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) vtime_accounting_cpu_enabled(void)16static 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 */ vtime_accounting_enabled(void)24static inline bool vtime_accounting_enabled(void) 25 { 26 return context_tracking_is_enabled(); 27 } 28 vtime_accounting_cpu_enabled(void)29static 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 */ vtime_accounting_cpu_enabled(void)39static 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); vtime_task_switch(struct task_struct * prev)52static 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 extern void vtime_account_user(struct task_struct *tsk); 62 63 #else /* !CONFIG_VIRT_CPU_ACCOUNTING */ 64 vtime_task_switch(struct task_struct * prev)65static inline void vtime_task_switch(struct task_struct *prev) { } vtime_account_system(struct task_struct * tsk)66static inline void vtime_account_system(struct task_struct *tsk) { } vtime_account_user(struct task_struct * tsk)67static inline void vtime_account_user(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 vtime_user_exit(struct task_struct * tsk)74static inline void vtime_user_exit(struct task_struct *tsk) 75 { 76 vtime_account_user(tsk); 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 */ vtime_user_enter(struct task_struct * tsk)82static inline void vtime_user_enter(struct task_struct *tsk) { } vtime_user_exit(struct task_struct * tsk)83static inline void vtime_user_exit(struct task_struct *tsk) { } vtime_guest_enter(struct task_struct * tsk)84static inline void vtime_guest_enter(struct task_struct *tsk) { } vtime_guest_exit(struct task_struct * tsk)85static inline void vtime_guest_exit(struct task_struct *tsk) { } vtime_init_idle(struct task_struct * tsk,int cpu)86static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { } 87 #endif 88 89 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 90 extern void vtime_account_irq_enter(struct task_struct *tsk); vtime_account_irq_exit(struct task_struct * tsk)91static inline void vtime_account_irq_exit(struct task_struct *tsk) 92 { 93 /* On hard|softirq exit we always account to hard|softirq cputime */ 94 vtime_account_system(tsk); 95 } 96 #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ vtime_account_irq_enter(struct task_struct * tsk)97static inline void vtime_account_irq_enter(struct task_struct *tsk) { } vtime_account_irq_exit(struct task_struct * tsk)98static inline void vtime_account_irq_exit(struct task_struct *tsk) { } 99 #endif 100 101 102 #ifdef CONFIG_IRQ_TIME_ACCOUNTING 103 extern void irqtime_account_irq(struct task_struct *tsk); 104 #else irqtime_account_irq(struct task_struct * tsk)105static inline void irqtime_account_irq(struct task_struct *tsk) { } 106 #endif 107 account_irq_enter_time(struct task_struct * tsk)108static inline void account_irq_enter_time(struct task_struct *tsk) 109 { 110 vtime_account_irq_enter(tsk); 111 irqtime_account_irq(tsk); 112 } 113 account_irq_exit_time(struct task_struct * tsk)114static inline void account_irq_exit_time(struct task_struct *tsk) 115 { 116 vtime_account_irq_exit(tsk); 117 irqtime_account_irq(tsk); 118 } 119 120 #endif /* _LINUX_KERNEL_VTIME_H */ 121