From patchwork Mon Dec 9 00:01:11 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexei Starovoitov X-Patchwork-Id: 1205785 Return-Path: X-Original-To: incoming-bpf@patchwork.ozlabs.org Delivered-To: patchwork-incoming-bpf@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=bpf-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47WNdX1139z9sPh for ; Mon, 9 Dec 2019 11:01:19 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726901AbfLIABT convert rfc822-to-8bit (ORCPT ); Sun, 8 Dec 2019 19:01:19 -0500 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:20720 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726857AbfLIABT (ORCPT ); Sun, 8 Dec 2019 19:01:19 -0500 Received: from pps.filterd (m0148460.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xB8NvIwt022078 for ; Sun, 8 Dec 2019 16:01:17 -0800 Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 2wrbwmdxyb-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Sun, 08 Dec 2019 16:01:17 -0800 Received: from intmgw002.41.prn1.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:82::e) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Sun, 8 Dec 2019 16:01:16 -0800 Received: by devbig007.ftw2.facebook.com (Postfix, from userid 572438) id 85208760CCB; Sun, 8 Dec 2019 16:01:14 -0800 (PST) Smtp-Origin-Hostprefix: devbig From: Alexei Starovoitov Smtp-Origin-Hostname: devbig007.ftw2.facebook.com To: CC: , , , , , Smtp-Origin-Cluster: ftw2c04 Subject: [PATCH bpf 0/3] bpf: Make BPF trampoline friendly to ftrace Date: Sun, 8 Dec 2019 16:01:11 -0800 Message-ID: <20191209000114.1876138-1-ast@kernel.org> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95, 18.0.572 definitions=2019-12-08_07:2019-12-05, 2019-12-08 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_midline policy=fb_default score=62 bulkscore=0 phishscore=0 adultscore=0 malwarescore=0 suspectscore=1 priorityscore=1501 mlxlogscore=-20 clxscore=1015 impostorscore=0 lowpriorityscore=0 mlxscore=62 spamscore=62 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1912080207 X-FB-Internal: spam Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Patch 1 - fix crash function_graph tracer encounters BPF trampoline Patch 2 - use register_ftrace_direct() API to attach BPF trampoline Patch 3 - simple test Alexei Starovoitov (3): ftrace: Fix function_graph tracer interaction with BPF trampoline bpf: Make BPF trampoline use register_ftrace_direct() API selftests/bpf: test function_graph tracer and bpf trampoline together arch/x86/kernel/ftrace.c | 14 ----- include/linux/bpf.h | 1 + include/linux/ftrace.h | 5 ++ kernel/bpf/trampoline.c | 64 ++++++++++++++++++++-- kernel/trace/fgraph.c | 9 +++ kernel/trace/ftrace.c | 19 +++---- tools/testing/selftests/bpf/test_ftrace.sh | 39 +++++++++++++ 7 files changed, 119 insertions(+), 32 deletions(-) create mode 100755 tools/testing/selftests/bpf/test_ftrace.sh Acked-by: Martin KaFai Lau