include/linux/vtime.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_KERNEL_VTIME_H
   3 #define _LINUX_KERNEL_VTIME_H
   4
   5 #include <linux/context_tracking_state.h>
   6 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
   7 #include <asm/vtime.h>
   8 #endif
   9
  10
  11 struct task_struct;
  12
  13 /*
  14  * vtime_accounting_enabled_this_cpu() definitions/declarations
  15  */
  16 #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE)
  17
  18 static inline bool vtime_accounting_enabled_this_cpu(void) { return true; }
  19 extern void vtime_task_switch(struct task_struct *prev);
  20
  21 #elif defined(CONFIG_VIRT_CPU_ACCOUNTING_GEN)
  22
  23 /*
  24  * Checks if vtime is enabled on some CPU. Cputime readers want to be careful
  25  * in that case and compute the tickless cputime.
  26  * For now vtime state is tied to context tracking. We might want to decouple
  27  * those later if necessary.
  28  */
  29 static inline bool vtime_accounting_enabled(void)
  30 {
  31         return context_tracking_enabled();
  32 }
  33
  34 static inline bool vtime_accounting_enabled_cpu(int cpu)
  35 {
  36         return context_tracking_enabled_cpu(cpu);
  37 }
  38
  39 static inline bool vtime_accounting_enabled_this_cpu(void)
  40 {
  41         return context_tracking_enabled_this_cpu();
  42 }
  43
  44 extern void vtime_task_switch_generic(struct task_struct *prev);
  45
  46 static inline void vtime_task_switch(struct task_struct *prev)
  47 {
  48         if (vtime_accounting_enabled_this_cpu())
  49                 vtime_task_switch_generic(prev);
  50 }
  51
  52 #else /* !CONFIG_VIRT_CPU_ACCOUNTING */
  53
  54 static inline bool vtime_accounting_enabled_cpu(int cpu) {return false; }
  55 static inline bool vtime_accounting_enabled_this_cpu(void) { return false; }
  56 static inline void vtime_task_switch(struct task_struct *prev) { }
  57
  58 #endif
  59
  60 /*
  61  * Common vtime APIs
  62  */
  63 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
  64 extern void vtime_account_kernel(struct task_struct *tsk);
  65 extern void vtime_account_idle(struct task_struct *tsk);
  66 #else /* !CONFIG_VIRT_CPU_ACCOUNTING */
  67 static inline void vtime_account_kernel(struct task_struct *tsk) { }
  68 #endif /* !CONFIG_VIRT_CPU_ACCOUNTING */
  69
  70 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
  71 extern void arch_vtime_task_switch(struct task_struct *tsk);
  72 extern void vtime_user_enter(struct task_struct *tsk);
  73 extern void vtime_user_exit(struct task_struct *tsk);
  74 extern void vtime_guest_enter(struct task_struct *tsk);
  75 extern void vtime_guest_exit(struct task_struct *tsk);
  76 extern void vtime_init_idle(struct task_struct *tsk, int cpu);
  77 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN  */
  78 static inline void vtime_user_enter(struct task_struct *tsk) { }
  79 static inline void vtime_user_exit(struct task_struct *tsk) { }
  80 static inline void vtime_guest_enter(struct task_struct *tsk) { }
  81 static inline void vtime_guest_exit(struct task_struct *tsk) { }
  82 static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { }
  83 #endif
  84
  85 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  86 extern void vtime_account_irq(struct task_struct *tsk, unsigned int offset);
  87 extern void vtime_account_softirq(struct task_struct *tsk);
  88 extern void vtime_account_hardirq(struct task_struct *tsk);
  89 extern void vtime_flush(struct task_struct *tsk);
  90 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
  91 static inline void vtime_account_irq(struct task_struct *tsk, unsigned int offset) { }
  92 static inline void vtime_account_softirq(struct task_struct *tsk) { }
  93 static inline void vtime_account_hardirq(struct task_struct *tsk) { }
  94 static inline void vtime_flush(struct task_struct *tsk) { }
  95 #endif
  96
  97
  98 #ifdef CONFIG_IRQ_TIME_ACCOUNTING
  99 extern void irqtime_account_irq(struct task_struct *tsk, unsigned int offset);
 100 #else
 101 static inline void irqtime_account_irq(struct task_struct *tsk, unsigned int offset) { }
 102 #endif
 103
 104 static inline void account_softirq_enter(struct task_struct *tsk)
 105 {
 106         vtime_account_irq(tsk, SOFTIRQ_OFFSET);
 107         irqtime_account_irq(tsk, SOFTIRQ_OFFSET);
 108 }
 109
 110 static inline void account_softirq_exit(struct task_struct *tsk)
 111 {
 112         vtime_account_softirq(tsk);
 113         irqtime_account_irq(tsk, 0);
 114 }
 115
 116 static inline void account_hardirq_enter(struct task_struct *tsk)
 117 {
 118         vtime_account_irq(tsk, HARDIRQ_OFFSET);
 119         irqtime_account_irq(tsk, HARDIRQ_OFFSET);
 120 }
 121
 122 static inline void account_hardirq_exit(struct task_struct *tsk)
 123 {
 124         vtime_account_hardirq(tsk);
 125         irqtime_account_irq(tsk, 0);
 126 }
 127
 128 #endif /* _LINUX_KERNEL_VTIME_H */