Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _LINUX_KERNEL_VTIME_H
2#define _LINUX_KERNEL_VTIME_H
3
4#include <linux/context_tracking_state.h>
5#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
6#include <asm/vtime.h>
7#endif
8
9
10struct task_struct;
11
12/*
13 * vtime_accounting_cpu_enabled() definitions/declarations
14 */
15#if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE)
16static inline bool vtime_accounting_cpu_enabled(void) { return true; }
17#elif defined(CONFIG_VIRT_CPU_ACCOUNTING_GEN)
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
29static inline bool vtime_accounting_cpu_enabled(void)
30{
31 if (vtime_accounting_enabled()) {
32 if (context_tracking_cpu_is_enabled())
33 return true;
34 }
35
36 return false;
37}
38#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
39static inline bool vtime_accounting_cpu_enabled(void) { return false; }
40#endif
41
42
43/*
44 * Common vtime APIs
45 */
46#ifdef CONFIG_VIRT_CPU_ACCOUNTING
47
48#ifdef __ARCH_HAS_VTIME_TASK_SWITCH
49extern void vtime_task_switch(struct task_struct *prev);
50#else
51extern void vtime_common_task_switch(struct task_struct *prev);
52static inline void vtime_task_switch(struct task_struct *prev)
53{
54 if (vtime_accounting_cpu_enabled())
55 vtime_common_task_switch(prev);
56}
57#endif /* __ARCH_HAS_VTIME_TASK_SWITCH */
58
59extern void vtime_account_system(struct task_struct *tsk);
60extern void vtime_account_idle(struct task_struct *tsk);
61extern void vtime_account_user(struct task_struct *tsk);
62
63#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
64
65static inline void vtime_task_switch(struct task_struct *prev) { }
66static inline void vtime_account_system(struct task_struct *tsk) { }
67static inline void vtime_account_user(struct task_struct *tsk) { }
68#endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
69
70#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
71extern void arch_vtime_task_switch(struct task_struct *tsk);
72extern void vtime_user_enter(struct task_struct *tsk);
73
74static inline void vtime_user_exit(struct task_struct *tsk)
75{
76 vtime_account_user(tsk);
77}
78extern void vtime_guest_enter(struct task_struct *tsk);
79extern void vtime_guest_exit(struct task_struct *tsk);
80extern void vtime_init_idle(struct task_struct *tsk, int cpu);
81#else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */
82static inline void vtime_user_enter(struct task_struct *tsk) { }
83static inline void vtime_user_exit(struct task_struct *tsk) { }
84static inline void vtime_guest_enter(struct task_struct *tsk) { }
85static inline void vtime_guest_exit(struct task_struct *tsk) { }
86static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { }
87#endif
88
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
102#ifdef CONFIG_IRQ_TIME_ACCOUNTING
103extern void irqtime_account_irq(struct task_struct *tsk);
104#else
105static inline void irqtime_account_irq(struct task_struct *tsk) { }
106#endif
107
108static inline void account_irq_enter_time(struct task_struct *tsk)
109{
110 vtime_account_irq_enter(tsk);
111 irqtime_account_irq(tsk);
112}
113
114static inline void account_irq_exit_time(struct task_struct *tsk)
115{
116 vtime_account_irq_exit(tsk);
117 irqtime_account_irq(tsk);
118}
119
120#endif /* _LINUX_KERNEL_VTIME_H */