diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2024-04-24 15:16:43 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-04-26 11:57:48 +0200 |
| commit | 65442507026a79e2de8014880e6ba376b8b44584 (patch) | |
| tree | cade4f7942266fc669011d824dc8e3c37e30c2cf /include/linux/iommu.h | |
| parent | deda9a7bf38fb9846ff3fb83179ca07437b1511c (diff) | |
iommu: Add ops->domain_alloc_sva()
Make a new op that receives the device and the mm_struct that the SVA
domain should be created for. Unlike domain_alloc_paging() the dev
argument is never NULL here.
This allows drivers to fully initialize the SVA domain and allocate the
mmu_notifier during allocation. It allows the notifier lifetime to follow
the lifetime of the iommu_domain.
Since we have only one call site, upgrade the new op to return ERR_PTR
instead of NULL.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Tina Zhang <tina.zhang@intel.com>
Link: https://lore.kernel.org/r/20240311090843.133455-15-vasant.hegde@amd.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20240416080656.60968-12-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index e6549bdfaed9..f4cdffa985e4 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -517,6 +517,7 @@ static inline int __iommu_copy_struct_from_user_array( * 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. * @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 @@ -557,6 +558,8 @@ struct iommu_ops { struct device *dev, u32 flags, struct iommu_domain *parent, const struct iommu_user_data *user_data); struct iommu_domain *(*domain_alloc_paging)(struct device *dev); + struct iommu_domain *(*domain_alloc_sva)(struct device *dev, + struct mm_struct *mm); struct iommu_device *(*probe_device)(struct device *dev); void (*release_device)(struct device *dev); |