Change Details

Make the tree search in iommu_gas_lowermatch a symmetric reflection of the one in iommu_gas_uppermatch.

Make the tree search in iommu_gas_lowermatch a symmetric reflection of the one in iommu_gas_uppermatch. That makes it a last-fit search.

Make the tree search in iommu_gas_lowermatch a symmetric reflection of the one in iommu_gas_uppermatch. That makes it a last-fit search.