| | 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 */ |
projects / linux-2.6-block.git / blame_incremental