[dpdk-dev] [PATCH 1/2] eal: honor IOVA mode for no-huge case

Jianfeng Tan jianfeng.tan at intel.com
Wed Oct 11 12:33:47 CEST 2017


With the introduction of IOVA mode, the only blocker to run
with 4KB pages for NICs binding to vfio-pci, is that
RTE_BAD_PHYS_ADDR is not a valid IOVA address.

We can refine this by using VA as IOVA if it's IOVA mode.

Signed-off-by: Jianfeng Tan <jianfeng.tan at intel.com>
---
 lib/librte_eal/linuxapp/eal/eal_memory.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 28bca49..187d338 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -1030,7 +1030,10 @@ rte_eal_hugepage_init(void)
 					strerror(errno));
 			return -1;
 		}
-		mcfg->memseg[0].phys_addr = RTE_BAD_PHYS_ADDR;
+		if (rte_eal_iova_mode() == RTE_IOVA_VA)
+			mcfg->memseg[0].phys_addr = (uintptr_t)addr;
+		else
+			mcfg->memseg[0].phys_addr = RTE_BAD_PHYS_ADDR;
 		mcfg->memseg[0].addr = addr;
 		mcfg->memseg[0].hugepage_sz = RTE_PGSIZE_4K;
 		mcfg->memseg[0].len = internal_config.memory;
-- 
2.7.4



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