From: Jason Gunthorpe <jgg@nvidia.com>
To: Nicolin Chen <nicolinc@nvidia.com>
Cc: kevin.tian@intel.com, corbet@lwn.net, will@kernel.org,
bagasdotme@gmail.com, robin.murphy@arm.com, joro@8bytes.org,
thierry.reding@gmail.com, vdumpa@nvidia.com,
jonathanh@nvidia.com, shuah@kernel.org, jsnitsel@redhat.com,
nathan@kernel.org, peterz@infradead.org, yi.l.liu@intel.com,
mshavit@google.com, praan@google.com, zhangzekun11@huawei.com,
iommu@lists.linux.dev, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-tegra@vger.kernel.org, linux-kselftest@vger.kernel.org,
patches@lists.linux.dev, mochs@nvidia.com,
alok.a.tiwari@oracle.com, vasant.hegde@amd.com
Subject: Re: [PATCH v4 18/23] iommu/arm-smmu-v3-iommufd: Support implementation-defined hw_info
Date: Fri, 16 May 2025 10:22:57 -0300 [thread overview]
Message-ID: <20250516132257.GE613512@nvidia.com> (raw)
In-Reply-To: <aCZL6+vsOri+WqXa@Asurada-Nvidia>
On Thu, May 15, 2025 at 01:17:47PM -0700, Nicolin Chen wrote:
> > I think the former is simpler to code, you can just add the req_type
> > to the signatures and if the driver comes back with a type != req_type
> > the core code will return EOPNOTSUPP
>
> OK.
>
> Maybe just turn the out_data_type to be bidirectional?
You can do that, bu you need to add a flag to turn it on. We didn't
validate that it was 0 on input before so we can't start now.
Jason
next prev parent reply other threads:[~2025-05-16 13:25 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-09 3:02 [PATCH v4 00/23] iommufd: Add vIOMMU infrastructure (Part-4 HW QUEUE) Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 01/23] iommufd/viommu: Add driver-allocated vDEVICE support Nicolin Chen
2025-05-15 5:42 ` Tian, Kevin
2025-05-15 16:55 ` Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 02/23] iommu: Pass in a driver-level user data structure to viommu_alloc op Nicolin Chen
2025-05-15 5:44 ` Tian, Kevin
2025-05-09 3:02 ` [PATCH v4 03/23] iommufd/viommu: Allow driver-specific user data for a vIOMMU object Nicolin Chen
2025-05-15 5:45 ` Tian, Kevin
2025-05-15 16:56 ` Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 04/23] iommu: Add iommu_copy_struct_to_user helper Nicolin Chen
2025-05-15 5:46 ` Tian, Kevin
2025-05-09 3:02 ` [PATCH v4 05/23] iommufd/driver: Let iommufd_viommu_alloc helper save ictx to viommu->ictx Nicolin Chen
2025-05-14 17:06 ` Jason Gunthorpe
2025-05-16 2:05 ` Nicolin Chen
2025-05-16 13:28 ` Jason Gunthorpe
2025-05-16 20:56 ` Nicolin Chen
2025-05-26 13:30 ` Jason Gunthorpe
2025-05-27 18:41 ` Nicolin Chen
2025-05-30 18:27 ` Jason Gunthorpe
2025-05-30 18:34 ` Nicolin Chen
2025-05-15 5:48 ` Tian, Kevin
2025-05-09 3:02 ` [PATCH v4 06/23] iommufd/driver: Add iommufd_struct_destroy to revert iommufd_viommu_alloc Nicolin Chen
2025-05-14 18:26 ` Jason Gunthorpe
2025-05-14 19:21 ` Nicolin Chen
2025-05-15 12:49 ` Jason Gunthorpe
2025-05-15 16:55 ` Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 07/23] iommufd/selftest: Support user_data in mock_viommu_alloc Nicolin Chen
2025-05-15 5:49 ` Tian, Kevin
2025-05-09 3:02 ` [PATCH v4 08/23] iommufd/selftest: Add covearge for viommu data Nicolin Chen
2025-05-15 5:50 ` Tian, Kevin
2025-05-09 3:02 ` [PATCH v4 09/23] iommufd: Abstract iopt_pin_pages and iopt_unpin_pages helpers Nicolin Chen
2025-05-14 18:45 ` Jason Gunthorpe
2025-05-15 5:54 ` Tian, Kevin
2025-05-09 3:02 ` [PATCH v4 10/23] iommufd/viommu: Introduce IOMMUFD_OBJ_HW_QUEUE and its related struct Nicolin Chen
2025-05-15 5:58 ` Tian, Kevin
2025-05-15 17:14 ` Nicolin Chen
2025-05-16 2:30 ` Nicolin Chen
2025-05-16 2:59 ` Tian, Kevin
2025-05-19 17:05 ` Vasant Hegde
2025-05-15 15:39 ` Jason Gunthorpe
2025-05-15 17:17 ` Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 11/23] iommufd/viommu: Add IOMMUFD_CMD_HW_QUEUE_ALLOC ioctl Nicolin Chen
2025-05-15 6:30 ` Tian, Kevin
2025-05-15 18:44 ` Nicolin Chen
2025-05-16 2:49 ` Tian, Kevin
2025-05-16 3:16 ` Nicolin Chen
2025-05-16 3:52 ` Tian, Kevin
2025-05-16 4:05 ` Nicolin Chen
2025-05-18 15:19 ` Nicolin Chen
2025-05-15 16:06 ` Jason Gunthorpe
2025-05-15 18:16 ` Nicolin Chen
2025-05-15 18:59 ` Jason Gunthorpe
2025-05-15 20:32 ` Nicolin Chen
2025-05-16 13:26 ` Jason Gunthorpe
2025-05-16 2:42 ` Tian, Kevin
2025-05-16 13:25 ` Jason Gunthorpe
2025-05-19 17:29 ` Vasant Hegde
2025-05-19 18:14 ` Nicolin Chen
2025-05-20 8:38 ` Vasant Hegde
2025-05-23 1:51 ` Tian, Kevin
2025-05-26 13:29 ` Jason Gunthorpe
2025-05-09 3:02 ` [PATCH v4 12/23] iommufd/driver: Add iommufd_hw_queue_depend/undepend() helpers Nicolin Chen
2025-05-15 16:12 ` Jason Gunthorpe
2025-05-16 4:51 ` Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 13/23] iommufd/selftest: Add coverage for IOMMUFD_CMD_HW_QUEUE_ALLOC Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 14/23] iommufd: Add mmap interface Nicolin Chen
2025-05-09 14:13 ` kernel test robot
2025-05-09 19:30 ` Nicolin Chen
2025-05-15 6:41 ` Tian, Kevin
2025-05-15 16:47 ` Jason Gunthorpe
2025-05-16 4:08 ` Tian, Kevin
2025-05-16 13:29 ` Jason Gunthorpe
2025-05-16 17:42 ` Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 15/23] iommufd/selftest: Add coverage for the new " Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 16/23] Documentation: userspace-api: iommufd: Update HW QUEUE Nicolin Chen
2025-05-15 6:42 ` Tian, Kevin
2025-05-15 16:58 ` Jason Gunthorpe
2025-05-09 3:02 ` [PATCH v4 17/23] iommu/arm-smmu-v3-iommufd: Add vsmmu_alloc impl op Nicolin Chen
2025-05-15 7:52 ` Tian, Kevin
2025-05-15 17:19 ` Jason Gunthorpe
2025-05-15 17:32 ` Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 18/23] iommu/arm-smmu-v3-iommufd: Support implementation-defined hw_info Nicolin Chen
2025-05-15 7:54 ` Tian, Kevin
2025-05-15 17:17 ` Jason Gunthorpe
2025-05-15 18:52 ` Nicolin Chen
2025-05-15 18:56 ` Jason Gunthorpe
2025-05-15 19:21 ` Nicolin Chen
2025-05-15 19:23 ` Jason Gunthorpe
2025-05-15 20:17 ` Nicolin Chen
2025-05-16 13:22 ` Jason Gunthorpe [this message]
2025-05-16 17:34 ` Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 19/23] iommu/tegra241-cmdqv: Use request_threaded_irq Nicolin Chen
2025-05-15 7:57 ` Tian, Kevin
2025-05-15 17:21 ` Jason Gunthorpe
2025-05-09 3:02 ` [PATCH v4 20/23] iommu/tegra241-cmdqv: Simplify deinit flow in tegra241_cmdqv_remove_vintf() Nicolin Chen
2025-05-15 8:00 ` Tian, Kevin
2025-05-15 17:27 ` Jason Gunthorpe
2025-05-09 3:02 ` [PATCH v4 21/23] iommu/tegra241-cmdqv: Do not statically map LVCMDQs Nicolin Chen
2025-05-15 8:20 ` Tian, Kevin
2025-05-15 17:03 ` Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 22/23] iommu/tegra241-cmdqv: Add user-space use support Nicolin Chen
2025-05-15 8:27 ` Tian, Kevin
2025-05-15 17:13 ` Nicolin Chen
2025-05-16 4:00 ` Tian, Kevin
2025-05-16 4:10 ` Nicolin Chen
2025-05-09 3:02 ` [PATCH v4 23/23] iommu/tegra241-cmdqv: Add IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV support Nicolin Chen
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