From patchwork Thu Feb 2 09:28:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mukesh Ojha X-Patchwork-Id: 13125597 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 1AC3CC636D4 for ; Thu, 2 Feb 2023 09:28:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231434AbjBBJ2c (ORCPT ); Thu, 2 Feb 2023 04:28:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231478AbjBBJ21 (ORCPT ); Thu, 2 Feb 2023 04:28:27 -0500 Received: from alexa-out-sd-02.qualcomm.com (alexa-out-sd-02.qualcomm.com [199.106.114.39]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91A2816309; Thu, 2 Feb 2023 01:28:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1675330102; x=1706866102; h=from:to:cc:subject:date:message-id:mime-version; bh=La3wj2SGvz7TU9s+j9pQj9x3EPVU8m3Fuv9USC0qvtA=; b=h1kAJDfNhz0qd6EBkWwKviGFF3z33EIQwfmpG8Oq2fAubzyBYQdKfkk3 KnfTYNvVmOufWe/goEV138FFsaRFWCSqQKGHt2CvL3mNrbbE8y/YGFCTl 8tKATc0q8zW+rzi0gj9CXk+heVtRdRw63i/hGgpWEqQNKnUYVyKrwMbwu Y=; Received: from unknown (HELO ironmsg04-sd.qualcomm.com) ([10.53.140.144]) by alexa-out-sd-02.qualcomm.com with ESMTP; 02 Feb 2023 01:28:17 -0800 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.45.79.139]) by ironmsg04-sd.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Feb 2023 01:28:17 -0800 Received: from hu-mojha-hyd.qualcomm.com (10.80.80.8) by nasanex01c.na.qualcomm.com (10.45.79.139) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Thu, 2 Feb 2023 01:28:14 -0800 From: Mukesh Ojha To: , , , CC: , , , , , , Mukesh Ojha Subject: [PATCH v5 1/2] dt-bindings: ramoops: Add support to get the region dynamically Date: Thu, 2 Feb 2023 14:58:00 +0530 Message-ID: <1675330081-15029-1-git-send-email-quic_mojha@quicinc.com> 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 nasanex01c.na.qualcomm.com (10.45.79.139) Precedence: bulk List-ID: X-Mailing-List: linux-hardening@vger.kernel.org The reserved memory region for ramoops is assumed to be at a fixed and known location when read from the devicetree. This is not desirable in an environment where it is preferred the region to be dynamically allocated at runtime, as opposed to being fixed at compile time. So, update the ramoops binding by using some reserve memory property to allocate the ramoops region dynamically. Signed-off-by: Mukesh Ojha --- Changes in v5: - Updated the commit description. - Removed example from yaml file. Changes in v4: - Addressed comment made by Krzysztof on ramoops node name. Changes in v3: - Fixed yaml error and updated commit text as per comment. Change in v2: - Added this patch as per changes going to be done in patch 3/3 .../devicetree/bindings/reserved-memory/ramoops.yaml | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/reserved-memory/ramoops.yaml b/Documentation/devicetree/bindings/reserved-memory/ramoops.yaml index 0391871..51b6003 100644 --- a/Documentation/devicetree/bindings/reserved-memory/ramoops.yaml +++ b/Documentation/devicetree/bindings/reserved-memory/ramoops.yaml @@ -10,7 +10,8 @@ description: | ramoops provides persistent RAM storage for oops and panics, so they can be recovered after a reboot. This is a child-node of "/reserved-memory", and is named "ramoops" after the backend, rather than "pstore" which is the - subsystem. + subsystem. This region can be reserved both statically or dynamically by + using appropriate property in device tree. Parts of this storage may be set aside for other persistent log buffers, such as kernel log messages, or for optional ECC error-correction data. The total @@ -112,7 +113,13 @@ unevaluatedProperties: false required: - compatible - - reg + +oneOf: + - required: + - reg + + - required: + - size anyOf: - required: [record-size]