Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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), |
Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 16 | HK_FLAG_MANAGED_IRQ = (1 << 7), |
| 17 | HK_FLAG_KTHREAD = (1 << 8), |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 18 | }; |
| 19 | |
| 20 | #ifdef CONFIG_CPU_ISOLATION |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 21 | DECLARE_STATIC_KEY_FALSE(housekeeping_overridden); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 22 | extern int housekeeping_any_cpu(enum hk_flags flags); |
| 23 | extern const struct cpumask *housekeeping_cpumask(enum hk_flags flags); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 24 | extern bool housekeeping_enabled(enum hk_flags flags); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 41 | static inline bool housekeeping_enabled(enum hk_flags flags) |
| 42 | { |
| 43 | return false; |
| 44 | } |
| 45 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 54 | if (static_branch_unlikely(&housekeeping_overridden)) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 55 | return housekeeping_test_cpu(cpu, flags); |
| 56 | #endif |
| 57 | return true; |
| 58 | } |
| 59 | |
| 60 | #endif /* _LINUX_SCHED_ISOLATION_H */ |