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 8 enum 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 }; 16 17 #ifdef CONFIG_CPU_ISOLATION 18 DECLARE_STATIC_KEY_FALSE(housekeeping_overriden); 19 extern int housekeeping_any_cpu(enum hk_flags flags); 20 extern const struct cpumask *housekeeping_cpumask(enum hk_flags flags); 21 extern void housekeeping_affine(struct task_struct *t, enum hk_flags flags); 22 extern bool housekeeping_test_cpu(int cpu, enum hk_flags flags); 23 extern void __init housekeeping_init(void); 24 25 #else 26 27 static inline int housekeeping_any_cpu(enum hk_flags flags) 28 { 29 return smp_processor_id(); 30 } 31 32 static inline const struct cpumask *housekeeping_cpumask(enum hk_flags flags) 33 { 34 return cpu_possible_mask; 35 } 36 37 static inline void housekeeping_affine(struct task_struct *t, 38 enum hk_flags flags) { } 39 static inline void housekeeping_init(void) { } 40 #endif /* CONFIG_CPU_ISOLATION */ 41 42 static inline bool housekeeping_cpu(int cpu, enum hk_flags flags) 43 { 44 #ifdef CONFIG_CPU_ISOLATION 45 if (static_branch_unlikely(&housekeeping_overriden)) 46 return housekeeping_test_cpu(cpu, flags); 47 #endif 48 return true; 49 } 50 51 #endif /* _LINUX_SCHED_ISOLATION_H */ 52