summaryrefslogtreecommitdiff
path: root/include/linux/vtime.h
blob: 29dd5b91dd7d6684ae4f9092e3a6c8566ef3dd3e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_KERNEL_VTIME_H
#define _LINUX_KERNEL_VTIME_H

#include <linux/context_tracking_state.h>
#include <linux/sched.h>

/*
 * Common vtime APIs
 */
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
extern void vtime_account_kernel(struct task_struct *tsk);
extern void vtime_account_idle(struct task_struct *tsk);
#endif /* !CONFIG_VIRT_CPU_ACCOUNTING */

#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
extern void vtime_user_enter(struct task_struct *tsk);
extern void vtime_user_exit(struct task_struct *tsk);
extern void vtime_guest_enter(struct task_struct *tsk);
extern void vtime_guest_exit(struct task_struct *tsk);
extern void vtime_init_idle(struct task_struct *tsk, int cpu);
#else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN  */
static inline void vtime_user_enter(struct task_struct *tsk) { }
static inline void vtime_user_exit(struct task_struct *tsk) { }
static inline void vtime_guest_enter(struct task_struct *tsk) { }
static inline void vtime_guest_exit(struct task_struct *tsk) { }
static inline void vtime_init_idle(struct task_struct *tsk, int cpu) { }
#endif

#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
extern void vtime_account_irq(struct task_struct *tsk, unsigned int offset);
extern void vtime_account_softirq(struct task_struct *tsk);
extern void vtime_account_hardirq(struct task_struct *tsk);
extern void vtime_flush(struct task_struct *tsk);
#else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
static inline void vtime_account_irq(struct task_struct *tsk, unsigned int offset) { }
static inline void vtime_account_softirq(struct task_struct *tsk) { }
static inline void vtime_account_hardirq(struct task_struct *tsk) { }
static inline void vtime_flush(struct task_struct *tsk) { }
#endif

/*
 * vtime_accounting_enabled_this_cpu() definitions/declarations
 */
#if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE)

static inline bool vtime_accounting_enabled_this_cpu(void) { return true; }
extern void vtime_task_switch(struct task_struct *prev);

static __always_inline void vtime_account_guest_enter(void)
{
	vtime_account_kernel(current);
	current->flags |= PF_VCPU;
}

static __always_inline void vtime_account_guest_exit(void)
{
	vtime_account_kernel(current);
	current->flags &= ~PF_VCPU;
}

#elif defined(CONFIG_VIRT_CPU_ACCOUNTING_GEN)

/*
 * Checks if vtime is enabled on some CPU. Cputime readers want to be careful
 * in that case and compute the tickless cputime.
 * For now vtime state is tied to context tracking. We might want to decouple
 * those later if necessary.
 */
static inline bool vtime_accounting_enabled(void)
{
	return context_tracking_enabled();
}

static inline bool vtime_accounting_enabled_cpu(int cpu)
{
	return context_tracking_enabled_cpu(cpu);
}

static inline bool vtime_accounting_enabled_this_cpu(void)
{
	return context_tracking_enabled_this_cpu();
}

extern void vtime_task_switch_generic(struct task_struct *prev);

static inline void vtime_task_switch(struct task_struct *prev)
{
	if (vtime_accounting_enabled_this_cpu())
		vtime_task_switch_generic(prev);
}

static __always_inline void vtime_account_guest_enter(void)
{
	if (vtime_accounting_enabled_this_cpu())
		vtime_guest_enter(current);
	else
		current->flags |= PF_VCPU;
}

static __always_inline void vtime_account_guest_exit(void)
{
	if (vtime_accounting_enabled_this_cpu())
		vtime_guest_exit(current);
	else
		current->flags &= ~PF_VCPU;
}

#else /* !CONFIG_VIRT_CPU_ACCOUNTING */

static inline bool vtime_accounting_enabled_this_cpu(void) { return false; }
static inline void vtime_task_switch(struct task_struct *prev) { }

static __always_inline void vtime_account_guest_enter(void)
{
	current->flags |= PF_VCPU;
}

static __always_inline void vtime_account_guest_exit(void)
{
	current->flags &= ~PF_VCPU;
}

#endif


#ifdef CONFIG_IRQ_TIME_ACCOUNTING
extern void irqtime_account_irq(struct task_struct *tsk, unsigned int offset);
#else
static inline void irqtime_account_irq(struct task_struct *tsk, unsigned int offset) { }
#endif

static inline void account_softirq_enter(struct task_struct *tsk)
{
	vtime_account_irq(tsk, SOFTIRQ_OFFSET);
	irqtime_account_irq(tsk, SOFTIRQ_OFFSET);
}

static inline void account_softirq_exit(struct task_struct *tsk)
{
	vtime_account_softirq(tsk);
	irqtime_account_irq(tsk, 0);
}

static inline void account_hardirq_enter(struct task_struct *tsk)
{
	vtime_account_irq(tsk, HARDIRQ_OFFSET);
	irqtime_account_irq(tsk, HARDIRQ_OFFSET);
}

static inline void account_hardirq_exit(struct task_struct *tsk)
{
	vtime_account_hardirq(tsk);
	irqtime_account_irq(tsk, 0);
}

#endif /* _LINUX_KERNEL_VTIME_H */