On Mon, Feb 12, 2018 at 08:47:57AM -0500, Prarit Bhargava wrote: > > > On 02/12/2018 08:34 AM, Peter Zijlstra wrote: > > On Thu, Jan 18, 2018 at 10:09:51AM -0500, Prarit Bhargava wrote: > >> config ACPI_SPCR_TABLE > >> + bool "ACPI Serial Port Console Redirection Support" > >> + default y if X86 > >> + help > >> + Enable support for Serial Port Console Redirection (SPCR) Table. > >> + This table provides information about the configuration of the > >> + earlycon console. > > > > I just got asked this by oldconfig, which left me rather puzzled, WTF > > does this do? > > Odd -- I thought I had taken care of that :( My apologies Peter. > > ACPI SPCR is used by a vendor to define the serial console for a system. If > SPCR exists a user can add kernel parameter "earlycon" (no extra kernel > parameters) and the console will work out-of-the-box. > > The serial console configuration varies from vendor to vendor. This takes the > guess-work out of defining a serial console. But when I specify "earlyprintk=serial,ttyS0,115200" this SPCR crud will not interfere? -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
