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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 041D7C433E0 for ; Thu, 18 Jun 2020 23:32:51 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 C22432067D for ; Thu, 18 Jun 2020 23:32:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=epam.com header.i=@epam.com header.b="JumNNtQQ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C22432067D Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=epam.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jm41O-0000D7-Qj; Thu, 18 Jun 2020 23:32:38 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jm41N-0000D1-7V for xen-devel@lists.xenproject.org; Thu, 18 Jun 2020 23:32:37 +0000 X-Inumbo-ID: fd5bcba4-b1bb-11ea-bca7-bc764e2007e4 Received: from EUR02-VE1-obe.outbound.protection.outlook.com (unknown [40.107.2.42]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id fd5bcba4-b1bb-11ea-bca7-bc764e2007e4; Thu, 18 Jun 2020 23:32:36 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=SIHikpxl1ZW4T/vNKEKLhVhunksozaIlIhG9VUla23z1tpJLbrsOV2plvwxfCYd227Nf2ahl2dT7Q+XdAh3RPgM3ICVC0Cxpcr1O4fAclTbLj8LiVs35hJtMa11tDchOcwRp2S1Bex3ncLqd9uqiWWBLMFtKTL2cEnsJUykaHYTVyKFB740pojIyevAVXDdInwA1yP8CueZ6qo0HNJQefhK3AK54WGB9Mbb7F9id4a5Yy3VRs/U05EGzbrJfsXO+EsqV/QXF3/a2vqrIgsl0zEc1pl2epU2EZ3pr/QWhIQtzlAHMH8LRYdg/YcsLsCQHwp14/WJ1FGY2HLrB9wTRxQ== 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=e7hZM8c+yFgdJK1pVUcrcRMzanV6KtMbZ2wsOksde2w=; b=f+zHVpkHAtNfeDz3totfozPP1JJtty14bksJcf4Kekm0fUISURX6HFrIj244WdSS2EXrzToIipc70/WhX7wxqTyytcxGz8I0DGa1e382TjlLTNe/EHmEmC1GWNfe+1Xts4JFkWV8g30KuukoBvfgf6QK/qD3SdUdcbWoxBouF3boaVUlE0B8mkZolTskydtkia4Gt1HlVdvhwS4uUwBZu8E+upznsY8+N/2Wk+1P9yB35NXoXJcV4DWQ1NjBczOxpVScl9ozil279ssE3JCo9TmL7V5UxoYfpyL2nOv4LP4TiBsLxwYYFCBIJa080Thxhs2h1akf+yBxXxNZkn9w9w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=epam.com; dmarc=pass action=none header.from=epam.com; dkim=pass header.d=epam.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=epam.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=e7hZM8c+yFgdJK1pVUcrcRMzanV6KtMbZ2wsOksde2w=; b=JumNNtQQ6FsONdwCOq8h8bEhrjzvap5qWSnFMl73aNkSlZN89ZQzOnmATvZkZoHWN5hpunE+YQ1wGfpg03TXHEqThsOm6GmeCspSGePypVija/KUNVflEDS5vKYrMEgeepVF6TkhZWA/acHuhDIJ/AO4YUya1SUVq1JZXJZQljwKrZOqkjXv+0CcFZtOCjW/aaBAq5jaRIIxhpDEPCHFGaZStl5xB1zcXFBZgq50WPHg2tFuFr0T0cgdGAYG0zKDKv/6NPAPVsqvgCyLrL0F4Wnh8bcP6uzL4qmhzi3a/vZMAjNDioZ1Uh29v78G7KL9Ma1UvHDReIIGjEUswoRS/w== Received: from VI1PR03MB2926.eurprd03.prod.outlook.com (2603:10a6:802:35::28) by VI1PR03MB5005.eurprd03.prod.outlook.com (2603:10a6:803:b7::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3109.22; Thu, 18 Jun 2020 23:32:34 +0000 Received: from VI1PR03MB2926.eurprd03.prod.outlook.com ([fe80::95fd:55d9:421b:1f37]) by VI1PR03MB2926.eurprd03.prod.outlook.com ([fe80::95fd:55d9:421b:1f37%7]) with mapi id 15.20.3088.028; Thu, 18 Jun 2020 23:32:34 +0000 From: Volodymyr Babchuk To: Stefano Stabellini Subject: Re: [PATCH] xen/arm: optee: allow plain TMEM buffers with NULL address Thread-Topic: [PATCH] xen/arm: optee: allow plain TMEM buffers with NULL address Thread-Index: AQHWLLcTxhZtogukPEOG78aedSZTLajL0lyAgBNTToCAABJigA== Date: Thu, 18 Jun 2020 23:32:34 +0000 Message-ID: <871rmc2bn2.fsf@epam.com> References: <2a32c7c2048333169c9378194d6a435e2e7ed2d7.camel@epam.com> <1b596a11-95b5-3e87-bbf5-c0c4dceb6489@xen.org> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: mu4e 1.4.10; emacs 26.3 authentication-results: kernel.org; dkim=none (message not signed) header.d=none;kernel.org; dmarc=none action=none header.from=epam.com; x-originating-ip: [176.36.48.175] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: bd550ef5-9a10-4c6d-a38a-08d813dfe0cb x-ms-traffictypediagnostic: VI1PR03MB5005: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:10000; x-forefront-prvs: 0438F90F17 x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: rzb9BgE26ZRg+FoY1M6xMjggH52/Eh+RROdUpKOJLquiMQCsJvBRyeWwqbMYDbgGQim//buIGjDadex8XpxFgYP1v1lmbBvWoJ7M60vExKuPEqu1TYg+Tcthg7r8EQXABPtAgYOeS9N/rM+CpyGI1UeQZSjUtcXsLE88SqqImUYAH6yPr7dGHxYIbpWMpI5zCHXvf4qmyCVJcTGmd1d1SiiuV9Wh40Pbp8F0oJ8ajksM+9itOcI71jg3pCSG8Ld4yM0qo6DQbSst1O7rVS4nagknd9PVMXKRonrnfX6bhdACMo9QYh7d7WGXasoiuqKYlYTSVnknyaJKrDiAkMG/5A== x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:VI1PR03MB2926.eurprd03.prod.outlook.com; PTR:; CAT:NONE; SFTY:; SFS:(4636009)(39860400002)(376002)(346002)(136003)(396003)(366004)(2906002)(6506007)(26005)(6486002)(5660300002)(8936002)(8676002)(71200400001)(55236004)(186003)(36756003)(4326008)(6916009)(66946007)(86362001)(54906003)(316002)(4744005)(478600001)(76116006)(91956017)(66476007)(64756008)(66556008)(2616005)(66446008)(6512007); DIR:OUT; SFP:1101; x-ms-exchange-antispam-messagedata: YzMe4UQAbMOSRi/lhioQmhZNjUlgNYR/fjATCQx6icSlLlwK2ww/hhGDKBN9YQNaPFlx11mHDB6Xhu+R5+ELpXpwBgNC0VfhCJLahz7hJTpa5r9/XV43is4dPr9e4YAKtuYXh+t4j15kYo69TEHpIh7BAqLVsoDHvemMH+j7LzVlosffCZPiwDknYOpvGbDxI8DM2Y2kTi6LTrPt9b4zYgitR5mDiDAmdx+7Jraoq7AGDmddqO6KC2TAsnTgQsmAwpQmZtBOFkobB5q0t8jWmKt4BBJU4z01n//sdCf2mGCVcTWu/Q+A70+bfpIek8oMUVbbLjg6e3k5rGxy9PdUW0GkeqSK0vQq/iBXhRrit5JD9pYQB8ddErWl6/2f6h6zGHNiIR+oC3IJZffFFs4uqPhmfQUDZSXKIOIX+pgqB91cLBzIdxOqKeHisqAHpXBjklp7+xzMM/imEvn0nd1lf9ncLRJnQ+e9NKbg1VjYyN0= x-ms-exchange-transport-forked: True Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: epam.com X-MS-Exchange-CrossTenant-Network-Message-Id: bd550ef5-9a10-4c6d-a38a-08d813dfe0cb X-MS-Exchange-CrossTenant-originalarrivaltime: 18 Jun 2020 23:32:34.1442 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b41b72d0-4e9f-4c26-8a69-f949f367c91d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: bRmg1Fmn9LXOzcVlhsvEVqg/8Trfp0LDk2DtqYl4MY5DbYXXR4xI3VJGoeJl/8XT1cvVhn1eEGX2ww1nJVgffNWJXZCeDUU8y2YyNjP4YoE= X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR03MB5005 X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: "xen-devel@lists.xenproject.org" , "pdurrant@amazon.com" , "julien@xen.org" , "xadimgnik@gmail.com" , "paul@xen.org" Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Hi Stefano, Stefano Stabellini writes: > Hi Paul, Julien, Volodymyr, > > This is another bug fix that I would like to get in 4.14. It doesn't > look like we need any changes to this patch, assuming that it is > accurate to the spec. > > It would be nice if Volodymyr could provide more info on the spec side, > but honestly I trust his experience on this. I'm sorry for the delay. Julien asks very good and deep questions and it sometimes requires deep research, to fully and correctly answer to them. This was exactly that case. I'll answer timely to the next e-mails. --=20 Volodymyr Babchuk at EPAM=