[dpdk-stable] [PATCH 3/6] eal: check hugepages within dma mask range

[Alejandro Lucero <alejandro.lucero@netronome.com>]

Hugepages get an iova address which could be out of range
for devices with addressing limitations. This patch checks
hugepages are withint the range if dma mask is set by a device.

Signed-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>
---
 lib/librte_eal/common/eal_private.h | 3 +++
 lib/librte_eal/linuxapp/eal/eal.c   | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/lib/librte_eal/common/eal_private.h b/lib/librte_eal/common/eal_private.h
index 462226f..05db535 100644
--- a/lib/librte_eal/common/eal_private.h
+++ b/lib/librte_eal/common/eal_private.h
@@ -224,4 +224,7 @@
  */
 struct rte_bus *rte_bus_find_by_device_name(const char *str);
 
+/* if dma mask set by a device, check hugepages are not out of range */
+int rte_eal_memory_dma_mask_check(void);
+
 #endif /* _EAL_PRIVATE_H_ */
diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index 229eec9..eaa9325 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -960,6 +960,10 @@ static void rte_eal_init_alert(const char *msg)
 		return -1;
 	}
 
+	/* If dma mask set, check hugepages iovas are within the range */
+	if (rte_eal_memory_dma_mask_check() < 0)
+		rte_panic("iovas out of range\n");
+
 	/* initialize default service/lcore mappings and start running. Ignore
 	 * -ENOTSUP, as it indicates no service coremask passed to EAL.
 	 */
-- 
1.9.1