z/VM: CP Commands and Utilities Reference - z/VM - IBM

DEFSYS
Options
214 z/VM: CP Commands and Utilities Reference
Any page ranges defined in segment zero must have an exclusive page
descriptor code (EW, ER, or EN). If any pages in segment zero are defined with
a shared access page descriptor code, the command is rejected.
MINSIZE=nnnnnnnK
MINSIZE=nnnnM
indicates the minimum storage size of the virtual machine into which the NSS
can be loaded. The operand nnnnnnnK is the storage size in decimal kilobytes;
nnnnM is the storage size in decimal megabytes.
RSTD
indicates a restricted NSS. The user must have a corresponding NAMESAVE
directory statement to access this NSS.
PARMREGS=m
PARMREGS=m-n
PARMREGS=NONE
specifies a range of general purpose registers to contain the IPL parameter
string when the NSS receives control from the control program.
The operands m and n are decimal values from 0 to 15. If you specify two
registers, n must be greater than or equal to m. If only one register is required,
you may specify PARMREGS=m.
NONE specifies that no parameters may be passed to this NSS.
Note: If you want to use the AUTOCR, BATCH, NOSPROF, INSTSEG, or
SAVESYS parameters of the IPL command, you must have
PARMREGS=0-15 in the DEFSYS command for the CMS named saved
system.
VMGROUP
specifies that a user who IPLs this NSS becomes a member of a virtual
machine group, identified by the name of the NSS.
MACHMODE mm
specifies the set of virtual machine modes in which this NSS can be saved and
IPLed.
The operand mm is a list of one or more virtual machine modes, separated by
commas with no intervening blanks. Each entry in this list is one of the virtual
machine mode designators ESA, XA, or XC. ESA designates ESA/390 mode,
although a guest may have the capability to issue an instruction to switch the
virtual machine to z/Architecture mode. XA is supported for compatibility and is
functionally equivalent to ESA. XC designates ESA/XC mode.
If more than one machine mode is specified with this parameter, the NSS is
known as a multimode NSS. Special considerations apply regarding the
information saved by the SAVESYS command and restored by the IPL
command for a multimode NSS; see the description for the SAVESYS
command for these special considerations. However, for purposes of
determining if the NSS is multimode or not, the designations XA and ESA are
considered synonyms. If both are specified, the pair is treated as a single
machine mode specification rather than two. That is, specifying 'MACHMODE
XA,ESA' does not result in the NSS being considered a multimode NSS.