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review.shift-gmbh.com / SHIFTPHONES / kernel / shift / mainline / 81da3d3c1015e1db8b5fa121d4f6f9172d0299f3 / . / include / linux / vtime.h
blob: 2cdeca062db32c04388c654b2429381b4c17a23f [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +0100[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0 */
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]2#ifndef _LINUX_KERNEL_VTIME_H
3#define _LINUX_KERNEL_VTIME_H
4
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]5#include <linux/context_tracking_state.h>
Frederic Weisbeckera5725ac2013-07-16 18:50:52 +0200[diff] [blame]6#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
7#include <asm/vtime.h>
8#endif
9
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]10
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]11struct task_struct;
12
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]13/*
Frederic Weisbeckere44fcb42019-10-16 04:56:54 +0200[diff] [blame]14 * vtime_accounting_enabled_this_cpu() definitions/declarations
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]15 */
Frederic Weisbecker8612f172016-07-13 16:50:04 +0200[diff] [blame]16#if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE)
Frederic Weisbecker8d495472019-10-03 18:17:45 +0200[diff] [blame]17
Frederic Weisbeckere44fcb42019-10-16 04:56:54 +0200[diff] [blame]18static inline bool vtime_accounting_enabled_this_cpu(void) { return true; }
Frederic Weisbecker8d495472019-10-03 18:17:45 +0200[diff] [blame]19extern void vtime_task_switch(struct task_struct *prev);
20
Frederic Weisbecker8612f172016-07-13 16:50:04 +0200[diff] [blame]21#elif defined(CONFIG_VIRT_CPU_ACCOUNTING_GEN)
Frederic Weisbecker8d495472019-10-03 18:17:45 +0200[diff] [blame]22
Frederic Weisbeckere5925392015-11-19 16:47:33 +0100[diff] [blame]23/*
24 * Checks if vtime is enabled on some CPU. Cputime readers want to be careful
25 * in that case and compute the tickless cputime.
26 * For now vtime state is tied to context tracking. We might want to decouple
27 * those later if necessary.
28 */
29static inline bool vtime_accounting_enabled(void)
30{
Frederic Weisbecker74c57872019-10-16 04:56:51 +0200[diff] [blame]31 return context_tracking_enabled();
Frederic Weisbeckere5925392015-11-19 16:47:33 +0100[diff] [blame]32}
33
Frederic Weisbecker9adbb9d2019-10-16 04:56:55 +0200[diff] [blame]34static inline bool vtime_accounting_enabled_cpu(int cpu)
35{
Frederic Weisbecker023e9de2019-10-16 04:56:56 +0200[diff] [blame]36 return context_tracking_enabled_cpu(cpu);
Frederic Weisbecker9adbb9d2019-10-16 04:56:55 +0200[diff] [blame]37}
38
Frederic Weisbeckere44fcb42019-10-16 04:56:54 +0200[diff] [blame]39static inline bool vtime_accounting_enabled_this_cpu(void)
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]40{
Frederic Weisbecker023e9de2019-10-16 04:56:56 +0200[diff] [blame]41 return context_tracking_enabled_this_cpu();
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]42}
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]43
Frederic Weisbecker8d495472019-10-03 18:17:45 +0200[diff] [blame]44extern void vtime_task_switch_generic(struct task_struct *prev);
45
46static inline void vtime_task_switch(struct task_struct *prev)
47{
Frederic Weisbeckere44fcb42019-10-16 04:56:54 +0200[diff] [blame]48 if (vtime_accounting_enabled_this_cpu())
Frederic Weisbecker8d495472019-10-03 18:17:45 +0200[diff] [blame]49 vtime_task_switch_generic(prev);
50}
51
52#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
53
Frederic Weisbecker9adbb9d2019-10-16 04:56:55 +0200[diff] [blame]54static inline bool vtime_accounting_enabled_cpu(int cpu) {return false; }
Frederic Weisbeckere44fcb42019-10-16 04:56:54 +0200[diff] [blame]55static inline bool vtime_accounting_enabled_this_cpu(void) { return false; }
Frederic Weisbecker8d495472019-10-03 18:17:45 +0200[diff] [blame]56static inline void vtime_task_switch(struct task_struct *prev) { }
57
58#endif
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]59
60/*
61 * Common vtime APIs
62 */
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]63#ifdef CONFIG_VIRT_CPU_ACCOUNTING
Frederic Weisbeckerf83eeb12019-10-03 18:17:44 +0200[diff] [blame]64extern void vtime_account_kernel(struct task_struct *tsk);
Frederic Weisbeckerfd25b4c2012-11-13 18:21:22 +0100[diff] [blame]65extern void vtime_account_idle(struct task_struct *tsk);
Frederic Weisbecker3f4724e2012-07-16 18:00:34 +0200[diff] [blame]66#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
Frederic Weisbeckerf83eeb12019-10-03 18:17:44 +0200[diff] [blame]67static inline void vtime_account_kernel(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 Weisbecker1c3eda02017-06-29 19:15:07 +0200[diff] [blame]73extern void vtime_user_exit(struct task_struct *tsk);
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]74extern void vtime_guest_enter(struct task_struct *tsk);
75extern void vtime_guest_exit(struct task_struct *tsk);
Frederic Weisbecker45eacc62013-05-15 22:16:32 +0200[diff] [blame]76extern void vtime_init_idle(struct task_struct *tsk, int cpu);
Frederic Weisbeckerb0493402013-07-12 03:10:15 +0200[diff] [blame]77#else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */
Frederic Weisbeckerabf917c2012-07-25 07:56:04 +0200[diff] [blame]78static inline void vtime_user_enter(struct task_struct *tsk) { }
79static inline void vtime_user_exit(struct task_struct *tsk) { }
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]80static inline void vtime_guest_enter(struct task_struct *tsk) { }
81static inline void vtime_guest_exit(struct task_struct *tsk) { }
Frederic Weisbecker45eacc62013-05-15 22:16:32 +0200[diff] [blame]82static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { }
Frederic Weisbeckerabf917c2012-07-25 07:56:04 +0200[diff] [blame]83#endif
84
Frederic Weisbecker8612f172016-07-13 16:50:04 +0200[diff] [blame]85#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
86extern void vtime_account_irq_enter(struct task_struct *tsk);
87static inline void vtime_account_irq_exit(struct task_struct *tsk)
88{
89 /* On hard|softirq exit we always account to hard|softirq cputime */
Frederic Weisbeckerf83eeb12019-10-03 18:17:44 +0200[diff] [blame]90 vtime_account_kernel(tsk);
Frederic Weisbecker8612f172016-07-13 16:50:04 +0200[diff] [blame]91}
Frederic Weisbeckerc8d7dab2017-01-05 18:11:50 +0100[diff] [blame]92extern void vtime_flush(struct task_struct *tsk);
Frederic Weisbecker8612f172016-07-13 16:50:04 +0200[diff] [blame]93#else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
94static inline void vtime_account_irq_enter(struct task_struct *tsk) { }
95static inline void vtime_account_irq_exit(struct task_struct *tsk) { }
Frederic Weisbeckerc8d7dab2017-01-05 18:11:50 +0100[diff] [blame]96static inline void vtime_flush(struct task_struct *tsk) { }
Frederic Weisbecker8612f172016-07-13 16:50:04 +0200[diff] [blame]97#endif
98
99
Frederic Weisbecker3e1df4f52012-10-06 05:23:22 +0200[diff] [blame]100#ifdef CONFIG_IRQ_TIME_ACCOUNTING
101extern void irqtime_account_irq(struct task_struct *tsk);
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]102#else
Frederic Weisbecker3e1df4f52012-10-06 05:23:22 +0200[diff] [blame]103static inline void irqtime_account_irq(struct task_struct *tsk) { }
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]104#endif
105
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]106static inline void account_irq_enter_time(struct task_struct *tsk)
Frederic Weisbeckerfa5058f2012-10-06 04:07:19 +0200[diff] [blame]107{
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]108 vtime_account_irq_enter(tsk);
Frederic Weisbecker3e1df4f52012-10-06 05:23:22 +0200[diff] [blame]109 irqtime_account_irq(tsk);
Frederic Weisbeckerfa5058f2012-10-06 04:07:19 +0200[diff] [blame]110}
111
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]112static inline void account_irq_exit_time(struct task_struct *tsk)
Frederic Weisbeckerfa5058f2012-10-06 04:07:19 +0200[diff] [blame]113{
Frederic Weisbecker6a616712012-12-16 20:00:34 +0100[diff] [blame]114 vtime_account_irq_exit(tsk);
Frederic Weisbecker3e1df4f52012-10-06 05:23:22 +0200[diff] [blame]115 irqtime_account_irq(tsk);
Frederic Weisbeckerfa5058f2012-10-06 04:07:19 +0200[diff] [blame]116}
117
Frederic Weisbeckerdcbf8322012-10-05 23:07:19 +0200[diff] [blame]118#endif /* _LINUX_KERNEL_VTIME_H */