From patchwork Tue Apr 18 06:46:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Souradeep Chowdhury X-Patchwork-Id: 13215081 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 14894C77B76 for ; Tue, 18 Apr 2023 06:47:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; 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Tue, 18 Apr 2023 06:46:27 GMT Received: from blr-ubuntu-525.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 15.2.986.42; Mon, 17 Apr 2023 23:46:23 -0700 From: Souradeep Chowdhury To: Andy Gross , Konrad Dybcio , Krzysztof Kozlowski , Bjorn Andersson , Rob Herring CC: , , , , Sibi Sankar , Rajendra Nayak , Souradeep Chowdhury Subject: [PATCH V5 0/3] soc: qcom: boot_stats: Add driver support for boot_stats Date: Tue, 18 Apr 2023 12:16:02 +0530 Message-ID: X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: 6I4te8WFczQ8qznN8Lej4vZgMZ77QYY7 X-Proofpoint-ORIG-GUID: 6I4te8WFczQ8qznN8Lej4vZgMZ77QYY7 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-18_03,2023-04-17_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 spamscore=0 suspectscore=0 impostorscore=0 phishscore=0 mlxlogscore=991 clxscore=1015 priorityscore=1501 mlxscore=0 bulkscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304180062 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230417_234638_528378_FFC12DC2 X-CRM114-Status: GOOD ( 20.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Qualcomm's proprietary Android boot-loaders capture boot time stats, like the time when the bootloader started execution and at what point the bootloader handed over control to the kernel etc. in the IMEM region. This information is captured in a specific format by this driver by mapping a structure to the IMEM memory region and then accessing the members of the structure to log the information in a debugfs file. This information is useful in verifying if existing boot KPIs have regressed or not. A sample log in SM8450(waipio) device is as follows:- /sys/kernel/debug/146aa6b0.boot_stats # cat abl_time 17898 ms /sys/kernel/debug/146aa6b0.boot_stats # cat pre_abl_time 2879 ms The Module Power Manager(MPM) sleep counter starts ticking at the PBL stage and the timestamp generated by the sleep counter is logged by the Qualcomm proprietary bootloader(ABL) at two points-> First when it starts execution which is logged here as "pre_abl_time" and the second when it is about to load the kernel logged as "abl_time". Both these values are read up by the driver from IMEM region and printed as above. Changes in V5 *Fixed the build warning in V4 of the patch. Souradeep Chowdhury (3): dt-bindings: sram: qcom,imem: Add Boot Stat region within IMEM soc: qcom: boot_stat: Add Driver Support for Boot Stats MAINTAINERS: Add the entry for boot_stats driver support Documentation/ABI/testing/debugfs-driver-bootstat | 17 ++++ .../devicetree/bindings/sram/qcom,imem.yaml | 22 +++++ MAINTAINERS | 7 ++ drivers/soc/qcom/Kconfig | 9 ++ drivers/soc/qcom/Makefile | 1 + drivers/soc/qcom/boot_stats.c | 101 +++++++++++++++++++++ 6 files changed, 157 insertions(+) create mode 100644 Documentation/ABI/testing/debugfs-driver-bootstat create mode 100644 drivers/soc/qcom/boot_stats.c --- 2.7.4