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


  $CHCBK Prolog Top of page
 
 NAME       : LGRCHCBK
 DESCRIPTION: Relocation mapping for HCPCHCBK
 DSECT      : $CHCBK
 FUNCTION   : LGRCHCBK describes those fields of the CHCBK 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.
 CREATED BY : HCPRLICF - CHCBK Formatter for LGR
 DELETED BY : HCPRLDRL - Release storage associated with an RDP
 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 HCPCHCBK 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.
 
 
  $CHCBK Control Block Content Top of page
 

 $CHCBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure $CHCBK Relocation mapping for HCPCHCBK 00000001 $CHC_VER 1 Mapping version number for this DSECT. Version is independent of the CP level and need only be changed when this DSECT is changed. The convention is to increment by 1. 0000 0 Signed 2 $CHC_HDRL Header length (in bytes) 0002 2 Signed 2 $CHC_BITL Length of mapped bits (in bytes) 0004 4 Signed 4 * Reserved for future use 00000008 $CHC_HDLN *-$CHCBK Length of header (bytes) Bit map: Contains the CHCBK flags that are subject to relocation. These bits are defined sequentially, regardless of how they are defined in HCPCHCBK. 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 $CHC_BITS (0) Bit map area 0008 8 Bitstring 1 $CHC0 1... .... $CHCMSM X'80' $CHCMSM CHCHFLAG .1.. .... $CHCTIM X'40' $CHCTIM CHCHFLAG ..1. .... $CHCRWCC1 X'20' $CHCRWCC1 CHCSFLAG ...1 .... $CHCEMW X'10' $CHCEMW CHCSFLAG .... 1... $CHCIPR X'08' $CHCIPR CHCSFLAG 00000001 $CHC_BLEN *-$CHC_BITS Length of bit map area Data: Contains all HCPCHCBK 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 $CHC_DATA (0) Start of data map 0009 9 Bitstring 1 $CHCKEY Key of user measurement block 000A 10 Bitstring 4 $CHCGMBOH zArch: high order MBO word 000E 14 Bitstring 4 $CHCGMBOL zArch: Low order MBO word 0012 18 Bitstring 4 $CHCIORW Pointer to chain of CRWBK's 0016 22 Bitstring 4 $CHCSALIM Set Address Limit Value 001A 26 Bitstring 4 $CHCMCV Pointer to chain of MCVBK's 001E 30 Bitstring 1 $CHCPGBY0 Non zero means CHCPGID is set 001F 31 Bitstring 11 $CHCPGID Guest Path Group ID 002A 42 Bitstring 256 $CHCCHPID Virtual chpid table 0000012A $CHC_LEN *-$CHCBK Total length, in bytes 00000026 $CHC_SZ ($CHC_LEN+7)/8 Size in doublewords
 
 
  $CHCBK Storage Layout Top of page
 
          
*** $CHCBK - Relocation mapping for HCPCHCBK
*
*     +-------------+-------------+---------------------------+
*   0 | $CHC_HDRL   | $CHC_BITL   |///////////////////////////|
*     +------+------+-------------+-------------+-------------+
*   8 |$CHC0 |:CKEY |        $CHCGMBOH          | $CHCGMBOL-  |
*     +------+------+---------------------------+-------------+
*  10 |   -(00E)    |         $CHCIORW          | $CHCSALIM-  |
*     +-------------+---------------------------+------+------+
*  18 |   -(016)    |         $CHCMCV           |(01E) |      |
*     +-------------+---------------------------+------+      |
*     |                       $CHCPGID                        |
*     |             +-----------------------------------------+
*     |             |                                         |
*     +-------------+                                         |
*  30 |                                                       |
*     =                      $CHCCHPID                        =
*     |             +-----------------------------------------+
*     |             | 12A
*     +-------------+
*
*** $CHCBK - Relocation mapping for HCPCHCBK
 
 
  $CHCBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
$CHC_BITL      0002
$CHC_BITS      0008
$CHC_BLEN      0008 00000001
$CHC_DATA      0009
$CHC_HDLN      0004 00000008
$CHC_HDRL      0000
$CHC_LEN       002A 0000012A
$CHC_SZ        002A 00000026
$CHC_VER       0000 00000001
$CHCCHPID      002A
$CHCEMW        0008 10
$CHCGMBOH      000A
$CHCGMBOL      000E
$CHCIORW       0012
$CHCIPR        0008 08
$CHCKEY        0009
$CHCMCV        001A
$CHCMSM        0008 80
$CHCPGBY0      001E
$CHCPGID       001F
$CHCRWCC1      0008 20
$CHCSALIM      0016
$CHCTIM        0008 40
$CHC0          0008
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:58:34 EDT.
Copyright IBM Corporation, 1990, 2022