From: Jason Gunthorpe <jgg@nvidia.com>
To: "Tian, Kevin" <kevin.tian@intel.com>
Cc: Nicolin Chen <nicolinc@nvidia.com>,
"will@kernel.org" <will@kernel.org>,
"joro@8bytes.org" <joro@8bytes.org>,
"suravee.suthikulpanit@amd.com" <suravee.suthikulpanit@amd.com>,
"robin.murphy@arm.com" <robin.murphy@arm.com>,
"dwmw2@infradead.org" <dwmw2@infradead.org>,
"baolu.lu@linux.intel.com" <baolu.lu@linux.intel.com>,
"shuah@kernel.org" <shuah@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"iommu@lists.linux.dev" <iommu@lists.linux.dev>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kselftest@vger.kernel.org"
<linux-kselftest@vger.kernel.org>,
"eric.auger@redhat.com" <eric.auger@redhat.com>,
"jean-philippe@linaro.org" <jean-philippe@linaro.org>,
"mdf@kernel.org" <mdf@kernel.org>,
"mshavit@google.com" <mshavit@google.com>,
"shameerali.kolothum.thodi@huawei.com"
<shameerali.kolothum.thodi@huawei.com>,
"smostafa@google.com" <smostafa@google.com>,
"Liu, Yi L" <yi.l.liu@intel.com>
Subject: Re: [PATCH v2 17/19] iommu/arm-smmu-v3: Add arm_smmu_viommu_cache_invalidate
Date: Wed, 11 Sep 2024 20:07:35 -0300 [thread overview]
Message-ID: <20240911230735.GQ58321@nvidia.com> (raw)
In-Reply-To: <BN9PR11MB5276EBE0F714CF3EF0DAEDEC8C9B2@BN9PR11MB5276.namprd11.prod.outlook.com>
On Wed, Sep 11, 2024 at 08:13:01AM +0000, Tian, Kevin wrote:
> Probably there is a good reason e.g. for simplification or better
> aligned with hw accel stuff. But it's not explained clearly so far.
Probably the most concrete thing is if you have a direct assignment
invalidation queue (ie DMA'd directly by HW) then it only applies to a
single pIOMMU and invalidation commands placed there are unavoidably
limited in scope.
This creates a representation problem, if we have a vIOMMU that spans
many pIOMMUs but invalidations do some subset how to do we model
that. Just saying the vIOMMU is linked to the pIOMMU solves this
nicely.
Jason
next prev parent reply other threads:[~2024-09-11 23:09 UTC|newest]
Thread overview: 149+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-27 16:59 [PATCH v2 00/19] iommufd: Add VIOMMU infrastructure (Part-1) Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 01/19] iommufd: Reorder struct forward declarations Nicolin Chen
2024-09-05 15:44 ` Jason Gunthorpe
2024-08-27 16:59 ` [PATCH v2 02/19] iommufd/viommu: Add IOMMUFD_OBJ_VIOMMU and IOMMU_VIOMMU_ALLOC ioctl Nicolin Chen
2024-09-01 2:39 ` Baolu Lu
2024-09-02 5:27 ` Nicolin Chen
2024-09-04 16:26 ` Jason Gunthorpe
2024-09-04 17:29 ` Nicolin Chen
2024-09-04 23:37 ` Jason Gunthorpe
2024-09-05 3:07 ` Nicolin Chen
2024-09-12 3:39 ` Nicolin Chen
2024-09-15 21:10 ` Jason Gunthorpe
2024-09-05 15:53 ` Jason Gunthorpe
2024-09-05 17:10 ` Nicolin Chen
2024-09-05 17:41 ` Jason Gunthorpe
2024-09-05 18:04 ` Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 03/19] iommu: Pass in a viommu pointer to domain_alloc_user op Nicolin Chen
2024-09-05 15:54 ` Jason Gunthorpe
2024-09-05 17:19 ` Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 04/19] iommufd: Allow pt_id to carry viommu_id for IOMMU_HWPT_ALLOC Nicolin Chen
2024-09-05 15:56 ` Jason Gunthorpe
2024-09-26 8:50 ` Yi Liu
2024-09-26 20:10 ` Nicolin Chen
2024-09-27 0:43 ` Tian, Kevin
2024-09-27 1:25 ` Nicolin Chen
2024-09-27 2:23 ` Tian, Kevin
2024-09-27 2:57 ` Nicolin Chen
2024-09-27 5:38 ` Yi Liu
2024-09-27 6:02 ` Nicolin Chen
2024-09-27 11:59 ` Jason Gunthorpe
2024-09-27 19:52 ` Nicolin Chen
2024-09-27 12:12 ` Yi Liu
2024-09-27 20:29 ` Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 05/19] iommufd/selftest: Add IOMMU_VIOMMU_ALLOC test coverage Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 06/19] iommufd/viommu: Add IOMMU_VIOMMU_SET/UNSET_VDEV_ID ioctl Nicolin Chen
2024-09-05 16:03 ` Jason Gunthorpe
2024-09-05 17:37 ` Nicolin Chen
2024-09-05 17:43 ` Jason Gunthorpe
2024-09-05 20:14 ` Nicolin Chen
2024-09-11 6:19 ` Tian, Kevin
2024-09-11 7:11 ` Nicolin Chen
2024-09-11 7:18 ` Tian, Kevin
2024-09-11 7:47 ` Nicolin Chen
2024-10-01 8:54 ` Nicolin Chen
2024-10-01 13:46 ` Jason Gunthorpe
2024-10-01 18:45 ` Nicolin Chen
2024-09-27 13:50 ` Mostafa Saleh
2024-09-27 14:01 ` Jason Gunthorpe
2024-09-27 14:22 ` Mostafa Saleh
2024-09-27 14:58 ` Jason Gunthorpe
2024-09-27 15:59 ` Mostafa Saleh
2024-10-04 4:32 ` Alexey Kardashevskiy
2024-10-04 5:33 ` Nicolin Chen
2024-10-04 11:41 ` Jason Gunthorpe
2024-10-04 18:13 ` Nicolin Chen
2024-10-04 18:50 ` Jason Gunthorpe
2024-10-04 19:25 ` Nicolin Chen
2024-10-04 20:17 ` Jason Gunthorpe
2024-10-04 20:33 ` Nicolin Chen
2024-10-07 17:18 ` Jason Gunthorpe
2025-04-30 7:54 ` Alexey Kardashevskiy
2025-04-30 7:58 ` Nicolin Chen
2025-05-05 17:08 ` Jason Gunthorpe
2025-05-06 2:53 ` Nicolin Chen
2025-05-06 4:35 ` Alexey Kardashevskiy
2025-05-06 4:46 ` Tian, Kevin
2025-05-06 12:58 ` Jason Gunthorpe
2025-05-06 19:55 ` Nicolin Chen
2025-05-07 12:28 ` Jason Gunthorpe
2025-05-07 11:18 ` Alexey Kardashevskiy
2025-05-07 12:24 ` Jason Gunthorpe
2025-05-09 2:57 ` Alexey Kardashevskiy
2025-05-09 22:07 ` Jason Gunthorpe
2025-05-10 12:51 ` Alexey Kardashevskiy
2025-05-12 15:31 ` Jason Gunthorpe
2024-08-27 16:59 ` [PATCH v2 07/19] iommufd/selftest: Add IOMMU_VIOMMU_SET/UNSET_VDEV_ID test coverage Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 08/19] iommufd/viommu: Add cache_invalidate for IOMMU_VIOMMU_TYPE_DEFAULT Nicolin Chen
2024-09-05 16:05 ` Jason Gunthorpe
2024-08-27 16:59 ` [PATCH v2 09/19] iommufd: Allow hwpt_id to carry viommu_id for IOMMU_HWPT_INVALIDATE Nicolin Chen
2024-09-05 16:10 ` Jason Gunthorpe
2024-08-27 16:59 ` [PATCH v2 10/19] iommufd/viommu: Add vdev_id helpers for IOMMU drivers Nicolin Chen
2024-09-05 16:14 ` Jason Gunthorpe
2024-09-05 17:53 ` Nicolin Chen
2024-09-11 23:11 ` Jason Gunthorpe
2024-09-12 3:17 ` Nicolin Chen
2024-10-05 5:19 ` Nicolin Chen
2024-10-07 15:38 ` Jason Gunthorpe
2024-10-07 16:36 ` Nicolin Chen
2024-10-07 17:11 ` Jason Gunthorpe
2024-10-07 17:25 ` Nicolin Chen
2024-10-07 18:28 ` Jason Gunthorpe
2024-10-07 19:56 ` Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 11/19] iommu: Add iommu_copy_struct_from_full_user_array helper Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 12/19] iommufd/selftest: Add mock_viommu_invalidate_user op Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 13/19] iommufd/selftest: Add IOMMU_TEST_OP_DEV_CHECK_CACHE test command Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 14/19] iommufd/selftest: Add VIOMMU coverage for IOMMU_HWPT_INVALIDATE ioctl Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 15/19] iommufd/viommu: Add iommufd_viommu_to_parent_domain helper Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 16/19] iommu/arm-smmu-v3: Add arm_smmu_cache_invalidate_user Nicolin Chen
2024-09-05 16:23 ` Jason Gunthorpe
2024-09-05 17:56 ` Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 17/19] iommu/arm-smmu-v3: Add arm_smmu_viommu_cache_invalidate Nicolin Chen
2024-09-05 16:20 ` Jason Gunthorpe
2024-09-05 18:00 ` Nicolin Chen
2024-09-05 18:21 ` Jason Gunthorpe
2024-09-11 6:25 ` Tian, Kevin
2024-09-11 7:20 ` Nicolin Chen
2024-09-11 7:50 ` Baolu Lu
2024-09-11 8:17 ` Tian, Kevin
2024-09-11 8:19 ` Baolu Lu
2024-09-11 21:08 ` Nicolin Chen
2024-09-12 4:45 ` Baolu Lu
2024-09-11 8:13 ` Tian, Kevin
2024-09-11 20:53 ` Nicolin Chen
2024-09-11 23:07 ` Jason Gunthorpe [this message]
2024-09-13 2:33 ` Tian, Kevin
2024-09-14 14:50 ` Jason Gunthorpe
2024-09-18 8:10 ` Tian, Kevin
2024-09-23 18:34 ` Jason Gunthorpe
2024-09-11 23:00 ` Jason Gunthorpe
2024-08-27 16:59 ` [PATCH v2 18/19] iommu/arm-smmu-v3: Allow ATS for IOMMU_DOMAIN_NESTED Nicolin Chen
2024-08-27 16:59 ` [PATCH v2 19/19] iommu/arm-smmu-v3: Update comments about ATS and bypass Nicolin Chen
2024-09-11 6:12 ` [PATCH v2 00/19] iommufd: Add VIOMMU infrastructure (Part-1) Tian, Kevin
2024-09-11 7:08 ` Nicolin Chen
2024-09-11 7:18 ` Tian, Kevin
2024-09-11 7:40 ` Nicolin Chen
2024-09-11 8:08 ` Tian, Kevin
2024-09-11 20:21 ` Nicolin Chen
2024-10-01 1:55 ` Alexey Kardashevskiy
2024-10-01 3:36 ` Nicolin Chen
2024-10-01 5:06 ` Alexey Kardashevskiy
2024-10-01 13:44 ` Jason Gunthorpe
2024-09-25 10:30 ` Yi Liu
2024-09-25 18:55 ` Nicolin Chen
2024-09-26 8:47 ` Yi Liu
2024-09-26 20:03 ` Nicolin Chen
2024-09-27 2:05 ` Baolu Lu
2024-09-27 6:14 ` Yi Liu
2024-09-27 5:54 ` Yi Liu
2024-09-27 6:32 ` Nicolin Chen
2024-09-27 12:12 ` Yi Liu
2024-09-27 12:20 ` Jason Gunthorpe
2024-09-29 7:19 ` Yi Liu
2024-10-01 13:48 ` Jason Gunthorpe
2024-10-01 18:40 ` Nicolin Chen
2024-09-27 20:44 ` Nicolin Chen
2024-09-29 7:16 ` Yi Liu
2024-09-30 21:59 ` Nicolin Chen
2024-10-09 7:20 ` Yi Liu
2024-10-09 12:31 ` Jason Gunthorpe
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