Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 1 | #ifndef _LINUX_KERNEL_VTIME_H |
| 2 | #define _LINUX_KERNEL_VTIME_H |
| 3 | |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 4 | #include <linux/context_tracking_state.h> |
Frederic Weisbecker | a5725ac | 2013-07-16 18:50:52 +0200 | [diff] [blame] | 5 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE |
| 6 | #include <asm/vtime.h> |
| 7 | #endif |
| 8 | |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 9 | |
Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 10 | struct task_struct; |
| 11 | |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 12 | /* |
Frederic Weisbecker | 55dbdcf | 2015-11-19 16:47:32 +0100 | [diff] [blame] | 13 | * vtime_accounting_cpu_enabled() definitions/declarations |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 14 | */ |
Frederic Weisbecker | 8612f17 | 2016-07-13 16:50:04 +0200 | [diff] [blame] | 15 | #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) |
Frederic Weisbecker | 55dbdcf | 2015-11-19 16:47:32 +0100 | [diff] [blame] | 16 | static inline bool vtime_accounting_cpu_enabled(void) { return true; } |
Frederic Weisbecker | 8612f17 | 2016-07-13 16:50:04 +0200 | [diff] [blame] | 17 | #elif defined(CONFIG_VIRT_CPU_ACCOUNTING_GEN) |
Frederic Weisbecker | e592539 | 2015-11-19 16:47:33 +0100 | [diff] [blame] | 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 | |
Frederic Weisbecker | 55dbdcf | 2015-11-19 16:47:32 +0100 | [diff] [blame] | 29 | static inline bool vtime_accounting_cpu_enabled(void) |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 30 | { |
Frederic Weisbecker | e592539 | 2015-11-19 16:47:33 +0100 | [diff] [blame] | 31 | if (vtime_accounting_enabled()) { |
Frederic Weisbecker | d0df09e | 2013-11-06 15:11:57 +0100 | [diff] [blame] | 32 | if (context_tracking_cpu_is_enabled()) |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 33 | return true; |
| 34 | } |
| 35 | |
| 36 | return false; |
| 37 | } |
Frederic Weisbecker | 8612f17 | 2016-07-13 16:50:04 +0200 | [diff] [blame] | 38 | #else /* !CONFIG_VIRT_CPU_ACCOUNTING */ |
Frederic Weisbecker | 55dbdcf | 2015-11-19 16:47:32 +0100 | [diff] [blame] | 39 | static inline bool vtime_accounting_cpu_enabled(void) { return false; } |
Frederic Weisbecker | 8612f17 | 2016-07-13 16:50:04 +0200 | [diff] [blame] | 40 | #endif |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 41 | |
| 42 | |
| 43 | /* |
| 44 | * Common vtime APIs |
| 45 | */ |
Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 46 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 47 | |
| 48 | #ifdef __ARCH_HAS_VTIME_TASK_SWITCH |
Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 49 | extern void vtime_task_switch(struct task_struct *prev); |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 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 | { |
Frederic Weisbecker | 55dbdcf | 2015-11-19 16:47:32 +0100 | [diff] [blame] | 54 | if (vtime_accounting_cpu_enabled()) |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 55 | vtime_common_task_switch(prev); |
| 56 | } |
| 57 | #endif /* __ARCH_HAS_VTIME_TASK_SWITCH */ |
| 58 | |
Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 59 | extern void vtime_account_system(struct task_struct *tsk); |
Frederic Weisbecker | fd25b4c | 2012-11-13 18:21:22 +0100 | [diff] [blame] | 60 | extern void vtime_account_idle(struct task_struct *tsk); |
Frederic Weisbecker | bcebdf8 | 2012-11-13 23:51:06 +0100 | [diff] [blame] | 61 | extern void vtime_account_user(struct task_struct *tsk); |
Frederic Weisbecker | 3f4724e | 2012-07-16 18:00:34 +0200 | [diff] [blame] | 62 | |
Frederic Weisbecker | 3f4724e | 2012-07-16 18:00:34 +0200 | [diff] [blame] | 63 | #else /* !CONFIG_VIRT_CPU_ACCOUNTING */ |
Frederic Weisbecker | 6a61671 | 2012-12-16 20:00:34 +0100 | [diff] [blame] | 64 | |
Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 65 | static inline void vtime_task_switch(struct task_struct *prev) { } |
Frederic Weisbecker | 1111333 | 2012-10-24 18:05:51 +0200 | [diff] [blame] | 66 | static inline void vtime_account_system(struct task_struct *tsk) { } |
Frederic Weisbecker | abf917c | 2012-07-25 07:56:04 +0200 | [diff] [blame] | 67 | static inline void vtime_account_user(struct task_struct *tsk) { } |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 68 | #endif /* !CONFIG_VIRT_CPU_ACCOUNTING */ |
Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 69 | |
Frederic Weisbecker | abf917c | 2012-07-25 07:56:04 +0200 | [diff] [blame] | 70 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN |
Frederic Weisbecker | 6a61671 | 2012-12-16 20:00:34 +0100 | [diff] [blame] | 71 | extern void arch_vtime_task_switch(struct task_struct *tsk); |
Frederic Weisbecker | 6a61671 | 2012-12-16 20:00:34 +0100 | [diff] [blame] | 72 | extern void vtime_user_enter(struct task_struct *tsk); |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 73 | |
Frederic Weisbecker | abf917c | 2012-07-25 07:56:04 +0200 | [diff] [blame] | 74 | static inline void vtime_user_exit(struct task_struct *tsk) |
| 75 | { |
| 76 | vtime_account_user(tsk); |
| 77 | } |
Frederic Weisbecker | 6a61671 | 2012-12-16 20:00:34 +0100 | [diff] [blame] | 78 | extern void vtime_guest_enter(struct task_struct *tsk); |
| 79 | extern void vtime_guest_exit(struct task_struct *tsk); |
Frederic Weisbecker | 45eacc6 | 2013-05-15 22:16:32 +0200 | [diff] [blame] | 80 | extern void vtime_init_idle(struct task_struct *tsk, int cpu); |
Frederic Weisbecker | b049340 | 2013-07-12 03:10:15 +0200 | [diff] [blame] | 81 | #else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */ |
Frederic Weisbecker | abf917c | 2012-07-25 07:56:04 +0200 | [diff] [blame] | 82 | static inline void vtime_user_enter(struct task_struct *tsk) { } |
| 83 | static inline void vtime_user_exit(struct task_struct *tsk) { } |
Frederic Weisbecker | 6a61671 | 2012-12-16 20:00:34 +0100 | [diff] [blame] | 84 | static inline void vtime_guest_enter(struct task_struct *tsk) { } |
| 85 | static inline void vtime_guest_exit(struct task_struct *tsk) { } |
Frederic Weisbecker | 45eacc6 | 2013-05-15 22:16:32 +0200 | [diff] [blame] | 86 | static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { } |
Frederic Weisbecker | abf917c | 2012-07-25 07:56:04 +0200 | [diff] [blame] | 87 | #endif |
| 88 | |
Frederic Weisbecker | 8612f17 | 2016-07-13 16:50:04 +0200 | [diff] [blame] | 89 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE |
| 90 | extern void vtime_account_irq_enter(struct task_struct *tsk); |
| 91 | static 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 */ |
| 97 | static inline void vtime_account_irq_enter(struct task_struct *tsk) { } |
| 98 | static inline void vtime_account_irq_exit(struct task_struct *tsk) { } |
| 99 | #endif |
| 100 | |
| 101 | |
Frederic Weisbecker | 3e1df4f5 | 2012-10-06 05:23:22 +0200 | [diff] [blame] | 102 | #ifdef CONFIG_IRQ_TIME_ACCOUNTING |
| 103 | extern void irqtime_account_irq(struct task_struct *tsk); |
Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 104 | #else |
Frederic Weisbecker | 3e1df4f5 | 2012-10-06 05:23:22 +0200 | [diff] [blame] | 105 | static inline void irqtime_account_irq(struct task_struct *tsk) { } |
Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 106 | #endif |
| 107 | |
Frederic Weisbecker | 6a61671 | 2012-12-16 20:00:34 +0100 | [diff] [blame] | 108 | static inline void account_irq_enter_time(struct task_struct *tsk) |
Frederic Weisbecker | fa5058f | 2012-10-06 04:07:19 +0200 | [diff] [blame] | 109 | { |
Frederic Weisbecker | 6a61671 | 2012-12-16 20:00:34 +0100 | [diff] [blame] | 110 | vtime_account_irq_enter(tsk); |
Frederic Weisbecker | 3e1df4f5 | 2012-10-06 05:23:22 +0200 | [diff] [blame] | 111 | irqtime_account_irq(tsk); |
Frederic Weisbecker | fa5058f | 2012-10-06 04:07:19 +0200 | [diff] [blame] | 112 | } |
| 113 | |
Frederic Weisbecker | 6a61671 | 2012-12-16 20:00:34 +0100 | [diff] [blame] | 114 | static inline void account_irq_exit_time(struct task_struct *tsk) |
Frederic Weisbecker | fa5058f | 2012-10-06 04:07:19 +0200 | [diff] [blame] | 115 | { |
Frederic Weisbecker | 6a61671 | 2012-12-16 20:00:34 +0100 | [diff] [blame] | 116 | vtime_account_irq_exit(tsk); |
Frederic Weisbecker | 3e1df4f5 | 2012-10-06 05:23:22 +0200 | [diff] [blame] | 117 | irqtime_account_irq(tsk); |
Frederic Weisbecker | fa5058f | 2012-10-06 04:07:19 +0200 | [diff] [blame] | 118 | } |
| 119 | |
Frederic Weisbecker | dcbf832 | 2012-10-05 23:07:19 +0200 | [diff] [blame] | 120 | #endif /* _LINUX_KERNEL_VTIME_H */ |