Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
$MCVBK
Control Block Contents
$MCVBK DSECT
Cross Reference (Contains links to field and bit definitions)
$MCVBK Prolog
NAME : LGRMCVBK DESCRIPTION: Relocation mapping for HCPMCVBK DSECT : $MCVBK FUNCTION : LGRMCVBK describes those fields of the MCVBK 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 HCPMCVBK 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.
$MCVBK Control Block Content
$MCVBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure $MCVBK Relocation mapping for HCPMCVBK 00000001 $MCV_VER 1 Mapping version number 0000 0 Signed 2 $MCV_HDRL Header length (in bytes) 0002 2 Signed 2 $MCV_BITL Length of mapped bits (in bytes) 0004 4 Signed 4 * Reserved for future use 00000008 $MCV_HDLN *-$MCVBK Length of header (bytes) Bit map: Contains the MCVBK flags that are subject to relocation. These bits are defined sequentially, regardless of how they are defined in HCPMCVBK. 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 $MCV_BITS (0) Bit map area 0008 8 Bitstring 1 $MCV0 1... .... $MCVABEND X'80' $MCVABEND MCVFLAG .1.. .... $MCVCKSTP X'40' $MCVCKSTP MCVFLAG ..1. .... $MCVTMOUT X'20' $MCVTMOUT MCVFLAG ...1 .... $MCVCUTOF X'10' $MCVCUTOF MCVFLAG .... 1... $MCVCMPLT X'08' $MCVCMPLT MCVFLAG .... .1.. $MCVQWRK X'04' $MCVQWRK MCVFLAG .... ..1. $MCVSTGFX X'02' $MCVSTGFX MCVFLAG .... ...1 $MCVSTGLS X'01' $MCVSTGLS MCVFLAG 0009 9 Bitstring 1 $MCV1 1... .... $MCVFSIE X'80' $MCVFSIE MCVFLAG2 .1.. .... $MCVHRUN X'40' $MCVHRUN MCVFLAG2 ..1. .... $MCVUNRUN X'20' $MCVUNRUN MCVFLAG2 ...1 .... $MCVSCS X'10' $MCVSCS MCVFLAG2 00000002 $MCV_BLEN *-$MCV_BITS Length of bit map area Data: Contains all HCPMCVBK 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. 000A 10 Bitstring 1 $MCV_DATA (0) Start of data map 000A 10 Bitstring 8 $MCVMCIC Machine check interruption code 0012 18 Bitstring 4 $MCVVMDBK CPUAD of running VMDBK 0016 22 Bitstring 4 $MCVFSAUS 0: MCVFSAUS ¬= MCVVMDBK 1: MCVFSAUS = MCVVMDBK 001A 26 Bitstring 4 $MCVNEXT Next MCVBK 001E 30 Bitstring 4 $MCVEDMDC Machine check external damage code 0022 34 Bitstring 8 $MCVGFAD Guest absolute failing address 0000002A $MCV_LEN *-$MCVBK Total length, in bytes 00000006 $MCV_SZ ($MCV_LEN+7)/8 Size in doublewords
$MCVBK Storage Layout
*** $MCVBK - Relocation mapping for HCPMCVBK * * +-------------+-------------+---------------------------+ * 0 | $MCV_HDRL | $MCV_BITL |///////////////////////////| * +------+------+-------------+---------------------------+ * 8 |$MCV0 |$MCV1 | $MCVMCIC- | * +------+------+---------------------------+-------------+ * 10 | -(00A) | $MCVVMDBK | $MCVFSAUS- | * +-------------+---------------------------+-------------+ * 18 | -(016) | $MCVNEXT | $MCVEDMDC- | * +-------------+---------------------------+-------------+ * 20 | -(01E) | $MCVGFAD- | * +-------------+-----------------------------------------+ * 28 | -(022) | 2A * +-------------+ * *** $MCVBK - Relocation mapping for HCPMCVBK
$MCVBK Cross Reference
Symbol Dspl Value -------------- ---- ----- $MCV_BITL 0002 $MCV_BITS 0008 $MCV_BLEN 0009 00000002 $MCV_DATA 000A $MCV_HDLN 0004 00000008 $MCV_HDRL 0000 $MCV_LEN 0022 0000002A $MCV_SZ 0022 00000006 $MCV_VER 0000 00000001 $MCVABEND 0008 80 $MCVCKSTP 0008 40 $MCVCMPLT 0008 08 $MCVCUTOF 0008 10 $MCVEDMDC 001E $MCVFSAUS 0016 $MCVFSIE 0009 80 $MCVGFAD 0022 $MCVHRUN 0009 40 $MCVMCIC 000A $MCVNEXT 001A $MCVQWRK 0008 04 $MCVSCS 0009 10 $MCVSTGFX 0008 02 $MCVSTGLS 0008 01 $MCVTMOUT 0008 20 $MCVUNRUN 0009 20 $MCVVMDBK 0012 $MCV0 0008 $MCV1 0009
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