diff options
Diffstat (limited to 'include/linux/sched/isolation.h')
-rw-r--r-- | include/linux/sched/isolation.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/include/linux/sched/isolation.h b/include/linux/sched/isolation.h new file mode 100644 index 000000000..cc9f393e2 --- /dev/null +++ b/include/linux/sched/isolation.h @@ -0,0 +1,60 @@ +#ifndef _LINUX_SCHED_ISOLATION_H +#define _LINUX_SCHED_ISOLATION_H + +#include <linux/cpumask.h> +#include <linux/init.h> +#include <linux/tick.h> + +enum hk_flags { + HK_FLAG_TIMER = 1, + HK_FLAG_RCU = (1 << 1), + HK_FLAG_MISC = (1 << 2), + HK_FLAG_SCHED = (1 << 3), + HK_FLAG_TICK = (1 << 4), + HK_FLAG_DOMAIN = (1 << 5), + HK_FLAG_WQ = (1 << 6), + HK_FLAG_MANAGED_IRQ = (1 << 7), + HK_FLAG_KTHREAD = (1 << 8), +}; + +#ifdef CONFIG_CPU_ISOLATION +DECLARE_STATIC_KEY_FALSE(housekeeping_overridden); +extern int housekeeping_any_cpu(enum hk_flags flags); +extern const struct cpumask *housekeeping_cpumask(enum hk_flags flags); +extern bool housekeeping_enabled(enum hk_flags flags); +extern void housekeeping_affine(struct task_struct *t, enum hk_flags flags); +extern bool housekeeping_test_cpu(int cpu, enum hk_flags flags); +extern void __init housekeeping_init(void); + +#else + +static inline int housekeeping_any_cpu(enum hk_flags flags) +{ + return smp_processor_id(); +} + +static inline const struct cpumask *housekeeping_cpumask(enum hk_flags flags) +{ + return cpu_possible_mask; +} + +static inline bool housekeeping_enabled(enum hk_flags flags) +{ + return false; +} + +static inline void housekeeping_affine(struct task_struct *t, + enum hk_flags flags) { } +static inline void housekeeping_init(void) { } +#endif /* CONFIG_CPU_ISOLATION */ + +static inline bool housekeeping_cpu(int cpu, enum hk_flags flags) +{ +#ifdef CONFIG_CPU_ISOLATION + if (static_branch_unlikely(&housekeeping_overridden)) + return housekeeping_test_cpu(cpu, flags); +#endif + return true; +} + +#endif /* _LINUX_SCHED_ISOLATION_H */ |