On Thu, Mar 28, 2019 at 03:13:07PM +0100, Borislav Petkov wrote: > On Thu, Mar 28, 2019 at 04:00:39PM +0200, Andy Shevchenko wrote: > > If it's _non-standard_ serial interface (by meaning of I/O accessors and > > port > > addresses), user may consider to use this options in case the interface to > > communicate with kernel is serial one and its configuration is done by other > > means (firmware / bootloader / EFI / etc). > > And is this non-standard interface out there in the wild or only at > Intel's labs?
Of course in the wild. > Are there boxes like that out there? One at hand now is called Intel Edison. > If I go to the store and buy a box, how do I know whether that box would > need "nocfg"? Do I look in the BIOS or how do I find out I need to supply > "nocfg"? By reading some technical documentation I suppose. What is your point here? earlyprintk is a mechanism for _debugging_, I suppose the user should have slightly more knowledge than user. > > If by BIOS or by other means the serial port is configured > > How do I find out that the serial port is configured? If you _already_ connected via it and get firmware / bootloader messages. -- With Best Regards, Andy Shevchenko
