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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()) |
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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); |
6a61671b | 70 | extern void vtime_user_enter(struct task_struct *tsk); |
1c3eda01 | 71 | extern void vtime_user_exit(struct task_struct *tsk); |
6a61671b FW |
72 | extern void vtime_guest_enter(struct task_struct *tsk); |
73 | extern void vtime_guest_exit(struct task_struct *tsk); | |
45eacc69 | 74 | extern void vtime_init_idle(struct task_struct *tsk, int cpu); |
b0493406 | 75 | #else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN */ |
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76 | static inline void vtime_user_enter(struct task_struct *tsk) { } |
77 | static inline void vtime_user_exit(struct task_struct *tsk) { } | |
6a61671b FW |
78 | static inline void vtime_guest_enter(struct task_struct *tsk) { } |
79 | static inline void vtime_guest_exit(struct task_struct *tsk) { } | |
45eacc69 | 80 | static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { } |
dcbf832e FW |
81 | #endif |
82 | ||
8612f17a FW |
83 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE |
84 | extern void vtime_account_irq_enter(struct task_struct *tsk); | |
85 | static inline void vtime_account_irq_exit(struct task_struct *tsk) | |
86 | { | |
87 | /* On hard|softirq exit we always account to hard|softirq cputime */ | |
88 | vtime_account_system(tsk); | |
89 | } | |
c8d7dabf | 90 | extern void vtime_flush(struct task_struct *tsk); |
8612f17a FW |
91 | #else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ |
92 | static inline void vtime_account_irq_enter(struct task_struct *tsk) { } | |
93 | static inline void vtime_account_irq_exit(struct task_struct *tsk) { } | |
c8d7dabf | 94 | static inline void vtime_flush(struct task_struct *tsk) { } |
8612f17a FW |
95 | #endif |
96 | ||
97 | ||
3e1df4f5 FW |
98 | #ifdef CONFIG_IRQ_TIME_ACCOUNTING |
99 | extern void irqtime_account_irq(struct task_struct *tsk); | |
dcbf832e | 100 | #else |
3e1df4f5 | 101 | static inline void irqtime_account_irq(struct task_struct *tsk) { } |
dcbf832e FW |
102 | #endif |
103 | ||
6a61671b | 104 | static inline void account_irq_enter_time(struct task_struct *tsk) |
fa5058f3 | 105 | { |
6a61671b | 106 | vtime_account_irq_enter(tsk); |
3e1df4f5 | 107 | irqtime_account_irq(tsk); |
fa5058f3 FW |
108 | } |
109 | ||
6a61671b | 110 | static inline void account_irq_exit_time(struct task_struct *tsk) |
fa5058f3 | 111 | { |
6a61671b | 112 | vtime_account_irq_exit(tsk); |
3e1df4f5 | 113 | irqtime_account_irq(tsk); |
fa5058f3 FW |
114 | } |
115 | ||
dcbf832e | 116 | #endif /* _LINUX_KERNEL_VTIME_H */ |