diff --git a/drivers/iommu/sw64/sunway_iommu.c b/drivers/iommu/sw64/sunway_iommu.c
index b6c8f1272d28fc9de9575fa9d245eb8434396704..580619c6a571e8944130c622fed8e13b17cc78a1 100644
--- a/drivers/iommu/sw64/sunway_iommu.c
+++ b/drivers/iommu/sw64/sunway_iommu.c
@@ -1382,7 +1382,7 @@ static struct iommu_domain *sunway_iommu_domain_alloc(unsigned type)
 
 		sdomain->pt_root = (void *)get_zeroed_page(GFP_KERNEL);
 
-		sdomain->domain.geometry.aperture_start = SW64_DMA_START;
+		sdomain->domain.geometry.aperture_start = 0ULL;
 		sdomain->domain.geometry.aperture_end	= (~0ULL);
 		sdomain->domain.geometry.force_aperture	= true;
 		sdomain->type = IOMMU_DOMAIN_UNMANAGED;