iommufd: Enable PRI when doing the iommufd_hwpt_alloc

Add IOMMU_HWPT_FAULT_ID_VALID as part of the valid flags when doing an
iommufd_hwpt_alloc allowing the use of an iommu fault allocation
(iommu_fault_alloc) with the IOMMU_HWPT_ALLOC ioctl.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Joel Granados <joel.granados@kernel.org>
Link: https://lore.kernel.org/r/20241015-jag-iopfv8-v4-4-b696ca89ba29@kernel.org
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: Joelgranados

drivers/iommu/intel/iommu.c

@@ -3315,7 +3315,8 @@ intel_iommu_domain_alloc_user(struct device *dev, u32 flags,
 	}
 
 	if (flags &
-	    (~(IOMMU_HWPT_ALLOC_NEST_PARENT | IOMMU_HWPT_ALLOC_DIRTY_TRACKING)))
+	    (~(IOMMU_HWPT_ALLOC_NEST_PARENT | IOMMU_HWPT_ALLOC_DIRTY_TRACKING
+	       | IOMMU_HWPT_FAULT_ID_VALID)))
 		return ERR_PTR(-EOPNOTSUPP);
 	if (nested_parent && !nested_supported(iommu))
 		return ERR_PTR(-EOPNOTSUPP);

drivers/iommu/iommufd/hw_pagetable.c

@@ -107,7 +107,8 @@ iommufd_hwpt_paging_alloc(struct iommufd_ctx *ictx, struct iommufd_ioas *ioas,
 			  const struct iommu_user_data *user_data)
 {
 	const u32 valid_flags = IOMMU_HWPT_ALLOC_NEST_PARENT |
-				IOMMU_HWPT_ALLOC_DIRTY_TRACKING;
+				IOMMU_HWPT_ALLOC_DIRTY_TRACKING |
+				IOMMU_HWPT_FAULT_ID_VALID;
 	const struct iommu_ops *ops = dev_iommu_ops(idev->dev);
 	struct iommufd_hwpt_paging *hwpt_paging;
 	struct iommufd_hw_pagetable *hwpt;