On 08/05/2015 11:36, Thomas Huth wrote: > Looking at the output of "qemu-system-xxx -help", you easily get > the impression that "-net" is the preferred way instead of "-netdev" > to specify host network interface, since the "-net" option is > omnipresent but the "-netdev" option is only listed as a one-liner > at the end. This is ugly since "-net" is considered as legacy and > even might be removed one day. Thus, this patch switches the output > to explain the host network interfaces with the "-netdev" option > instead, moving the legacy "-net" option into some few lines at > the end. > > Signed-off-by: Thomas Huth <th...@redhat.com> > --- > qemu-options.hx | 66 > ++++++++++++++++++++++++++++++++++----------------------- > 1 file changed, 39 insertions(+), 27 deletions(-)
That would be great if it worked for all machine types, but it doesn't. For example, there's no equivalent of: $ qemu-system-arm -net user -net nic -machine versatilepb You cannot just use -netdev: $ qemu-system-arm -netdev user,id=nd0 -machine versatilepb Warning: netdev nd0 has no peer You cannot use -netdev and -net together: $ qemu-system-arm -netdev user,id=nd0 -net nic -machine versatilepb Warning: vlan 0 is not connected to host network Warning: netdev nd0 has no peer This particular board has a PCI controller, so you can just add a PCI NIC using -netdev/-device, but still that wouldn't be a match for "-net user -net nic" (which puts a smc91c111 NIC on sysbus). In most embedded boards there's not even a PCI controller. So the patch is great, but I wouldn't say it's deprecated, because in practice it isn't. Paolo