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 HK_FLAG_KTHREAD = (1 << 8), 18 }; 19 20 #ifdef CONFIG_CPU_ISOLATION 21 DECLARE_STATIC_KEY_FALSE(housekeeping_overridden); 22 extern int housekeeping_any_cpu(enum hk_flags flags); 23 extern const struct cpumask *housekeeping_cpumask(enum hk_flags flags); 24 extern bool housekeeping_enabled(enum hk_flags flags); 25 extern void housekeeping_affine(struct task_struct *t, enum hk_flags flags); 26 extern bool housekeeping_test_cpu(int cpu, enum hk_flags flags); 27 extern void __init housekeeping_init(void); 28 29 #else 30 31 static inline int housekeeping_any_cpu(enum hk_flags flags) 32 { 33 return smp_processor_id(); 34 } 35 36 static inline const struct cpumask *housekeeping_cpumask(enum hk_flags flags) 37 { 38 return cpu_possible_mask; 39 } 40 41 static inline bool housekeeping_enabled(enum hk_flags flags) 42 { 43 return false; 44 } 45 46 static inline void housekeeping_affine(struct task_struct *t, 47 enum hk_flags flags) { } 48 static inline void housekeeping_init(void) { } 49 #endif /* CONFIG_CPU_ISOLATION */ 50 51 static inline bool housekeeping_cpu(int cpu, enum hk_flags flags) 52 { 53 #ifdef CONFIG_CPU_ISOLATION 54 if (static_branch_unlikely(&housekeeping_overridden)) 55 return housekeeping_test_cpu(cpu, flags); 56 #endif 57 return true; 58 } 59 60 #endif /* _LINUX_SCHED_ISOLATION_H */ 61