Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
 hmp-commands.hx |  2 +-
 qemu-options.hx | 11 ++++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/hmp-commands.hx b/hmp-commands.hx
index 64008a9..c204d31 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1169,7 +1169,7 @@ ETEXI
     {
         .name       = "netdev_add",
         .args_type  = "netdev:O",
-        .params     = "[user|tap|socket],id=str[,prop=value][,...]",
+        .params     = "[user|tap|socket|hubport],id=str[,prop=value][,...]",
         .help       = "add host network device",
         .mhandler.cmd = hmp_netdev_add,
     },
diff --git a/qemu-options.hx b/qemu-options.hx
index 4bc9c85..cd18ad1 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1404,7 +1404,8 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
 #ifdef CONFIG_VDE
     "vde|"
 #endif
-    "socket],id=str[,option][,option][,...]\n", QEMU_ARCH_ALL)
+    "socket|"
+    "hubport],id=str[,option][,option][,...]\n", QEMU_ARCH_ALL)
 STEXI
 @item -net nic[,vlan=@var{n}][,macaddr=@var{mac}][,model=@var{type}] 
[,name=@var{name}][,addr=@var{addr}][,vectors=@var{v}]
 @findex -net
@@ -1726,6 +1727,14 @@ vde_switch -F -sock /tmp/myswitch
 qemu-system-i386 linux.img -net nic -net vde,sock=/tmp/myswitch
 @end example
 
+@item -netdev hubport,id=@var{id},hubid=@var{hubid}
+
+Create a hub port on QEMU "vlan" @var{hubid}.  This syntax is an alternative to
+the @code{-net @option{vlan}} argument and can be used to connect a NIC
+specified with @code{-device ...,netdev=@var{id}} to a QEMU "vlan".
+
+Note that only NICs can be connected to a hubport, other -netdevs cannot.
+
 @item -net dump[,vlan=@var{n}][,file=@var{file}][,len=@var{len}]
 Dump network traffic on VLAN @var{n} to file @var{file} 
(@file{qemu-vlan0.pcap} by default).
 At most @var{len} bytes (64k by default) per packet are stored. The file 
format is
-- 
1.8.1.2


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