From: Jason Gunthorpe <jgg@nvidia.com>
To: Nicolin Chen <nicolinc@nvidia.com>
Cc: kevin.tian@intel.com, will@kernel.org, joro@8bytes.org,
suravee.suthikulpanit@amd.com, robin.murphy@arm.com,
dwmw2@infradead.org, baolu.lu@linux.intel.com, shuah@kernel.org,
linux-kernel@vger.kernel.org, iommu@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kselftest@vger.kernel.org
Subject: Re: [PATCH v1 15/16] iommu/arm-smmu-v3: Add viommu cache invalidation support
Date: Mon, 19 Aug 2024 15:28:11 -0300 [thread overview]
Message-ID: <20240819182811.GR2032816@nvidia.com> (raw)
In-Reply-To: <ZsOMu3OnMn49cDXf@Asurada-Nvidia>
On Mon, Aug 19, 2024 at 11:19:39AM -0700, Nicolin Chen wrote:
> > But nesting enablment with out viommu is alot less useful than I had
> > thought :(
>
> Actually, without viommu, the hwpt cache invalidate alone could
> still support non-SVA case?
That is what I thought, but doesn't the guest still have to invalidate
the CD table entry # 0?
> Though we still have the blocker at the msi mapping... It still
> requires a solution, even for viommu series.
Yes, small steps. The point of this step was to get the nested paging
only (without msi, pri, etc, etc)
Jason
next prev parent reply other threads:[~2024-08-19 18:29 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-07 20:10 [PATCH v1 00/16] iommufd: Add VIOMMU infrastructure (Part-1) Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 01/16] iommufd/viommu: Add IOMMUFD_OBJ_VIOMMU and IOMMU_VIOMMU_ALLOC ioctl Nicolin Chen
2024-08-14 16:50 ` Nicolin Chen
2024-08-15 18:11 ` Jason Gunthorpe
2024-08-15 18:20 ` Nicolin Chen
2024-08-15 23:37 ` Jason Gunthorpe
2024-08-15 18:31 ` Jason Gunthorpe
2024-08-07 20:10 ` [PATCH v1 02/16] iommu: Pass in a viommu pointer to domain_alloc_user op Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 03/16] iommufd: Allow pt_id to carry viommu_id for IOMMU_HWPT_ALLOC Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 04/16] iommufd/selftest: Add IOMMU_VIOMMU_ALLOC test coverage Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 05/16] iommufd/viommu: Add IOMMU_VIOMMU_SET/UNSET_VDEV_ID ioctl Nicolin Chen
2024-08-14 17:09 ` Nicolin Chen
2024-08-14 22:02 ` Jason Gunthorpe
2024-08-15 19:08 ` Jason Gunthorpe
2024-08-15 19:46 ` Nicolin Chen
2024-08-15 19:53 ` Nicolin Chen
2024-08-15 23:42 ` Jason Gunthorpe
2024-08-15 23:41 ` Jason Gunthorpe
2024-08-16 0:21 ` Nicolin Chen
2024-08-19 17:33 ` Jason Gunthorpe
2024-08-19 18:10 ` Nicolin Chen
2024-08-19 18:26 ` Jason Gunthorpe
2024-08-07 20:10 ` [PATCH v1 06/16] iommufd/selftest: Add IOMMU_VIOMMU_SET/UNSET_VDEV_ID test coverage Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 07/16] iommufd/viommu: Add cache_invalidate for IOMMU_VIOMMU_TYPE_DEFAULT Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 08/16] iommufd/viommu: Add IOMMU_VIOMMU_INVALIDATE ioctl Nicolin Chen
2024-08-15 23:24 ` Jason Gunthorpe
2024-08-15 23:51 ` Nicolin Chen
2024-08-19 17:30 ` Jason Gunthorpe
2024-08-19 17:49 ` Nicolin Chen
2024-08-19 18:20 ` Jason Gunthorpe
2024-08-19 18:22 ` Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 09/16] iommufd/viommu: Make iommufd_viommu_find_device a public API Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 10/16] iommufd/selftest: Add mock_viommu_invalidate_user op Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 11/16] iommufd/selftest: Add IOMMU_TEST_OP_DEV_CHECK_CACHE test command Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 12/16] iommufd/selftest: Add coverage for IOMMU_VIOMMU_INVALIDATE ioctl Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 13/16] iommufd/viommu: Add iommufd_viommu_to_parent_domain helper Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 14/16] iommu/arm-smmu-v3: Extract an __arm_smmu_cache_invalidate_user helper Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 15/16] iommu/arm-smmu-v3: Add viommu cache invalidation support Nicolin Chen
2024-08-15 23:36 ` Jason Gunthorpe
2024-08-16 0:50 ` Nicolin Chen
2024-08-19 17:36 ` Jason Gunthorpe
2024-08-19 18:19 ` Nicolin Chen
2024-08-19 18:28 ` Jason Gunthorpe [this message]
2024-08-19 18:38 ` Nicolin Chen
2024-08-19 18:47 ` Jason Gunthorpe
2024-08-19 18:54 ` Nicolin Chen
2024-08-07 20:10 ` [PATCH v1 16/16] iommu/arm-smmu-v3: Allow ATS for IOMMU_DOMAIN_NESTED Nicolin Chen
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