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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?xTspdmBcQhKxjBiqI/+iWk6vbRRONe4X2nhF6Rwa8BbiUAUWvheaE/LuQxsZ?= =?us-ascii?Q?aTmmKJqVJ7MPHy5nlAT5P8R7YXBDiHEoz3OoSbL+PAumcwgRbRUWo9D9ogiK?= =?us-ascii?Q?rpFC5FuRhmoL5ycQik3zSJ3f/Ky2yJnB62D+XryRuGGiftHm/Un7EFNbyeIg?= =?us-ascii?Q?QPfFkX5K50+NEeJ65GxxllNNr7RZ3fQ7IX0KhCP4XPebrmuB+91pnxba75zy?= =?us-ascii?Q?AesmH7vImdP6iJrOqHzO8RxM4IMzLwZlOoRvINHNGVWeFZR4YGmIdUd3CUN6?= =?us-ascii?Q?hwF3Jt5dUQj8aB9Wm8QcHZjgqj/qW+m4KcnJqf3FAeZFgdTccoU5xwPmaZTv?= =?us-ascii?Q?Ogf3+3znlNWX8EDxhhWgTj3lw4LRWGDca2W+xkCtC9mj8fqzeG6gizMAyZq4?= =?us-ascii?Q?Vxl1NUpBLGPL9NeZoHqBdqoprCLXzXU1gS21XSda5Kxzr4sC9DnGR2udKWeH?= =?us-ascii?Q?gmY/eimGcaoDdG4jKHjexDVjTmIB+Bql9X6o6mM5TsYuRj9SlsUXHVqdh6O/?= =?us-ascii?Q?RCzI7DQkKSw4GdKvC9O0VsJQbWcKWBNquAwrjV12IAM/Rj8iqNUm43v8mQ3d?= =?us-ascii?Q?0a4b5oaJVTn3TwubK4kauswpfDLgfukm+Ms120kuyodWOYs9Xup14Zceh/fY?= =?us-ascii?Q?teusj8HuwvIyuOcP/qhu9CBF5r8DGeY81HszVGtz0BeQVcbz/09aBuXa6XVF?= =?us-ascii?Q?diK42r4Y8LQkXw7UxN6TzWOAvEavshlIkhimBHhIyAxwkYnmVb2kGqsN2pbl?= =?us-ascii?Q?H47ape8k59QKUEFw/6ZefRR16qGevbAn9eFjJF9rK43NgWiJtZADPuAxYh+R?= =?us-ascii?Q?GmY/ZC/NPlKTwfSh5FBT1bn26Fl9kgYeJ9i3pzTinOzTZ2T9zzxQEVOccW9l?= =?us-ascii?Q?LIygpd6/R5n848MhjoiDAzJxR2Yrb+FgHgdxX+LIdnRvr4Gzt3szY3TzOn47?= =?us-ascii?Q?nGbAwazNj6kV0tEWdnOcvuF3vIi6hnEWpz2qxaM7HgtedMgUz8PSpCVG3v4k?= =?us-ascii?Q?44zLU6L0B40C6KgdRXxunBMFTKBJ0LK7MD7uXbam6l2M1e9XmlHN3e7s+vH3?= =?us-ascii?Q?5nrijpQkHe8Ajc5ubaOOlGYQikG1Xa+7Qha6apseTSzilLnW8xL+3DEbHOSj?= =?us-ascii?Q?iWGFh+ifZv9yFhwDwqzrYb5sI7fK5jpSGr2rw384d1+ioi3G0mi7DkrK2jyo?= =?us-ascii?Q?kKFcnXeIQ5hkmO50TofkZypCCx0eh9/itzuizzyHqYklmKNZ9yMJ8XH3CVSv?= =?us-ascii?Q?58sI4Rii7S/jPckz49u1uYrYBeW2HPwyLcXmunPUfjhybVu7C4D9QJ/7fTDE?= =?us-ascii?Q?tg1KSHqk5A8r1OhmRYwnKGCbJo39tvDdTcXucF3StTNKhQF8cDATmmQG9EU4?= =?us-ascii?Q?GXNVmSKSXmqr9HHj7AWW7nkRLOM53kOu3UCIE0NMdyu5P3Wk5rVTrhKmEgd6?= =?us-ascii?Q?oySYacS5ceJLsVwrD+0jWoGNjHfJP2CVUF61KMqBMwFhiv7i/jdEeqAN3si3?= =?us-ascii?Q?VV62sC645y5XbnlghVhParz7rpl20Owu0YhRryQy1eOtseszdaki5wBtB0ZW?= =?us-ascii?Q?HLNXGqSXcyiOCy0b5Jw=3D?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: cd5f3ee3-7d99-4ff7-e802-08ddf61da14c X-MS-Exchange-CrossTenant-AuthSource: PH7PR12MB5757.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Sep 2025 19:08:47.9216 (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: v9hf+rQ6RIyoYUqmvqNReayOqJiCIV0Jf8npOLg9jgPXXusawNl61gBcUX/jBejf X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB6701 On Wed, Sep 17, 2025 at 09:46:25PM +0300, Leon Romanovsky wrote: > Let's take as an example MIPS/jazzdma, should we call to vdma_alloc() > in DMA_ATTR_MMIO case? Yes, that is right, this is an iommu, so it has to be programmed. > or directly return "phys" as it is done in other > architectures? Which? > > vdpa can support ATTR_MMIO with the same iommu prot MMIO adjustment, > > that would be a good additional patch. > > There is "bounce page" in VDPA, it sounds like swiotlb to me, which > doesn't work with MMIO. Oh OK, it eventually does call pfn_to_page().. This isn't the case I thought it was, there is another one that just routes to iommu_map Jason