// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2026 Valve Corporation. * Author: Changwoo Min <changwoo@igalia.com> */ #include "vmlinux.h" #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> #include "bpf_experimental.h" char _license[] SEC("license") = "GPL"; extern void bpf_kfunc_trigger_ctx_check(void) __ksym; int count_hardirq; int count_softirq; int count_task; /* Triggered via bpf_prog_test_run from user-space */ SEC("syscall") int trigger_all_contexts(void *ctx) { if (bpf_in_task()) __sync_fetch_and_add(&count_task, 1); /* Trigger the firing of a hardirq and softirq for test. */ bpf_kfunc_trigger_ctx_check(); return 0; } /* Observer for HardIRQ */ SEC("fentry/bpf_testmod_test_hardirq_fn") int BPF_PROG(on_hardirq) { if (bpf_in_hardirq()) __sync_fetch_and_add(&count_hardirq, 1); return 0; } /* Observer for SoftIRQ */ SEC("fentry/bpf_testmod_test_softirq_fn") int BPF_PROG(on_softirq) { if (bpf_in_serving_softirq()) __sync_fetch_and_add(&count_softirq, 1); return 0; }