iommu/vt-d: Set SSADE when attaching to a parent with dirty tracking

Should set the SSADE (Second Stage Access/Dirty bit Enable) bit of the
pasid entry when attaching a device to a nested domain if its parent
has already enabled dirty tracking.

Fixes: 111bf85 ("iommu/vt-d: Add helper to setup pasid nested translation")
Signed-off-by: Yi Liu <[email protected]>
Reviewed-by: Joao Martins <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lu Baolu <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>

Author: yiliu1765

drivers/iommu/intel/pasid.c

@@ -657,6 +657,8 @@ int intel_pasid_setup_nested(struct intel_iommu *iommu, struct device *dev,
 	pasid_set_domain_id(pte, did);
 	pasid_set_address_width(pte, s2_domain->agaw);
 	pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap));
+	if (s2_domain->dirty_tracking)
+		pasid_set_ssade(pte);
 	pasid_set_translation_type(pte, PASID_ENTRY_PGTT_NESTED);
 	pasid_set_present(pte);
 	spin_unlock(&iommu->lock);