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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BN9PR11MB5276.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 99f49cbc-c090-45c2-24e0-08dc3cb69810 X-MS-Exchange-CrossTenant-originalarrivaltime: 05 Mar 2024 01:50:11.2239 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: bPfhSuC2Tm6UfIk84cbQiSotSb5vkKcUjFfnlsgRD1h3HRCGqG3ZLmqOT39XKnZAoXT2M8N6MO0X+BrpDDVs/Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR11MB8059 X-OriginatorOrg: intel.com > From: Lu Baolu > Sent: Tuesday, March 5, 2024 9:33 AM >=20 > In contrast to legacy mode, the DMA translation table is configured in > the PASID table entry instead of the context entry for scalable mode. > For this reason, it is more appropriate to set up the scalable mode > context entry in the device_probe callback and direct it to the > appropriate PASID table. >=20 > The iommu domain attach/detach operations only affect the PASID table > entry. Therefore, there is no need to modify the context entry when > configuring the translation type and page table. >=20 > The only exception is the kdump case, where context entry setup is > postponed until the device driver invokes the first DMA interface. >=20 > Signed-off-by: Lu Baolu Reviewed-by: Kevin Tian