$IPQBK | Back to Index page

| Prolog Control Block Contents $IPQBK 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.

$IPQBK Prolog | Top of page

     NAME       : LGRIPQBK
     DESCRIPTION: Relocation mapping for HCPIPQBK
     DSECT      : $IPQBK
     FUNCTION   : LGRIPQBK describes those fields of the IPQBK 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.
     CREATED BY : HCPRLIIF - IPQBK Formatter for LGR
     DELETED BY : HCPRLDRL - Release storage associated with an RDP
     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 HCPIPQBK 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.

$IPQBK Control Block Content | Top of page

     $IPQBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      $IPQBK         Relocation mapping for HCPIPQBK
              00000001       $IPQ_VER       1 Mapping version number for this
                                            DSECT. Version is independent of
                                            the CP level and need only be
                                            changed when this DSECT is
                                            changed. The convention is to
                                            increment by 1.
    0000    0 Signed       2 $IPQ_HDRL      Header length (in bytes)
    0002    2 Signed       2 $IPQ_BITL      Length of mapped bits (in bytes)
    0004    4 Signed       4 *              Reserved for future use
              00000008       $IPQ_HDLN      *-$IPQBK Length of header (bytes)
          Bit map: Contains the IPQBK flags that are subject to
                   relocation. These bits are defined sequentially,
                   regardless of how they are defined in HCPIPQBK.
                   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 $IPQ_BITS (0)  Bit map area
    0008    8 Bitstring    1 $IPQ0
              1... ....      $IPQRELRG      X'80' $IPQRELRG IPQF0
              .1.. ....      $IPQABSRG      X'40' $IPQABSRG IPQF0
              ..1. ....      $IPQGSSC       X'20' $IPQGSSC IPQF0
              00000001       $IPQ_BLEN      *-$IPQ_BITS Length of bit map
                                            area
          Data:    Contains all HCPIPQBK 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.
    0009    9 Bitstring    1 $IPQ_DATA (0)  Start of data map
    0009    9 Bitstring    1 $IPQRQLO       Requested low range value
    000A   10 Bitstring    1 $IPQRQHI       Requested high range value
    000B   11 Bitstring    1 $IPQEFLO       Effective low range value
    000C   12 Bitstring    1 $IPQEFHI       Effective high range value
    000D   13 Bitstring    1 $IPQQULO       Queueing Calculation range LO
                                            value
    000E   14 Bitstring    1 $IPQQUHI       Queueing Calculation range HI
                                            value
    000F   15 Bitstring    4 $IPQDSKIP      Count of times that a DASD I/O
                                            request was outprioritized by
                                            another virtual machine's I/O.
                  Fields copied from non-IPQBK control blocks
    0013   19 Bitstring    1 $IPQCPQH       Source system's SYSIOPQH
    0014   20 Bitstring    1 $IPQCPLO       Source system's SYSIOPLO
    0015   21 Bitstring    1 $IPQCPHI       Source system's SYSIOPHI
              00000016       $IPQ_LEN       *-$IPQBK Total length, in bytes
              00000003       $IPQ_SZ        ($IPQ_LEN+7)/8 Size in
                                            doublewords

$IPQBK Storage Layout | Top of page

    *** $IPQBK - Relocation mapping for HCPIPQBK
    *
    *     +-------------+-------------+---------------------------+
    *   0 | $IPQ_HDRL   | $IPQ_BITL   |///////////////////////////|
    *     +------+------+------+------+------+------+------+------+
    *   8 |$IPQ0 |:QRQLO|:QRQHI|:QEFLO|:QEFHI|:QQULO|:QQUHI|(00F)-|
    *     +------+------+------+------+------+------+------+------+
    *  10 |    -$IPQDSKIP      |:QCPQH|:QCPLO|:QCPHI| 16
    *     +--------------------+------+------+------+
    *
    *** $IPQBK - Relocation mapping for HCPIPQBK

$IPQBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    $IPQ_BITL      0002
    $IPQ_BITS      0008
    $IPQ_BLEN      0008 00000001
    $IPQ_DATA      0009
    $IPQ_HDLN      0004 00000008
    $IPQ_HDRL      0000
    $IPQ_LEN       0015 00000016
    $IPQ_SZ        0015 00000003
    $IPQ_VER       0000 00000001
    $IPQABSRG      0008 40
    $IPQCPHI       0015
    $IPQCPLO       0014
    $IPQCPQH       0013
    $IPQDSKIP      000F
    $IPQEFHI       000C
    $IPQEFLO       000B
    $IPQGSSC       0008 20
    $IPQQUHI       000E
    $IPQQULO       000D
    $IPQRELRG      0008 80
    $IPQRQHI       000A
    $IPQRQLO       0009
    $IPQ0          0008

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:32:06 EDT.
Copyright IBM Corporation, 1990, 2020