From patchwork Thu Apr 9 08:22:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peng Fan X-Patchwork-Id: 11481421 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7B702112C for ; Thu, 9 Apr 2020 08:30:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4824920784 for ; Thu, 9 Apr 2020 08:30:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=nxp.com header.i=@nxp.com header.b="Ho+Unou0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726597AbgDIIax (ORCPT ); Thu, 9 Apr 2020 04:30:53 -0400 Received: from mail-eopbgr40060.outbound.protection.outlook.com ([40.107.4.60]:15185 "EHLO EUR03-DB5-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725828AbgDIIax (ORCPT ); Thu, 9 Apr 2020 04:30:53 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=itgO6Yl2q9bzKzCoEOJnnhRpG85pF4sIkb+Xi0cIMhje3yYr0z/Bav4FZsdKE54cp2oBnMULtc2j/ScletKliht4Gy8XpdU0+d0eet09Kw0VbXbFKbFSqdu9/oCkuvWpVvxvd/Y1Jeu+2GJE4EZH406vkSybrjZy8vqjnHodEmpjph38EOnfN598ohHrT+uDn4iA5gPX+Se9qpNxL1SC4qD15crkFpoz1yzN6zH/pgi+UgJLc77j07PuGWq1phA0hOYdJO5uVskbB3F4ENIL1e/hjX0t/YCn40QfB25QEVo4RT8hxqxvuiOIRD2qwLvvHhx02FePBpmD2S9ipGcKmw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=r62mWGqiCmsuodBLyS/TbQ8Z47ejeC7MuH4KnTENGoI=; b=lgXz9XQ5pYm5xDwzrRYllwPQPNoGxmbOz6E6pCH5RYknQdqkQwEI68I8HXf2w3yo3PR2SFiOj2kFpHcZD65Tk0logn9sQhI0s82LKPKyX7fMP+7kBAvJjQeWIzYiWRKctGRYbLPme24rnpRWtmKaRVKTfxr9bNonqpC9DXpwaf8Gpt0C/5u7GI+zybP1a4fO7mmNqPydFEK5zpr5FAIZ2YzS0ZmGC2MGk5y74rgrCk2rI0x+AWOOcnE0b0TBmL5Y5Wz0JWJ2EDYtPcuOhsYWStSwnnyxIATQCH4DxJK4bLuOcaSXlcvuYRZ5ZhiY/JUDNu/jYSoLH0GmUz8IPDIO1w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=r62mWGqiCmsuodBLyS/TbQ8Z47ejeC7MuH4KnTENGoI=; b=Ho+Unou0DfnKD49EfHUfkNgPcdA+s8Jpam5iM1sA6/ZzURgeA6AjC0mMt2E7/ORY5L5WNBPhrYnt9+B9Cw5PW4KArZ4iQf1D1Aj8cbSk4EWDyDUEiPdUCNSLo2oLKyzHc//ji4jzqB5OQdB7v3d/lgqKPpRiErNWOSodXhF9Gp0= Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=peng.fan@nxp.com; Received: from AM0PR04MB4481.eurprd04.prod.outlook.com (2603:10a6:208:70::15) by AM0PR04MB6626.eurprd04.prod.outlook.com (2603:10a6:208:176::27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2900.15; Thu, 9 Apr 2020 08:30:49 +0000 Received: from AM0PR04MB4481.eurprd04.prod.outlook.com ([fe80::ad44:6b0d:205d:f8fc]) by AM0PR04MB4481.eurprd04.prod.outlook.com ([fe80::ad44:6b0d:205d:f8fc%7]) with mapi id 15.20.2900.015; Thu, 9 Apr 2020 08:30:49 +0000 From: Peng Fan To: bjorn.andersson@linaro.org, ohad@wizery.com Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-imx@nxp.com, Peng Fan Subject: [PATCH 1/2] remoteproc: drop memset when loading elf segments Date: Thu, 9 Apr 2020 16:22:51 +0800 Message-Id: <1586420572-28353-1-git-send-email-peng.fan@nxp.com> X-Mailer: git-send-email 2.7.4 X-ClientProxiedBy: SG2PR01CA0133.apcprd01.prod.exchangelabs.com (2603:1096:4:8f::13) To AM0PR04MB4481.eurprd04.prod.outlook.com (2603:10a6:208:70::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (119.31.174.66) by SG2PR01CA0133.apcprd01.prod.exchangelabs.com (2603:1096:4:8f::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.2900.15 via Frontend Transport; Thu, 9 Apr 2020 08:30:46 +0000 X-Mailer: git-send-email 2.7.4 X-Originating-IP: [119.31.174.66] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: e1a87978-b1a2-4e7f-ae33-08d7dc604e84 X-MS-TrafficTypeDiagnostic: AM0PR04MB6626:|AM0PR04MB6626: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:7691; X-Forefront-PRVS: 0368E78B5B X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM0PR04MB4481.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFTY:;SFS:(10009020)(4636009)(346002)(376002)(396003)(136003)(366004)(39860400002)(6486002)(86362001)(478600001)(44832011)(316002)(2906002)(6666004)(36756003)(6506007)(66946007)(66556008)(52116002)(66476007)(16526019)(81156014)(26005)(186003)(8936002)(8676002)(956004)(5660300002)(6512007)(81166007)(4326008)(2616005)(69590400007);DIR:OUT;SFP:1101; Received-SPF: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData: C0fAcnpNh53lA2gx1OxrGFLMR4cAPLyL2Z5ktLlQd2db+6EpkEUCNTxqG65G6l5BJBYIHX9kjDLC88g0LnAHunNHphXBq64bKvNTPT3gwLiXeBM95ISf9mFojJlheMb/8Qw1T9Py62nPmbZBLZWxqg== X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: e1a87978-b1a2-4e7f-ae33-08d7dc604e84 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Apr 2020 08:30:49.1592 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: fu2aQLGtfypnF4wLZR5CcTX6hmrSsAza6vjdCXjj1nfIq7NXdeL2KCrIMNhmXSw10Kt+2NAc73gqpuQ6W064Hg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR04MB6626 Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org To arm64, "dc zva, dst" is used in memset. Per ARM DDI 0487A.j, chapter C5.3.8 DC ZVA, Data Cache Zero by VA, "If the memory region being zeroed is any type of Device memory, this instruction can give an alignment fault which is prioritized in the same way as other alignment faults that are determined by the memory type." On i.MX platforms, when elf is loaded to onchip TCM area, the region is ioremapped, so "dc zva, dst" will trigger abort. Since memset is not strictly required, let's drop it. Signed-off-by: Peng Fan --- drivers/remoteproc/remoteproc_elf_loader.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c index 16e2c496fd45..cc50fe70d50c 100644 --- a/drivers/remoteproc/remoteproc_elf_loader.c +++ b/drivers/remoteproc/remoteproc_elf_loader.c @@ -238,14 +238,11 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw) memcpy(ptr, elf_data + offset, filesz); /* - * Zero out remaining memory for this segment. + * No need zero out remaining memory for this segment. * * This isn't strictly required since dma_alloc_coherent already - * did this for us. albeit harmless, we may consider removing - * this. + * did this for us. */ - if (memsz > filesz) - memset(ptr + filesz, 0, memsz - filesz); } if (ret == 0)