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 void housekeeping_affine(struct task_struct *t, enum hk_flags flags); 23 extern bool housekeeping_test_cpu(int cpu, enum hk_flags flags); 24 extern void __init housekeeping_init(void); 25 26 #else 27 28 static inline int housekeeping_any_cpu(enum hk_flags flags) 29 { 30 return smp_processor_id(); 31 } 32 33 static inline const struct cpumask *housekeeping_cpumask(enum hk_flags flags) 34 { 35 return cpu_possible_mask; 36 } 37 38 static inline void housekeeping_affine(struct task_struct *t, 39 enum hk_flags flags) { } 40 static inline void housekeeping_init(void) { } 41 #endif /* CONFIG_CPU_ISOLATION */ 42 43 static inline bool housekeeping_cpu(int cpu, enum hk_flags flags) 44 { 45 #ifdef CONFIG_CPU_ISOLATION 46 if (static_branch_unlikely(&housekeeping_overridden)) 47 return housekeeping_test_cpu(cpu, flags); 48 #endif 49 return true; 50 } 51 52 #endif /* _LINUX_SCHED_ISOLATION_H */ 53