From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-171.mta1.migadu.com (out-171.mta1.migadu.com [95.215.58.171]) (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 F200C259CBF; Wed, 13 Aug 2025 15:30:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755099030; cv=none; b=kKdUJNGocAqy3vSQDo4mewQfZEBt/kYqFdU44Rb1cvzvfIqOEM9/GcVHk9dXfNoPX61/oNDegVsLCmBU/83UkHcd4if/wB6p0ejY6vA2WmyPzhm8KoteaYoFGgmA6Z0wxlhynzTd29dXqw/SbSuZ1qd8+GqAUyRnxd5426Tj2xQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755099030; c=relaxed/simple; bh=Lq/MnBJO7IgZrEMAWluUyyddXBO6L7dMH0/XYrmHcf0=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=LzTzexqXeB5SZnYWqzFAfHzo/CnlcDI5L194m/zKhwkfDEt5EmTMHoStH3v9H2UH7J9bdl4c5BMg2PcAeFDeYBTwwF+M5YWUon7AEDa8Opm8Z63NcMMpe+JtL1konSiA4iQbbx5u9shA1dPqUqJfwK4lzFjgS4NddGiaIioM2QE= 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=h2vzrFgK; arc=none smtp.client-ip=95.215.58.171 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="h2vzrFgK" 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=1755099025; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=YbKIrg1u+aegCZtj1WAHU6eFnKOD0XbkWiMGluO5IUw=; b=h2vzrFgKPvgV0rds3aqAio70G3hP1AIFLxbOsX7gfavp3K0Ps4wuo0ukHltPOsxlMtr0ma vN6df2RLBi9JFUKnzUSOGWsoo2ri4zIDbS5A/7t3wmn/SqStunZAXuZXnzCRCFb6D8pi0W FqrddFnWclpXKZZ0Hc7Rj2ApLjZMFjk= From: KaFai Wan To: ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, mykolal@fb.com, shuah@kernel.org, kafai.wan@linux.dev, mrpre@163.com, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH bpf v2 0/2] bpf: Allow fall back to interpreter for programs with stack size <= 512 Date: Wed, 13 Aug 2025 23:29:56 +0800 Message-ID: <20250813152958.3107403-1-kafai.wan@linux.dev> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT This change restores interpreter fallback capability for BPF programs with stack size <= 512 bytes when jit fails. Add selftest for socket filter to test it. changes: v2: - Addressed comments from Alexei - Add selftest v1: https://lore.kernel.org/all/20250805115513.4018532-1-kafai.wan@linux.dev/ --- KaFai Wan (2): bpf: Allow fall back to interpreter for programs with stack size <= 512 selftests/bpf: Add socket filter attach test kernel/bpf/core.c | 16 ++- .../selftests/bpf/prog_tests/socket_filter.c | 124 ++++++++++++++++++ .../selftests/bpf/progs/socket_filter.c | 16 +++ 3 files changed, 149 insertions(+), 7 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/socket_filter.c create mode 100644 tools/testing/selftests/bpf/progs/socket_filter.c -- 2.43.0