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_cpu_enabled() definitions/declarations 14 */ 15 #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) 16 static inline bool vtime_accounting_cpu_enabled(void) { return true; } 17 #elif defined(CONFIG_VIRT_CPU_ACCOUNTING_GEN) 18 /* 19 * Checks if vtime is enabled on some CPU. Cputime readers want to be careful 20 * in that case and compute the tickless cputime. 21 * For now vtime state is tied to context tracking. We might want to decouple 22 * those later if necessary. 23 */ 24 static inline bool vtime_accounting_enabled(void) 25 { 26 return context_tracking_is_enabled(); 27 } 28 29 static inline bool vtime_accounting_cpu_enabled(void) 30 { 31 if (vtime_accounting_enabled()) { 32 if (context_tracking_cpu_is_enabled()) 33 return true; 34 } 35 36 return false; 37 } 38 #else /* !CONFIG_VIRT_CPU_ACCOUNTING */ 39 static inline bool vtime_accounting_cpu_enabled(void) { return false; } 40 #endif 41 42 43 /* 44 * Common vtime APIs 45 */ 46 #ifdef CONFIG_VIRT_CPU_ACCOUNTING 47 48 #ifdef __ARCH_HAS_VTIME_TASK_SWITCH 49 extern void vtime_task_switch(struct task_struct *prev); 50 #else 51 extern void vtime_common_task_switch(struct task_struct *prev); 52 static inline void vtime_task_switch(struct task_struct *prev) 53 { 54 if (vtime_accounting_cpu_enabled()) 55 vtime_common_task_switch(prev); 56 } 57 #endif /* __ARCH_HAS_VTIME_TASK_SWITCH */ 58 59 extern void vtime_account_system(struct task_struct *tsk); 60 extern void vtime_account_idle(struct task_struct *tsk); 61 62 #else /* !CONFIG_VIRT_CPU_ACCOUNTING */ 63 64 static inline void vtime_task_switch(struct task_struct *prev) { } 65 static inline void vtime_account_system(struct task_struct *tsk) { } 66 #endif /* !CONFIG_VIRT_CPU_ACCOUNTING */ 67 68 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 69 extern void arch_vtime_task_switch(struct task_struct *tsk); 70 extern void vtime_account_user(struct task_struct *tsk); 71 extern void vtime_user_enter(struct task_struct *tsk); 72 73 static inline void vtime_user_exit(struct task_struct *tsk) 74 { 75 vtime_account_user(tsk); 76 } 77 78 extern void vtime_guest_enter(struct task_struct *tsk); 79 extern void vtime_guest_exit(struct task_struct *tsk); 80 extern void vtime_init_idle(struct task_struct *tsk, int cpu); 81 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */ 82 static inline void vtime_account_user(struct task_struct *tsk) { } 83 static inline void vtime_user_enter(struct task_struct *tsk) { } 84 static inline void vtime_user_exit(struct task_struct *tsk) { } 85 static inline void vtime_guest_enter(struct task_struct *tsk) { } 86 static inline void vtime_guest_exit(struct task_struct *tsk) { } 87 static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { } 88 #endif 89 90 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 91 extern void vtime_account_irq_enter(struct task_struct *tsk); 92 static inline void vtime_account_irq_exit(struct task_struct *tsk) 93 { 94 /* On hard|softirq exit we always account to hard|softirq cputime */ 95 vtime_account_system(tsk); 96 } 97 extern void vtime_flush(struct task_struct *tsk); 98 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ 99 static inline void vtime_account_irq_enter(struct task_struct *tsk) { } 100 static inline void vtime_account_irq_exit(struct task_struct *tsk) { } 101 static inline void vtime_flush(struct task_struct *tsk) { } 102 #endif 103 104 105 #ifdef CONFIG_IRQ_TIME_ACCOUNTING 106 extern void irqtime_account_irq(struct task_struct *tsk); 107 #else 108 static inline void irqtime_account_irq(struct task_struct *tsk) { } 109 #endif 110 111 static inline void account_irq_enter_time(struct task_struct *tsk) 112 { 113 vtime_account_irq_enter(tsk); 114 irqtime_account_irq(tsk); 115 } 116 117 static inline void account_irq_exit_time(struct task_struct *tsk) 118 { 119 vtime_account_irq_exit(tsk); 120 irqtime_account_irq(tsk); 121 } 122 123 #endif /* _LINUX_KERNEL_VTIME_H */ 124