On Thu, Feb 09, 2017 at 02:53:52PM +0100, Andrea Bolognani wrote: > On Wed, 2017-02-08 at 19:36 +0000, Peter Maydell wrote: > > The trouble with using virtconsole is that you have to > > get quite a long way forward (probing and setting up > > PCI, etc) before you can get any kind of console output. > > "System doesn't boot and doesn't produce any output" > > is a common and really annoying failure mode in the > > ARM world, and I think that using virtconsole is > > asking for that kind of thing to happen more rather > > than less often. (Plus having two different serial > > ports in the guest means that now the user has to > > configure where both of them are supposed to output.) > > You don't get one unless you use '-serial stdio' or > something like that in my experience, so if you use the > sample configuration file as I posted it you will only > get one serial console, the VirtIO-based one.
The emulated UART is there no matter what, it's built-in on the board. Whether it gets wired up to the console, stdio in this case, depends on the '-serial stdio'. Adding the virtio- console introduces another serial port, but OSes can still discover the PL011 and try to use that in addition. Thanks, drew
