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 extern void vtime_account_irq_enter(struct task_struct *tsk);
18 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
20 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
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.
27 static inline bool vtime_accounting_enabled(void)
29 return context_tracking_is_enabled();
32 static inline bool vtime_accounting_cpu_enabled(void)
34 if (vtime_accounting_enabled()) {
35 if (context_tracking_cpu_is_enabled())
41 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_GEN */
43 #ifndef CONFIG_VIRT_CPU_ACCOUNTING
44 static inline bool vtime_accounting_cpu_enabled(void) { return false; }
45 #endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
51 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
53 #ifdef __ARCH_HAS_VTIME_TASK_SWITCH
54 extern void vtime_task_switch(struct task_struct *prev);
56 extern void vtime_common_task_switch(struct task_struct *prev);
57 static inline void vtime_task_switch(struct task_struct *prev)
59 if (vtime_accounting_cpu_enabled())
60 vtime_common_task_switch(prev);
62 #endif /* __ARCH_HAS_VTIME_TASK_SWITCH */
64 extern void vtime_account_system(struct task_struct *tsk);
65 extern void vtime_account_idle(struct task_struct *tsk);
66 extern void vtime_account_user(struct task_struct *tsk);
68 #else /* !CONFIG_VIRT_CPU_ACCOUNTING */
70 static inline void vtime_task_switch(struct task_struct *prev) { }
71 static inline void vtime_account_system(struct task_struct *tsk) { }
72 static inline void vtime_account_user(struct task_struct *tsk) { }
73 static inline void vtime_account_irq_enter(struct task_struct *tsk) { }
74 #endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
76 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
77 extern void arch_vtime_task_switch(struct task_struct *tsk);
78 static inline void vtime_account_irq_enter(struct task_struct *tsk) { }
79 static inline void vtime_account_irq_exit(struct task_struct *tsk) { }
81 extern void vtime_user_enter(struct task_struct *tsk);
83 static inline void vtime_user_exit(struct task_struct *tsk)
85 vtime_account_user(tsk);
87 extern void vtime_guest_enter(struct task_struct *tsk);
88 extern void vtime_guest_exit(struct task_struct *tsk);
89 extern void vtime_init_idle(struct task_struct *tsk, int cpu);
90 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */
91 static inline void vtime_account_irq_exit(struct task_struct *tsk)
93 /* On hard|softirq exit we always account to hard|softirq cputime */
94 vtime_account_system(tsk);
96 static inline void vtime_user_enter(struct task_struct *tsk) { }
97 static inline void vtime_user_exit(struct task_struct *tsk) { }
98 static inline void vtime_guest_enter(struct task_struct *tsk) { }
99 static inline void vtime_guest_exit(struct task_struct *tsk) { }
100 static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { }
103 #ifdef CONFIG_IRQ_TIME_ACCOUNTING
104 extern void irqtime_account_irq(struct task_struct *tsk);
106 static inline void irqtime_account_irq(struct task_struct *tsk) { }
109 static inline void account_irq_enter_time(struct task_struct *tsk)
111 vtime_account_irq_enter(tsk);
112 irqtime_account_irq(tsk);
115 static inline void account_irq_exit_time(struct task_struct *tsk)
117 vtime_account_irq_exit(tsk);
118 irqtime_account_irq(tsk);
121 #endif /* _LINUX_KERNEL_VTIME_H */