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