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


  $SSHBK Prolog Top of page
 
 NAME       : LGRSSHBK
 DESCRIPTION: Relocation mapping for the SSHBK array
              members of HCPSSHBK
 DSECT      : $SSHBK
 FUNCTION   : LGRSSHBK describes those fields of the SSHBK 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 HCPSSHBK 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.
 
 
  $SSHBK Control Block Content Top of page
 

 $SSHBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure $SSHBK Relocation mapping for the SSHBK array 00000001 $SSH_VER 1 Mapping version number 0000 0 Signed 2 $SSH_HDRL Header length (in bytes) 0002 2 Signed 2 $SSH_BITL Length of mapped bits (in bytes) 0004 4 Signed 2 * Reserved for future use 0006 6 Signed 2 $SSH_PUC Processor type for this RDO 00000008 $SSH_HDLN *-$SSHBK Length of header (bytes) Bit map: Contains the SSHBK flags that are subject to relocation. These bits are defined sequentially, regardless of how they are defined in HCPSSHBK. 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 $SSH_BITS (0) Bit map area 0008 8 Bitstring 1 $SSH0 1... .... $SSHLIMH X'80' $SSHLIMH SSHFLG1 .1.. .... $SSHNMSHA X'40' $SSHNMSHA SSHFLG1 ..1. .... $SSHMXSHA X'20' $SSHMXSHA SSHFLG1 ...1 .... $SSHVINV X'10' $SSHVINV SSHFLG2 00000001 $SSH_BLEN *-$SSH_BITS Length of bit map area Data: Contains all HCPSSHBK 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 $SSH_DATA (0) Start of data map 0009 9 Bitstring 4 $SSHNEXT -> RDO offset to next $SSHBK 000D 13 Bitstring 4 $SSHRELSH Rel share setting for this CPU type 0011 17 Bitstring 4 $SSHABSSH Abs share setting for this CPU type 0015 21 Bitstring 4 $SSHMXSHR Max share setting for this CPU type 00000019 $SSH_LEN *-$SSHBK Total length, in bytes 00000004 $SSH_SZ ($SSH_LEN+7)/8 Size in doublewords
 
 
  $SSHBK Storage Layout Top of page
 
          
*** $SSHBK - Relocation mapping for the SSHBK array
*
*     +-------------+-------------+-------------+-------------+
*   0 | $SSH_HDRL   | $SSH_BITL   |/////////////|  $SSH_PUC   |
*     +------+------+-------------+------+------+-------------+
*   8 |$SSH0 |         $SSHNEXT          |    $SSHRELSH-      |
*     +------+---------------------------+--------------------+
*  10 |-(00D)|        $SSHABSSH          |    $SSHMXSHR-      |
*     +------+---------------------------+--------------------+
*  18 |-(015)| 19
*     +------+
*
*** $SSHBK - Relocation mapping for the SSHBK array
 
 
  $SSHBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
$SSH_BITL      0002
$SSH_BITS      0008
$SSH_BLEN      0008 00000001
$SSH_DATA      0009
$SSH_HDLN      0006 00000008
$SSH_HDRL      0000
$SSH_LEN       0015 00000019
$SSH_PUC       0006
$SSH_SZ        0015 00000004
$SSH_VER       0000 00000001
$SSHABSSH      0011
$SSHLIMH       0008 80
$SSHMXSHA      0008 20
$SSHMXSHR      0015
$SSHNEXT       0009
$SSHNMSHA      0008 40
$SSHRELSH      000D
$SSHVINV       0008 10
$SSH0          0008
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:59:01 EDT.
Copyright IBM Corporation, 1990, 2022