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,
dwmw2@infradead.org, baolu.lu@linux.intel.com
Subject: Re: [PATCH v8 14/29] iommufd/viommu: Add IOMMUFD_CMD_HW_QUEUE_ALLOC ioctl
Date: Wed, 9 Jul 2025 14:09:04 -0300 [thread overview]
Message-ID: <20250709170904.GG1599700@nvidia.com> (raw)
In-Reply-To: <49a93d92ce657cf6a0d588d2b31ad3600ace21f7.1751677708.git.nicolinc@nvidia.com>
On Fri, Jul 04, 2025 at 06:13:30PM -0700, Nicolin Chen wrote:
> +static struct iommufd_access *
> +iommufd_hw_queue_alloc_phys(struct iommu_hw_queue_alloc *cmd,
> + struct iommufd_viommu *viommu, phys_addr_t *base_pa)
> +{
> + struct iommufd_access *access;
> + struct page **pages;
> + size_t max_npages;
> + size_t length;
> + u64 offset;
> + size_t i;
> + int rc;
> +
> + offset =
> + cmd->nesting_parent_iova - PAGE_ALIGN(cmd->nesting_parent_iova);
PAGE_ALIGN is ALIGN UP, that is the wrong direction?
It is just:
offset = cmd->nesting_parent_iova % PAGE_SIZE;
And this is missing:
*base_pa = (page_to_pfn(pages[0]) << PAGE_SHIFT) + offset;
??
Jason
next prev parent reply other threads:[~2025-07-09 17:09 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-05 1:13 [PATCH v8 00/29] iommufd: Add vIOMMU infrastructure (Part-4 HW QUEUE) Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 01/29] iommufd: Report unmapped bytes in the error path of iopt_unmap_iova_range Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 02/29] iommufd: Correct virt_id kdoc at struct iommu_vdevice_alloc Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 03/29] iommufd/viommu: Explicitly define vdev->virt_id Nicolin Chen
2025-07-05 15:03 ` Vasant Hegde
2025-07-05 1:13 ` [PATCH v8 04/29] iommu: Use enum iommu_hw_info_type for type in hw_info op Nicolin Chen
2025-07-09 16:47 ` Jason Gunthorpe
2025-07-10 2:57 ` Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 05/29] iommu: Add iommu_copy_struct_to_user helper Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 06/29] iommu: Pass in a driver-level user data structure to viommu_init op Nicolin Chen
2025-07-07 8:05 ` Vasant Hegde
2025-07-05 1:13 ` [PATCH v8 07/29] iommufd/viommu: Allow driver-specific user data for a vIOMMU object Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 08/29] iommufd/selftest: Support user_data in mock_viommu_alloc Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 09/29] iommufd/selftest: Add coverage for viommu data Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 10/29] iommufd/access: Add internal APIs for HW queue to use Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 11/29] iommufd/access: Bypass access->ops->unmap for internal use Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 12/29] iommufd/viommu: Add driver-defined vDEVICE support Nicolin Chen
2025-07-07 7:41 ` Vasant Hegde
2025-07-05 1:13 ` [PATCH v8 13/29] iommufd/viommu: Introduce IOMMUFD_OBJ_HW_QUEUE and its related struct Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 14/29] iommufd/viommu: Add IOMMUFD_CMD_HW_QUEUE_ALLOC ioctl Nicolin Chen
2025-07-07 7:41 ` Vasant Hegde
2025-07-09 19:02 ` Nicolin Chen
2025-07-09 17:09 ` Jason Gunthorpe [this message]
2025-07-09 18:55 ` Nicolin Chen
2025-07-10 5:34 ` Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 15/29] iommufd/driver: Add iommufd_hw_queue_depend/undepend() helpers Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 16/29] iommufd/selftest: Add coverage for IOMMUFD_CMD_HW_QUEUE_ALLOC Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 17/29] iommufd: Add mmap interface Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 18/29] iommufd/selftest: Add coverage for the new " Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 19/29] Documentation: userspace-api: iommufd: Update HW QUEUE Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 20/29] iommu: Allow an input type in hw_info op Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 21/29] iommufd: Allow an input data_type via iommu_hw_info Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 22/29] iommufd/selftest: Update hw_info coverage for an input data_type Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 23/29] iommu/arm-smmu-v3-iommufd: Add vsmmu_size/type and vsmmu_init impl ops Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 24/29] iommu/arm-smmu-v3-iommufd: Add hw_info to impl_ops Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 25/29] iommu/tegra241-cmdqv: Use request_threaded_irq Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 26/29] iommu/tegra241-cmdqv: Simplify deinit flow in tegra241_cmdqv_remove_vintf() Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 27/29] iommu/tegra241-cmdqv: Do not statically map LVCMDQs Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 28/29] iommu/tegra241-cmdqv: Add user-space use support Nicolin Chen
2025-07-05 1:13 ` [PATCH v8 29/29] iommu/tegra241-cmdqv: Add IOMMU_VEVENTQ_TYPE_TEGRA241_CMDQV support Nicolin Chen
2025-07-09 17:33 ` [PATCH v8 00/29] iommufd: Add vIOMMU infrastructure (Part-4 HW QUEUE) Jason Gunthorpe
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