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dcbf832e FW |
1 | #ifndef _LINUX_KERNEL_VTIME_H |
2 | #define _LINUX_KERNEL_VTIME_H | |
3 | ||
b0493406 | 4 | #include <linux/context_tracking_state.h> |
a5725ac2 FW |
5 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE |
6 | #include <asm/vtime.h> | |
7 | #endif | |
8 | ||
b0493406 | 9 | |
dcbf832e FW |
10 | struct task_struct; |
11 | ||
b0493406 | 12 | /* |
55dbdcfa | 13 | * vtime_accounting_cpu_enabled() definitions/declarations |
b0493406 | 14 | */ |
8612f17a | 15 | #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) |
55dbdcfa | 16 | static inline bool vtime_accounting_cpu_enabled(void) { return true; } |
8612f17a | 17 | #elif defined(CONFIG_VIRT_CPU_ACCOUNTING_GEN) |
e5925394 FW |
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 | ||
55dbdcfa | 29 | static inline bool vtime_accounting_cpu_enabled(void) |
b0493406 | 30 | { |
e5925394 | 31 | if (vtime_accounting_enabled()) { |
d0df09eb | 32 | if (context_tracking_cpu_is_enabled()) |
b0493406 FW |
33 | return true; |
34 | } | |
35 | ||
36 | return false; | |
37 | } | |
8612f17a | 38 | #else /* !CONFIG_VIRT_CPU_ACCOUNTING */ |
55dbdcfa | 39 | static inline bool vtime_accounting_cpu_enabled(void) { return false; } |
8612f17a | 40 | #endif |
b0493406 FW |
41 | |
42 | ||
43 | /* | |
44 | * Common vtime APIs | |
45 | */ | |
dcbf832e | 46 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
b0493406 FW |
47 | |
48 | #ifdef __ARCH_HAS_VTIME_TASK_SWITCH | |
dcbf832e | 49 | extern void vtime_task_switch(struct task_struct *prev); |
b0493406 FW |
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 | { | |
55dbdcfa | 54 | if (vtime_accounting_cpu_enabled()) |
b0493406 FW |
55 | vtime_common_task_switch(prev); |
56 | } | |
57 | #endif /* __ARCH_HAS_VTIME_TASK_SWITCH */ | |
58 | ||
dcbf832e | 59 | extern void vtime_account_system(struct task_struct *tsk); |
fd25b4c2 | 60 | extern void vtime_account_idle(struct task_struct *tsk); |
3f4724ea | 61 | |
3f4724ea | 62 | #else /* !CONFIG_VIRT_CPU_ACCOUNTING */ |
6a61671b | 63 | |
dcbf832e | 64 | static inline void vtime_task_switch(struct task_struct *prev) { } |
11113334 | 65 | static inline void vtime_account_system(struct task_struct *tsk) { } |
b0493406 | 66 | #endif /* !CONFIG_VIRT_CPU_ACCOUNTING */ |
abf917cd FW |
67 | |
68 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN | |
6a61671b | 69 | extern void arch_vtime_task_switch(struct task_struct *tsk); |
c8d7dabf | 70 | extern void vtime_account_user(struct task_struct *tsk); |
6a61671b | 71 | extern void vtime_user_enter(struct task_struct *tsk); |
b0493406 | 72 | |
abf917cd FW |
73 | static inline void vtime_user_exit(struct task_struct *tsk) |
74 | { | |
75 | vtime_account_user(tsk); | |
76 | } | |
c8d7dabf | 77 | |
6a61671b FW |
78 | extern void vtime_guest_enter(struct task_struct *tsk); |
79 | extern void vtime_guest_exit(struct task_struct *tsk); | |
45eacc69 | 80 | extern void vtime_init_idle(struct task_struct *tsk, int cpu); |
b0493406 | 81 | #else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */ |
c8d7dabf | 82 | static inline void vtime_account_user(struct task_struct *tsk) { } |
abf917cd FW |
83 | static inline void vtime_user_enter(struct task_struct *tsk) { } |
84 | static inline void vtime_user_exit(struct task_struct *tsk) { } | |
6a61671b FW |
85 | static inline void vtime_guest_enter(struct task_struct *tsk) { } |
86 | static inline void vtime_guest_exit(struct task_struct *tsk) { } | |
45eacc69 | 87 | static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { } |
dcbf832e FW |
88 | #endif |
89 | ||
8612f17a FW |
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 | } | |
c8d7dabf | 97 | extern void vtime_flush(struct task_struct *tsk); |
8612f17a FW |
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) { } | |
c8d7dabf | 101 | static inline void vtime_flush(struct task_struct *tsk) { } |
8612f17a FW |
102 | #endif |
103 | ||
104 | ||
3e1df4f5 FW |
105 | #ifdef CONFIG_IRQ_TIME_ACCOUNTING |
106 | extern void irqtime_account_irq(struct task_struct *tsk); | |
dcbf832e | 107 | #else |
3e1df4f5 | 108 | static inline void irqtime_account_irq(struct task_struct *tsk) { } |
dcbf832e FW |
109 | #endif |
110 | ||
6a61671b | 111 | static inline void account_irq_enter_time(struct task_struct *tsk) |
fa5058f3 | 112 | { |
6a61671b | 113 | vtime_account_irq_enter(tsk); |
3e1df4f5 | 114 | irqtime_account_irq(tsk); |
fa5058f3 FW |
115 | } |
116 | ||
6a61671b | 117 | static inline void account_irq_exit_time(struct task_struct *tsk) |
fa5058f3 | 118 | { |
6a61671b | 119 | vtime_account_irq_exit(tsk); |
3e1df4f5 | 120 | irqtime_account_irq(tsk); |
fa5058f3 FW |
121 | } |
122 | ||
dcbf832e | 123 | #endif /* _LINUX_KERNEL_VTIME_H */ |