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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?IVQRc3c4XUtZo/kuOzUZEDphFL+TuUDauJKwxMPNiaEixmB5s/kyUODikif4?= =?us-ascii?Q?upD8OqolGdWh5j4q+RyRH4POhK974e1teE+VzyABFjAVupbXULYgHMXK8eyV?= =?us-ascii?Q?Q1cN/U9SW7umHZxqD6rLLYsZxOht6L+0PE+t0+JchGtWtuG83KrBw5nzhaC/?= =?us-ascii?Q?z6Q15Ik3cSlsjgKMdQzEcEziDG0yYYDmVg8TW9WfYQb+uFL1WOiTBOvvcH2L?= =?us-ascii?Q?868kDsAnlGnc1svdVNScIekj+pbkPmkbsd+scWzkDUYG4IWYojar4brLLF67?= =?us-ascii?Q?nzgL1KfJpwSRSJyIK6ESsla0/OEgz5LxCRbAiGbhbNbTEllo1bkL7+Wq7cqO?= =?us-ascii?Q?/9+frCvTQr7Mm5BisMUndW+x7+Zyl1vVNcMnE/ADjBIuuv7ihlqJVqhiV3Sv?= =?us-ascii?Q?J75HXIaFJOTUExwsxQ9Lo6wHCjQZYWBNaAUJbcsurOjuWjuizrTPXOss9LU2?= =?us-ascii?Q?RTIaVABH2X5x2L/LU32PBev+ORcHeaPcIfecZ4R1ixqrOLPPswT9tkPmQcx7?= =?us-ascii?Q?FtS+q6wuKDas1Faeyqu7zPWp/Ubvf/BiF9s+v/TSTHuBsaOuunOQ/LLZf4WW?= =?us-ascii?Q?sJgPDw2pqTbM34nH/NUj7nW6+Z36KD0FhmA60Eq106TSulLzfESz6YXvnWBs?= =?us-ascii?Q?kWNcCXcY+SOpTCkLEaqMRtRKqpa2Dj2N3ZjscxwaXC1Ccgs6mII9Do/PEFyJ?= =?us-ascii?Q?Fy+XXdCEhcnH+jbkX9sxy8P+jK8pqcMBpjMkNu0Y3v4U19PCzVc3PmHbocze?= =?us-ascii?Q?V6BR60j/2Ws2uPpgXoSiQ4TB8Xf8v1Mln9A66Owcn6p5HmbsXubFcgRZVzPI?= =?us-ascii?Q?rHpfc40HO8b6v31OqPpWcKxvv14dIl4Kohx8Anjxl7L6Vl5+Tg7Vpt+z7c1U?= =?us-ascii?Q?+tFIso5GnjMl/z5Y6mKZOvd4O8dndoi4n+TiHCLfceKXCEfl0WuqbJY16fax?= =?us-ascii?Q?9W3e1KtVloFD2NJ9onU7f0/dlyoGmg2lZ76Ky9qdSnv4Ti/NyTSABhprrCkr?= =?us-ascii?Q?bcgAcUZuztZxF9/FWqyEFyI20dKzH0T7bJoui4kDWzGsRNy9oo0F0YGzXkrZ?= =?us-ascii?Q?sk1OhA1o9IE7C8sI7bCruUcRT2WibNY4NLFMx3eT4eVpSvITBNyeAu4TrGK2?= =?us-ascii?Q?2gNRgZ/0zzTwecEpoTRK4pjOXp757ALHs4+8mdM43X00AvO5N6EdjtJCiilO?= =?us-ascii?Q?444W5+pcNOqCCaGnRpI68eaOB3GG12RNqsfwsvWB5dTLe1u+UeT4WnCeQQUP?= =?us-ascii?Q?hf+aGatiRFy8+aXvdsw2Ffoi41jFIHzj1vGbycsSvKmURpV+9lo9w5VfW+44?= =?us-ascii?Q?qfiJKfBmjzCcFsl29O8OPSdbPq9xYxeeXc6u8JN7+QE4VM926r4QnOGiw9cw?= =?us-ascii?Q?3quzmOV0N8mX88HoIce4CYHoR0YVaV7yoPjVzE7ikgPSEmkWkbptbEUDNWVq?= =?us-ascii?Q?wKv3F2Btze768hyJkRWL3Vus7cesiLyhpqocn4hmIz8jnirCVizjagAQZrnF?= =?us-ascii?Q?ACG/VHv/5gqNL6MA5ESbiZvHh3EYstcjZE6ms2ia9olemAFGJNf/kjO2C60Y?= =?us-ascii?Q?Hm/itG3lERcNhLIkBKK2pnD+L+qeIP+IVa1FYaiG?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0add40bb-fdb8-4fce-e1af-08db311e9eae X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Mar 2023 12:59:38.5816 (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: 8wkhzifwZ1JENcKMeQC8ETDd6hnCYKSVV05JzK/gfAze+jqhv+2pwRR2+50DQ7UL X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB7786 Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org On Thu, Mar 30, 2023 at 12:52:39PM +0000, Liu, Yi L wrote: > > > "Use a negative value for no-iommu, where supported", or better, should > > > we define this explicitly as -1, or why not use a flag bit to specify > > > no-iommu? Maybe minsz is only through flags for the noiommu use case. > > > > I was happy enough for this to be defined as -1. We could give it a > > formal sounding constant too > > are you suggesting having something like "#define VFIO_NOIOMMU_FD -1"? Yeah something like that Jason 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 752FFC6FD1D for ; Thu, 30 Mar 2023 12:59:43 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D93C610E322; Thu, 30 Mar 2023 12:59:42 +0000 (UTC) Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2041.outbound.protection.outlook.com [40.107.220.41]) by gabe.freedesktop.org (Postfix) with ESMTPS id 968E310E348; Thu, 30 Mar 2023 12:59:40 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=hf4gHKofzDtXkaNlaESGxh9CtvVrKwNaSA1NK4J04zvaG3FJOcsCZ6X18b3SRmQcoPA9U3WJOAQulJY7bsqlU/EhFSeX9dRuEic1aSjKPiZK562tpUwEJ8ZwyaL63FWW0A/aUAEOS46gf7U1/xA/ul1hZvD4ye1IY6A0tDYuuslvEhsMjqHl0qwtXq5XrlWdgCntgYKC44oKfyQhXW7/15KS7zvWnwoNQAvZML278aRovWk+QlmZ4GLtHplkHjvTxWYJ3RbJQBEcEkWW+haCAhy/HuXvWZye5H9aiF6I8p4OA/FqLMYJxl+Q/B8tzC48cAr4HK3EMKe+ZyJ0jhxiaQ== ARC-Message-Signature: i=1; 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Maybe minsz is only through flags for the noiommu use case. > > > > I was happy enough for this to be defined as -1. We could give it a > > formal sounding constant too > > are you suggesting having something like "#define VFIO_NOIOMMU_FD -1"? Yeah something like that Jason