Hi, this is the patch to introduce a NIC model fallback to default when model specified is not supported. It's been tested on i386-softmmu target on i386 host using the Windows XP x86 virtual machine and by trying to setup the invalid (unsupported) model of NIC device. Also, the new constant in the net.h called the DEFAULT_NIC_MODEL has been introduced to be able to change the default NIC model easily. This variable is being used to set the default NIC model when necessary. Also, some bits per mips_jazz were added but usage of some constant for MIPS is not necessary since there is only one NIC model supported there. Michal Signed-off-by: Michal Novotny -- Michal Novotny, RHCE Virtualization Team (xen userspace), Red Hat