$IPQBK Back to Index page
Control Block Contents 
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.

  $IPQBK Prolog Top of page
 DESCRIPTION: Relocation mapping for HCPIPQBK
 DSECT      : $IPQBK
 FUNCTION   : LGRIPQBK describes those fields of the IPQBK 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.
 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 HCPIPQBK 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.
  $IPQBK Control Block Content Top of page

 $IPQBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure $IPQBK Relocation mapping for HCPIPQBK 00000001 $IPQ_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 $IPQ_HDRL Header length (in bytes) 0002 2 Signed 2 $IPQ_BITL Length of mapped bits (in bytes) 0004 4 Signed 4 * Reserved for future use 00000008 $IPQ_HDLN *-$IPQBK Length of header (bytes) Bit map: Contains the IPQBK flags that are subject to relocation. These bits are defined sequentially, regardless of how they are defined in HCPIPQBK. 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 $IPQ_BITS (0) Bit map area 0008 8 Bitstring 1 $IPQ0 1... .... $IPQRELRG X'80' $IPQRELRG IPQF0 .1.. .... $IPQABSRG X'40' $IPQABSRG IPQF0 ..1. .... $IPQGSSC X'20' $IPQGSSC IPQF0 00000001 $IPQ_BLEN *-$IPQ_BITS Length of bit map area Data: Contains all HCPIPQBK 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 $IPQ_DATA (0) Start of data map 0009 9 Bitstring 1 $IPQRQLO Requested low range value 000A 10 Bitstring 1 $IPQRQHI Requested high range value 000B 11 Bitstring 1 $IPQEFLO Effective low range value 000C 12 Bitstring 1 $IPQEFHI Effective high range value 000D 13 Bitstring 1 $IPQQULO Queueing Calculation range LO value 000E 14 Bitstring 1 $IPQQUHI Queueing Calculation range HI value 000F 15 Bitstring 4 $IPQDSKIP Count of times that a DASD I/O request was outprioritized by another virtual machine's I/O. Fields copied from non-IPQBK control blocks 0013 19 Bitstring 1 $IPQCPQH Source system's SYSIOPQH 0014 20 Bitstring 1 $IPQCPLO Source system's SYSIOPLO 0015 21 Bitstring 1 $IPQCPHI Source system's SYSIOPHI 00000016 $IPQ_LEN *-$IPQBK Total length, in bytes 00000003 $IPQ_SZ ($IPQ_LEN+7)/8 Size in doublewords
  $IPQBK Storage Layout Top of page
*** $IPQBK - Relocation mapping for HCPIPQBK
*     +-------------+-------------+---------------------------+
*   0 | $IPQ_HDRL   | $IPQ_BITL   |///////////////////////////|
*     +------+------+------+------+------+------+------+------+
*     +------+------+------+------+------+------+------+------+
*  10 |    -$IPQDSKIP      |:QCPQH|:QCPLO|:QCPHI| 16
*     +--------------------+------+------+------+
*** $IPQBK - Relocation mapping for HCPIPQBK
  $IPQBK Cross Reference Top of page
Symbol         Dspl Value
-------------- ---- -----
$IPQ_BITL      0002
$IPQ_BITS      0008
$IPQ_BLEN      0008 00000001
$IPQ_DATA      0009
$IPQ_HDLN      0004 00000008
$IPQ_HDRL      0000
$IPQ_LEN       0015 00000016
$IPQ_SZ        0015 00000003
$IPQ_VER       0000 00000001
$IPQABSRG      0008 40
$IPQCPHI       0015
$IPQCPLO       0014
$IPQCPQH       0013
$IPQDSKIP      000F
$IPQEFHI       000C
$IPQEFLO       000B
$IPQGSSC       0008 20
$IPQQUHI       000E
$IPQQULO       000D
$IPQRELRG      0008 80
$IPQRQHI       000A
$IPQRQLO       0009
$IPQ0          0008
This information is based on z/VM 6.3.0 Last updated on 22 May 2013 at 13:56:35 EDT.
Copyright IBM Corporation, 1990, 2013