$MCVBK | Back to Index page

| Prolog Control Block Contents $MCVBK 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.

$MCVBK Prolog | Top of page

     NAME       : LGRMCVBK
     DESCRIPTION: Relocation mapping for HCPMCVBK
     DSECT      : $MCVBK
     FUNCTION   : LGRMCVBK describes those fields of the MCVBK 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 HCPMCVBK 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.

$MCVBK Control Block Content | Top of page

     $MCVBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      $MCVBK         Relocation mapping for HCPMCVBK
              00000001       $MCV_VER       1 Mapping version number
    0000    0 Signed       2 $MCV_HDRL      Header length (in bytes)
    0002    2 Signed       2 $MCV_BITL      Length of mapped bits (in bytes)
    0004    4 Signed       4 *              Reserved for future use
              00000008       $MCV_HDLN      *-$MCVBK Length of header (bytes)
          Bit map: Contains the MCVBK flags that are subject to
                   relocation. These bits are defined sequentially,
                   regardless of how they are defined in HCPMCVBK.
                   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 $MCV_BITS (0)  Bit map area
    0008    8 Bitstring    1 $MCV0
              1... ....      $MCVABEND      X'80' $MCVABEND MCVFLAG
              .1.. ....      $MCVCKSTP      X'40' $MCVCKSTP MCVFLAG
              ..1. ....      $MCVTMOUT      X'20' $MCVTMOUT MCVFLAG
              ...1 ....      $MCVCUTOF      X'10' $MCVCUTOF MCVFLAG
              .... 1...      $MCVCMPLT      X'08' $MCVCMPLT MCVFLAG
              .... .1..      $MCVQWRK       X'04' $MCVQWRK MCVFLAG
              .... ..1.      $MCVSTGFX      X'02' $MCVSTGFX MCVFLAG
              .... ...1      $MCVSTGLS      X'01' $MCVSTGLS MCVFLAG
    0009    9 Bitstring    1 $MCV1
              1... ....      $MCVFSIE       X'80' $MCVFSIE MCVFLAG2
              .1.. ....      $MCVHRUN       X'40' $MCVHRUN MCVFLAG2
              ..1. ....      $MCVUNRUN      X'20' $MCVUNRUN MCVFLAG2
              ...1 ....      $MCVSCS        X'10' $MCVSCS MCVFLAG2
              00000002       $MCV_BLEN      *-$MCV_BITS Length of bit map
                                            area
          Data:    Contains all HCPMCVBK 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.
    000A   10 Bitstring    1 $MCV_DATA (0)  Start of data map
    000A   10 Bitstring    8 $MCVMCIC       Machine check interruption code
    0012   18 Bitstring    4 $MCVVMDBK      CPUAD of running VMDBK
    0016   22 Bitstring    4 $MCVFSAUS      0: MCVFSAUS �= MCVVMDBK 1:
                                            MCVFSAUS = MCVVMDBK
    001A   26 Bitstring    4 $MCVNEXT       Next MCVBK
    001E   30 Bitstring    4 $MCVEDMDC      Machine check external damage
                                            code
    0022   34 Bitstring    8 $MCVGFAD       Guest absolute failing address
              0000002A       $MCV_LEN       *-$MCVBK Total length, in bytes
              00000006       $MCV_SZ        ($MCV_LEN+7)/8 Size in
                                            doublewords

$MCVBK Storage Layout | Top of page

    *** $MCVBK - Relocation mapping for HCPMCVBK
    *
    *     +-------------+-------------+---------------------------+
    *   0 | $MCV_HDRL   | $MCV_BITL   |///////////////////////////|
    *     +------+------+-------------+---------------------------+
    *   8 |$MCV0 |$MCV1 |               $MCVMCIC-                 |
    *     +------+------+---------------------------+-------------+
    *  10 |   -(00A)    |        $MCVVMDBK          | $MCVFSAUS-  |
    *     +-------------+---------------------------+-------------+
    *  18 |   -(016)    |         $MCVNEXT          | $MCVEDMDC-  |
    *     +-------------+---------------------------+-------------+
    *  20 |   -(01E)    |               $MCVGFAD-                 |
    *     +-------------+-----------------------------------------+
    *  28 |   -(022)    | 2A
    *     +-------------+
    *
    *** $MCVBK - Relocation mapping for HCPMCVBK

$MCVBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    $MCV_BITL      0002
    $MCV_BITS      0008
    $MCV_BLEN      0009 00000002
    $MCV_DATA      000A
    $MCV_HDLN      0004 00000008
    $MCV_HDRL      0000
    $MCV_LEN       0022 0000002A
    $MCV_SZ        0022 00000006
    $MCV_VER       0000 00000001
    $MCVABEND      0008 80
    $MCVCKSTP      0008 40
    $MCVCMPLT      0008 08
    $MCVCUTOF      0008 10
    $MCVEDMDC      001E
    $MCVFSAUS      0016
    $MCVFSIE       0009 80
    $MCVGFAD       0022
    $MCVHRUN       0009 40
    $MCVMCIC       000A
    $MCVNEXT       001A
    $MCVQWRK       0008 04
    $MCVSCS        0009 10
    $MCVSTGFX      0008 02
    $MCVSTGLS      0008 01
    $MCVTMOUT      0008 20
    $MCVUNRUN      0009 20
    $MCVVMDBK      0012
    $MCV0          0008
    $MCV1          0009

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:32:07 EDT.
Copyright IBM Corporation, 1990, 2020