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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id EBAC7C5AE59 for ; Tue, 27 May 2025 00:27:05 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 890656B0085; Mon, 26 May 2025 20:27:05 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 867336B0088; Mon, 26 May 2025 20:27:05 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 757836B0089; Mon, 26 May 2025 20:27:05 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 55A8A6B0085 for ; Mon, 26 May 2025 20:27:05 -0400 (EDT) Received: from smtpin02.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id EB6851D4B2E for ; Tue, 27 May 2025 00:27:04 +0000 (UTC) X-FDA: 83486797968.02.311D8D4 Received: from NAM10-BN7-obe.outbound.protection.outlook.com (mail-bn7nam10on2067.outbound.protection.outlook.com [40.107.92.67]) by imf23.hostedemail.com (Postfix) with ESMTP id 3F548140007 for ; Tue, 27 May 2025 00:27:02 +0000 (UTC) Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=Nvidia.com header.s=selector2 header.b=bdB7fzk6; dmarc=pass (policy=reject) header.from=nvidia.com; spf=pass (imf23.hostedemail.com: domain of jgg@nvidia.com designates 40.107.92.67 as permitted sender) smtp.mailfrom=jgg@nvidia.com; arc=pass ("microsoft.com:s=arcselector10001:i=1") ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1748305622; a=rsa-sha256; cv=pass; b=UWI+Vj86R0cNa2pUi3+a4ZlkbJtYkAmL+oB002tiwnhCbqnTLzAZmCPG5w12Nzl+sU5j8Z MiV/a/f27pOLPBGY0K6t8d7SZGs8+NmlMKQkjGVFN8XQ3dfHAOXyMldHGQb8Tl2kT/rIM5 Ta3w8Liuzs0fyPK0mAIYZZukmGn0uSU= ARC-Authentication-Results: i=2; imf23.hostedemail.com; dkim=pass header.d=Nvidia.com header.s=selector2 header.b=bdB7fzk6; dmarc=pass (policy=reject) header.from=nvidia.com; spf=pass (imf23.hostedemail.com: domain of jgg@nvidia.com designates 40.107.92.67 as permitted sender) smtp.mailfrom=jgg@nvidia.com; arc=pass ("microsoft.com:s=arcselector10001:i=1") ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1748305622; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=ShDM+clk9upwE1ueL8ra8iP2EoLjVi6f+vUqU3Cdw3I=; b=W5b8H/veCXS2L7LKBePED3pTJ8K2CeqZIv/jVQOvneL0IwnBGheVfcUtaaROPyJ5DxLV8t SHWhEoNcXBwMPfIoRwHgJKpziOPcgBgYr4Qi/s7tAW884Vhy+yTCZ1I0kqJ0qaxdIyHVRA 7/MkA2fY5fVs4JTxnMpi1TGPim8PkJg= ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=MmrdC1MoexWj/DJ74NLsr7438pgTHrNyE2iC37agFh8tdc0QNMbo/bKfUg7BHmNEos/hArYlos/zBRN9Wkz4Uhrw2x8QEmgeUNgQitp/BVB/JZdmtTohq61yfsULVaRWbQ3uSZKIT4PO749SIFQaNluH/cIIQabW496FxXrKZGEy6jKHBPH6DX6QJ4H2UHQ02dOiHzAy9jkTqNNHufWYdhfgtxzeRUYFf/Fd8ih3aa1hCwfIYm4JrNY3okHAq1r/LJqU5a+bdQwk97zv6lwW31sgldDnu23ipoZVA5d0XxUfwnu92rGcmy8gbQv4nE6rLXV2RthpelFCYjkeZYN4Ww== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=ShDM+clk9upwE1ueL8ra8iP2EoLjVi6f+vUqU3Cdw3I=; b=E+vnrmxr3HI3E93Bs3oFLryzXJad7mLa+YmdP4lxP3ZgdBYctZ64VPBqeXgly0XI19a9ug3p0DNJyJbncBk0tIxGAJH30E34/ew1lbog0ZVvzgwwxHQVlRffRaVDHOW7MjhXhZGZ6zY+5BRh9Fjiex5Q9d8H55c4MzRNJFjnoKMYYjaZIuDKUAE5QXuOVdDfM5WCfqJKb1HzEQFWJZ51zpwkTZ/ClzhRmBkoPlEUVwS72MIZlQ59O9pXmFLm3NvpJV1UcLGiFNZ9hVygnMxFs1Dyxd37yeKnLizM/uSV6TG8MvQHLRSPnqEjdMDWQgiSue2pkRg1aMyiHnIBelTsLw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; 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=ShDM+clk9upwE1ueL8ra8iP2EoLjVi6f+vUqU3Cdw3I=; b=bdB7fzk65roXFattWEHSHNNFyV3+qfFCgoq12cBcpXfLiNOTIinWk+ORwEt07y5OGvnmshrRrj1Xp5dZYNS5yJD/IN4W0dbuBsiARJFufNHt1gzt6koqxJziFXMuk9s0LHf1GttqUwZr7iY6ZfDFQIrCPq0JMl91UwP+J6iqHoFjCqTaHWeIs9VhB3wXpQGlAFcStpLaSRHV5de1ejOqWvDxTz7Z3UUXhAMkBO90mJx86gEySrczAGhCOXBxIpM3xhCG2yJ9kepR7IGQITICjShqOMyExBSpgMvCglGpoPogH3/dFkKZ2Rr+x/9qIgNvUFehMeoW9Y3xIiJzqCzNRQ== Received: from CH3PR12MB8659.namprd12.prod.outlook.com (2603:10b6:610:17c::13) by CY3PR12MB9629.namprd12.prod.outlook.com (2603:10b6:930:101::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8769.24; Tue, 27 May 2025 00:26:53 +0000 Received: from CH3PR12MB8659.namprd12.prod.outlook.com ([fe80::6eb6:7d37:7b4b:1732]) by CH3PR12MB8659.namprd12.prod.outlook.com ([fe80::6eb6:7d37:7b4b:1732%6]) with mapi id 15.20.8769.022; Tue, 27 May 2025 00:26:53 +0000 Date: Mon, 26 May 2025 21:26:52 -0300 From: Jason Gunthorpe To: ankita@nvidia.com Cc: maz@kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, ryan.roberts@arm.com, shahuang@redhat.com, lpieralisi@kernel.org, david@redhat.com, aniketa@nvidia.com, cjia@nvidia.com, kwankhede@nvidia.com, kjaju@nvidia.com, targupta@nvidia.com, vsethi@nvidia.com, acurrid@nvidia.com, apopple@nvidia.com, jhubbard@nvidia.com, danw@nvidia.com, zhiw@nvidia.com, mochs@nvidia.com, udhoke@nvidia.com, dnigam@nvidia.com, alex.williamson@redhat.com, sebastianene@google.com, coltonlewis@google.com, kevin.tian@intel.com, yi.l.liu@intel.com, ardb@kernel.org, akpm@linux-foundation.org, gshan@redhat.com, linux-mm@kvack.org, ddutile@redhat.com, tabba@google.com, qperret@google.com, seanjc@google.com, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, maobibo@loongson.cn Subject: Re: [PATCH v6 3/5] kvm: arm64: New memslot flag to indicate cacheable mapping Message-ID: <20250527002652.GM61950@nvidia.com> References: <20250524013943.2832-1-ankita@nvidia.com> <20250524013943.2832-4-ankita@nvidia.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250524013943.2832-4-ankita@nvidia.com> X-ClientProxiedBy: BL6PEPF0001641F.NAMP222.PROD.OUTLOOK.COM (2603:10b6:22e:400:0:1004:0:f) To CH3PR12MB8659.namprd12.prod.outlook.com (2603:10b6:610:17c::13) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PR12MB8659:EE_|CY3PR12MB9629:EE_ X-MS-Office365-Filtering-Correlation-Id: 9270a877-42ed-45a0-a213-08dd9cb52dc3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|376014|7416014|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?1/VkNG4iFjsItvnXKnm4PcqW2SBOXpPVoHgZ7lp7dAjApRwlIy4ZMt9E8znz?= =?us-ascii?Q?USTfJBAG1MrQcOkQ/4TGALfUqB5Gu1R12bj7RoNFjo3LML1bnN/niwVbuXPx?= =?us-ascii?Q?+qBfwu4XzMthYvqQXzYTCxSbat61eaioE0spxuP3uZVQADL1Me8ia83d0S1U?= =?us-ascii?Q?T8x2M61qCVt3aT38GMKHP6+EQRNOE6+RuNFAq6MEXWbFqNhtqbhx+/C6/aYq?= =?us-ascii?Q?us7okptJ5dVJSMmCkWoKu/nUrDlmekUSx31a0Ikg9EAWMTT4PNrTU5uyGvNJ?= =?us-ascii?Q?jnjnUyLKbnoos6zLTapPO/RCt1xhfZFKQ2M0ptQ20bQ8Lm9rLK0M5wX0wPeL?= =?us-ascii?Q?/AqQWr7GScjPzCAlW7kQX9t0IhZsRvVZEWOEnOSspC12bHfluwmr2fjARxpN?= =?us-ascii?Q?gHCDRLlBAsWSsvE9e7zrFOWUj5+LouMGKxLYRzZrRIkDe+oqoV6q/Di0VX90?= =?us-ascii?Q?uiQwHWSuY5th28GB5d6e91hljbEulux3sZH7XEeoh7a96a/uXgiB0Fsj0FEr?= =?us-ascii?Q?oOia5mP9PeAwqk+BgzQSPuea4LGo/s94ILeKIRqhp+1OHBcS0VkXX4WVyfBD?= =?us-ascii?Q?wao4FCj5VJQqOrYI+W0Ozn2Lt+nc03stghFMLlzZC1yO1zflcOaoPlKUArPZ?= =?us-ascii?Q?N94MX/oUCL8iqDxIuncwwfdc+QDUzICAqyA5AnV9BDViOIshRje6g5AkqvuT?= =?us-ascii?Q?0pTcrZCtvaxasysNGNTyPLzkO6TLkEWV5Si+j6tLUyqWqCTHFZYB4ClSVhWP?= =?us-ascii?Q?+f38xHHne5mAovr7sD9cjzRZY0TiWmVGeqtsyqdBPyvcBYRuRpWkjeFJCkpf?= =?us-ascii?Q?x5mK4MAoLxexwKswFp3NM1YQKEL3m2RXtcHz4YbKUJpIARogspIunsBGoxX2?= =?us-ascii?Q?d9MFy7iRm0GPbxH97e3S5i+JbuIQyBDy9wwOxYSPUga8V2eFFNm99hRMo9iu?= =?us-ascii?Q?H52zivh7ubDZpnkysyVIBLstlZGQ5vW6NmJ+i9clAcb/Pya3/yy3DNmXRE37?= =?us-ascii?Q?ricqfzKc6dxqB1T9D4iKaKScB9TyH3/QsHgYS5ovFN/v2LtpQUaeeDNlE4j5?= =?us-ascii?Q?YIoGTplt2odOrjIMw4m0HpjFm9hGi+lRd49XNvL8elzF4F0cHO5F6qGtuGr8?= =?us-ascii?Q?3/VHGTuddGrKLscPPMMNwH1aB+6SodBiViAK/ArBKqxjJ4UCh4Lkco65En4V?= =?us-ascii?Q?vKLduKThDPzrGdLAZ1nhsKBUvIh0gihuunXCEQ5ebGk25V2mFcuvIrnJyaeN?= =?us-ascii?Q?zZ7H3FkZKJhdx35qAyirZEBdhEZSMFWf9ZVxqDP9Q8N/2On28SHpcxSx1qMd?= =?us-ascii?Q?udPCv1cQ5jdJ0IZwgBG2LDVgYSsjmUeQFvW+bXQx7qaSefByJBNqULx5OU5G?= =?us-ascii?Q?SgnUWbLzIxYt09dRWlotFpPT4AbUun8DZljr6kR3TcYp3csEzv5dyehyKGk3?= =?us-ascii?Q?G1aPCz4Jm/E=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CH3PR12MB8659.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(366016)(376014)(7416014)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?lcdSp3MQmWThgsc8SivHHvJUld7NJHGTHFZFPIqF/GVtXtIe72k65l/hzaVo?= =?us-ascii?Q?rnmTldKhSvr9OPp0bn1TPd+cBfXdRVnCZU+xW9teVFWVPEe4ciwUDgvpg1/I?= =?us-ascii?Q?PqEkfhZpNZCMjmBbEaNUzG8nFx2l+/CJQP/v8obj4yWRtsV0F4jaFM74e+BZ?= =?us-ascii?Q?+4p//FBRAIDp6dVshsCIbe5ZgsG63thyFVOL91PAPA72Dmcc9mMVZRSie02K?= =?us-ascii?Q?TtYVZ3l0RKwTKPb3OsffAbc5sKKiYRE0bmSNU/0iYVATZYCw7KrN8kTVaGO/?= =?us-ascii?Q?7Jt2Hq07lFHuySadxXTP2PDAtkZgO/xIqXadmgBUpdXfaL8kOWcnEtss7tC6?= =?us-ascii?Q?KjRX5kafxjX+dDB/KgvALuUau9aqYYtG3zcfOMTeJajiMJvMQiQkwNun3346?= =?us-ascii?Q?ArPq2A2GcmlK1fxh67FeHRYszEt70uCHVMYB3EyrFnD7jF40hGPgMM75EV1B?= =?us-ascii?Q?dVEf1VgWPWDto1O+jXOpkXXQuTB2i52Xi+5rrSOzubADScrUuqSw08fU1IQc?= =?us-ascii?Q?EIK2snqofrrYyv3LXfvFBDhtzc5KMgZqBNr2p4w9ouxPp8to4Iz1eUgTAMTz?= =?us-ascii?Q?8CF4f9jeTCUlB6XA0cWEARzbn/DiMtvH8fIgFD7EY3kknGpREl+dEXxs6kPR?= =?us-ascii?Q?z9k6sb0yiB72Eg2RJR3KUkWUHTJqoFRbtXkH5/PQgckpUQK7RFmjhmm/ES2h?= =?us-ascii?Q?SfbC2Ab7LsPH15Yb9/KtwijCQylITM/Cfk05SFnqNEeyOhWpOVPA/lSoaV2e?= =?us-ascii?Q?NCEDorQq1BLk3hlwqmCBgOcEC7ipRbDcXZsQklhr8mHjFNRLtTwA8QtObF9b?= =?us-ascii?Q?KqHOp8MrSD+WjOog1TtodJY2NP2LBs651UjFSeIhFNFGKquvLZSgh0Mc3f4Y?= =?us-ascii?Q?OkrBV1wxFdtYdHvlD3+6GvsXeaf6YBRLjqM3kZrmqCCSqG9CsrDWQgOFa0Ru?= =?us-ascii?Q?xIUkQgxwBoA6Be+XKElT/L2iTstmGjB2OSl3aMqpXXJ0988xiCK7HyRU3hST?= =?us-ascii?Q?obIBG01FLzf/v93ONjaoJpoVeYzi8dboDE9NFKroU0vasGpbzUxt+bdUYmv3?= =?us-ascii?Q?0djivywKYHQtrN5loiZlIt9Fc52gMHT9bOjakwK7tX4rkj1MX3sku5pyFP/I?= =?us-ascii?Q?KCeZhDC394pawbcbbyaPoG7VS2WP2d14/qGRZxM1aH6zuDJjTPYS7ybMqjSd?= =?us-ascii?Q?HMlZcSYoL2KpWNSlLDWfq8wq1/jxd3ieNTtAgsUgqRX8t5zO9WdDfz6jnadI?= =?us-ascii?Q?wCCCKiSo3MaJ5FEHu41GYkhIIqrKtX8jd/SiNR6aAk3gK5RFPppDBbJp6zTV?= =?us-ascii?Q?1gkDfO8Omdoa5SQ79SgRiSIn4iCEjtd8b2P9wp4gr+QYfaUBGRjHUYnIrEc3?= =?us-ascii?Q?rodfuVY0dRUWc5VEyf8lIHgTHWMnSO+PjDd6UmQ0WBdgRcLSP72J2pCNlUmM?= =?us-ascii?Q?hteikAooTl03lj0u+V8Y+MWgjOEPNI6HGsh3ZCWxMr4qyF2D7J4Xumhvvfh/?= =?us-ascii?Q?SQIjqxZG5WYNlIUXV4NBF1tgila/OS4Xp7RpwVUpgbYCMfWiyXRv8DaR4HVa?= =?us-ascii?Q?4WAfA6pRotlsq8h9VRpAzr1ZzQa6BxKGx6FeoUeO?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9270a877-42ed-45a0-a213-08dd9cb52dc3 X-MS-Exchange-CrossTenant-AuthSource: CH3PR12MB8659.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 May 2025 00:26:53.0928 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: USznFtW/E5icdPHB8CP8syRDYGy/I8mMIZtLb01lJ9MTj56bQtPGFSHqedGhYMPT X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY3PR12MB9629 X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 3F548140007 X-Stat-Signature: rih8o5fzn8bszygpxfpe63873zniicrf X-Rspam-User: X-HE-Tag: 1748305622-147601 X-HE-Meta: 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 ZXFwLTYv 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sat, May 24, 2025 at 01:39:41AM +0000, ankita@nvidia.com wrote: > From: Ankit Agrawal > > Introduce a new memslot flag KVM_MEM_ENABLE_CACHEABLE_PFNMAP > as a tool for userspace to indicate that it expects a particular > PFN range to be mapped cacheable. > > This will serve as a guide for the KVM to activate the code that > allows cacheable PFNMAP. > > CC: Oliver Upton > CC: Catalin Marinas > CC: Jason Gunthorpe > Suggested-by: Marc Zyngier > Signed-off-by: Ankit Agrawal > --- > include/uapi/linux/kvm.h | 1 + > virt/kvm/kvm_main.c | 3 ++- > 2 files changed, 3 insertions(+), 1 deletion(-) I thought we agreed not to do this? Sean was strongly against it right? There is no easy way for VFIO to know to set it, and the kernel will not allow switching a cachable VMA to non-cachable anyhow. So all it does is make it harder to create a memslot. Jason