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: 111bf85c68f6 ("iommu/vt-d: Add helper to setup pasid nested translation")
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Link: https://lore.kernel.org/r/20240208091414.28133-1-yi.l.liu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c
index a32d7e509842d83309a61ba1730ff2231c4a6b99..108158e2b907d0744467d88e8ec35b419185555b 100644 (file)
--- a/drivers/iommu/intel/pasid.c
+++ b/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);