Watch this: $ qemu-system-x86_64 -nodefaults -enable-kvm -m 384 -vnc :0 -S -netdev user,id=net0 -device e1000,netdev=net0 Warning: more nics requested than this machine supports; some have been ignored (qemu) info network Devices not on any VLAN: net0: net=10.0.2.0, restricted=n peer=e1000.0 e1000.0: model=e1000,macaddr=52:54:00:12:34:56 peer=net0
Culprit is commit f68b9d672b90dedc79aeb9b44607f484dbe46a6b Author: Peter Maydell <peter.mayd...@linaro.org> Date: Tue Mar 22 18:39:40 2011 +0000 net: Improve the warnings for dubious command line option combinations Improve the warnings we give if the user specified a combination of -net options which don't make much sense: * Don't warn about anything if the config is the implicit default "-net user -net nic" rather than one specified by the user (this will only kick in for boards with no NIC or if CONFIG_SLIRP is not set) * Diagnose the case where the user asked for NICs which the board didn't instantiate (for example where the user asked for two NICs but the board only supports one) Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> Signed-off-by: Aurelien Jarno <aurel...@aurel32.net> Its count of requested NICs is blissfully unaware of -device. In my example, it comes up with nb_nics == 0 and seen_nics == 1.