Re: [PATCH] virtio_console: Add support for multiple ports for generic guest and host communication

[Alan Cox <alan@linux.intel.com>]

> We do actually want hangup and a few other of the tty specific ops.
> The only thing we really don't want is a baud rate.

So you need break, parity ... no be serious please

> This device cannot be implemented as-is in userspace because it
> depends on DMA which precludes the use of something like uio_pci.  We
> could modify the device to avoid dma if the feeling was that there
> was no interest in putting this in the kernel.

So you need a tiny kernel side driver to unpack it into a meaningful
fs, or just a user-user channel with a daemon each end and a protocol
over it - nothing kernel in that.

We don't implement tcp/ip http sessions as tty devices with the kernel
as web server and the same logic applies here.