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 X-Spam-Level: X-Spam-Status: No, score=-5.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 42D74C433B4 for ; Mon, 3 May 2021 12:12:58 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 955E061186 for ; Mon, 3 May 2021 12:12:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 955E061186 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:CC:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=PHna47XKCq8H7WY1DAKQfYdQR5o7Zxdvcve+m8P/xvc=; b=pG4TTeY0K2uS7gy88NFOwu9Kp jGg+BEcyDpIlN+aokDhq3wFb8ZqRfq33EbuyX6F2CukyuB9nIr6EWLzQcbzSfM3x4uRsLCc2zxRAM NuQMqv1DWhrC7lKo/BR+M2wyebgPhqaGTdnEZtacmvr2qTJuw5kqZOWR52YK+vTSJvBi68vDzl+QO LB8FuPAoleSbQyI/ZLfiEOC7OppprmmW0d9LSw5UmDkVe1bJobWQ8ygT1ZG0zuh5A+a62fUMoa7lB uT1Q0m1720OzVAiYZrs3+Cs52gSByDBQS7aGThI8/SaxyloXadIqrMmDbhYzAuE/33MGkVRcm4Ry8 StN8rhnPA==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1ldXOi-00DpTw-C7; Mon, 03 May 2021 12:10:00 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1ldXNB-00DpIu-Ji for linux-arm-kernel@desiato.infradead.org; Mon, 03 May 2021 12:09:03 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: Content-Type:In-Reply-To:MIME-Version:Date:Message-ID:From:References:CC:To: Subject:Sender:Reply-To:Content-ID:Content-Description; bh=Okk0d8HxcNPcwhwIKMcT2nO57+6T0VR68IWu0Ahzh5Q=; b=nmRDanP6Dd1LlutFnfGvlQkD4+ e4YICcB2h4EaPw7kKHFWOdp/i34MakBdbw1TW2nuDM5TK952e37zrC4+Faqr5MbT2wM1f9H04VzgD Qks/5stfXPhSAYjcRO2TzKYV8EArxw2c1VlrJuepLjJvMuq/H31WUXXIcxiec2yPURVuMvYkxL6gU 6h2CQDso5PpI5iru1xLE6/N0qPUdd5IObeB+mrEBvczVkXWw9QBT5ye0SUaZK7wIp+wL1QrKH/OYL Low9OQRsHTbboV4k1O8qPffZe46PD2p/ERGZm5UZxqpLDqwe/TwJnhr8q4bDn3YsWiwj1a1g4uveM pbQ4HB5w==; Received: from mail-bn8nam12on2069.outbound.protection.outlook.com ([40.107.237.69] helo=NAM12-BN8-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1ldXN8-0032c4-VU for linux-arm-kernel@lists.infradead.org; Mon, 03 May 2021 12:08:24 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=NfivL4a7ZjuKmNNJfAmGAXvVbryz/0NIuduouqFHcJx8qRmjIkhG9WkksmIomvw/TUJCq7SylG1nSN3tGIklmuR+PtvXMPco0hf/Tmy3Vz042F9OhbPD3ryx1odYbXlkdFWwuip1yAPnm8U2lkXrwf0rjFHUCdDTBM6Oi9LafiXa5Zhh5WH/2AJBdggTzqGPU5+19tzKSVJcvrgr9xtZRhPJYQta6kyKigHuXjivVTa3lAbX5E6Bpp7Ua+Jt+m2FbWI5Ksm3HOMvZ9ST+MKTSpnQjKmV0zBpgWQKGuXV3nzSWk1hrbWd967r6UmFx01M948vUltNQ0ee/PdnzEYCUw== 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=Okk0d8HxcNPcwhwIKMcT2nO57+6T0VR68IWu0Ahzh5Q=; b=ODaYepuppYCImSntXTth/4AriJqOUU2bg3RhsaxXAWEM38SLuyNwjk7Enr1+PlVpCuex3G6iTcG1uLv4ce0fTIXhUEIzkHtRLIFWP+kUNSpxJ++COKiezM3frJA4N5OU9zLgRHE5OEbtfbHuI9NXZl1DtHq33qPeStnAGpH2BdORSeTlOvOpsbRRlHkwoQI23vFfXHtSVks3ffZhGEbriTdeFn9BJ2rZU8ORBxpSv91Tu5t4NmC3vhl9t+zwMglzWobMBhguHgWFBP+c+RSyMNWARcE6j03DgGHQI0CJkJ5fDsHcpTKNiQGXZ1MW/usSCpi+sv/UEeC7T8+xPZSWbw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 216.228.112.34) smtp.rcpttodomain=kernel.org smtp.mailfrom=nvidia.com; dmarc=pass (p=none sp=none pct=100) action=none header.from=nvidia.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Okk0d8HxcNPcwhwIKMcT2nO57+6T0VR68IWu0Ahzh5Q=; b=fZpCAzRpklcMd9lIsuVHoJ+tEnO3ifDSZkOvGmdpG4FMKtJQdvcoPBRZM5zmQVny82TtiPvAPITuCcQulkdUa2k2z6ZYkf4X5cYQtDNqHzdmp6g6Zbo2l63mQpb6ZI8GgDX5YIEdDvBibpHgb61zhx3M19GvO6oISDDuZPSYjApgG4LOZuiWUayRDKTCV/2csvroTT2I3wBgJ4+J6z29YVza/XLYFfLPKhvWWsqX2yhwO+SEnDpvPvSyuinGCJjp+WKZlWjazwqtNAKV/Z6zg/MHuTM71D/Gbss8pB77yUZC5abcVw2PRl4mKRe+MNIEs8eRF2UnBoJMABnXrHuBdA== Received: from BN6PR22CA0040.namprd22.prod.outlook.com (2603:10b6:404:37::26) by DM6PR12MB2828.namprd12.prod.outlook.com (2603:10b6:5:77::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4087.40; Mon, 3 May 2021 12:08:18 +0000 Received: from BN8NAM11FT064.eop-nam11.prod.protection.outlook.com (2603:10b6:404:37:cafe::24) by BN6PR22CA0040.outlook.office365.com (2603:10b6:404:37::26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4087.25 via Frontend Transport; Mon, 3 May 2021 12:08:18 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 216.228.112.34) smtp.mailfrom=nvidia.com; kernel.org; dkim=none (message not signed) header.d=none;kernel.org; dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.112.34 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.112.34; helo=mail.nvidia.com; Received: from mail.nvidia.com (216.228.112.34) by BN8NAM11FT064.mail.protection.outlook.com (10.13.176.160) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.4087.27 via Frontend Transport; Mon, 3 May 2021 12:08:18 +0000 Received: from [10.20.22.163] (172.20.145.6) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 3 May 2021 12:08:17 +0000 Subject: Re: [RFC 1/2] vfio/pci: keep the prefetchable attribute of a BAR region in VMA To: Marc Zyngier CC: Vikram Sethi , Alex Williamson , Will Deacon , Catalin Marinas , Christoffer Dall , "linux-arm-kernel@lists.infradead.org" , "kvmarm@lists.cs.columbia.edu" , "linux-kernel@vger.kernel.org" , "kvm@vger.kernel.org" , Jason Sequeira References: <20210429162906.32742-1-sdonthineni@nvidia.com> <20210429162906.32742-2-sdonthineni@nvidia.com> <20210429122840.4f98f78e@redhat.com> <470360a7-0242-9ae5-816f-13608f957bf6@nvidia.com> <20210429134659.321a5c3c@redhat.com> <87czucngdc.wl-maz@kernel.org> <1edb2c4e-23f0-5730-245b-fc6d289951e1@nvidia.com> <878s4zokll.wl-maz@kernel.org> <87eeeqvm1d.wl-maz@kernel.org> <49e26646-9f05-ccb8-f5c1-73a92ab79972@nvidia.com> <87czu8uowe.wl-maz@kernel.org> From: Shanker R Donthineni Message-ID: <22e592c5-58e5-5456-311d-3d23303a91ac@nvidia.com> Date: Mon, 3 May 2021 07:08:15 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <87czu8uowe.wl-maz@kernel.org> Content-Language: en-US X-Originating-IP: [172.20.145.6] X-ClientProxiedBy: HQMAIL107.nvidia.com (172.20.187.13) To HQMAIL107.nvidia.com (172.20.187.13) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 1ba67fa3-f649-435e-bb63-08d90e2c2381 X-MS-TrafficTypeDiagnostic: DM6PR12MB2828: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4714; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.112.34; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:schybrid03.nvidia.com; CAT:NONE; SFS:(4636009)(376002)(346002)(39860400002)(136003)(396003)(36840700001)(46966006)(16526019)(186003)(31686004)(7636003)(2616005)(86362001)(2906002)(4326008)(356005)(53546011)(16576012)(316002)(82740400003)(36756003)(26005)(82310400003)(426003)(4744005)(8676002)(107886003)(54906003)(36906005)(336012)(6916009)(5660300002)(70206006)(36860700001)(478600001)(8936002)(31696002)(70586007)(47076005)(43740500002); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 May 2021 12:08:18.4931 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1ba67fa3-f649-435e-bb63-08d90e2c2381 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.112.34]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT064.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB2828 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210503_050823_247268_D9979D76 X-CRM114-Status: GOOD ( 10.13 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Marc, On 5/3/21 4:50 AM, Marc Zyngier wrote: > You are mixing two things: what Linux/arm64 gives to kernel drivers, > and what KVM, as an implementation of the ARMv8 architecture, gives to > virtual machines. There is zero reason for the two to match if there > is no definition of what we need to provide. Suggestion here is memory-types PROT_NORMAL_NC and PROT_DEVICE_nGnRE are applicable to braemetal only and don't use for device memory inside VM. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel