Programming Interface Information: The Monitor Records are intended Programming Interfaces that allow the customer to write programs to obtain services of z/VM.

#### MRIODHPF

Prolog
Control Block Contents
Cross Reference

#### MRIODHPF Prolog

     DSECT NAME - IODHPF
     FUNCTION - This record indicates a High Performance FICON (HPF)
                feature change.
     LOCATED BY -
               Through the Monitor Control Area
     REFERENCED CONTROL BLOCKS -
            MRRECHDR    Monitor Record Header
     NAME - MRIODHPF
     DESCRIPTIVE NAME - Monitor Event Record
                        Domain 6 - I/O Domain
                        Record 32 - HPF Feature Change
     DESCRIPTION - Indicates an HPF Feature Change
     NOTES:
         The SSID (Subsystem ID) is a unique value that distinguishes
         a logical control unit from any other in a configuration.
         This value can be obtained from a Q DASD DETAILS command
         executed against one of the device's on the control unit.
         An LSS (Logical Subsystem) is a logical control unit
         within a physical control unit.  The LSS number is only
         unique within the physical control unit and not unit
         across control units.  Currently there is no query command
         that presents this inforamtion.

#### MRIODHPF Control Block Contents

    Offsets
    Dec  Hex  Type        Len  Name (Dim)             Description

       0   0  Structure    40  IODHPF                 Start of monitor record
       0   0  Character     0  IODHPF_MRHDR           Record header. See MRRECHDR
                                                      for details.
       0   0  Character    20  MRHDR
       0   0  Unsigned      2  MRHDRLEN
       2   2  Unsigned      2  MRHDRZER
       4   4  Unsigned      1  MRHDRDM
       5   5  Unsigned      1  *
       6   6  Unsigned      2  MRHDRRC
       8   8  Character     8  MRHDRTOD
      16  10  Character     4  *
      20  14  Character     0  MRHDR_END
      20  14  Unsigned      2  IODHPF_CUIDSSID        Subsystem ID (SSID)
      22  16  Unsigned      1  IODHPF_CUIFCXP_OLD     Old HPF Feature Bits
      23  17  Unsigned      1  IODHPF_CUIFCXP_NEW     New HPF Feature Bits
      24  18  Character     8  IODHPF_CUIFCXPE_OLD    Old HPF Feature Bits
      32  20  Character     8  IODHPF_CUIFCXPE_NEW    New HPF Feature Bits
      40  28  Character     0  IODHPF_END

#### MRIODHPF Cross Reference

                          Hex           Hex
    Name                  Offset Length Value

    IODHPF                     0     40
    IODHPF_CUIDSSID           14      2
    IODHPF_CUIFCXP_NEW        17      1
    IODHPF_CUIFCXP_OLD        16      1
    IODHPF_CUIFCXPE_NEW       20      8
    IODHPF_CUIFCXPE_OLD       18      8
    IODHPF_END                28      0
    IODHPF_MRHDR               0      0
    MRHDR                      0     20
    MRHDR_END                 14      0
    MRHDRDM                    4      1
    MRHDRLEN                   0      2
    MRHDRRC                    6      2
    MRHDRTOD                   8      8
    MRHDRZER                   2      2

    This information is
    based on z/VM V7R2.0.

    Last updated on 09 August 2020 at 16:03:51.

    Copyright IBM Corporation, 1990, 2020