$RTVBK | Back to Index page

| Prolog Control Block Contents $RTVBK 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.

$RTVBK Prolog | Top of page

     NAME       : LGRRTVBK
     DESCRIPTION: Relocation mapping for HCPRTVBK
     DSECT      : $RTVBK
     FUNCTION   : LGRRTVBK describes those fields of the RTVBK 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 HCPRTVBK 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.

$RTVBK Control Block Content | Top of page

     $RTVBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      $RTVBK         Relocation mapping for HCPRTVBK
              00000001       $RTV_VER       1 Mapping version number
    0000    0 Signed       2 $RTV_HDRL      Header length (in bytes)
    0002    2 Signed       2 $RTV_BITL      Length of mapped bits (in bytes)
    0004    4 Signed       4 *              Reserved for future use
              00000008       $RTV_HDLN      *-$RTVBK Length of header (bytes)
          Bit map: Contains the RTVBK flags that are subject to
                   relocation. These bits are defined sequentially,
                   regardless of how they are defined in HCPRTVBK.
                   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 $RTV_BITS (0)  Bit map area
              00000000       $RTV_BLEN      *-$RTV_BITS Length of bit map
                                            area
          Data:    Contains all HCPRTVBK 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 $RTV_DATA (0)  Start of data map
    0008    8 Bitstring    2 $RTVALLOC      Number of RETRIEVE buffers
                                            alloc'd
    000A   10 Bitstring    2 $RTVBFREQ      Number of RETRIEVE buffers
                                            requested
    000C   12 Bitstring    2 $RTVDFCNT      Number of RETRIEVE PF keys
                                            defined
    000E   14 Bitstring    2 $RTVBFCNT      Number of RETRIEVE buffers so far
    0010   16 Bitstring    2 $RTVLSRTV      Last retrieved entry
              00000012       $RTV_LEN       *-$RTVBK Total fixed length, in
                                            bytes
              00000003       $RTV_SZ        ($RTV_LEN+7)/8 Size in
                                            doublewords
          The $RTVGSDBK field is repeated (RTVBFCNT) times
    0012   18 Bitstring    4 $RTVGSDBK (0)  -> RDO offsets to GSDBKs

$RTVBK Storage Layout | Top of page

    *** $RTVBK - Relocation mapping for HCPRTVBK
    *
    *     +-------------+-------------+---------------------------+
    *   0 | $RTV_HDRL   | $RTV_BITL   |///////////////////////////|
    *     +-------------+-------------+-------------+-------------+
    *   8 | $RTVALLOC   | $RTVBFREQ   | $RTVDFCNT   | $RTVBFCNT   |
    *     +-------------+-------------+-------------+-------------+
    *  10 | $RTVLSRTV   |
    *     +-------------+
    *
    *** $RTVBK - Relocation mapping for HCPRTVBK

$RTVBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    $RTV_BITL      0002
    $RTV_BITS      0008
    $RTV_BLEN      0008 00000000
    $RTV_DATA      0008
    $RTV_HDLN      0004 00000008
    $RTV_HDRL      0000
    $RTV_LEN       0010 00000012
    $RTV_SZ        0010 00000003
    $RTV_VER       0000 00000001
    $RTVALLOC      0008
    $RTVBFCNT      000E
    $RTVBFREQ      000A
    $RTVDFCNT      000C
    $RTVGSDBK      0012
    $RTVLSRTV      0010

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