macvtap/tun: cross-endian support for little-endian hosts

[cascardo/linux.git] / drivers / net / Kconfig

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index df51d60..71ac0ec 100644 (file)
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -244,6 +244,20 @@ config TUN
 
          If you don't know what to use this for, you don't need it.
 
+config TUN_VNET_CROSS_LE
+       bool "Support for cross-endian vnet headers on little-endian kernels"
+       default n
+       ---help---
+         This option allows TUN/TAP and MACVTAP device drivers in a
+         little-endian kernel to parse vnet headers that come from a
+         big-endian legacy virtio device.
+
+         Userspace programs can control the feature using the TUNSETVNETBE
+         and TUNGETVNETBE ioctls.
+
+         Unless you have a little-endian system hosting a big-endian virtual
+         machine with a legacy virtio NIC, you should say N.
+
 config VETH
        tristate "Virtual ethernet pair device"
        ---help---