1 #ifndef _LINUX_KERNEL_VTIME_H
2 #define _LINUX_KERNEL_VTIME_H
4 #include <linux/context_tracking_state.h>
5 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
13 * vtime_accounting_cpu_enabled() definitions/declarations
15 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
16 static inline bool vtime_accounting_cpu_enabled(void) { return true; }
17 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
19 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
21 * Checks if vtime is enabled on some CPU. Cputime readers want to be careful
22 * in that case and compute the tickless cputime.
23 * For now vtime state is tied to context tracking. We might want to decouple
24 * those later if necessary.
26 static inline bool vtime_accounting_enabled(void)
28 return context_tracking_is_enabled();
31 static inline bool vtime_accounting_cpu_enabled(void)
33 if (vtime_accounting_enabled()) {
34 if (context_tracking_cpu_is_enabled())
40 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_GEN */
42 #ifndef CONFIG_VIRT_CPU_ACCOUNTING
43 static inline bool vtime_accounting_cpu_enabled(void) { return false; }
44 #endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
50 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
52 #ifdef __ARCH_HAS_VTIME_TASK_SWITCH
53 extern void vtime_task_switch(struct task_struct *prev);
55 extern void vtime_common_task_switch(struct task_struct *prev);
56 static inline void vtime_task_switch(struct task_struct *prev)
58 if (vtime_accounting_cpu_enabled())
59 vtime_common_task_switch(prev);
61 #endif /* __ARCH_HAS_VTIME_TASK_SWITCH */
63 extern void vtime_account_system(struct task_struct *tsk);
64 extern void vtime_account_idle(struct task_struct *tsk);
65 extern void vtime_account_user(struct task_struct *tsk);
67 #ifdef __ARCH_HAS_VTIME_ACCOUNT
68 extern void vtime_account_irq_enter(struct task_struct *tsk);
70 extern void vtime_common_account_irq_enter(struct task_struct *tsk);
71 static inline void vtime_account_irq_enter(struct task_struct *tsk)
73 if (vtime_accounting_cpu_enabled())
74 vtime_common_account_irq_enter(tsk);
76 #endif /* __ARCH_HAS_VTIME_ACCOUNT */
78 #else /* !CONFIG_VIRT_CPU_ACCOUNTING */
80 static inline void vtime_task_switch(struct task_struct *prev) { }
81 static inline void vtime_account_system(struct task_struct *tsk) { }
82 static inline void vtime_account_user(struct task_struct *tsk) { }
83 static inline void vtime_account_irq_enter(struct task_struct *tsk) { }
84 #endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
86 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
87 extern void arch_vtime_task_switch(struct task_struct *tsk);
88 extern void vtime_gen_account_irq_exit(struct task_struct *tsk);
90 static inline void vtime_account_irq_exit(struct task_struct *tsk)
92 if (vtime_accounting_cpu_enabled())
93 vtime_gen_account_irq_exit(tsk);
96 extern void vtime_user_enter(struct task_struct *tsk);
98 static inline void vtime_user_exit(struct task_struct *tsk)
100 vtime_account_user(tsk);
102 extern void vtime_guest_enter(struct task_struct *tsk);
103 extern void vtime_guest_exit(struct task_struct *tsk);
104 extern void vtime_init_idle(struct task_struct *tsk, int cpu);
105 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */
106 static inline void vtime_account_irq_exit(struct task_struct *tsk)
108 /* On hard|softirq exit we always account to hard|softirq cputime */
109 vtime_account_system(tsk);
111 static inline void vtime_user_enter(struct task_struct *tsk) { }
112 static inline void vtime_user_exit(struct task_struct *tsk) { }
113 static inline void vtime_guest_enter(struct task_struct *tsk) { }
114 static inline void vtime_guest_exit(struct task_struct *tsk) { }
115 static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { }
118 #ifdef CONFIG_IRQ_TIME_ACCOUNTING
119 extern void irqtime_account_irq(struct task_struct *tsk);
121 static inline void irqtime_account_irq(struct task_struct *tsk) { }
124 static inline void account_irq_enter_time(struct task_struct *tsk)
126 vtime_account_irq_enter(tsk);
127 irqtime_account_irq(tsk);
130 static inline void account_irq_exit_time(struct task_struct *tsk)
132 vtime_account_irq_exit(tsk);
133 irqtime_account_irq(tsk);
136 #endif /* _LINUX_KERNEL_VTIME_H */