include/linux/vtime.h

   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
  10 struct task_struct;
  11
  12 /*
  13  * vtime_accounting_enabled() definitions/declarations
  14  */
  15 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  16 static inline bool vtime_accounting_enabled(void) { return true; }
  17 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
  18
  19 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
  20 static inline bool vtime_accounting_enabled(void)
  21 {
  22         if (static_key_false(&context_tracking_enabled)) {
  23                 if (context_tracking_active())
  24                         return true;
  25         }
  26
  27         return false;
  28 }
  29 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_GEN */
  30
  31 #ifndef CONFIG_VIRT_CPU_ACCOUNTING
  32 static inline bool vtime_accounting_enabled(void) { return false; }
  33 #endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
  34
  35
  36 /*
  37  * Common vtime APIs
  38  */
  39 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
  40
  41 #ifdef __ARCH_HAS_VTIME_TASK_SWITCH
  42 extern void vtime_task_switch(struct task_struct *prev);
  43 #else
  44 extern void vtime_common_task_switch(struct task_struct *prev);
  45 static inline void vtime_task_switch(struct task_struct *prev)
  46 {
  47         if (vtime_accounting_enabled())
  48                 vtime_common_task_switch(prev);
  49 }
  50 #endif /* __ARCH_HAS_VTIME_TASK_SWITCH */
  51
  52 extern void vtime_account_system(struct task_struct *tsk);
  53 extern void vtime_account_idle(struct task_struct *tsk);
  54 extern void vtime_account_user(struct task_struct *tsk);
  55
  56 #ifdef __ARCH_HAS_VTIME_ACCOUNT
  57 extern void vtime_account_irq_enter(struct task_struct *tsk);
  58 #else
  59 extern void vtime_common_account_irq_enter(struct task_struct *tsk);
  60 static inline void vtime_account_irq_enter(struct task_struct *tsk)
  61 {
  62         if (vtime_accounting_enabled())
  63                 vtime_common_account_irq_enter(tsk);
  64 }
  65 #endif /* __ARCH_HAS_VTIME_ACCOUNT */
  66
  67 #else /* !CONFIG_VIRT_CPU_ACCOUNTING */
  68
  69 static inline void vtime_task_switch(struct task_struct *prev) { }
  70 static inline void vtime_account_system(struct task_struct *tsk) { }
  71 static inline void vtime_account_user(struct task_struct *tsk) { }
  72 static inline void vtime_account_irq_enter(struct task_struct *tsk) { }
  73 #endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
  74
  75 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
  76 extern void arch_vtime_task_switch(struct task_struct *tsk);
  77 extern void vtime_gen_account_irq_exit(struct task_struct *tsk);
  78
  79 static inline void vtime_account_irq_exit(struct task_struct *tsk)
  80 {
  81         if (vtime_accounting_enabled())
  82                 vtime_gen_account_irq_exit(tsk);
  83 }
  84
  85 extern void vtime_user_enter(struct task_struct *tsk);
  86
  87 static inline void vtime_user_exit(struct task_struct *tsk)
  88 {
  89         vtime_account_user(tsk);
  90 }
  91 extern void vtime_guest_enter(struct task_struct *tsk);
  92 extern void vtime_guest_exit(struct task_struct *tsk);
  93 extern void vtime_init_idle(struct task_struct *tsk, int cpu);
  94 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN  */
  95 static inline void vtime_account_irq_exit(struct task_struct *tsk)
  96 {
  97         /* On hard|softirq exit we always account to hard|softirq cputime */
  98         vtime_account_system(tsk);
  99 }
 100 static inline void vtime_user_enter(struct task_struct *tsk) { }
 101 static inline void vtime_user_exit(struct task_struct *tsk) { }
 102 static inline void vtime_guest_enter(struct task_struct *tsk) { }
 103 static inline void vtime_guest_exit(struct task_struct *tsk) { }
 104 static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { }
 105 #endif
 106
 107 #ifdef CONFIG_IRQ_TIME_ACCOUNTING
 108 extern void irqtime_account_irq(struct task_struct *tsk);
 109 #else
 110 static inline void irqtime_account_irq(struct task_struct *tsk) { }
 111 #endif
 112
 113 static inline void account_irq_enter_time(struct task_struct *tsk)
 114 {
 115         vtime_account_irq_enter(tsk);
 116         irqtime_account_irq(tsk);
 117 }
 118
 119 static inline void account_irq_exit_time(struct task_struct *tsk)
 120 {
 121         vtime_account_irq_exit(tsk);
 122         irqtime_account_irq(tsk);
 123 }
 124
 125 #endif /* _LINUX_KERNEL_VTIME_H */