- /* autodetect the IOVA mapping mode (default is RTE_IOVA_PA) */
- rte_eal_get_configuration()->iova_mode =
- rte_bus_get_iommu_class();
-
+ /* autodetect the IOVA mapping mode */
+ enum rte_iova_mode iova_mode = rte_bus_get_iommu_class();
+
+ if (iova_mode == RTE_IOVA_DC) {
+ RTE_LOG(DEBUG, EAL, "Buses did not request a specific IOVA mode.\n");
+
+ if (!phys_addrs) {
+ /* if we have no access to physical addresses,
+ * pick IOVA as VA mode.
+ */
+ iova_mode = RTE_IOVA_VA;
+ RTE_LOG(DEBUG, EAL, "Physical addresses are unavailable, selecting IOVA as VA mode.\n");
+ } else if (is_iommu_enabled()) {
+ /* we have an IOMMU, pick IOVA as VA mode */
+ iova_mode = RTE_IOVA_VA;
+ RTE_LOG(DEBUG, EAL, "IOMMU is available, selecting IOVA as VA mode.\n");
+ } else {
+ /* physical addresses available, and no IOMMU
+ * found, so pick IOVA as PA.
+ */
+ iova_mode = RTE_IOVA_PA;
+ RTE_LOG(DEBUG, EAL, "IOMMU is not available, selecting IOVA as PA mode.\n");
+ }
+ }
+#ifdef RTE_LIBRTE_KNI