diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2024-11-14 22:55:30 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2024-11-22 21:43:45 +0300 |
| commit | 64214c2b95364d26cdff045d8bbefd37380edbe1 (patch) | |
| tree | 15141f250e8dea847afd15e2d096ff96a7b15dfb /include/linux | |
| parent | 2d762281950877eb450ac98bc77a6d340f6b5249 (diff) | |
| download | linux-64214c2b95364d26cdff045d8bbefd37380edbe1.tar.xz | |
iommu: Add ops->domain_alloc_nested()
It turns out all the drivers that are using this immediately call into
another function, so just make that function directly into the op. This
makes paging=NULL for domain_alloc_user and we can remove the argument in
the next patch.
The function mirrors the similar op in the viommu that allocates a nested
domain on top of the viommu's nesting parent. This version supports cases
where a viommu is not being used.
Link: https://patch.msgid.link/r/1-v1-c252ebdeb57b+329-iommu_paging_flags_jgg@nvidia.com
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/iommu.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index d6aaaec3caf4..0472cc124519 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -559,15 +559,13 @@ iommu_copy_struct_from_full_user_array(void *kdst, size_t kdst_entry_size, * the caller iommu_domain_alloc() returns. * @domain_alloc_user: Allocate an iommu domain corresponding to the input * parameters as defined in include/uapi/linux/iommufd.h. - * Upon success, if the @user_data is valid and the @parent - * points to a kernel-managed domain, the new domain must be - * IOMMU_DOMAIN_NESTED type; otherwise, the @parent must be - * NULL while the @user_data can be optionally provided, the + * The @user_data can be optionally provided, the * new domain must support __IOMMU_DOMAIN_PAGING. * Upon failure, ERR_PTR must be returned. * @domain_alloc_paging: Allocate an iommu_domain that can be used for * UNMANAGED, DMA, and DMA_FQ domain types. * @domain_alloc_sva: Allocate an iommu_domain for Shared Virtual Addressing. + * @domain_alloc_nested: Allocate an iommu_domain for nested translation. * @probe_device: Add device to iommu driver handling * @release_device: Remove device from iommu driver handling * @probe_finalize: Do final setup work after the device is added to an IOMMU @@ -622,6 +620,9 @@ struct iommu_ops { struct iommu_domain *(*domain_alloc_paging)(struct device *dev); struct iommu_domain *(*domain_alloc_sva)(struct device *dev, struct mm_struct *mm); + struct iommu_domain *(*domain_alloc_nested)( + struct device *dev, struct iommu_domain *parent, u32 flags, + const struct iommu_user_data *user_data); struct iommu_device *(*probe_device)(struct device *dev); void (*release_device)(struct device *dev); |