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_flags {
9 HK_FLAG_TIMER = 1,
10 HK_FLAG_RCU = (1 << 1),
11 HK_FLAG_MISC = (1 << 2),
12 HK_FLAG_SCHED = (1 << 3),
13 HK_FLAG_TICK = (1 << 4),
14 HK_FLAG_DOMAIN = (1 << 5),
15 HK_FLAG_WQ = (1 << 6),
16 HK_FLAG_MANAGED_IRQ = (1 << 7),
17};
18
19#ifdef CONFIG_CPU_ISOLATION
20DECLARE_STATIC_KEY_FALSE(housekeeping_overridden);
21extern int housekeeping_any_cpu(enum hk_flags flags);
22extern const struct cpumask *housekeeping_cpumask(enum hk_flags flags);
23extern bool housekeeping_enabled(enum hk_flags flags);
24extern void housekeeping_affine(struct task_struct *t, enum hk_flags flags);
25extern bool housekeeping_test_cpu(int cpu, enum hk_flags flags);
26extern void __init housekeeping_init(void);
27
28#else
29
30static inline int housekeeping_any_cpu(enum hk_flags flags)
31{
32 return smp_processor_id();
33}
34
35static inline const struct cpumask *housekeeping_cpumask(enum hk_flags flags)
36{
37 return cpu_possible_mask;
38}
39
40static inline bool housekeeping_enabled(enum hk_flags flags)
41{
42 return false;
43}
44
45static inline void housekeeping_affine(struct task_struct *t,
46 enum hk_flags flags) { }
47static inline void housekeeping_init(void) { }
48#endif /* CONFIG_CPU_ISOLATION */
49
50static inline bool housekeeping_cpu(int cpu, enum hk_flags flags)
51{
52#ifdef CONFIG_CPU_ISOLATION
53 if (static_branch_unlikely(&housekeeping_overridden))
54 return housekeeping_test_cpu(cpu, flags);
55#endif
56 return true;
57}
58
59#endif /* _LINUX_SCHED_ISOLATION_H */