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

[Yi Liu]

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....@intel.com>
---
base commit: 547ab8fc4cb04a1a6b34377dd8fad34cd2c8a8e3
---
 drivers/iommu/intel/pasid.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c
index 3239cefa4c33..9be24bb762cf 100644
--- a/drivers/iommu/intel/pasid.c
+++ b/drivers/iommu/intel/pasid.c
@@ -658,6 +658,8 @@ 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);
-- 
2.34.1