z/VM New Function Variable List


Last Updated: 14 October 2021


The table below contains a listing of variables and associated data used for indicating z/VM new function. Mouse over the table headers for descriptions on the columns. The data can be sorted by clicking on the table headers, and data in the table can be filtered by using the text input field on the right.

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A list of new function variables and details
Release APAR APAR name Environment variable name Data type Variable value Variable value description Last updated
7.2 VM66479 Spool Information Enhancements CP.FUNCTION.SPOOL.EXTENSIONS

This variable indicates whether support for Spool Information Enhancements is installed.

support level 1 Version 1 of Spool Information Enhancements is installed. 20211013October 13, 2021
7.2 VM66507 EDEVICE Path Management CP.FUNCTION.EDEVICE.PATH_MANAGEMENT

This variable indicates whether support for EDEVICE Path Management is installed.

support level 1 Version 1 of EDEVICE Path Management is installed. 20210831August 31, 2021
7.2 VM66557 VSwitch Bridge Port Enhancements CP.FUNCTION.VSWITCH.NICDISTRIBUTION

This variable indicates the ability to configure the NICDistribution setting for a VSwitch BridgePort.

support level 1 The NICDISTRIBUTION function for a VSWITCH BRIDGEPORT is installed on this system. 20210812August 12, 2021
7.2 TBD Host Exploitation of Crypto Interruptions CP.FUNCTION.CRYPTO.INTERRUPTIONS

This variable indicates whether support for Host Exploitation of Crypto Interruptions is installed.

support level 1 Version 1 of Host Exploitation of Crypto Interruptions is installed. 20210504May 4, 2021
7.2 VM66496 Mixed-APVIRT LGR CP.FUNCTION.CRYPTO.MIXED_APVIRT_LGR

This variable indicates whether support for Improved Live Guest Relocation for Shared Crypto Users (aka LGR for Mixed APVIRT) is installed.

support level 1 Version 1 of LGR for Mixed APVIRT is installed. 20210420April 20, 2021
7.2 TBD Preserve Partial Dump Across IPL CP.FUNCTION.DUMP.PRESERVE_PARTIAL

The variable indicates whether the support for preserving a partial dump across a re-IPL is present.

support level 1 Preserve Partial Dump Across IPL is installed. 20210127January 27, 2021
7.2 VM66485 IPV6 Layer 2 Query Support CP.FUNCTION.VSWITCH.IPV6QUERY

This variable indicates that IPv6 addresses for Layer 2 VSwitches will be displayed on the QUERY VSWITCH and the QUERY VIRTUAL NIC commands and on the output of the DIAG '26C'.

support level 1 IPV6 Layer 2 Query Support is installed. 20210420April 20, 2021
7.2 VM66469 CP QUERY DEVICES CP.FUNCTION.QUERY.DEVICES

This variable indicates the ability to report real device settings established by the DEVICES configuration statement and the SET DEVICES command.

support level 1 CP QUERY DEVICES function is installed. 20201008October 8, 2020
7.2 VM66449 VARY ON RDEV Multi Processor Support CP.FUNCTION.DASD.MP_VARY_RDEV

This variable indicates the presence of multi processor support for the VARY ON RDEV command.

support level 1 The VARY ON RDEV command now has the ability to complete its processing using multiple threads running on any processor. This work previously was limited to running on only the master processor. This ability reduces the response time of large VARY ON RDEV commands. 20211013October 14, 2021
7.2 VM66173 Dynamic Memory Downgrade CP.FUNCTION.MEMORY.RECLAIM

This variable indicates the presence of functionality which allows real memory to be dynamically removed from a running CP system.

support level 1 Dynamic removal of reconfigurable memory is supported. 20210408April 8, 2021
7.2 VM66271 Dynamic Memory Downgrade CP.LIMIT.MEMORY.RECONFIG

This variable indicates the current limitation on how much storage can be designated as reconfigurable. Reconfigurable memory may only be defined if there is already 4 GB of memory designated as permanent.

decimal integer 50 Value indicates the maximum percentage of a system's real memory can be reconfigured.
0 = No reconfigurable memory.
50 = 50% of memory is designated as reconfigurable.
20210408April 8, 2021
7.2 VM66173 Dynamic Memory Downgrade CP.LIMIT.MEMORY.RECONFIG

This variable indicates the current limitation on how much storage can be designated as reconfigurable. Reconfigurable memory may only be defined if there is already 4 GB of memory designated as permanent.

decimal integer 0 VM66173 introduces the new function variable. The variable value is initially fenced at 0 which means no reconfigurable memory. APAR VM66271 will remove the fence and allow the user to set the reconfigurable memory value up to 50. 20210408April 8, 2021
7.2 VM66420 EDEVICE Optional LUN Specification CP.FUNCTION.EDEVICE.DEFINITION

This variable indicates enhancements to the SET EDEVICE command or the EDEVICE system configuration statement.

support level 1 The LUN operand on the SET EDEVICE command and the EDEVICE system config statement is optional after the first path has been established. 20201212December 12, 2020
7.2 VM66433 FlashCopy Preserve Mirror Support CP.FUNCTION.COPYSERVICES.FC_PRESERVE_MIRROR

This variable indicates the presence of Preserve Mirror support for z/VM FlashCopy commands.

support level 1 FlashCopy commands have the "PRESERVemirror" operand to be used to avoid PPRC suspend conditions when the target of a FlashCopy is also a PPRC Primary device. FlashCopy now also allows target devices to be Global Mirror Primary devices. 20200914September 14, 2020
7.2 VM66173 Four TB Main Memory Support CP.LIMIT.MEMORY.REAL_TOTAL

This variable indicates the limitation on the maximum real memory supported for a z/VM system. The variable is a decimal integer value of terabytes of real memory. The amount of memory supported per guest or on a second level z/VM system may be different. See CP Planning and Administration for more details.

Positive decimal integer 4 Variable value indicates that 4 TB is the maximum real memory supported for a z/VM system. 20210408April 8, 2021
7.2 VM66421 1-END HyperPAV Minidisk Support CP.FUNCTION.DASD.HYPERPAV_1_END

This variable indicates new Parallel Access Volume (PAV) function.

support level 1 Support for 1-END HyperPAV Minidisks is available. 20201212December 12, 2020
7.2 VM66431 Improve I/O Time for Dump Processing CP.FUNCTION.DUMP.SPEEDUP

This variable indicates the presence of functionality which reduces the elapsed time required to write CP dumps.

support level 1 z/VM exploits the use of zHPF I/O to reduce the I/O elapsed time for writing hard abend and snap dumps. 20200915September 15, 2020
7.2 VM66201 z/XC Architecture Support CP.FUNCTION.ZXC

This variable indicates the presence of support for z/XC architecture mode, that is, the ability for XC virtual machines to exploit z/Architecture instruction set and capabilities concurrentlly with VM Data Spaces.

support level 1 z/XC architecture mode is available for XC virtual machines. 20200915September 15, 2020

 

 

Data type indicates that the variable is associated with support level. A variable value of one indicates the initial support. Each successively higher value represents an additional enhancement in the area described by the variable.