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#ifndef _LINUX_SCHED_ISOLATION_H
#define _LINUX_SCHED_ISOLATION_H
#include <linux/cpumask.h>
#include <linux/init.h>
#include <linux/tick.h>
enum hk_type {
HK_TYPE_TIMER,
HK_TYPE_RCU,
HK_TYPE_MISC,
HK_TYPE_SCHED,
HK_TYPE_TICK,
HK_TYPE_DOMAIN,
HK_TYPE_WQ,
HK_TYPE_MANAGED_IRQ,
HK_TYPE_KTHREAD,
HK_TYPE_MAX
};
#ifdef CONFIG_CPU_ISOLATION
DECLARE_STATIC_KEY_FALSE(housekeeping_overridden);
extern int housekeeping_any_cpu(enum hk_type type);
extern const struct cpumask *housekeeping_cpumask(enum hk_type type);
extern bool housekeeping_enabled(enum hk_type type);
extern void housekeeping_affine(struct task_struct *t, enum hk_type type);
extern bool housekeeping_test_cpu(int cpu, enum hk_type type);
extern void __init housekeeping_init(void);
#else
static inline int housekeeping_any_cpu(enum hk_type type)
{
return smp_processor_id();
}
static inline const struct cpumask *housekeeping_cpumask(enum hk_type type)
{
return cpu_possible_mask;
}
static inline bool housekeeping_enabled(enum hk_type type)
{
return false;
}
static inline void housekeeping_affine(struct task_struct *t,
enum hk_type type) { }
static inline bool housekeeping_test_cpu(int cpu, enum hk_type type)
{
return true;
}
static inline void housekeeping_init(void) { }
#endif /* CONFIG_CPU_ISOLATION */
static inline bool housekeeping_cpu(int cpu, enum hk_type type)
{
#ifdef CONFIG_CPU_ISOLATION
if (static_branch_unlikely(&housekeeping_overridden))
return housekeeping_test_cpu(cpu, type);
#endif
return true;
}
static inline bool cpu_is_isolated(int cpu)
{
return !housekeeping_test_cpu(cpu, HK_TYPE_DOMAIN) ||
!housekeeping_test_cpu(cpu, HK_TYPE_TICK);
}
#endif /* _LINUX_SCHED_ISOLATION_H */
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