kni: abort when IOVA is not PA

If a forced iova-mode has been passed at init, kni is not supposed to
work.

Fixes: 075b182b54ce ("eal: force IOVA to a particular mode")
Cc: stable@dpdk.org
Signed-off-by: David Marchand <david.marchand@redhat.com>

diff --git a/lib/librte_kni/rte_kni.c b/lib/librte_kni/rte_kni.c
index 00104a3..e60de2c 100644 (file)
--- a/lib/librte_kni/rte_kni.c
+++ b/lib/librte_kni/rte_kni.c
@@ -97,6 +97,11 @@ static volatile int kni_fd = -1;
 int
 rte_kni_init(unsigned int max_kni_ifaces __rte_unused)
 {
+       if (rte_eal_iova_mode() != RTE_IOVA_PA) {
+               RTE_LOG(ERR, KNI, "KNI requires IOVA as PA\n");
+               return -1;
+       }
+
        /* Check FD and open */
        if (kni_fd < 0) {
                kni_fd = open("/dev/" KNI_DEVICE, O_RDWR);