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 HK_FLAG_MANAGED_IRQ = (1 << 7), 17 }; 18 19 #ifdef CONFIG_CPU_ISOLATION 20 DECLARE_STATIC_KEY_FALSE(housekeeping_overridden); 21 extern int housekeeping_any_cpu(enum hk_flags flags); 22 extern const struct cpumask *housekeeping_cpumask(enum hk_flags flags); 23 extern bool housekeeping_enabled(enum hk_flags flags); 24 extern void housekeeping_affine(struct task_struct *t, enum hk_flags flags); 25 extern bool housekeeping_test_cpu(int cpu, enum hk_flags flags); 26 extern void __init housekeeping_init(void); 27 28 #else 29 30 static inline int housekeeping_any_cpu(enum hk_flags flags) 31 { 32 return smp_processor_id(); 33 } 34 35 static inline const struct cpumask *housekeeping_cpumask(enum hk_flags flags) 36 { 37 return cpu_possible_mask; 38 } 39 40 static inline bool housekeeping_enabled(enum hk_flags flags) 41 { 42 return false; 43 } 44 45 static inline void housekeeping_affine(struct task_struct *t, 46 enum hk_flags flags) { } 47 static inline void housekeeping_init(void) { } 48 #endif /* CONFIG_CPU_ISOLATION */ 49 50 static inline bool housekeeping_cpu(int cpu, enum hk_flags flags) 51 { 52 #ifdef CONFIG_CPU_ISOLATION 53 if (static_branch_unlikely(&housekeeping_overridden)) 54 return housekeeping_test_cpu(cpu, flags); 55 #endif 56 return true; 57 } 58 59 #endif /* _LINUX_SCHED_ISOLATION_H */ 60