$IPRML | Back to Index page

| Prolog Control Block Contents $IPRML DSECT Storage Layout Cross Reference (Contains links to field and bit definitions) |
Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

$IPRML Prolog | Top of page

     NAME       : LGRIPRML
     DESCRIPTION: Relocation mapping for IPARML
     DSECT      : $IPRML
     FUNCTION   : LGRIPRML describes those fields of the IPRML that
                  will be migrated to the destination system during
                  guest relocation.
     LOCATED BY : This is a mapping of the RDODATA area within the
                  RDOBK during guest relocation.
     RELOCATION CONSIDERATIONS : This control block is used during live guest
                  relocation.  It is used to relocate a control block
                  defined in a corresponding HCP COPY file.  Any
                  fields or bits defined in IPARML COPY which are
                  required on the destination system must be defined
                  here, and code must be added to migrate the field
                  or bit during a relocation.

$IPRML Control Block Content | Top of page

     $IPRML DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      $IPRML         Relocation mapping for IPARML
              00000001       $PRM_VER       1 Mapping version number
    0000    0 Signed       2 $PRM_HDRL      Header length (in bytes)
    0002    2 Signed       2 $PRM_BITL      Length of mapped bits (in bytes)
    0004    4 Signed       4 *              Reserved for future use
              00000008       $PRM_HDLN      *-$IPRML Length of header (bytes)
          Bit map: Contains the IPRML flags that are subject to
                   relocation. These bits are defined sequentially,
                   regardless of how they are defined in IPARML.
                   This yields a consistent mapping that ensures
                   compatibility when a guest is relocated between
                   systems at differing service levels.
                   Names in the comments column indicate the control
                   block byte which contains the flag. This name is
                   subject to change if the flag definition changes.
             ====> NEVER change bits which already exist here.
             ====> NEVER change the order of bits in this section.
             ====> ALWAYS add new bits at the end of this section,
                   together with new flag bytes as required.
    0008    8 Signed       2 $PRM_BITS (0)  Bit map area
              00000000       $PRM_BLEN      *-$PRM_BITS Length of bit map
                                            area
          Data:    Contains all IPARML data that is subject to
                   relocation, except for flag bits, which are
                   handled separately.
                   All fields are defined as XLnn to avoid alignment
                   warnings and to pack the data efficiently.
             ====> NEVER change fields which already exist here.
             ====> NEVER change the order of fields in this section.
             ====> ALWAYS add new fields at the end of this section.
                   together with new flag bytes as required.
    0008    8 Bitstring    1 $PRM_DATA (0)  Start of data map
    0008    8 Bitstring    2 $IPPATHID      Path ID
    000A   10 Bitstring    1 $IPFLAGS1      Flags
    000B   11 Bitstring    1 $IPCPSYS       CP system service identifier
    000C   12 Bitstring    2 $IPMSGLIM      Message limit
    000E   14 Bitstring    4 $IPNEXT        -> RDO offset to next $IPRML
              00000012       $PRM_LEN       *-$IPRML Total length, in bytes
              00000003       $PRM_SZ        ($PRM_LEN+7)/8 Size in
                                            doublewords

$IPRML Storage Layout | Top of page

    *** $IPRML - Relocation mapping for IPARML
    *
    *     +-------------+-------------+---------------------------+
    *   0 | $PRM_HDRL   | $PRM_BITL   |///////////////////////////|
    *     +-------------+------+------+-------------+-------------+
    *   8 | $IPPATHID   |(00A) |:CPSYS| $IPMSGLIM   |  $IPNEXT-   |
    *     +-------------+------+------+-------------+-------------+
    *  10 |   -(00E)    | 12
    *     +-------------+
    *
    *** $IPRML - Relocation mapping for IPARML

$IPRML Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    $IPCPSYS       000B
    $IPFLAGS1      000A
    $IPMSGLIM      000C
    $IPNEXT        000E
    $IPPATHID      0008
    $PRM_BITL      0002
    $PRM_BITS      0008
    $PRM_BLEN      0008 00000000
    $PRM_DATA      0008
    $PRM_HDLN      0004 00000008
    $PRM_HDRL      0000
    $PRM_LEN       000E 00000012
    $PRM_SZ        000E 00000003
    $PRM_VER       0000 00000001

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:32:04 EDT.
Copyright IBM Corporation, 1990, 2020