z/VM New Function Variable List
Last Updated: 5 August 2022
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.
To receive an email when this page has been updated, sign up through the z/VM file change notification page. For details on the APAR, click the APAR number. For more information on upcoming or recently delivered function for z/VM, view the z/VM Continuous Delivery News page.
| Release | APAR | APAR name | Environment variable name | Data type | Variable value | Variable value description | Last updated |
|---|---|---|---|---|---|---|---|
| 7.3 | N/A | Display Mnemonics of Instructions Not Supported by CP TRACE |
CP.FUNCTION.TRACE.MNEMONICS Indicates that mnemonics for valid opcodes will be included in TRACE and DISPLAY output. |
support level | 1 | Display Mnemonics of Instructions Not Supported by CP TRACE is installed on this system. | August 5, 2022 |
| 7.2 | VM66450 | Non Full-Pack Minidisk HPF I/O Support |
CP.FUNCTION.DASD.MINIDISK.HPF.PHASE Defines the level of guest High Performance FICON opcode support. |
support level | 1 | The value of the variable associated with this function is the support level, known as the "phase". | April 1, 2022 |
| 7.2 | VM66522 | Hipersockets Bridge Connectivity Loss on Shutdown |
CP.FUNCTION.VSWITCH.SHUTDOWN This variable indicates SHUTDOWN will terminate the network connections for the uplinks associated with Global VSwitches and any Bridge Ports. |
support level | 1 | Network termination support at SHUTDOWN is installed on this system. | April 1, 2022 |
| 7.3 | N/A | ESM Control of DEFINE MDISK Command |
CP.ESM.CONTROL.DEFINE.MDISK This variable indicates the presence of Control Program support for an External Security Manager to control the DEFINE MDISK command. |
support level | 1 | CP Support of ESM Control of the DEFINE MDISK command is installed. | April 5, 2022 |
| 7.3 | N/A | SSI 8-Member Clusters |
CP.LIMIT.SSI.MEMBERS The value of this variable represents the maximum number ofAmembers in a Single 7 System Image (SSI) cluster supported by this level of CP. |
decimal integer | 8 | The variable is a decimal integer with a value of 8. This means that the level of CP code on the system supports up to eight members in an SSI cluster when it is properly enabled. Prior to the existence of this variable, four members were supported. | April 5, 2022 |
| 7.3 | N/A | NVMe EDEVICE Support |
CP.FUNCTION.EDEVICE.NVME This variable indicates whether NVMe EDEVICE support is installed. |
support level | 1 | Version 1 of NVMe EDEVICE support is installed. | April 5, 2022 |
| 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. | October 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. | August 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. | August 12, 2021 |
| 7.2 | VM66534 | 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. | May 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. | April 20, 2021 |
| 7.2 | VM66560 | 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. | January 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. | April 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. | October 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 multiple processors. This work previously was limited to running on only the master processor. This ability reduces the response time of large VARY ON RDEV commands. | December 7, 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. | April 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. |
April 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. | April 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. | December 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. | September 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. | April 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. | December 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. | September 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. | September 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.