1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_KERNEL_VTIME_H
3 #define _LINUX_KERNEL_VTIME_H
5 #include <linux/context_tracking_state.h>
6 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
14 * vtime_accounting_cpu_enabled() definitions/declarations
16 #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE)
17 static inline bool vtime_accounting_cpu_enabled(void) { return true; }
18 #elif defined(CONFIG_VIRT_CPU_ACCOUNTING_GEN)
20 * Checks if vtime is enabled on some CPU. Cputime readers want to be careful
21 * in that case and compute the tickless cputime.
22 * For now vtime state is tied to context tracking. We might want to decouple
23 * those later if necessary.
25 static inline bool vtime_accounting_enabled(void)
27 return context_tracking_is_enabled();
30 static inline bool vtime_accounting_cpu_enabled(void)
32 if (vtime_accounting_enabled()) {
33 if (context_tracking_cpu_is_enabled())
39 #else /* !CONFIG_VIRT_CPU_ACCOUNTING */
40 static inline bool vtime_accounting_cpu_enabled(void) { return false; }
47 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
49 #ifdef __ARCH_HAS_VTIME_TASK_SWITCH
50 extern void vtime_task_switch(struct task_struct *prev);
52 extern void vtime_common_task_switch(struct task_struct *prev);
53 static inline void vtime_task_switch(struct task_struct *prev)
55 if (vtime_accounting_cpu_enabled())
56 vtime_common_task_switch(prev);
58 #endif /* __ARCH_HAS_VTIME_TASK_SWITCH */
60 extern void vtime_account_system(struct task_struct *tsk);
61 extern void vtime_account_idle(struct task_struct *tsk);
63 #else /* !CONFIG_VIRT_CPU_ACCOUNTING */
65 static inline void vtime_task_switch(struct task_struct *prev) { }
66 static inline void vtime_account_system(struct task_struct *tsk) { }
67 #endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
69 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
70 extern void arch_vtime_task_switch(struct task_struct *tsk);
71 extern void vtime_user_enter(struct task_struct *tsk);
72 extern void vtime_user_exit(struct task_struct *tsk);
73 extern void vtime_guest_enter(struct task_struct *tsk);
74 extern void vtime_guest_exit(struct task_struct *tsk);
75 extern void vtime_init_idle(struct task_struct *tsk, int cpu);
76 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */
77 static inline void vtime_user_enter(struct task_struct *tsk) { }
78 static inline void vtime_user_exit(struct task_struct *tsk) { }
79 static inline void vtime_guest_enter(struct task_struct *tsk) { }
80 static inline void vtime_guest_exit(struct task_struct *tsk) { }
81 static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { }
84 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
85 extern void vtime_account_irq_enter(struct task_struct *tsk);
86 static inline void vtime_account_irq_exit(struct task_struct *tsk)
88 /* On hard|softirq exit we always account to hard|softirq cputime */
89 vtime_account_system(tsk);
91 extern void vtime_flush(struct task_struct *tsk);
92 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
93 static inline void vtime_account_irq_enter(struct task_struct *tsk) { }
94 static inline void vtime_account_irq_exit(struct task_struct *tsk) { }
95 static inline void vtime_flush(struct task_struct *tsk) { }
99 #ifdef CONFIG_IRQ_TIME_ACCOUNTING
100 extern void irqtime_account_irq(struct task_struct *tsk);
102 static inline void irqtime_account_irq(struct task_struct *tsk) { }
105 static inline void account_irq_enter_time(struct task_struct *tsk)
107 vtime_account_irq_enter(tsk);
108 irqtime_account_irq(tsk);
111 static inline void account_irq_exit_time(struct task_struct *tsk)
113 vtime_account_irq_exit(tsk);
114 irqtime_account_irq(tsk);
117 #endif /* _LINUX_KERNEL_VTIME_H */