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VM66891: Z/VM 7.4 CP: FEATURE PACK - FEATURE 04 FIX 00

A fix is available

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You can track all active APARs for this component.

 

APAR status

  • Closed as new function.

Error description

  • This is the APAR for z/VM 7.4 CP Feature Pack 04.  As such, it
    contains the following new functions:
    
    1. Remove Paging Pack without an IPL (Active Drain)
    2. Control-only access for Guest Crypto Domains
    3. CRYPTO APVIRT NONE
    4. Collection of I/O fixes, command RAS improvements
    5. FICON RAS  Flapping Links
    6. FICON RAS  Path Not Operational Error Messaging
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users who intend to:                     *
    *                  - Allow Control-only Access for Guest APDED *
    *                    Crypto Domains                            *
    *                  - Prevent Crypto Domains from being         *
    *                    allocated for APVIRT use                  *
    *                  - Remove Paging Packs without an IPL        *
    *                  - Enable FICON Flapping Links Recovery      *
    *                  - Access more detailed Host Access          *
    *                    information                               *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    ****************************************************************
    * RECOMMENDATION: APPLY PTF                                    *
    ****************************************************************
    With the applicable PTFs applied, z/VM will provide support for
    the following:
    
    Control-only Access for Guest Crypto Domains
     - Allows APDED virtual machines to be given control-only access
       to crypto domains in addition to usage+control access as is
       currently permitted.  The new control-only designation is
       made per domain and applies to the domain across all APs
       assigned to the virtual machine.  irrespective of whether
       usage+control access has been granted to a user.  Providing
       control-only access for guest crypto domains enables virtual
       machines to submit key management requests to crypto domains
       for which they do not have usage+control access.
    
    CRYPTO APVIRT NONE Configuration Option
     - A new operand on the CRYPTO APVIRT system configuration
       statement is added to allow a z/VM system to IPL without
       reserving resources for the shared APVIRT pool.  When a
       CRYPTO APVIRT NONE statement exists in the SYSTEM CONFIG
       file, z/VM will not attempt to assign crypto resources to the
       shared pool.  This allows all crypto resources to be
       available for dedicated use.
    
    Remove Paging Pack without an IPL
     - Enables a system administrator to remove a PAGE volume on a
       running z/VM system without requiring an IPL.  This will
       allow moving PAGE volumes to a new storage server without
       requiring a planned z/VM outage.
    
    FICON RAS - Flapping Links Facility Support
     - Enables the flapping links hardware facility which causes
       the hardware to vary offline CHPIDs which are exibiting
       unstable signals.  These paths would otherwise produce
       consistent error conditions on I/O requests for related
       devices which would then have to be actively recovered by
       the system.
     - After the hardware for the affected CHPID is serviced, the
       CHPID can be varied back online to be brought back into use.
    
    
    FICON RAS - Expanded Host Access Information
     - Query DASD DETAILS output in the HOST ACCESS information
       section is updated to include the System and SSI name if
       available.
     - This information is registered with the associated device
       during device initialization by systems with this support.
    

Problem conclusion

Temporary fix

Comments

  • The following publications were updated for this support:
    CP Planning and Administration
    CP Commands and Utilities Reference
    CP Messages and Codes
    

APAR Information

  • APAR number

    VM66891

  • Reported component name

    VM CP CP

  • Reported component ID

    568411202

  • Reported release

    740

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    YesSpecatt / New Function / Xsystem

  • Submitted date

    2025-10-17

  • Closed date

    2026-05-01

  • Last modified date

    2026-05-15

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    UM90597

Modules/Macros

  • ALLOC    ATTACH   CBDMCONF CBDMNDSP CBDMOD   CBITABLE CPLOAD
    CPOWNED  CRYPTAPV CRYPTO   DASD     DISK     HCPACPBK HCPAPDBK
    HCPARD   HCPASA2V HCPCBI   HCPCPD   HCPCPE   HCPCQA   HCPCQB
    HCPCRPBK HCPCSA   HCPDIR   HCPDPM   HCPDRA   HCPDVMD  HCPHPV
    HCPIIO   HCPIOD   HCPIOX   HCPKAB   HCPKAC   HCPKAD   HCPKAE
    HCPKAI   HCPKAP   HCPKAQ   HCPKAR   HCPKAT   HCPKAU   HCPKAV
    HCPKFC   HCPKFL   HCPKFR   HCPLGN   HCPLPN   HCPMC    HCPMDLAT
    HCPMES   HCPMESB  HCPMOM   HCPMONEQ HCPMOT   HCPMXD   HCPMXG
    HCPMXRBK HCPOM1   HCPOM2   HCPPAH   HCPPAK   HCPPFC   HCPPGT
    HCPPGU   HCPPTE   HCPQDA   HCPQDE   HCPQDV   HCPQTA   HCPRDA
    HCPRDEV  HCPRLP   HCPRP    HCPRSM   HCPRSMBK HCPSALBK HCPSCFBK
    HCPSDU   HCPSHOBK HCPSYS   HCPSYSCM HCPUDP   HCPVEXBK HCPVPGBK
    HCPZPP   HCPZSC   HCP1283I HCP1284I HCP1713E HCP1720I HCP1723I
    HCP1728E HCP1730E HCP1737E HCP1738E HCP1748E HCP1749E HCP6891I
    HCP6893I INSTPIPE IPL      MRMTRMEM MRSTOASP MRSTORAE MRSTORAS
    MRSTORSG PAGING   PATH     PCIFUNCT TAPES    VIRTCRYP 7VMCPR40
    

Publications Referenced
SC24626874GC24627074SC24627174GC24628674GC24629474

Fix information

  • Fixed component name

    VM CP CP

  • Fixed component ID

    568411202

Applicable component levels

  • R740 PSY UM90597

       UP26/05/05 I 1000

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

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Document Information

Modified date:
16 May 2026