk);
Frederic Weisbecker3f4724e2012-07-16 18:00:34 +0200[diff] [blame]67
Frederic Weisbecker3f4724e2012-07-16 18:00:34 +0200[diff] [blame]68#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]69
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]70static inline void vtime_task_switch(struct task_struct *prev) { }
Frederic Weisbecker11113332012-10-24 18:05:51 +0200[diff] [blame]71static inline void vtime_account_system(struct task_struct *tsk) { }
Frederic Weisbeckerabf917c2012-07-25 07:56:04 +0200[diff] [blame]72static inline void vtime_account_user(struct task_struct *tsk) { }
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]73static inline void vtime_account_irq_enter(struct task_struct *tsk) { }
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]74#endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]75
Frederic Weisbeckerabf917c2012-07-25 07:56:04 +0200[diff] [blame]76#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]77extern void arch_vtime_task_switch(struct task_struct *tsk);
Rik van Rielb58c3582016-07-13 16:50:02 +0200[diff] [blame]78static inline void vtime_account_irq_enter(struct task_struct *tsk) { }
79static inline void vtime_account_irq_exit(struct task_struct *tsk) { }
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]80
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]81extern void vtime_user_enter(struct task_struct *tsk);
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]82
Frederic Weisbeckerabf917c2012-07-25 07:56:04 +0200[diff] [blame]83static inline void vtime_user_exit(struct task_struct *tsk)
84{
85 vtime_account_user(tsk);
86}
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]87extern void vtime_guest_enter(struct task_struct *tsk);
88extern void vtime_guest_exit(struct task_struct *tsk);
Frederic Weisbecker45eacc62013-05-15 22:16:32 +0200[diff] [blame]89extern void vtime_init_idle(struct task_struct *tsk, int cpu);
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]90#else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]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}
Frederic Weisbeckerabf917c2012-07-25 07:56:04 +0200[diff] [blame]96static inline void vtime_user_enter(struct task_struct *tsk) { }
97static inline void vtime_user_exit(struct task_struct *tsk) { }
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]98static inline void vtime_guest_enter(struct task_struct *tsk) { }
99static inline void vtime_guest_exit(struct task_struct *tsk) { }
Frederic Weisbecker45eacc62013-05-15 22:16:32 +0200[diff] [blame]100static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { }
Frederic Weisbeckerabf917c2012-07-25 07:56:04 +0200[diff] [blame]101#endif
102
Frederic Weisbecker3e1df4f52012-10-06 05:23:22 +0200[diff] [blame]103#ifdef CONFIG_IRQ_TIME_ACCOUNTING
104extern void irqtime_account_irq(struct task_struct *tsk);
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]105#else
Frederic Weisbecker3e1df4f52012-10-06 05:23:22 +0200[diff] [blame]106static inline void irqtime_account_irq(struct task_struct *tsk) { }
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]107#endif
108
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]109static inline void account_irq_enter_time(struct task_struct *tsk)
Frederic Weisbeckerfa5058f2012-10-06 04:07:19 +0200[diff] [blame]110{
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]111 vtime_account_irq_enter(tsk);
Frederic Weisbecker3e1df4f52012-10-06 05:23:22 +0200[diff] [blame]112 irqtime_account_irq(tsk);
Frederic Weisbeckerfa5058f2012-10-06 04:07:19 +0200[diff] [blame]113}
114
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]115static inline void account_irq_exit_time(struct task_struct *tsk)
Frederic Weisbeckerfa5058f2012-10-06 04:07:19 +0200[diff] [blame]116{
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]117 vtime_account_irq_exit(tsk);
Frederic Weisbecker3e1df4f52012-10-06 05:23:22 +0200[diff] [blame]118 irqtime_account_irq(tsk);
Frederic Weisbeckerfa5058f2012-10-06 04:07:19 +0200[diff] [blame]119}
120
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]121#endif /* _LINUX_KERNEL_VTIME_H */