eal/linux: force IOVA as PA mode if KNI module inserted

[dpdk.git] / lib / librte_eal / linuxapp / eal / eal.c

diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index a5a71c6a646b9e56405ea380681e61f71ade1b51..229eec9f114427dc4fca4c426332d65275e90052 100644 (file)
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -807,6 +807,15 @@ rte_eal_init(int argc, char **argv)
        /* autodetect the iova mapping mode (default is iova_pa) */
        rte_eal_get_configuration()->iova_mode = rte_bus_get_iommu_class();
 
+       /* Workaround for KNI which requires physical address to work */
+       if (rte_eal_get_configuration()->iova_mode == RTE_IOVA_VA &&
+                       rte_eal_check_module("rte_kni") == 1) {
+               rte_eal_get_configuration()->iova_mode = RTE_IOVA_PA;
+               RTE_LOG(WARNING, EAL,
+                       "Some devices want IOVA as VA but PA will be used because.. "
+                       "KNI module inserted\n");
+       }
+
        if (internal_config.no_hugetlbfs == 0 &&
                        internal_config.process_type != RTE_PROC_SECONDARY &&
                        eal_hugepage_info_init() < 0) {