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Fri, 23 Jul 2021 05:36:17 +0000 From: "Tian, Kevin" To: Christoph Hellwig Subject: RE: [PATCH 3/6] vfio: remove the unused mdev iommu hook Thread-Topic: [PATCH 3/6] vfio: remove the unused mdev iommu hook Thread-Index: AQHXRWldX98a1U6w60C1HwYkmNlXK6rc3tAAgAPcBcCAAJmdAIABJmdggAASuMCAAF5dgIAAAFGAgAAT44CABKOLAIAAAkEAgAAGdACAAAupAIAAIZMAgESRwUCAIwZ+AIABCmGQ Date: Fri, 23 Jul 2021 05:36:17 +0000 Message-ID: References: <20210514121925.GI1096940@ziepe.ca> <20210514133143.GK1096940@ziepe.ca> <20210517123010.GO1096940@ziepe.ca> <20210517133500.GP1096940@ziepe.ca> <20210722133450.GA29155@lst.de> In-Reply-To: <20210722133450.GA29155@lst.de> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-version: 11.5.1.3 dlp-product: dlpe-windows dlp-reaction: no-action authentication-results: lst.de; dkim=none (message not signed) header.d=none;lst.de; dmarc=none action=none header.from=intel.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: d30a1f1c-1919-4836-f98b-08d94d9bcb2a x-ms-traffictypediagnostic: BN6PR11MB1940: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:5236; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" > From: Christoph Hellwig > Sent: Thursday, July 22, 2021 9:35 PM > > On Wed, Jun 30, 2021 at 09:08:19AM +0000, Tian, Kevin wrote: > > The iommu layer should maintain above attaching status per device and > per > > iommu domain. There is no mdev/subdev concept in the iommu layer. It's > > just about RID or PASID. > > Yes, I think that makes sense. > > > And a new set of IOMMU-API: > > > > - iommu_{un}bind_pgtable(domain, dev, addr); > > - iommu_{un}bind_pgtable_pasid(domain, dev, addr, pasid); > > - iommu_cache_invalidate(domain, dev, invalid_info); > > What caches is this supposed to "invalidate"? pasid cache, iotlb or dev_iotlb entries that are related to the bound pgtable. the actual affected cache type and granularity (device-wide, pasid-wide, selected addr-range) are specified by the caller. Thanks Kevin _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu