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=-6.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=no 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 9B3C5C4727D for ; Sat, 26 Sep 2020 01:01:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 476FE20838 for ; Sat, 26 Sep 2020 01:01:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="B96tJkgT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729835AbgIZBBF (ORCPT ); Fri, 25 Sep 2020 21:01:05 -0400 Received: from m42-4.mailgun.net ([69.72.42.4]:27992 "EHLO m42-4.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729426AbgIZBBD (ORCPT ); Fri, 25 Sep 2020 21:01:03 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1601082062; h=Content-Transfer-Encoding: MIME-Version: Message-Id: Date: Subject: Cc: To: From: Sender; bh=inVwG+lgLK3y69RPi+2kZXAeaXX0aKhf2C3eywTtfvc=; b=B96tJkgTx3/1twMd041hrGfkwBLQtMFIqdDebw8ytxyVEZKHchI4199JrlhYuKflW5wVTUEW x0wn6cnETMyxmcMo7CcELRyJBDmtMY2nanpthrjRsGR+4DV05ptPFH9Tf01KwWw5a0QStOIh kIZP3aXS2+pOfjIOG3m8gUWQgR4= X-Mailgun-Sending-Ip: 69.72.42.4 X-Mailgun-Sid: WyI0MWYwYSIsICJsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n01.prod.us-west-2.postgun.com with SMTP id 5f6e92bf09b3131964fceb9e (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Sat, 26 Sep 2020 01:00:47 GMT Sender: tingwei=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id B317CC433C8; Sat, 26 Sep 2020 01:00:46 +0000 (UTC) Received: from tingweiz-gv.qualcomm.com (unknown [180.166.53.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: tingwei) by smtp.codeaurora.org (Postfix) with ESMTPSA id 43463C433C8; Sat, 26 Sep 2020 01:00:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 43463C433C8 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=tingwei@codeaurora.org From: Tingwei Zhang To: Steven Rostedt , Ingo Molnar , Alexander Shishkin , Maxime Coquelin , Alexandre Torgue Cc: Tingwei Zhang , Mathieu Poirier , Suzuki K Poulose , tsoni@codeaurora.org, Sai Prakash Ranjan , Mao Jinlong , linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 0/6] tracing: export event trace and trace_marker Date: Sat, 26 Sep 2020 08:59:59 +0800 Message-Id: <20200926010005.14689-1-tingwei@codeaurora.org> X-Mailer: git-send-email 2.20.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ftrace has ability to export trace packets to other destination. Currently, only function trace can be exported. This series extends the support to event trace and trace_maker. STM is one possible destination to export ftrace. Use separate channel for each CPU to avoid mixing up packets from different CPUs together. Change from v3: Round up number of channels to power of 2. (Alex) Change from v2: Change flag definition to BIT(). (Steven) Add comment in stm_ftrace_write() to clarify it's safe to use smp_processor_id() here since preempt is disabled. (Steven) Change from v1: All changes are suggested by Steven Rostedt. User separate flag to control function trace, event trace and trace mark. Allocate channels according to num_possible_cpu() dynamically. Move ftrace_exports routines up so all ftrace can use them. Tingwei Zhang (6): stm class: ftrace: change dependency to TRACING tracing: add flag to control different traces tracing: add trace_export support for event trace tracing: add trace_export support for trace_marker stm class: ftrace: enable supported trace export flag stm class: ftrace: use different channel accroding to CPU drivers/hwtracing/stm/Kconfig | 2 +- drivers/hwtracing/stm/ftrace.c | 7 +- include/linux/trace.h | 7 + kernel/trace/trace.c | 270 ++++++++++++++++++--------------- 4 files changed, 159 insertions(+), 127 deletions(-) -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project