$SFXBK

Prolog  

Control Block Contents  
   $SFXBK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

$SFXBK Prolog

 NAME       : LGRSFXBK
 DESCRIPTION: Relocation mapping for HCPSFXBK
 DSECT      : $SFXBK
 FUNCTION   : LGRSFXBK describes those fields of the SFXBK 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 HCPSFXBK 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.

$SFXBK Control Block Content

$SFXBK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      $SFXBK         Relocation mapping for HCPSFXBK
          00000001       $SFX_VER       1 Mapping version number
0000    0 Signed       2 $SFX_HDRL      Header length (in bytes)
0002    2 Signed       2 $SFX_BITL      Length of mapped bits (in bytes)
0004    4 Signed       4 *              Reserved for future use
          00000008       $SFX_HDLN      *-$SFXBK Length of header (bytes)
      Bit map: Contains the SFXBK flags that are subject to
               relocation. These bits are defined sequentially,
               regardless of how they are defined in HCPSFXBK.
               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 $SFX_BITS (0)  Bit map area There are no flag
                                        bytes in HCPSFXBK. While there
                                        *are* flag bits defined with the
                                        description to VMDSFIP1. The
                                        definition and description in
                                        HCPSFXBK could use some
                                        clarification.
          00000000       $SFX_BLEN      *-$SFX_BITS Length of bit map
                                        area
      Data:    Contains all HCPSFXBK 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 $SFX_DATA (0)  Start of data map
0008    8 Bitstring    4 $SFXINEXT      -> RDO offset to next $SFXBK
000C   12 Bitstring    4 $SFXICMSK      Interrupt codes and mask values
      Notes      : $SFXLDCEF can only occur for a guest which is a host for
            logical devices. However, such guests are not permitted to
            migrate, so all references here to xxxLDCEF are for
            completeness only (as well as being potentially useful in
            the future, should the migration restriction be lifted for
            such guests).
0010   16 Bitstring    1 $SFXICALL      ID of routine to be called
          .... ....      $SFXNONE       0 $SFXNONE No interrupt reflector
                                        defined
          .... ...1      $SFXLDCEF      1 $SFXLDCEF HCPLDCEF
          .... ..1.      $SFXPCMXI      2 $SFXPCMXI HCPPCMXI
          .... ..11      $SFXSFINT      3 $SFXSFINT HCPSFINT
          .... .1..      $SFXVEXCL      4 $SFXVEXCL HCPVEXCL
          .... .1.1      $SFXVIPIL      5 $SFXVIPIL HCPVIPIL
          .... .11.      $SFXVIPIX      6 $SFXVIPIX HCPVIPIX The contents
                                        of $SFXIPARM are determined by
                                        the value of $SFXICALL:
                                        +-----------+********************
                                        **********------+ | $SFXICALL |
                                        Contents of $SFXIPARM |
                                        +-----------+********************
                                        **********------+ | $SFXNONE | 0
                                        | | $SFXLDCEF | SFXIPARM | |
                                        $SFXPCMXI | SFXIPARM | |
                                        $SFXSFINT | RDO offset to
                                        self-defining parms | | $SFXVEXCL
                                        | RDO offset to a $GSDBK | |
                                        $SFXVIPIL | RDO offset to a
                                        $PPFBK | | $SFXVIPIX | RDO offset
                                        to a $PPFBK |
                                        +-----------+********************
                                        **********------+
0011   17 Bitstring    4 $SFXIPARM      0, SFXIPARM, or RDO offset
          00000015       $SFX_LEN       *-$SFXBK Total length, in bytes
          00000003       $SFX_SZ        ($SFX_LEN+7)/8 Size in
                                        doublewords

$SFXBK Storage Layout

          
*** $SFXBK - Relocation mapping for HCPSFXBK
*
*     +-------------+-------------+---------------------------+
*   0 | $SFX_HDRL   | $SFX_BITL   |///////////////////////////|
*     +-------------+-------------+---------------------------+
*   8 |        $SFXINEXT          |        $SFXICMSK          |
*     +------+--------------------+------+--------------------+
*  10 |(010) |        $SFXIPARM          | 15
*     +------+---------------------------+
*
*** $SFXBK - Relocation mapping for HCPSFXBK

$SFXBK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
$SFX_BITL      0002
$SFX_BITS      0008
$SFX_BLEN      0008 00000000
$SFX_DATA      0008
$SFX_HDLN      0004 00000008
$SFX_HDRL      0000
$SFX_LEN       0011 00000015
$SFX_SZ        0011 00000003
$SFX_VER       0000 00000001
$SFXICALL      0010
$SFXICMSK      000C
$SFXINEXT      0008
$SFXIPARM      0011
$SFXLDCEF      0010 01
$SFXNONE       0010 00
$SFXPCMXI      0010 02
$SFXSFINT      0010 03
$SFXVEXCL      0010 04
$SFXVIPIL      0010 05
$SFXVIPIX      0010 06