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Re: [Qemu-devel] Regression "Warning: more nics requested than this mach
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] Regression "Warning: more nics requested than this machine supports" |
Date: |
Fri, 20 May 2011 13:50:17 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2011-05-20 13:19, Peter Maydell wrote:
> On 16 May 2011 17:58, Markus Armbruster <address@hidden> wrote:
>> $ 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
>> net: Improve the warnings for dubious command line option combinations
>
>> Its count of requested NICs is blissfully unaware of -device. In my
>> example, it comes up with nb_nics == 0 and seen_nics == 1.
>
> As far as I can determine, "-device e1000,netdev=0" doesn't go through
> net_init_nic() and doesn't put an entry in the nd_table[] for the NIC.
> This means it's broken, because a lot of board models look in nd_table[]
> to determine whether the user requested a NIC and whether it's the right
> type. So I think that in some ways this is just showing up an existing
> problem with trying to instantiate a network card with -device.
qemu_new_nic must call net_init_nic so that this works properly. Of
course we need to avoid calling it multiple times when the adapter is
still instantiated via the old -net or via board init code.
Jan
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