LXR linux/include/linux/sched/isolation.h

   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) { }
  49static inline void housekeeping_init(void) { }
  50#endif /* CONFIG_CPU_ISOLATION */
  51
  52static inline bool housekeeping_cpu(int cpu, enum hk_type type)
  53{
  54#ifdef CONFIG_CPU_ISOLATION
  55        if (static_branch_unlikely(&housekeeping_overridden))
  56                return housekeeping_test_cpu(cpu, type);
  57#endif
  58        return true;
  59}
  60
  61#endif /* _LINUX_SCHED_ISOLATION_H */
  62