[PATCH v2 2/4] iommu/vt-d: Set PGSNP bit in pasid table entry for SVA binding

[Lu Baolu]

This field make the requests snoop processor caches irrespective of
other attributes in the request or other fields in paging structure
entries used to translate the request.

Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
---
 drivers/iommu/intel/svm.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 23a38763c1d1..c720d1be992d 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -391,9 +391,12 @@ static struct iommu_sva *intel_svm_bind_mm(struct intel_iommu *iommu,
 	}
 
 	/* Setup the pasid table: */
-	sflags = (flags & SVM_FLAG_SUPERVISOR_MODE) ?
-			PASID_FLAG_SUPERVISOR_MODE : 0;
-	sflags |= cpu_feature_enabled(X86_FEATURE_LA57) ? PASID_FLAG_FL5LP : 0;
+	sflags = PASID_FLAG_PAGE_SNOOP;
+	if (flags & SVM_FLAG_SUPERVISOR_MODE)
+		sflags |= PASID_FLAG_SUPERVISOR_MODE;
+	if (cpu_feature_enabled(X86_FEATURE_LA57))
+		sflags |= PASID_FLAG_FL5LP;
+
 	spin_lock_irqsave(&iommu->lock, iflags);
 	ret = intel_pasid_setup_first_level(iommu, dev, mm->pgd, mm->pasid,
 					    FLPT_DEFAULT_DID, sflags);
-- 
2.25.1