From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 40F0AC6379D for ; Thu, 26 Nov 2020 18:10:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DAF6F21D7E for ; Thu, 26 Nov 2020 18:10:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="CLAD617F" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404769AbgKZSJs (ORCPT ); Thu, 26 Nov 2020 13:09:48 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:59652 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404684AbgKZSJr (ORCPT ); Thu, 26 Nov 2020 13:09:47 -0500 Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0AQI2R5D010721; Thu, 26 Nov 2020 13:09:13 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding; s=pp1; bh=GkXeqL17xR8dq2eMis8ZuSHWSqLLqoclDTnnUCoHGhk=; b=CLAD617FpL3Z2qZXFij8btKgri5W7sHj6YpjdedQsmj2b3IF7DV7z0IZFTk06W/sKSoy VR+30JmHZ2YuZGIcto5pvusAbAnGorwHLs/2Df12HmOKhKAWW2jhpg2JqIrOsCDd5Z28 NsCGNCX4JamsWaVa7jIkIrjk0HmILwflQwRxGODJCaofLjehXJ6k5Xg1gl9gx+C4Uts5 A/Dago0tFHYl60YY3bKegBV2DOEWpz0haNPeQOJcKT4qj2zmbfITlZt2V8xMy4C3eeQJ hJhHMlWyINSp9IOKeBU5pICQTT2jyoFoCoE2WoPs2ZAPSHcp5AknqB1RF/AHmbxRhcsn qg== Received: from ppma06fra.de.ibm.com (48.49.7a9f.ip4.static.sl-reverse.com [159.122.73.72]) by mx0a-001b2d01.pphosted.com with ESMTP id 352ccerhxm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 26 Nov 2020 13:09:13 -0500 Received: from pps.filterd (ppma06fra.de.ibm.com [127.0.0.1]) by ppma06fra.de.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 0AQI7D9K002582; Thu, 26 Nov 2020 18:09:11 GMT Received: from b06avi18878370.portsmouth.uk.ibm.com (b06avi18878370.portsmouth.uk.ibm.com [9.149.26.194]) by ppma06fra.de.ibm.com with ESMTP id 351pca0p12-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 26 Nov 2020 18:09:11 +0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0AQI98iG56033598 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 26 Nov 2020 18:09:08 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A13C1A405C; Thu, 26 Nov 2020 18:09:08 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3082EA405B; Thu, 26 Nov 2020 18:09:06 +0000 (GMT) Received: from naverao1-tp.ibmuc.com (unknown [9.85.81.45]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 26 Nov 2020 18:09:05 +0000 (GMT) From: "Naveen N. Rao" To: Steven Rostedt , Michael Ellerman Cc: , Subject: [RFC PATCH 00/14] powerpc64: Add support for ftrace direct calls Date: Thu, 26 Nov 2020 23:38:37 +0530 Message-Id: X-Mailer: git-send-email 2.25.4 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-11-26_08:2020-11-26,2020-11-26 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 suspectscore=0 lowpriorityscore=0 bulkscore=0 mlxlogscore=999 malwarescore=0 clxscore=1011 spamscore=0 phishscore=0 priorityscore=1501 adultscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011260108 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series adds support for DYNAMIC_FTRACE_WITH_DIRECT_CALLS for powerpc64le. This is mostly working fine for me, except for a soft lockup I see with the ftrace direct selftest. It happens when irqsoff tracer is being tested with the ftrace direct modules. This appears to be an existing upstream issue since I am able to reproduce the lockup without these patches. I will be looking into that to see if I can figure out the cause of those lockups. In the meantime, I would appreciate a review of these patches. - Naveen Naveen N. Rao (14): ftrace: Fix updating FTRACE_FL_TRAMP ftrace: Fix DYNAMIC_FTRACE_WITH_DIRECT_CALLS dependency ftrace: Fix cleanup in error path of register_ftrace_direct() ftrace: Remove ftrace_find_direct_func() ftrace: Add architectural helpers for [un]register_ftrace_direct() powerpc: Add support for CONFIG_HAVE_FUNCTION_ARG_ACCESS_API powerpc/ftrace: Remove dead code powerpc/ftrace: Use FTRACE_REGS_ADDR to identify the correct ftrace trampoline powerpc/ftrace: Use a hash table for tracking ftrace stubs powerpc/ftrace: Drop assumptions about ftrace trampoline target powerpc/ftrace: Use GPR save/restore macros in ftrace_graph_caller() powerpc/ftrace: Drop saving LR to stack save area for -mprofile-kernel powerpc/ftrace: Add support for register_ftrace_direct() for MPROFILE_KERNEL samples/ftrace: Add powerpc support for ftrace direct samples arch/powerpc/Kconfig | 2 + arch/powerpc/include/asm/ftrace.h | 14 + arch/powerpc/include/asm/ptrace.h | 31 ++ arch/powerpc/kernel/trace/ftrace.c | 314 +++++++++++++----- .../powerpc/kernel/trace/ftrace_64_mprofile.S | 70 ++-- include/linux/ftrace.h | 7 +- kernel/trace/Kconfig | 2 +- kernel/trace/ftrace.c | 130 +++----- samples/Kconfig | 2 +- samples/ftrace/ftrace-direct-modify.c | 58 ++++ samples/ftrace/ftrace-direct-too.c | 48 ++- samples/ftrace/ftrace-direct.c | 45 ++- 12 files changed, 519 insertions(+), 204 deletions(-) base-commit: 4c202167192a77481310a3cacae9f12618b92216 -- 2.25.4