From patchwork Wed May 4 11:28:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sai Prakash Ranjan X-Patchwork-Id: 12837696 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 39F39C433EF for ; Wed, 4 May 2022 11:29:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348808AbiEDLdX (ORCPT ); Wed, 4 May 2022 07:33:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348824AbiEDLdS (ORCPT ); Wed, 4 May 2022 07:33:18 -0400 Received: from alexa-out.qualcomm.com (alexa-out.qualcomm.com [129.46.98.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C34B62BB38; Wed, 4 May 2022 04:29:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1651663783; x=1683199783; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=WMfrbW6aHjrx/MqUK3KUM6mipCuetkL4KAFC6OrnsvM=; b=Ap1PZZlbuV2+3dpL6YNsD871umm5NbWYeSE3uRREOVWBbAK3tOUwBCfh kFLfXwyg9hsMZ2Gq4qE4JIEs4yAvY82afO0lTyCVhWWKCbeIFuBI7MqCj i1ru6IVPKkxof1yWZbdSseAPNICr3oF8EP57r1iqKtm31X5/VazwE/RvV 0=; Received: from ironmsg08-lv.qualcomm.com ([10.47.202.152]) by alexa-out.qualcomm.com with ESMTP; 04 May 2022 04:29:43 -0700 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg08-lv.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 May 2022 04:29:43 -0700 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Wed, 4 May 2022 04:29:41 -0700 Received: from blr-ubuntu-253.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Wed, 4 May 2022 04:29:37 -0700 From: Sai Prakash Ranjan To: , , CC: , , , , , , , , Sai Prakash Ranjan , "Bjorn Andersson" Subject: [PATCHv14 9/9] soc: qcom: geni: Disable MMIO tracing for GENI SE Date: Wed, 4 May 2022 16:58:28 +0530 Message-ID: X-Mailer: git-send-email 2.33.1 In-Reply-To: References: MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Disable MMIO tracing for GENI SE driver to prevent excessive logging. Any access over serial console would involve a lot of TX and RX register accesses (and few others), so these MMIO read/write trace events in these drivers cause a lot of unwanted noise because of the high frequency of such operations and it is not very useful tracing these events for such drivers. Given we want to enable these trace events on development devices (maybe not production devices) where performance also really matters so that we don't regress other components by wasting CPU cycles and memory collecting these traces, it makes more sense to disable these traces from such drivers. Also another reason to disable these traces would be to prevent recursive tracing when we display the trace buffer containing these MMIO trace events since writing onto serial console would further record MMIO traces. Cc: Bjorn Andersson Signed-off-by: Sai Prakash Ranjan --- drivers/soc/qcom/qcom-geni-se.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c index 28a8c0dda66c..a0ceeede450f 100644 --- a/drivers/soc/qcom/qcom-geni-se.c +++ b/drivers/soc/qcom/qcom-geni-se.c @@ -1,6 +1,9 @@ // SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. +/* Disable MMIO tracing to prevent excessive logging of unwanted MMIO traces */ +#define __DISABLE_TRACE_MMIO__ + #include #include #include