$PPFBK | Back to Index page

| Prolog Control Block Contents $PPFBK 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.

$PPFBK Prolog | Top of page

     NAME       : LGRPPFBK
     DESCRIPTION: Relocation mapping for HCPPPFBK
     DSECT      : $PPFBK
     FUNCTION   : LGRPPFBK describes those fields of the PPFBK 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 HCPPPFBK 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.

$PPFBK Control Block Content | Top of page

     $PPFBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      $PPFBK         Relocation mapping for HCPPPFBK
              00000001       $PPF_VER       1 Mapping version number
    0000    0 Signed       2 $PPF_HDRL      Header length (in bytes)
    0002    2 Signed       2 $PPF_BITL      Length of mapped bits (in bytes)
    0004    4 Signed       4 *              Reserved for future use
              00000008       $PPF_HDLN      *-$PPFBK Length of header (bytes)
          Bit map: Contains the PPFBK flags that are subject to
                   relocation. These bits are defined sequentially,
                   regardless of how they are defined in HCPPPFBK.
                   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 $PPF_BITS (0)  Bit map area
    0008    8 Bitstring    1 $PPF0
              1... ....      $PPFSCHIN      X'80' $PPFSCHIN PPFSTAT
              .1.. ....      $PPFCANCL      X'40' $PPFCANCL PPFSTAT
              ..1. ....      $PPFREFLT      X'20' $PPFREFLT PPFSTAT
              ...1 ....      $PPFRESLD      X'10' $PPFRESLD PPFSTAT
              .... 1...      $PPFSCHCO      X'08' $PPFSCHCO PPFSTAT
              00000001       $PPF_BLEN      *-$PPF_BITS Length of bit map
                                            area
          Data:    Contains all HCPPPFBK 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 $PPF_DATA (0)  Start of data map
    0009    9 Bitstring    4 $PPFPNT        -> RDO offset to next $PPFBK
    000D   13 Bitstring    4 $PPFALET       Effective host ALET
    0011   17 Bitstring    8 $PPFGADDR      Host virtual page fault addr
    0019   25 Bitstring   16 $PPFGPSW       Guest PSW at time of page fault
    0029   41 Bitstring    8 $PPFGTOKEN     User-defined page fault token
    0031   49 Bitstring    8 $PPFGBADDR     User base register contents
    0039   57 Bitstring    4 $PPFVMDBK      Address of page-faulting VMDBK
    003D   61 Bitstring    1 $PPFAREG       Access register of page fault
              0000003E       $PPF_LEN       *-$PPFBK Total length, in bytes
              00000008       $PPF_SZ        ($PPF_LEN+7)/8 Size in
                                            doublewords

$PPFBK Storage Layout | Top of page

    *** $PPFBK - Relocation mapping for HCPPPFBK
    *
    *     +-------------+-------------+---------------------------+
    *   0 | $PPF_HDRL   | $PPF_BITL   |///////////////////////////|
    *     +------+------+-------------+------+--------------------+
    *   8 |$PPF0 |         $PPFPNT           |     $PPFALET-      |
    *     +------+---------------------------+--------------------+
    *  10 |-(00D)|                  $PPFGADDR-                    |
    *     +------+------------------------------------------------+
    *  18 |-(011)|                                                |
    *     +------+                                                |
    *     |                       $PPFGPSW                        |
    *     |      +------------------------------------------------+
    *     |      |                  $PPFGTOKEN-                   |
    *     +------+------------------------------------------------+
    *  30 |-(029)|                  $PPFGBADDR-                   |
    *     +------+---------------------------+------+-------------+
    *  38 |-(031)|        $PPFVMDBK          |:FAREG| 3E
    *     +------+---------------------------+------+
    *
    *** $PPFBK - Relocation mapping for HCPPPFBK

$PPFBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    $PPF_BITL      0002
    $PPF_BITS      0008
    $PPF_BLEN      0008 00000001
    $PPF_DATA      0009
    $PPF_HDLN      0004 00000008
    $PPF_HDRL      0000
    $PPF_LEN       003D 0000003E
    $PPF_SZ        003D 00000008
    $PPF_VER       0000 00000001
    $PPFALET       000D
    $PPFAREG       003D
    $PPFCANCL      0008 40
    $PPFGADDR      0011
    $PPFGBADDR     0031
    $PPFGPSW       0019
    $PPFGTOKEN     0029
    $PPFPNT        0009
    $PPFREFLT      0008 20
    $PPFRESLD      0008 10
    $PPFSCHCO      0008 08
    $PPFSCHIN      0008 80
    $PPFVMDBK      0039
    $PPF0          0008

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:32:10 EDT.
Copyright IBM Corporation, 1990, 2020