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 */ 126