On Thu, 4 Sep 2014, Neale Ferguson wrote:
> Sebastian, at what point and by what bit of software does the change of 
> condev to an actual device address?

This all happens in the Linux Kernel early during IPL. The translation
from "condev" to the actual device number takes place when we parse the
kernel command line. To get the device number we just use the information
provided by the console driver (and if that information is incorrect we
fail to IPL regardless of specifying "condev"). When we scan for ccw
devices later during IPL we omit those on the ignore list.

Regards,
Sebastian

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