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[J-linux.git] / tools / testing / selftests / sched_ext / maximal.bpf.c
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * A scheduler with every callback defined.
4  *
5  * This scheduler defines every callback.
6  *
7  * Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
8  * Copyright (c) 2024 David Vernet <[email protected]>
9  */
10
11 #include <scx/common.bpf.h>
12
13 char _license[] SEC("license") = "GPL";
14
15 #define DSQ_ID 0
16
17 s32 BPF_STRUCT_OPS(maximal_select_cpu, struct task_struct *p, s32 prev_cpu,
18                    u64 wake_flags)
19 {
20         return prev_cpu;
21 }
22
23 void BPF_STRUCT_OPS(maximal_enqueue, struct task_struct *p, u64 enq_flags)
24 {
25         scx_bpf_dsq_insert(p, DSQ_ID, SCX_SLICE_DFL, enq_flags);
26 }
27
28 void BPF_STRUCT_OPS(maximal_dequeue, struct task_struct *p, u64 deq_flags)
29 {}
30
31 void BPF_STRUCT_OPS(maximal_dispatch, s32 cpu, struct task_struct *prev)
32 {
33         scx_bpf_dsq_move_to_local(DSQ_ID);
34 }
35
36 void BPF_STRUCT_OPS(maximal_runnable, struct task_struct *p, u64 enq_flags)
37 {}
38
39 void BPF_STRUCT_OPS(maximal_running, struct task_struct *p)
40 {}
41
42 void BPF_STRUCT_OPS(maximal_stopping, struct task_struct *p, bool runnable)
43 {}
44
45 void BPF_STRUCT_OPS(maximal_quiescent, struct task_struct *p, u64 deq_flags)
46 {}
47
48 bool BPF_STRUCT_OPS(maximal_yield, struct task_struct *from,
49                     struct task_struct *to)
50 {
51         return false;
52 }
53
54 bool BPF_STRUCT_OPS(maximal_core_sched_before, struct task_struct *a,
55                     struct task_struct *b)
56 {
57         return false;
58 }
59
60 void BPF_STRUCT_OPS(maximal_set_weight, struct task_struct *p, u32 weight)
61 {}
62
63 void BPF_STRUCT_OPS(maximal_set_cpumask, struct task_struct *p,
64                     const struct cpumask *cpumask)
65 {}
66
67 void BPF_STRUCT_OPS(maximal_update_idle, s32 cpu, bool idle)
68 {}
69
70 void BPF_STRUCT_OPS(maximal_cpu_acquire, s32 cpu,
71                     struct scx_cpu_acquire_args *args)
72 {}
73
74 void BPF_STRUCT_OPS(maximal_cpu_release, s32 cpu,
75                     struct scx_cpu_release_args *args)
76 {}
77
78 void BPF_STRUCT_OPS(maximal_cpu_online, s32 cpu)
79 {}
80
81 void BPF_STRUCT_OPS(maximal_cpu_offline, s32 cpu)
82 {}
83
84 s32 BPF_STRUCT_OPS(maximal_init_task, struct task_struct *p,
85                    struct scx_init_task_args *args)
86 {
87         return 0;
88 }
89
90 void BPF_STRUCT_OPS(maximal_enable, struct task_struct *p)
91 {}
92
93 void BPF_STRUCT_OPS(maximal_exit_task, struct task_struct *p,
94                     struct scx_exit_task_args *args)
95 {}
96
97 void BPF_STRUCT_OPS(maximal_disable, struct task_struct *p)
98 {}
99
100 s32 BPF_STRUCT_OPS(maximal_cgroup_init, struct cgroup *cgrp,
101                    struct scx_cgroup_init_args *args)
102 {
103         return 0;
104 }
105
106 void BPF_STRUCT_OPS(maximal_cgroup_exit, struct cgroup *cgrp)
107 {}
108
109 s32 BPF_STRUCT_OPS(maximal_cgroup_prep_move, struct task_struct *p,
110                    struct cgroup *from, struct cgroup *to)
111 {
112         return 0;
113 }
114
115 void BPF_STRUCT_OPS(maximal_cgroup_move, struct task_struct *p,
116                     struct cgroup *from, struct cgroup *to)
117 {}
118
119 void BPF_STRUCT_OPS(maximal_cgroup_cancel_move, struct task_struct *p,
120                struct cgroup *from, struct cgroup *to)
121 {}
122
123 void BPF_STRUCT_OPS(maximal_cgroup_set_weight, struct cgroup *cgrp, u32 weight)
124 {}
125
126 s32 BPF_STRUCT_OPS_SLEEPABLE(maximal_init)
127 {
128         return scx_bpf_create_dsq(DSQ_ID, -1);
129 }
130
131 void BPF_STRUCT_OPS(maximal_exit, struct scx_exit_info *info)
132 {}
133
134 SEC(".struct_ops.link")
135 struct sched_ext_ops maximal_ops = {
136         .select_cpu             = (void *) maximal_select_cpu,
137         .enqueue                = (void *) maximal_enqueue,
138         .dequeue                = (void *) maximal_dequeue,
139         .dispatch               = (void *) maximal_dispatch,
140         .runnable               = (void *) maximal_runnable,
141         .running                = (void *) maximal_running,
142         .stopping               = (void *) maximal_stopping,
143         .quiescent              = (void *) maximal_quiescent,
144         .yield                  = (void *) maximal_yield,
145         .core_sched_before      = (void *) maximal_core_sched_before,
146         .set_weight             = (void *) maximal_set_weight,
147         .set_cpumask            = (void *) maximal_set_cpumask,
148         .update_idle            = (void *) maximal_update_idle,
149         .cpu_acquire            = (void *) maximal_cpu_acquire,
150         .cpu_release            = (void *) maximal_cpu_release,
151         .cpu_online             = (void *) maximal_cpu_online,
152         .cpu_offline            = (void *) maximal_cpu_offline,
153         .init_task              = (void *) maximal_init_task,
154         .enable                 = (void *) maximal_enable,
155         .exit_task              = (void *) maximal_exit_task,
156         .disable                = (void *) maximal_disable,
157         .cgroup_init            = (void *) maximal_cgroup_init,
158         .cgroup_exit            = (void *) maximal_cgroup_exit,
159         .cgroup_prep_move       = (void *) maximal_cgroup_prep_move,
160         .cgroup_move            = (void *) maximal_cgroup_move,
161         .cgroup_cancel_move     = (void *) maximal_cgroup_cancel_move,
162         .cgroup_set_weight      = (void *) maximal_cgroup_set_weight,
163         .init                   = (void *) maximal_init,
164         .exit                   = (void *) maximal_exit,
165         .name                   = "maximal",
166 };
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