From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-178.mta1.migadu.com (out-178.mta1.migadu.com [95.215.58.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AE04E2C21E1 for ; Wed, 3 Sep 2025 14:05:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.178 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756908305; cv=none; b=fhYrtGlQpNAt1NjLI6JoODb8MUBYtvuTHNhrqEcaGDnfMpm3tkIVTvvzxv5ZYjiJOQ9r57nEPGkz4DulK7Ntn4Hx70dOWwDWpaiDd2OcxUx7a7NwKHY8hl1WwiFNwI4LX+GmGoc7wBIs/YGKuhw3yFx7SqgUwkbDUnw5WrFCcfw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756908305; c=relaxed/simple; bh=/4IioYM7RfTcIkRryrZZz1i94WxHEcIYyGLmMmYRpg8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZMf7OcbHzBSzivORutMmhqlAKuif1wpDq399b4/tAM+CcRf/M8BKd3etzF+ljvlIb6W9xviix9o+LbF6YiCPBgeT5lP0rEHRKL3jgXyq1u8pMIWAMyFquQT687YN3wxkHq/RB/ing2kTYtGBRKRVvMOyDFtHni9fywGiYaRF+l8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=WL/gpBL0; arc=none smtp.client-ip=95.215.58.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="WL/gpBL0" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1756908301; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=e6nxrlqRMtFeHnZoqd20NO5GeXFFEYe5HOjLj6zAn9Y=; b=WL/gpBL046bRup6eWP0zel+f8FTXHYjFeqJsmCcbNoR82c1s87/AiGYX3JDRXVmpPdvT+L EA3dqQHwGRA11051LZG6ma6NLcMWtcywY62gvo+AXMt1XYYjjjMzvlDBSW4BQQulv/rlZa gi70CCjix2xFDeUmBBFlDptoBVGqalQ= From: Leon Hwang To: bpf@vger.kernel.org Cc: ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, kernel-patches-bot@fb.com, Leon Hwang Subject: [PATCH bpf-next v3 2/2] selftests/bpf: Add case to test bpf_in_interrupt() Date: Wed, 3 Sep 2025 22:04:38 +0800 Message-ID: <20250903140438.59517-3-leon.hwang@linux.dev> In-Reply-To: <20250903140438.59517-1-leon.hwang@linux.dev> References: <20250903140438.59517-1-leon.hwang@linux.dev> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Add a timer test case to test 'bpf_in_interrupt()'. cd tools/testing/selftests/bpf ./test_progs -t timer_interrupt 462 timer_interrupt:OK Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Leon Hwang --- .../testing/selftests/bpf/prog_tests/timer.c | 30 ++++++++++++ .../selftests/bpf/progs/timer_interrupt.c | 48 +++++++++++++++++++ 2 files changed, 78 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/timer_interrupt.c diff --git a/tools/testing/selftests/bpf/prog_tests/timer.c b/tools/testing/selftests/bpf/prog_tests/timer.c index d66687f1ee6a..049efb5e7823 100644 --- a/tools/testing/selftests/bpf/prog_tests/timer.c +++ b/tools/testing/selftests/bpf/prog_tests/timer.c @@ -3,6 +3,7 @@ #include #include "timer.skel.h" #include "timer_failure.skel.h" +#include "timer_interrupt.skel.h" #define NUM_THR 8 @@ -95,3 +96,32 @@ void serial_test_timer(void) RUN_TESTS(timer_failure); } + +void test_timer_interrupt(void) +{ + struct timer_interrupt *skel = NULL; + int err, prog_fd; + LIBBPF_OPTS(bpf_test_run_opts, opts); + + skel = timer_interrupt__open_and_load(); + if (!ASSERT_OK_PTR(skel, "timer_interrupt__open_and_load")) + return; + + err = timer_interrupt__attach(skel); + if (!ASSERT_OK(err, "timer_interrupt__attach")) + goto out; + + prog_fd = bpf_program__fd(skel->progs.test_timer_interrupt); + err = bpf_prog_test_run_opts(prog_fd, &opts); + if (!ASSERT_OK(err, "bpf_prog_test_run_opts")) + goto out; + + usleep(50); + + ASSERT_EQ(skel->bss->in_interrupt, 0, "in_interrupt"); + if (skel->bss->preempt_count) + ASSERT_NEQ(skel->bss->in_interrupt_cb, 0, "in_interrupt_cb"); + +out: + timer_interrupt__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/progs/timer_interrupt.c b/tools/testing/selftests/bpf/progs/timer_interrupt.c new file mode 100644 index 000000000000..19180a455f40 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/timer_interrupt.c @@ -0,0 +1,48 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include "bpf_experimental.h" + +char _license[] SEC("license") = "GPL"; + +#define CLOCK_MONOTONIC 1 + +int preempt_count; +int in_interrupt; +int in_interrupt_cb; + +struct elem { + struct bpf_timer t; +}; + +struct { + __uint(type, BPF_MAP_TYPE_ARRAY); + __uint(max_entries, 1); + __type(key, int); + __type(value, struct elem); +} array SEC(".maps"); + +static int timer_in_interrupt(void *map, int *key, struct bpf_timer *timer) +{ + preempt_count = get_preempt_count(); + in_interrupt_cb = bpf_in_interrupt(); + return 0; +} + +SEC("fentry/bpf_fentry_test1") +int BPF_PROG(test_timer_interrupt) +{ + struct bpf_timer *timer; + int key = 0; + + timer = bpf_map_lookup_elem(&array, &key); + if (!timer) + return 0; + + in_interrupt = bpf_in_interrupt(); + bpf_timer_init(timer, &array, CLOCK_MONOTONIC); + bpf_timer_set_callback(timer, timer_in_interrupt); + bpf_timer_start(timer, 0, 0); + return 0; +} -- 2.51.0