tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
4 * Copyright (c) 2024 David Vernet <dvernet@meta.com>
5 */
6
7#include <scx/common.bpf.h>
8
9char _license[] SEC("license") = "GPL";
10
11#include "exit_test.h"
12
13const volatile int exit_point;
14UEI_DEFINE(uei);
15
16#define EXIT_CLEANLY() scx_bpf_exit(exit_point, "%d", exit_point)
17
18#define DSQ_ID 0
19
20s32 BPF_STRUCT_OPS(exit_select_cpu, struct task_struct *p,
21 s32 prev_cpu, u64 wake_flags)
22{
23 bool found;
24
25 if (exit_point == EXIT_SELECT_CPU)
26 EXIT_CLEANLY();
27
28 return scx_bpf_select_cpu_dfl(p, prev_cpu, wake_flags, &found);
29}
30
31void BPF_STRUCT_OPS(exit_enqueue, struct task_struct *p, u64 enq_flags)
32{
33 if (exit_point == EXIT_ENQUEUE)
34 EXIT_CLEANLY();
35
36 scx_bpf_dsq_insert(p, DSQ_ID, SCX_SLICE_DFL, enq_flags);
37}
38
39void BPF_STRUCT_OPS(exit_dispatch, s32 cpu, struct task_struct *p)
40{
41 if (exit_point == EXIT_DISPATCH)
42 EXIT_CLEANLY();
43
44 scx_bpf_dsq_move_to_local(DSQ_ID);
45}
46
47void BPF_STRUCT_OPS(exit_enable, struct task_struct *p)
48{
49 if (exit_point == EXIT_ENABLE)
50 EXIT_CLEANLY();
51}
52
53s32 BPF_STRUCT_OPS(exit_init_task, struct task_struct *p,
54 struct scx_init_task_args *args)
55{
56 if (exit_point == EXIT_INIT_TASK)
57 EXIT_CLEANLY();
58
59 return 0;
60}
61
62void BPF_STRUCT_OPS(exit_exit, struct scx_exit_info *ei)
63{
64 UEI_RECORD(uei, ei);
65}
66
67s32 BPF_STRUCT_OPS_SLEEPABLE(exit_init)
68{
69 if (exit_point == EXIT_INIT)
70 EXIT_CLEANLY();
71
72 return scx_bpf_create_dsq(DSQ_ID, -1);
73}
74
75SEC(".struct_ops.link")
76struct sched_ext_ops exit_ops = {
77 .select_cpu = (void *) exit_select_cpu,
78 .enqueue = (void *) exit_enqueue,
79 .dispatch = (void *) exit_dispatch,
80 .init_task = (void *) exit_init_task,
81 .enable = (void *) exit_enable,
82 .exit = (void *) exit_exit,
83 .init = (void *) exit_init,
84 .name = "exit",
85 .timeout_ms = 1000U,
86};