When neither RTE_IOVA_VA nor RTE_IOVA_PA was explicitly
requested, DPDK would currently fallback to the default
RTE_IOVA_PA mode and possibly encounter a failure later
on if running as a non-priviledged user. Attempting to
use RTE_IOVA_VA if no phys addresses are available may
help in this case.
Signed-off-by: Darek Stojaczyk <dariusz.stojac...@intel.com>
---
lib/librte_eal/common/eal_common_bus.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/lib/librte_eal/common/eal_common_bus.c
b/lib/librte_eal/common/eal_common_bus.c
index 0943851cc..8b56979d7 100644
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -236,9 +236,19 @@ rte_bus_get_iommu_class(void)
mode |= bus->get_iommu_class();
}
- if (mode != RTE_IOVA_VA) {
- /* Use default IOVA mode */
- mode = RTE_IOVA_PA;
+ if (mode == RTE_IOVA_VA)
+ return RTE_IOVA_VA;
+
+ if (mode & RTE_IOVA_PA) {
+ /* Not all buses support RTE_IOVA_VA, fallback to RTE_IOVA_PA */
+ return RTE_IOVA_PA;
+ }
+
+ if (rte_eal_using_phys_addrs()) {
+ /* Default to RTE_IOVA_PA only if it's supported */
+ return RTE_IOVA_PA;
}
- return mode;
+
+ /* Since RTE_IOVA_PA is unsupported, fallback to RTE_IOVA_VA */
+ return RTE_IOVA_VA;
}
--
2.17.1
