VOPBK | Back to Index page

| Prolog Control Block Contents VOPBK 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.

VOPBK Prolog | Top of page

     NAME       : HCPVOPBK
     DESCRIPTION: HCPVOP simulation fetch/store work area
     DSECT      : VOPBK
     FUNCTION   : Work area used by HCPVOP simulation fetch/store
                  routines.
     LOCATED BY : VMDVOPBK field of the VMDBK
     CREATED BY : HCPBVMBK when a user logs on or when a new vCPU
                  is defined
     DELETED BY : HCPUSPFF when a user logs off or when a vCPU is
                  detached
     SERIALIZED : VMDBK dispatch lock (VMDBK local area)
     RELOCATION CONSIDERATIONS : None
     COMMENTS   :

VOPBK Control Block Content | Top of page

     VOPBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      VOPBK          HCPVOP simulation fetch/store work area
    0000    0 Signed       4 VOPFLAG (0)
    0000    0 Bitstring    1 VOPFLAG0       Flags for HCPVOP processing:
              1... ....      VOPBUFSP       X'80' VOPBUFSP Caller has
                                            specified the .buffer to use.
              .1.. ....      VOPRWERR       X'40' VOPRWERR Indicate register
                                            wrap error
              ..1. ....      VOPSTLOG       X'20' VOPSTLOG Indicate request
                                            store into guest logical address.
              ...1 ....      VOPFONLY       X'10' VOPFONLY Indicate this
                                            address space is read only.
              .... 1...      VOPNXTMV       X'08' VOPNXTMV More than one
                                            section of data will be moved.
              .... .1..      VOPGOTBF       X'04' VOPGOTBF HCPVOP got free
                                            storage for the output data
                                            buffer. The address of the buffer
                                            is in VOPBUFAD.
              .... ...1      VOPNRLLK       X'01' VOPNRLLK Skip releasing
                                            IPTE lock
    0001    1 Bitstring    1 VOPFLAG1       Additional HCPVOP flags:
              1... ....      VOPGAM64       X'80' VOPGAM64 HCPVOP may need to
                                            execute in 64-bit addressing mode
                                            to access zArch mode guest
                                            storage as host logical storage.
              .1.. ....      VOPAMO64       X'40' VOPAMO64 HCPVOP is
                                            currently executing in 64-bit
                                            addressing mode to handle a V=V
                                            zArch mode guest guest.
              ..1. ....      VOPEXTIN       X'20' VOPEXTIN Executing inside
                                            FETCH/STORE exit
              ...1 ....      VOPWAS64       X'10' VOPWAS64 Flag to indicate
                                            whether we were 1, or were not 0,
                                            in 64 bit addressing mode before
                                            changing states
              .... 1...      VOPFETCH       X'08' VOPFETCH VOP was called to
                                            perform a fetch
              .... .1..      VOPSTORE       X'04' VOPSTORE VOP was called to
                                            perform a store
              .... ..1.      VOPIEP         X'02' VOPIEP VOP was called to
                                            perform an I-fetch with IEP
                                            installed and enabled
    0002    2 Bitstring    1 VOPPURGE       Purge operation bits
    0003    3 Bitstring    1 VOPAR          AR number
    0004    4 Signed       4 *              Reserved for future IBM use
    0008    8 Dbl-Word     8 VOPGWRAP       Mask for address wrap (64-bit)
    0010   16 Signed       4 VOPAGSIZ       Page size - 1 (2047/4095)
    0014   20 Address      4 VOPASUBR       Subroutine for translation of
                                            guest logical (virtual, real, or
                                            absolute) to host logical
    0018   24 Address      4 VOPBUFAD       Pointer to CP operand buffer
    001C   28 Address      4 VOPGRHL        Subroutine for translation of
                                            guest real or absolute to host
                                            logical
    0020   32 Signed       4 VOPIPLCK       Address of IPTE lock (zero if
                                            relocation not active)
    0024   36 Signed       4 VOPARMS (0)    Input parameters
    0024   36 Signed       2 VOPLEN         Length of data to be fetched/
                                            stored in bits 0-11.
    0024   36 Bitstring    1 *              Bits 0-7 of length.
    0025   37 Bitstring    1 VOPINFL0       Bits 8-11 of length and 4 bits
                                            for flags.
              .... 1...      VOPEXPRM       X'08' Additional parameters are
                                            defined in the VNPBK.
              .... .1..      VOPALETS       X'04' Guest-use ALET specified.
              .... ..1.      VOPASITS       X'02' I-ASIT specified.
              .... ...1      VOPMCRCD       X'01' Return an MCRECORD.
    0026   38 Bitstring    1 VOPINFLG       Input flags (byte 2 of VOPARMS)
              1... ....      VOPLAP         X'80' VOPLAP Apply low address
                                            protection
              1... ....      VOPLAPFO       X'80' VOPLAPFO Apply low address
                                            protection
              .1.. ....      VOPPROT        X'40' VOPPROT Apply key
                                            protection
              ..1. ....      VOPGA64R       X'20' VOPGA64R Bits 18-19 of
                                            VOPARMS = b'10' For entry points
                                            which accept a guest operand
                                            address input in R1, input guest
                                            64-bit address is provided in
                                            64-bit wide input R1; for all
                                            entry points which deal with
                                            guest operands, HCPVOP internally
                                            represents the 64-bit guest
                                            operand address in 64-bit R1.
              ...1 ....      VOPGA64S       X'10' VOPGA64S Bits 18-19 of
                                            VOPARMS = b'01' For entry points
                                            which accept a guest operand
                                            address input in R1, input guest
                                            64-bit address is provided in a
                                            64-bit host real storage area
                                            pointed to by the 31-bit host
                                            real address in 32-bit input R1;
                                            for all entry points which deal
                                            with guest operands, HCPVOP
                                            internally represents the 64-bit
                                            guest operand address in a 64-bit
                                            host real storage area pointed to
                                            by the 31-bit host real address
                                            in 31-bit R1. Notes : If neither
                                            VOPGA64R or VOPGA64S are on, then
                                            HCPVOP internally represents the
                                            31 bit guest operand address in
                                            32 bit R1, and, for all entry
                                            points which accept a guest
                                            operand address in R1, the R1
                                            input is a 31-bit guest operand
                                            address in 32-bit input R1. Notes
                                            : For entry points which accept a
                                            guest operand address input in
                                            R1, VOPGA64R and VOPGA64S are
                                            used to map both bits 18-19 of
                                            the input R0 parameter and also
                                            the copy of the input R0
                                            parameter saved in the VOPARMS /
                                            VOPINFLG fields. All entry points
                                            which deal with guest operands
                                            but do NOT accept a guest opeand
                                            address input in R1 have bits
                                            18-19 of the input R0 parameter
                                            undefined, and use the VOPERAND
                                            subroutine to determine the guest
                                            operand address. For these entry
                                            points, VOPGA64R and VOPGA64S are
                                            used both to MODIFY the local
                                            copy of the input R0 parameter
                                            (to indicate how VOPERAND has
                                            represented the guest operand
                                            address) and to map the copy of
                                            input R0 parameter (as modified
                                            by VOPERAND) saved in the VOPARMS
                                            / VOPINFLG fields. Needless to
                                            say, this is all much more
                                            confusing than it ought to be,
                                            but further cleanup is left for
                                            later, and should include an
                                            overhaul of HCPVINOP - HCPVOP
                                            interfaces.
              .... 1...      VOPREGW        X'08' VOPREGW Wrap register to R0
                                            when RX=15
              .... .11.      VOPWRP64       X'06' VOPWRP64 64-bit wrap rule
              .... .1..      VOPWRPD        X'04' VOPWRPD Diagnose wrap rule
              .... ..1.      VOPWRP31       X'02' VOPWRP31 31-bit wrap rule
              .... ...1      VOPREALA       X'01' VOPREALA Input is guest
                                            real address
              .... ...1      VOPGSTAR       X'01' VOPGSTAR Input is guest AR
                                            number
    0027   39 Bitstring    1 VOPCODE        The forth byte of input parm.
                                            First 4 bit is align code next 4
                                            bit is operand code or AR number
                                            or address space mode
    0028   40 Dbl-Word     8 VOPASCE (0)    Address-Space-Control Element
                                            (ASCE), zArch guest
    0028   40 Signed       4 VOPASCEH       High half of ASCE, zArch guest
                                            Reserved, 390 guest
    002C   44 Signed       4 VOPASCEL (0)   Low half of ASCE, zArch guest
    002C   44 Bitstring    1 VOPASCB4       Byte 4 of ASCE, zArch guest
    002D   45 Bitstring    1 VOPASCB5       Byte 5 of ASCE, zArch guest
    002E   46 Bitstring    1 VOPASCB6       Byte 6 of ASCE, zArch guest
    002F   47 Bitstring    1 VOPASCB7       Byte 7 of ASCE, zArch guest
    0028   40 Signed       4 *              Reserved, 390 guest
    002C   44 Signed       4 VOPSTD (0)     Segment-Table Designation (STD),
                                            390 guest
    002C   44 Bitstring    1 VOPSTDB0       Byte 0 of STD, 390 guest
    002D   45 Bitstring    1 VOPSTDB1       Byte 1 of STD, 390 guest
    002E   46 Bitstring    1 VOPSTDB2       Byte 2 of STD, 390 guest
    002F   47 Bitstring    1 VOPSTDB3       Byte 3 of STD, 390 guest
    0030   48 Dbl-Word     8 VOPGADDR (0)   Input address (64-bit)
    0030   48 Signed       4 VOPHADDR       High half of large input address
    0034   52 Signed       4 VOPADDR        Low half (31-bit) input address
          Longer data moves can be handled in up to three sections.
          The host logical address for each section, as well as the
          length of each section, are saved in this small array with
          3 entries.  Each entry has a 64-bit host logical address
          field (VOPGHLAD), the right half of which is mapped as a
          31-bit host logical address field (VOPHLADR), and a length
          field (VOPHLLEN).  The same names are used for all three
          entries, the table is accessed using an index register
          containing a multiple of the entry length (VOPHLAEL).
    0038   56 Dbl-Word     8 VOPHLAEN (0)   A host logical address section
                                            entry
    0038   56 Dbl-Word     8 VOPGHLAD (0)   Host logical address of the first
                                            section (64-bit)
    0038   56 Signed       4 *              (high half of VOPGHVA1)
    003C   60 Address      4 VOPHLADR       Host logical address of the first
                                            section (31-bit)
    0040   64 Signed       4 VOPHLLEN       Length of the first section -1
    0044   68 Signed       4 *              reserved for IBM use
              00000010       VOPHLAEL       *-VOPHLAEN Length of one entry
    0048   72 Bitstring    1 * (32)         Space for two more entries
    0068  104 Dbl-Word     8 VOPIASIT       I-ASIT for the guest-absolute
                                            address space to be accessed.
    0070  112 Signed       4 VOPEXADR       Address of the extended parameter
                                            list, if one exists.
    0074  116 Signed       4 VOPEXFLG (0)   Flag field from the extended
                                            parameter list.
    0074  116 Bitstring    1 VOPEXFB0       Byte 0 of VOPEXFLG
              1... ....      VOPBAUTO       VNPBAUTO VOPBAUTO BUFADDR=AUTO
                                            was specified
              .1.. ....      VOPLNFLD       VNPLNFLD VOPLNFLD The LENFIELD
                                            operand was specified, and the
                                            length to fetch is found in the
                                            halfword whose displacement is in
                                            VOPLENFD.
              ..1. ....      VOPMXLEN       VNPMXLEN VOPMXLEN The MAXLEN
                                            operand was specified, and the
                                            maximum length to fetch is in
                                            VOPMAXLN.
    0075  117 Bitstring    1 VOPEXFB1       Byte 1 of VOPEXFLG
    0076  118 Bitstring    1 VOPEXFB2       Byte 2 of VOPEXFLG
    0077  119 Bitstring    1 VOPEXFB3       Byte 3 of VOPEXFLG
    0078  120 Signed       4 VOPLENFD       Displacement of the field from
                                            which to fetch the parameter list
                                            length.
    007C  124 Signed       4 VOPLUNIT       Units in which the length to
                                            fetch is expressed.
    0080  128 Address      2 VOPMAXLN       Maximum length to fetch, in DWs.
    0082  130 Signed       2 VOPLENTH       Length fetched from LENFIELD
    0084  132 Signed       4 *              reserved for IBM use
    0088  136 Dbl-Word     8 VOPPSW         Guest PSW (bits 0-64) HCPVOP only
                                            uses VOPPSW to save the bits in
                                            the beginning of the guest's PSW.
                                            It has no need for the
                                            instruction address. So, VOPPSW
                                            is large enough to save the
                                            entire PSW for a 390 mode guest
                                            or the first half of an zArch
                                            mode guest.
              00000090       VOPBKLEN       *-VOPBK Define the length of the
                                            DSECT
              00000012       VOPBKSIZ       (VOPBKLEN+7)/8 Size of VOPBK in
                                            doublewords

VOPBK Storage Layout | Top of page

    *** VOPBK - HCPVOP simulation fetch/store work area
    *
    *     +------+------+------+------+---------------------------+
    *   0 |:FLAG0|:FLAG1|:PURGE|VOPAR |///////////////////////////|
    *     +------+------+------+------+---------------------------+
    *   8 |                       VOPGWRAP                        |
    *     +---------------------------+---------------------------+
    *  10 |         VOPAGSIZ          |         VOPASUBR          |
    *     +---------------------------+---------------------------+
    *  18 |         VOPBUFAD          |         VOPGRHL           |
    *     +---------------------------+-------------+-------------+
    *  20 |         VOPIPLCK          |   VOPLEN    |/////////////|
    *     +---------------------------+-------------+/////////////|
    *     |///////////////////////////////////////////////////////|
    *     +---------------------------+---------------------------+
    *  30 |         VOPHADDR          |         VOPADDR           |
    *     +---------------------------+---------------------------+
    *  38 |///////////////////////////|         VOPHLADR          |
    *     +---------------------------+---------------------------+
    *  40 |         VOPHLLEN          |///////////////////////////|
    *     +---------------------------+---------------------------+
    *  48 |///////////////////////////////////////////////////////|
    *     =///////////////////////////////////////////////////////=
    *     |///////////////////////////////////////////////////////|
    *     +-------------------------------------------------------+
    *  68 |                       VOPIASIT                        |
    *     +---------------------------+------+------+------+------+
    *  70 |         VOPEXADR          |:EXFB0|:EXFB1|:EXFB2|:EXFB3|
    *     +---------------------------+------+------+------+------+
    *  78 |         VOPLENFD          |         VOPLUNIT          |
    *     +-------------+-------------+---------------------------+
    *  80 |  VOPMAXLN   |  VOPLENTH   |///////////////////////////|
    *     +-------------+-------------+---------------------------+
    *  88 |                        VOPPSW                         |
    *     +-------------------------------------------------------+
    *  90
    *
    *** VOPBK - HCPVOP simulation fetch/store work area

    *** Overlay for VOPLEN in VOPBK
    *
    *                                 +------+------+------+------+
    *  20 ...                      24 |//////|:INFL0|:INFLG|:CODE |
    *     +---------------------------+------+------+------+------+
    *  28 |         VOPASCEH          |:ASCB4|:ASCB5|:ASCB6|:ASCB7|
    *     +---------------------------+------+------+------+------+
    *  30
    *
    *** Overlay for VOPLEN in VOPBK

    *** Overlay for VOPASCE in VOPBK
    *
    *     +---------------------------+------+------+------+------+
    *  28 |///////////////////////////|:STDB0|:STDB1|:STDB2|:STDB3|
    *     +---------------------------+------+------+------+------+
    *  30
    *
    *** Overlay for VOPASCE in VOPBK

VOPBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    VOPADDR        0034
    VOPAGSIZ       0010
    VOPALETS       0025 04
    VOPAMO64       0001 40
    VOPAR          0003
    VOPARMS        0024
    VOPASCB4       002C
    VOPASCB5       002D
    VOPASCB6       002E
    VOPASCB7       002F
    VOPASCE        0028
    VOPASCEH       0028
    VOPASCEL       002C
    VOPASITS       0025 02
    VOPASUBR       0014
    VOPBAUTO       0074 80
    VOPBKLEN       0088 00000090
    VOPBKSIZ       0088 00000012
    VOPBUFAD       0018
    VOPBUFSP       0000 80
    VOPCODE        0027
    VOPEXADR       0070
    VOPEXFB0       0074
    VOPEXFB1       0075
    VOPEXFB2       0076
    VOPEXFB3       0077
    VOPEXFLG       0074
    VOPEXPRM       0025 08
    VOPEXTIN       0001 20
    VOPFETCH       0001 08
    VOPFLAG        0000
    VOPFLAG0       0000
    VOPFLAG1       0001
    VOPFONLY       0000 10
    VOPGADDR       0030
    VOPGAM64       0001 80
    VOPGA64R       0026 20
    VOPGA64S       0026 10
    VOPGHLAD       0038
    VOPGOTBF       0000 04
    VOPGRHL        001C
    VOPGSTAR       0026 01
    VOPGWRAP       0008
    VOPHADDR       0030
    VOPHLADR       003C
    VOPHLAEL       0044 00000010
    VOPHLAEN       0038
    VOPHLLEN       0040
    VOPIASIT       0068
    VOPIEP         0001 02
    VOPINFLG       0026
    VOPINFL0       0025
    VOPIPLCK       0020
    VOPLAP         0026 80
    VOPLAPFO       0026 80
    VOPLEN         0024
    VOPLENFD       0078
    VOPLENTH       0082
    VOPLNFLD       0074 40
    VOPLUNIT       007C
    VOPMAXLN       0080
    VOPMCRCD       0025 01
    VOPMXLEN       0074 20
    VOPNRLLK       0000 01
    VOPNXTMV       0000 08
    VOPPROT        0026 40
    VOPPSW         0088
    VOPPURGE       0002
    VOPREALA       0026 01
    VOPREGW        0026 08
    VOPRWERR       0000 40
    VOPSTD         002C
    VOPSTDB0       002C
    VOPSTDB1       002D
    VOPSTDB2       002E
    VOPSTDB3       002F
    VOPSTLOG       0000 20
    VOPSTORE       0001 04
    VOPWAS64       0001 10
    VOPWRPD        0026 04
    VOPWRP31       0026 02
    VOPWRP64       0026 06

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:31:40 EDT.
Copyright IBM Corporation, 1990, 2020