$PXIBK | Back to Index page

| Prolog Control Block Contents $PXIBK 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.

$PXIBK Prolog | Top of page

     NAME       : LGRPXIBK
     DESCRIPTION: Relocation mapping for HCPPXIBK
     DSECT      : $PXIBK
     FUNCTION   : LGRPXIBK describes those fields of the PXIBK 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 HCPPXIBK 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.

$PXIBK Control Block Content | Top of page

     $PXIBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      $PXIBK         Relocation mapping for HCPPXIBK
              00000001       $PXI_VER       1 Mapping version number
    0000    0 Signed       2 $PXI_HDRL      Header length (in bytes)
    0002    2 Signed       2 $PXI_BITL      Length of mapped bits (in bytes)
    0004    4 Signed       2 *              Reserved for future use
    0006    6 Bitstring    1 $PXI_FLGS      General flag byte
              1... ....      $PXI_SHAR      X'80' $PXI_SHAR Guest using
                                            shared creation PXIBK
    0007    7 Bitstring    1 *              Reserved for future use
              00000008       $PXI_HDLN      *-$PXIBK Length of header (bytes)
          Bit map: Contains the PXIBK flags that are subject to
                   relocation. These bits are defined sequentially,
                   regardless of how they are defined in HCPPXIBK.
                   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 $PXI_BITS (0)  Bit map area
    0008    8 Bitstring    1 $PXI0
              1... ....      $PXICREAT      X'80' $PXICREAT PXIFLAG
              .1.. ....      $PXIWPSG       X'40' $PXIWPSG PXIFLAG
              00000001       $PXI_BLEN      *-$PXI_BITS Length of bit map
                                            area
          Data:    Contains all HCPPXIBK 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 $PXI_DATA (0)  Start of data map
          These fields are present only when $PXI_SHAR = 0
    0009    9 Bitstring    4 $PXIPSGBK      -> RDO offset to PSGBK
    000D   13 Bitstring    4 $PXI_PSGC      PSGCOUNT from PSGBK
    0011   17 Bitstring   12 $PXIUIDS       All UIDs
    001D   29 Bitstring   12 $PXIGIDS       All GIDs
              00000029       $PXI_LEN       *-$PXIBK Total length, in bytes
              00000006       $PXI_SZ        ($PXI_LEN+7)/8 Size in
                                            doublewords

$PXIBK Storage Layout | Top of page

    *** $PXIBK - Relocation mapping for HCPPXIBK
    *
    *     +-------------+-------------+-------------+------+------+
    *   0 | $PXI_HDRL   | $PXI_BITL   |/////////////|(006) |//////|
    *     +------+------+-------------+------+------+------+------+
    *   8 |$PXI0 |        $PXIPSGBK          |    $PXI_PSGC-      |
    *     +------+---------------------------+--------------------+
    *  10 |-(00D)|                   $PXIUIDS                     |
    *     +------+                           +--------------------+
    *  18 |                                  |                    |
    *     +----------------------------------+                    |
    *     |                       $PXIGIDS                        |
    *     |      +------------------------------------------------+
    *     |      | 29
    *     +------+
    *
    *** $PXIBK - Relocation mapping for HCPPXIBK

$PXIBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    $PXI_BITL      0002
    $PXI_BITS      0008
    $PXI_BLEN      0008 00000001
    $PXI_DATA      0009
    $PXI_FLGS      0006
    $PXI_HDLN      0007 00000008
    $PXI_HDRL      0000
    $PXI_LEN       001D 00000029
    $PXI_PSGC      000D
    $PXI_SHAR      0006 80
    $PXI_SZ        001D 00000006
    $PXI_VER       0000 00000001
    $PXICREAT      0008 80
    $PXIGIDS       001D
    $PXIPSGBK      0009
    $PXIUIDS       0011
    $PXIWPSG       0008 40
    $PXI0          0008

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:32:12 EDT.
Copyright IBM Corporation, 1990, 2020