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