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Date: Sun, 8 Jan 2012 12:59:13 +0100 (CET)
From: Gerhard Wiesinger <lists@wiesinger.com>
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Subject: Re: [Qemu-devel] Boot order problem and disable iPXE/gPXE
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To: qemu-devel@nongnu.org
Cc: Kevin O'Connor <kevin@koconnor.net>, Gerd Hoffmann <kraxel@redhat.com>, Gleb Natapov <gleb@redhat.com>

On Sat, 7 Jan 2012, Gerhard Wiesinger wrote:

> On Sat, 7 Jan 2012, Gerhard Wiesinger wrote:
>> No NIC:
>> -net none
>> => No iPXE ROM (correct).
>> 
>> but with the previously listed config no iPXE ROM should be there. Saw this 
>> is done through paravirtualization from Seabios/QEMU or KVM. So there
>> must be a bug with the empty romfile options with net or device (I guess) 
>> in QEMU/KVM.
>
> I think I found the bug:
> pcnet-pci.c
> static int pci_pcnet_init(PCIDevice *pci_dev)
> {
> ...
>    if (!pci_dev->qdev.hotplugged) {
>        static int loaded = 0;
>        if (!loaded) {
>            rom_add_option("pxe-pcnet.rom", -1);
>            loaded = 1;
>        }
>    }
>
> Option rom is added unconditionally regardless of command line options due to 
> hot plug feature ...
>
> grep -ir rom_add_option .
> ./ne2000.c:            rom_add_option("pxe-ne2k_pci.rom", -1);
> NE2000 also has the same problem.
>
> RTL8139 and all others are done through romfile which are working correct:
> ./rtl8139.c:    .romfile    = "pxe-rtl8139.rom",

I finally submitted a patch for fixing the issue:
[PATCH] network: Added option to disable NIC option roms

Ciao,
Gerhard

--
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