iommu/vt-d: Add domain_alloc_paging support

Add the domain_alloc_paging callback for domain allocation using the
iommu_paging_domain_alloc() interface.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20241021085125.192333-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 9f6b0780f2ef5e7347d702b5337d99edbcc92292..4803e0cb82796ae56e13ac39f713e6dd042c2351 100644 (file)
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -4590,6 +4590,19 @@ static struct iommu_domain identity_domain = {
        },
 };
 
+static struct iommu_domain *intel_iommu_domain_alloc_paging(struct device *dev)
+{
+       struct dmar_domain *dmar_domain;
+       bool first_stage;
+
+       first_stage = first_level_by_default(0);
+       dmar_domain = paging_domain_alloc(dev, first_stage);
+       if (IS_ERR(dmar_domain))
+               return ERR_CAST(dmar_domain);
+
+       return &dmar_domain->domain;
+}
+
 const struct iommu_ops intel_iommu_ops = {
        .blocked_domain         = &blocking_domain,
        .release_domain         = &blocking_domain,
@@ -4599,6 +4612,7 @@ const struct iommu_ops intel_iommu_ops = {
        .domain_alloc           = intel_iommu_domain_alloc,
        .domain_alloc_user      = intel_iommu_domain_alloc_user,
        .domain_alloc_sva       = intel_svm_domain_alloc,
+       .domain_alloc_paging    = intel_iommu_domain_alloc_paging,
        .probe_device           = intel_iommu_probe_device,
        .release_device         = intel_iommu_release_device,
        .get_resv_regions       = intel_iommu_get_resv_regions,