iommu: Remove ops->pgsize_bitmap

No driver uses it now, remove the core code.

Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Link: https://lore.kernel.org/r/7-v2-68a2e1ba507c+1fb-iommu_rm_ops_pgsize_jgg@nvidia.com
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

Author: jgunthorpe

drivers/iommu/iommu.c

@@ -2002,13 +2002,6 @@ static void iommu_domain_init(struct iommu_domain *domain, unsigned int type,
 	domain->owner = ops;
 	if (!domain->ops)
 		domain->ops = ops->default_domain_ops;
-
-	/*
-	 * If not already set, assume all sizes by default; the driver
-	 * may override this later
-	 */
-	if (!domain->pgsize_bitmap)
-		domain->pgsize_bitmap = ops->pgsize_bitmap;
 }
 
 static struct iommu_domain *

include/linux/iommu.h

@@ -604,7 +604,6 @@ iommu_copy_struct_from_full_user_array(void *kdst, size_t kdst_entry_size,
  *                It is required to call iommufd_viommu_alloc() helper for
  *                a bundled allocation of the core and the driver structures,
  *                using the given @ictx pointer.
- * @pgsize_bitmap: bitmap of all possible supported page sizes
  * @owner: Driver module providing these ops
  * @identity_domain: An always available, always attachable identity
  *                   translation.
@@ -659,7 +658,6 @@ struct iommu_ops {
 		struct iommufd_ctx *ictx, unsigned int viommu_type);
 
 	const struct iommu_domain_ops *default_domain_ops;
-	unsigned long pgsize_bitmap;
 	struct module *owner;
 	struct iommu_domain *identity_domain;
 	struct iommu_domain *blocked_domain;