62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2024 Meta Platforms, Inc. and affiliates.
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* Copyright (c) 2024 David Vernet <dvernet@meta.com>
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*/
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#include <scx/common.bpf.h>
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char _license[] SEC("license") = "GPL";
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#include "hotplug_test.h"
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UEI_DEFINE(uei);
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void BPF_STRUCT_OPS(hotplug_exit, struct scx_exit_info *ei)
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{
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UEI_RECORD(uei, ei);
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}
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static void exit_from_hotplug(s32 cpu, bool onlining)
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{
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/*
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* Ignored, just used to verify that we can invoke blocking kfuncs
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* from the hotplug path.
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*/
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scx_bpf_create_dsq(0, -1);
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s64 code = SCX_ECODE_ACT_RESTART | HOTPLUG_EXIT_RSN;
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if (onlining)
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code |= HOTPLUG_ONLINING;
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scx_bpf_exit(code, "hotplug event detected (%d going %s)", cpu,
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onlining ? "online" : "offline");
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}
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void BPF_STRUCT_OPS_SLEEPABLE(hotplug_cpu_online, s32 cpu)
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{
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exit_from_hotplug(cpu, true);
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}
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void BPF_STRUCT_OPS_SLEEPABLE(hotplug_cpu_offline, s32 cpu)
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{
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exit_from_hotplug(cpu, false);
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}
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SEC(".struct_ops.link")
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struct sched_ext_ops hotplug_cb_ops = {
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.cpu_online = (void *) hotplug_cpu_online,
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.cpu_offline = (void *) hotplug_cpu_offline,
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.exit = (void *) hotplug_exit,
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.name = "hotplug_cbs",
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.timeout_ms = 1000U,
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};
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SEC(".struct_ops.link")
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struct sched_ext_ops hotplug_nocb_ops = {
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.exit = (void *) hotplug_exit,
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.name = "hotplug_nocbs",
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.timeout_ms = 1000U,
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};
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