$SFXBK Back to Index page
 
Prolog 
Control Block Contents 
   $SFXBK 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.


  $SFXBK Prolog Top of page
 
 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 Top of page
 

 $SFXBK DSECT Top of page
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 Top of page
 
          
*** $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 Top of page
 
 
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
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:58:59 EDT.
Copyright IBM Corporation, 1990, 2022