$MSVBK | Back to Index page

| Prolog Control Block Contents $MSVBK 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.

$MSVBK Prolog | Top of page

     NAME       : LGRMSVBK
     DESCRIPTION: Relocation mapping for HCPMSVBK
     DSECT      : $MSVBK
     FUNCTION   : LGRMSVBK describes those fields of the MSVBK 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 HCPMSVBK 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.

$MSVBK Control Block Content | Top of page

     $MSVBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      $MSVBK         Relocation mapping for HCPMSVBK
              00000001       $MSV_VER       1 Mapping version number
    0000    0 Signed       2 $MSV_HDRL      Header length (in bytes)
    0002    2 Signed       2 $MSV_BITL      Length of mapped bits (in bytes)
    0004    4 Signed       4 *              Reserved for future use
              00000008       $MSV_HDLN      *-$MSVBK Length of header (bytes)
          Bit map: Contains the MSVBK flags that are subject to
                   relocation. These bits are defined sequentially,
                   regardless of how they are defined in HCPMSVBK.
                   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.
          SPECIAL NOTES      :
          The three flag bytes MSVCFL, MSVPFL, and MSVAFL, all have
          the same bits defined. Since the bit names here need to be
          unique, they have been slightly renamed, as follows:
           MSVXnnnn becomes $MSXCxxxx for MSVCFL
                    becomes $MSVPxxxx for MSVPFL
                    becomes $MSVAxxxx for MSVAFL
          This also means these bits will be encoded using the
          extended form of the MAPBIT macro.
    0008    8 Signed       2 $MSV_BITS (0)  Bit map area
          NOTES      : MSVBK is somewhat different from other control blocks
                in that it was designed with relocation in mind. Thus
                we do not relocate the flag bits discretely, so there
                are no definitions in this section.
              00000000       $MSV_BLEN      *-$MSV_BITS Length of bit map
                                            area
          Data:    Contains all HCPMSVBK 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 $MSV_DATA (0)  Start of data map
    0008    8 Bitstring    4 $MSVNEXT       -> RDO offset of chained
                                            $MSVBK
    000C   12 Bitstring    2 $MSVDEV#       Device number
    000E   14 Bitstring    1 $MSVSTAT       MSVBK status flag
    000F   15 Bitstring    1 $MSVMACPR      Current MACProtect setting
    0010   16 Bitstring    2 $MSVROWN       SSI Slot ID of owning system
    0012   18 Bitstring    6 $MSVCMAC       Current MAC address
    0018   24 Bitstring    1 $MSVCFL        CURRENT MAC Services Flag
    0019   25 Bitstring    6 $MSVPMAC       Pending MAC address
    001F   31 Bitstring    1 $MSVPFL        Pending MAC Services Flag
    0020   32 Bitstring    6 $MSVAMAC       Adapter MAC address field
    0026   38 Bitstring    1 $MSVAFL        Current MAC Services Flag
    0027   39 Bitstring    8 $MSVUSER       8 Byte EBCDIC of Owning User
              0000002F       $MSV_LEN       *-$MSVBK Total length, in bytes
              00000006       $MSV_SZ        ($MSV_LEN+7)/8 Size in
                                            doublewords

$MSVBK Storage Layout | Top of page

    *** $MSVBK - Relocation mapping for HCPMSVBK
    *
    *     +-------------+-------------+---------------------------+
    *   0 | $MSV_HDRL   | $MSV_BITL   |///////////////////////////|
    *     +-------------+-------------+-------------+------+------+
    *   8 |         $MSVNEXT          |  $MSVDEV#   |:VSTAT|(00F) |
    *     +-------------+-------------+-------------+------+------+
    *  10 |  $MSVROWN   |                $MSVCMAC                 |
    *     +------+------+----------------------------------+------+
    *  18 |:VCFL |                $MSVPMAC                 |:VPFL |
    *     +------+----------------------------------+------+------+
    *  20 |                $MSVAMAC                 |:VAFL |(027)-|
    *     +-----------------------------------------+------+------+
    *  28 |                   -$MSVUSER                    | 2F
    *     +------------------------------------------------+
    *
    *** $MSVBK - Relocation mapping for HCPMSVBK

$MSVBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    $MSV_BITL      0002
    $MSV_BITS      0008
    $MSV_BLEN      0008 00000000
    $MSV_DATA      0008
    $MSV_HDLN      0004 00000008
    $MSV_HDRL      0000
    $MSV_LEN       0027 0000002F
    $MSV_SZ        0027 00000006
    $MSV_VER       0000 00000001
    $MSVAFL        0026
    $MSVAMAC       0020
    $MSVCFL        0018
    $MSVCMAC       0012
    $MSVDEV#       000C
    $MSVMACPR      000F
    $MSVNEXT       0008
    $MSVPFL        001F
    $MSVPMAC       0019
    $MSVROWN       0010
    $MSVSTAT       000E
    $MSVUSER       0027

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