[PATCH v5 2/4] iommu_pt: support small VA for AMDv1

[Ankit Soni]

When hardware/VM request a small VA limit, the generic page-table code
clears PT_FEAT_DYNAMIC_TOP. This later causes domain initialization to
fail with -EOPNOTSUPP.

Remove the clearing so init succeeds when the VA fits in the starting
level and no top-level growth is needed.

Signed-off-by: Ankit Soni <Ankit.Soni@xxxxxxx>
---
 drivers/iommu/generic_pt/iommu_pt.h | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/iommu/generic_pt/iommu_pt.h b/drivers/iommu/generic_pt/iommu_pt.h
index f150e3a7f545..d91981e2128b 100644
--- a/drivers/iommu/generic_pt/iommu_pt.h
+++ b/drivers/iommu/generic_pt/iommu_pt.h
@@ -1129,10 +1129,6 @@ static int pt_init_common(struct pt_common *common)
 	if (PT_WARN_ON(top_range.top_level > PT_MAX_TOP_LEVEL))
 		return -EINVAL;
 
-	if (top_range.top_level == PT_MAX_TOP_LEVEL ||
-	    common->max_vasz_lg2 == top_range.max_vasz_lg2)
-		common->features &= ~BIT(PT_FEAT_DYNAMIC_TOP);
-
 	if (top_range.max_vasz_lg2 == PT_VADDR_MAX_LG2)
 		common->features |= BIT(PT_FEAT_FULL_VA);
 
-- 
2.43.0