Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _LINUX_SCHED_ISOLATION_H
2#define _LINUX_SCHED_ISOLATION_H
3
4#include <linux/cpumask.h>
5#include <linux/init.h>
6#include <linux/tick.h>
7
8enum hk_type {
9 HK_TYPE_TIMER,
10 HK_TYPE_RCU,
11 HK_TYPE_MISC,
12 HK_TYPE_SCHED,
13 HK_TYPE_TICK,
14 HK_TYPE_DOMAIN,
15 HK_TYPE_WQ,
16 HK_TYPE_MANAGED_IRQ,
17 HK_TYPE_KTHREAD,
18 HK_TYPE_MAX
19};
20
21#ifdef CONFIG_CPU_ISOLATION
22DECLARE_STATIC_KEY_FALSE(housekeeping_overridden);
23extern int housekeeping_any_cpu(enum hk_type type);
24extern const struct cpumask *housekeeping_cpumask(enum hk_type type);
25extern bool housekeeping_enabled(enum hk_type type);
26extern void housekeeping_affine(struct task_struct *t, enum hk_type type);
27extern bool housekeeping_test_cpu(int cpu, enum hk_type type);
28extern void __init housekeeping_init(void);
29
30#else
31
32static inline int housekeeping_any_cpu(enum hk_type type)
33{
34 return smp_processor_id();
35}
36
37static inline const struct cpumask *housekeeping_cpumask(enum hk_type type)
38{
39 return cpu_possible_mask;
40}
41
42static inline bool housekeeping_enabled(enum hk_type type)
43{
44 return false;
45}
46
47static inline void housekeeping_affine(struct task_struct *t,
48 enum hk_type type) { }
49
50static inline bool housekeeping_test_cpu(int cpu, enum hk_type type)
51{
52 return true;
53}
54
55static inline void housekeeping_init(void) { }
56#endif /* CONFIG_CPU_ISOLATION */
57
58static inline bool housekeeping_cpu(int cpu, enum hk_type type)
59{
60#ifdef CONFIG_CPU_ISOLATION
61 if (static_branch_unlikely(&housekeeping_overridden))
62 return housekeeping_test_cpu(cpu, type);
63#endif
64 return true;
65}
66
67static inline bool cpu_is_isolated(int cpu)
68{
69 return !housekeeping_test_cpu(cpu, HK_TYPE_DOMAIN) ||
70 !housekeeping_test_cpu(cpu, HK_TYPE_TICK);
71}
72
73#endif /* _LINUX_SCHED_ISOLATION_H */