On Fri, 31 Aug 2018 12:51:17 -0400 Collin Walling <walling@xxxxxxxxxxxxx> wrote: > The s390x diagnose 318 instruction sets the control program name code (CPNC) > and control program version code (CPVC) to provide usefu information regarding s/usefu/useful/ > the OS during debugging. The CPNC is explicitly set to 4 to indicate a Linux/KVM > environment. > > The CPVC is a 7-byte value containing: > > - 3-byte Linux version code > - 3-byte distribution identifier set in the config file > - 1-byte null > > The distro ID is set by the Kconfig option "Distribution Identifier" under the > "Processors Type and Features" section. > > Signed-off-by: Collin Walling <walling@xxxxxxxxxxxxx> > Acked-by: Janosch Frank <frankja@xxxxxxxxxxxxx> > Acked-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx> > --- > arch/s390/Kconfig | 8 ++++++++ > arch/s390/include/asm/diag.h | 12 ++++++++++++ > arch/s390/include/asm/sclp.h | 1 + > arch/s390/kernel/diag.c | 1 + > arch/s390/kernel/setup.c | 23 +++++++++++++++++++++++ > drivers/s390/char/sclp_early.c | 6 +++++- > 6 files changed, 50 insertions(+), 1 deletion(-) > > diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig > index 9a9c7a6..ca7fbd0fc 100644 > --- a/arch/s390/Kconfig > +++ b/arch/s390/Kconfig > @@ -595,6 +595,14 @@ config EXPOLINE_FULL > > endchoice > > +config DISTRO_ID > + string "Distribution Identifier" > + help > + This option sets a unique distribution identifier for this kernel build > + that will assist with internal problem diagnosis for IBM Z. > + > + Only the first three characters of this string will be utilized. Might be a good place to point to a registry for known values. And perhaps "If you don't know what to set here, leave this value empty."? > + > endmenu > > menu "Memory setup"
