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Thu, 24 Sep 2020 10:50:46 +0000 Subject: Re: [PATCH 00/13] iommu: amd: Add Generic IO Page Table Framework Support To: Joerg Roedel Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org References: <20200923101442.73157-1-suravee.suthikulpanit@amd.com> <20200924103448.GO27174@8bytes.org> From: Suravee Suthikulpanit Message-ID: Date: Thu, 24 Sep 2020 17:50:37 +0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 In-Reply-To: <20200924103448.GO27174@8bytes.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [183.89.247.160] X-ClientProxiedBy: SG2PR03CA0112.apcprd03.prod.outlook.com (2603:1096:4:91::16) To DM5PR12MB1163.namprd12.prod.outlook.com (2603:10b6:3:7a::18) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from Suravees-MacBook-Pro.local (183.89.247.160) by SG2PR03CA0112.apcprd03.prod.outlook.com (2603:1096:4:91::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3412.9 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: IgL9nesptcl5jCURFcD4n3cLVzzjUgSEEwpYjvVoHOG3DEm5i+WZNNs8nPelJeeGc9FjOhUX+DwHq4LZ9R56Ykc+e6ob8c5Lyhuq2NGTMcNPF6OAMGg9XTFVirU0gGDscanFtOIJPUFjx24lVtep6+YJtUsuxcnBUDTWylEt9QJ0vuIhXp46tn6BoozNgm3S5TQXzBJVVuk00myuoOayyNhFQoe00SvQMCywtjf0L1DSn18cGA8u8MACXgZqR6UkKWVCWLeOF9oMut/kFOOVlh5+VVx2vuRb4CuvtWKUkCsRybM7KfDJg80RHiqsQ++XLKrm9f9s0x4xu+4lbQlAYNDKni1CiT0D5JR8y3r6hHLIBzODxJVBsiTZACeJqh8PvsCR4Tnh897ZhL3NRqCrYyUnBQYEA9A3jIuowZee3g4n3CvnJ0eBdZ6+B5TuP/qysHhyFPiURWNPWDOlGu3ETcDqxlTbMYa1SjWjQLJlMSf2UzxPkNU7mVdislGC5KOdNi975e0NzXs2/ftNj0bBHhbSVj72z1xIyMh6GgOjNmD8yT1a6Ml9plfqKdhRKCdOkW7gC9d2oLrhGCgOExIjlxavhtp8JzT/EqJYfSsxztOqHRy0Oiq0Bv6Rj0mAg+/4JZYuPV/iqFAAV8Y553O9Lg== X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: aed2f12f-9ed7-4860-ebbf-08d86077b121 X-MS-Exchange-CrossTenant-AuthSource: DM5PR12MB1163.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Sep 2020 10:50:46.4289 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: lcKHRUYIn7yezpG+zsoU1/7A6aHxh+JmXvTFPIkVvxp9HQ6ZHLDRq5F24libAB4B2EFLZh6gBV1W8RgqYRxgwA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB3081 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/24/20 5:34 PM, Joerg Roedel wrote: > Hi Suravee, > > On Wed, Sep 23, 2020 at 10:14:29AM +0000, Suravee Suthikulpanit wrote: >> The framework allows callable implementation of IO page table. >> This allows AMD IOMMU driver to switch between different types >> of AMD IOMMU page tables (e.g. v1 vs. v2). > > Is there a reason you created your own framework, there is already an > io-pgtable framework for ARM, maybe that can be reused? > Actually, this is the same framework used by ARM codes. Sorry if the description is not clear. Suravee