From: Nicolin Chen <nicolinc@nvidia.com>
To: Pranjal Shrivastava <praan@google.com>
Cc: <jgg@nvidia.com>, <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>, <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>,
<dwmw2@infradead.org>, <baolu.lu@linux.intel.com>
Subject: Re: [PATCH v7 27/28] iommu/tegra241-cmdqv: Add user-space use support
Date: Tue, 1 Jul 2025 15:07:57 -0700 [thread overview]
Message-ID: <aGRcPSwaJkTeUrMx@Asurada-Nvidia> (raw)
In-Reply-To: <aGRIctg4T6cQECx4@google.com>
On Tue, Jul 01, 2025 at 08:43:30PM +0000, Pranjal Shrivastava wrote:
> On Tue, Jul 01, 2025 at 01:23:17PM -0700, Nicolin Chen wrote:
> > Or perhaps calling them "non-accelerated commands" would be nicer.
>
> Uhh okay, so there'll be a separate driver in the VM issuing invalidation
> commands directly to the CMDQV thus we don't see any of it's part here?
That's how it works. VM must run a guest-level VCMDQ driver that
separates accelerated and non-accelerated commands as it already
does:
accelerated commands => VCMDQ (HW)
non-accelerated commands => SMMU CMDQ (SW) =iommufd=> SMMU CMDQ (HW)
Nicolin
next prev parent reply other threads:[~2025-07-01 22:38 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-26 19:34 [PATCH v7 00/28] iommufd: Add vIOMMU infrastructure (Part-4 HW QUEUE) Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 01/28] iommufd: Report unmapped bytes in the error path of iopt_unmap_iova_range Nicolin Chen
2025-07-02 9:39 ` Tian, Kevin
2025-07-04 12:59 ` Jason Gunthorpe
2025-06-26 19:34 ` [PATCH v7 02/28] iommufd/viommu: Explicitly define vdev->virt_id Nicolin Chen
2025-07-01 12:30 ` Pranjal Shrivastava
2025-07-02 9:40 ` Tian, Kevin
2025-07-02 19:59 ` Nicolin Chen
2025-07-04 12:59 ` Jason Gunthorpe
2025-06-26 19:34 ` [PATCH v7 03/28] iommu: Use enum iommu_hw_info_type for type in hw_info op Nicolin Chen
2025-07-01 12:48 ` Pranjal Shrivastava
2025-07-01 12:51 ` Pranjal Shrivastava
2025-07-02 9:41 ` Tian, Kevin
2025-07-04 13:00 ` Jason Gunthorpe
2025-06-26 19:34 ` [PATCH v7 04/28] iommu: Add iommu_copy_struct_to_user helper Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 05/28] iommu: Pass in a driver-level user data structure to viommu_init op Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 06/28] iommufd/viommu: Allow driver-specific user data for a vIOMMU object Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 07/28] iommufd/selftest: Support user_data in mock_viommu_alloc Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 08/28] iommufd/selftest: Add coverage for viommu data Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 09/28] iommufd/access: Add internal APIs for HW queue to use Nicolin Chen
2025-07-02 9:42 ` Tian, Kevin
2025-07-04 13:08 ` Jason Gunthorpe
2025-06-26 19:34 ` [PATCH v7 10/28] iommufd/access: Bypass access->ops->unmap for internal use Nicolin Chen
2025-07-02 9:45 ` Tian, Kevin
2025-07-02 20:12 ` Nicolin Chen
2025-07-03 4:57 ` Tian, Kevin
2025-07-04 4:08 ` Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 11/28] iommufd/viommu: Add driver-defined vDEVICE support Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 12/28] iommufd/viommu: Introduce IOMMUFD_OBJ_HW_QUEUE and its related struct Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 13/28] iommufd/viommu: Add IOMMUFD_CMD_HW_QUEUE_ALLOC ioctl Nicolin Chen
2025-07-04 13:26 ` Jason Gunthorpe
2025-07-04 13:33 ` Jason Gunthorpe
2025-06-26 19:34 ` [PATCH v7 14/28] iommufd/driver: Add iommufd_hw_queue_depend/undepend() helpers Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 15/28] iommufd/selftest: Add coverage for IOMMUFD_CMD_HW_QUEUE_ALLOC Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 16/28] iommufd: Add mmap interface Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 17/28] iommufd/selftest: Add coverage for the new " Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 18/28] Documentation: userspace-api: iommufd: Update HW QUEUE Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 19/28] iommu: Allow an input type in hw_info op Nicolin Chen
2025-07-01 12:54 ` Pranjal Shrivastava
2025-06-26 19:34 ` [PATCH v7 20/28] iommufd: Allow an input data_type via iommu_hw_info Nicolin Chen
2025-07-01 12:58 ` Pranjal Shrivastava
2025-06-26 19:34 ` [PATCH v7 21/28] iommufd/selftest: Update hw_info coverage for an input data_type Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 22/28] iommu/arm-smmu-v3-iommufd: Add vsmmu_size/type and vsmmu_init impl ops Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 23/28] iommu/arm-smmu-v3-iommufd: Add hw_info to impl_ops Nicolin Chen
2025-07-01 12:24 ` Pranjal Shrivastava
2025-06-26 19:34 ` [PATCH v7 24/28] iommu/tegra241-cmdqv: Use request_threaded_irq Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 25/28] iommu/tegra241-cmdqv: Simplify deinit flow in tegra241_cmdqv_remove_vintf() Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 26/28] iommu/tegra241-cmdqv: Do not statically map LVCMDQs Nicolin Chen
2025-06-26 19:34 ` [PATCH v7 27/28] iommu/tegra241-cmdqv: Add user-space use support Nicolin Chen
2025-07-01 16:02 ` Pranjal Shrivastava
2025-07-01 19:42 ` Nicolin Chen
2025-07-01 20:03 ` Pranjal Shrivastava
2025-07-01 20:23 ` Nicolin Chen
2025-07-01 20:43 ` Pranjal Shrivastava
2025-07-01 22:07 ` Nicolin Chen [this message]
2025-07-01 22:51 ` Pranjal Shrivastava
2025-07-01 23:01 ` Nicolin Chen
2025-07-02 0:14 ` Pranjal Shrivastava
2025-07-02 0:46 ` Nicolin Chen
2025-07-02 1:38 ` Pranjal Shrivastava
2025-07-02 18:05 ` Jason Gunthorpe
2025-07-03 14:46 ` Pranjal Shrivastava
2025-07-03 17:55 ` Jason Gunthorpe
2025-07-03 18:48 ` Pranjal Shrivastava
2025-07-04 12:50 ` Jason Gunthorpe
2025-07-10 9:04 ` Pranjal Shrivastava
2025-06-26 19:34 ` [PATCH v7 28/28] iommu/tegra241-cmdqv: Add IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV support Nicolin Chen
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