$PSGBK | Back to Index page

| Prolog Control Block Contents $PSGBK 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.

$PSGBK Prolog | Top of page

     NAME       : LGRPSGBK
     DESCRIPTION: Relocation mapping for HCPPSGBK
     DSECT      : $PSGBK
     FUNCTION   : LGRPSGBK describes those fields of the PSGBK 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 HCPPSGBK 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.

$PSGBK Control Block Content | Top of page

     $PSGBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      $PSGBK         Relocation mapping for HCPPSGBK
              00000001       $PSG_VER       1 Mapping version number
    0000    0 Signed       2 $PSG_HDRL      Header length (in bytes)
    0002    2 Signed       2 $PSG_BITL      Length of mapped bits (in bytes)
    0004    4 Signed       4 *              Reserved for future use
              00000008       $PSG_HDLN      *-$PSGBK Length of header (bytes)
          Bit map: Contains the PSGBK flags that are subject to
                   relocation. These bits are defined sequentially,
                   regardless of how they are defined in HCPPSGBK.
                   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 $PSG_BITS (0)  Bit map area
    0008    8 Bitstring    1 $PSG0
              1... ....      $PSGINPXI      X'80' $PSGINPXI PSGFLAG
              00000001       $PSG_BLEN      *-$PSG_BITS Length of bit map
                                            area
          Data:    Contains all HCPPSGBK 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.
    0009    9 Bitstring    1 $PSG_DATA (0)  Start of data map
    0009    9 Bitstring    4 $PSGCOUNT      Count of supplementary GIDs
    000D   13 Bitstring    4 $PSGPXICT      Count of referring PXIBKs
    0011   17 Bitstring    4 $PSGSGIDS      -> RDO offset to list of SGIDs
              00000015       $PSG_LEN       *-$PSGBK Total length, in bytes
              00000003       $PSG_SZ        ($PSG_LEN+7)/8 Size in
                                            doublewords

$PSGBK Storage Layout | Top of page

    *** $PSGBK - Relocation mapping for HCPPSGBK
    *
    *     +-------------+-------------+---------------------------+
    *   0 | $PSG_HDRL   | $PSG_BITL   |///////////////////////////|
    *     +------+------+-------------+------+--------------------+
    *   8 |$PSG0 |        $PSGCOUNT          |    $PSGPXICT-      |
    *     +------+---------------------------+--------------------+
    *  10 |-(00D)|        $PSGSGIDS          | 15
    *     +------+---------------------------+
    *
    *** $PSGBK - Relocation mapping for HCPPSGBK

$PSGBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    $PSG_BITL      0002
    $PSG_BITS      0008
    $PSG_BLEN      0008 00000001
    $PSG_DATA      0009
    $PSG_HDLN      0004 00000008
    $PSG_HDRL      0000
    $PSG_LEN       0011 00000015
    $PSG_SZ        0011 00000003
    $PSG_VER       0000 00000001
    $PSGCOUNT      0009
    $PSGINPXI      0008 80
    $PSGPXICT      000D
    $PSGSGIDS      0011
    $PSG0          0008

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:32:11 EDT.
Copyright IBM Corporation, 1990, 2020