From 65442507026a79e2de8014880e6ba376b8b44584 Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Wed, 24 Apr 2024 15:16:43 +0800 Subject: 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 Signed-off-by: Vasant Hegde Reviewed-by: Tina Zhang Link: https://lore.kernel.org/r/20240311090843.133455-15-vasant.hegde@amd.com Signed-off-by: Lu Baolu Reviewed-by: Kevin Tian Link: https://lore.kernel.org/r/20240416080656.60968-12-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel --- include/linux/iommu.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') 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); -- cgit v1.2.3