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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14B7AC433F5 for ; Fri, 29 Apr 2022 16:29:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1379190AbiD2Qcd (ORCPT ); Fri, 29 Apr 2022 12:32:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51088 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1379176AbiD2Qb5 (ORCPT ); Fri, 29 Apr 2022 12:31:57 -0400 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 48D98DAA1D for ; Fri, 29 Apr 2022 09:28:27 -0700 (PDT) Received: by mail-pj1-x102e.google.com with SMTP id o69so6184615pjo.3 for ; Fri, 29 Apr 2022 09:28:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=8o1g1pc1Zo4mdrCDNvDc1CgrtJ8NQHSuN+bpLSURGl8=; b=ElAPM0Q3mcvn5oehIQusEMmbTDC+Tdgr9DqEFZ4e/tgDU5vyB6ZS/+cLvyyGcuo8oc C/0ilD5BPnZuM6mkYjXz3UbEFnuDWtK4dtUPRAjeD+SBy6h7BJROAR+6bF8FEsmPgXIe xna4rWFAgG6K5r3Dz2NDQkPetJpJbDPaZYL0qFiMHfNHOM/IZcIm+ORZgm4DyB70mGOM 5EEZO449flHI5al9KIDLWQRt/0BaibHb+UGU0UamjPJOH9s8j90UnfIwBOPhuqGOjTSH Dl2ZKa6xjTxQ6ZuVD7G2GemGFJe+4ob06HhIGd6b6MNIHVn/0PpsiSqBG4h1PmtB8CQh vPsw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=8o1g1pc1Zo4mdrCDNvDc1CgrtJ8NQHSuN+bpLSURGl8=; b=RVKsFnARNtzf+YjdE1GmkFTg62n6hnYQjd/7Ex2pCHAXzG45vlp3Zv/Q/LmL5QRNDH rWkRKaFjyaXxuwQoo6xvTavmFC5HSbxSaI8V2fh7wWyS0pR1oOrx39L8LbsqSCSGEjx2 DmmIhPP5Ufg+2VYXeZiqNC97e10a7F6hfvPy4k35PncYm9xU50lXEmwKFYqHo3dYpUPV BbfCP15tFMxQDQWGqpoRCGDhLCKp0ACGk9Liw0MC6yf4iVPixvOaYggNfBupFhoTLqY6 H4g0IWyGAOL5s1JHIcK63cg1CwB2kHYzwDgrrwVV82bgfvQr+ETL3BvOI6IbKBrki5w5 n1Pw== X-Gm-Message-State: AOAM532aToih+W9UVOTw4I7KRG1oqiqWz7e0Rc2iUsat59uQXYD51jnv /krmfM8ul/Szybj6fYNvcrrtVA== X-Google-Smtp-Source: ABdhPJyvdpbS70C6vXVgKYdx6dM5RdCk6nlSpEqUBzE4WMG2pJQzRuzdjOIfLA0gRuSH51lH8EJhzg== X-Received: by 2002:a17:902:ba93:b0:157:1905:f4bc with SMTP id k19-20020a170902ba9300b001571905f4bcmr39283151pls.83.1651249706427; Fri, 29 Apr 2022 09:28:26 -0700 (PDT) Received: from leoy-ThinkPad-X240s ([134.195.101.46]) by smtp.gmail.com with ESMTPSA id e126-20020a621e84000000b0050567191161sm3603680pfe.210.2022.04.29.09.28.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Apr 2022 09:28:26 -0700 (PDT) Date: Sat, 30 Apr 2022 00:28:21 +0800 From: Leo Yan To: German Gomez Cc: coresight@lists.linaro.org, mathieu.poirier@linaro.org, suzuki.poulose@arm.com, james.clark@arm.com, mike.leach@linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] coresight: etm4x: Expose default timestamp source in sysfs Message-ID: <20220429162821.GA653442@leoy-ThinkPad-X240s> References: <20220429123100.268059-1-german.gomez@arm.com> <20220429123100.268059-2-german.gomez@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220429123100.268059-2-german.gomez@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Apr 29, 2022 at 01:30:59PM +0100, German Gomez wrote: > Add a new sysfs interface in /sys/bus/coresight/devices/etm/ts_source > indicating the configured timestamp source when the ETM device driver > was probed. > > The perf tool will use this information to detect if the trace data > timestamp matches the kernel time, enabling correlation of CoreSight > trace with perf events. > > Suggested-by: Suzuki K Poulose > Signed-off-by: German Gomez Reviewed-by: Leo Yan