[Qemu-devel] i82557 /i82558 network problems

[Christoph Schneider]

Hi all,
I am running a 2.4.4 kernel linux on my Qemu 1.0.1 VM (i386) with
Intel Pro/100 network driver version 2.3.38. As this driver does not support
standard e1000 network adapter, I picked i82558a (driver documentation
says it's network driver compatible).

Anyway, the network device is listed when entering ifconfig command and
boot messages indicate that e100 driver is loaded, but I am *not* able to
reach the host system.

When choosing the i82557a adapter instead, networking works fine.
This seems pretty strange to me, as (according to intel documenation),
the 82558 is a superset of the 82557 and I would expect both adapters to
work with the given settings.

Here is my syntax to start Qemu:

tunctl -u <username> -t tap0
ifconfig tap0 10.0.1.100 netmask 255.255.255.0 up
echo 1 > /proc/sys/net/ipv4/ip_forward
qemu-system-i386 -nodefaults -serial stdio -boot menu=on -cpu
Celeron_ULV -no-acpi -enable-kvm -L qemu-1.0.1/pc-bios -hda
qemu/cfimg_20120425_2 \
-netdev tap,ifname=tap0,script=no,id=usernet -device
i82557a,mac=52:54:00:12:34:56,netdev=usernet,bus=pci.0 -vga cirrus

Are there any known issues about these adapters/drivers with Qemu or can
anyone explain this behaviour? I would be really grateful about any
kind of hint.

Kind regards,
Christoph Schneider