| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _LINUX_PSI_H |
| 3 | #define _LINUX_PSI_H |
| 4 | |
| 5 | #include <linux/jump_label.h> |
| 6 | #include <linux/psi_types.h> |
| 7 | #include <linux/sched.h> |
| 8 | #include <linux/poll.h> |
| 9 | #include <linux/cgroup-defs.h> |
| 10 | #include <linux/cgroup.h> |
| 11 | |
| 12 | struct seq_file; |
| 13 | struct css_set; |
| 14 | |
| 15 | #ifdef CONFIG_PSI |
| 16 | |
| 17 | extern struct static_key_false psi_disabled; |
| 18 | extern struct psi_group psi_system; |
| 19 | |
| 20 | void psi_init(void); |
| 21 | |
| 22 | void psi_memstall_enter(unsigned long *flags); |
| 23 | void psi_memstall_leave(unsigned long *flags); |
| 24 | |
| 25 | int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res); |
| 26 | struct psi_trigger *psi_trigger_create(struct psi_group *group, char *buf, |
| 27 | enum psi_res res, struct file *file, |
| 28 | struct kernfs_open_file *of); |
| 29 | void psi_trigger_destroy(struct psi_trigger *t); |
| 30 | |
| 31 | __poll_t psi_trigger_poll(void **trigger_ptr, struct file *file, |
| 32 | poll_table *wait); |
| 33 | |
| 34 | #ifdef CONFIG_CGROUPS |
| 35 | static inline struct psi_group *cgroup_psi(struct cgroup *cgrp) |
| 36 | { |
| 37 | return cgroup_ino(cgrp) == 1 ? &psi_system : cgrp->psi; |
| 38 | } |
| 39 | |
| 40 | int psi_cgroup_alloc(struct cgroup *cgrp); |
| 41 | void psi_cgroup_free(struct cgroup *cgrp); |
| 42 | void cgroup_move_task(struct task_struct *p, struct css_set *to); |
| 43 | void psi_cgroup_restart(struct psi_group *group); |
| 44 | #endif |
| 45 | |
| 46 | #else /* CONFIG_PSI */ |
| 47 | |
| 48 | static inline void psi_init(void) {} |
| 49 | |
| 50 | static inline void psi_memstall_enter(unsigned long *flags) {} |
| 51 | static inline void psi_memstall_leave(unsigned long *flags) {} |
| 52 | |
| 53 | #ifdef CONFIG_CGROUPS |
| 54 | static inline int psi_cgroup_alloc(struct cgroup *cgrp) |
| 55 | { |
| 56 | return 0; |
| 57 | } |
| 58 | static inline void psi_cgroup_free(struct cgroup *cgrp) |
| 59 | { |
| 60 | } |
| 61 | static inline void cgroup_move_task(struct task_struct *p, struct css_set *to) |
| 62 | { |
| 63 | rcu_assign_pointer(p->cgroups, to); |
| 64 | } |
| 65 | static inline void psi_cgroup_restart(struct psi_group *group) {} |
| 66 | #endif |
| 67 | |
| 68 | #endif /* CONFIG_PSI */ |
| 69 | |
| 70 | #endif /* _LINUX_PSI_H */ |
| 71 | |