CA2050834A1 - Multiple controlled data-space facility - Google Patents

Multiple controlled data-space facility

Info

Publication number
CA2050834A1
CA2050834A1 CA2050834A CA2050834A CA2050834A1 CA 2050834 A1 CA2050834 A1 CA 2050834A1 CA 2050834 A CA2050834 A CA 2050834A CA 2050834 A CA2050834 A CA 2050834A CA 2050834 A1 CA2050834 A1 CA 2050834A1
Authority
CA
Canada
Prior art keywords
host
controlled data
multiple controlled
data space
space facility
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2050834A
Other languages
French (fr)
Other versions
CA2050834C (en
Inventor
David P. Brelsford
Melvin M. Cutler
Jean-Louis Lafitte
Joseph M. Gdaniec
Damian L. Osisek
Kenneth E. Plambeck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2050834A1 publication Critical patent/CA2050834A1/en
Application granted granted Critical
Publication of CA2050834C publication Critical patent/CA2050834C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/52—Program synchronisation; Mutual exclusion, e.g. by means of semaphores
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
    • G06F12/0292—User address space allocation, e.g. contiguous or non contiguous base addressing using tables or multilevel address translation means

Abstract

A method and apparatus for providing common access to data spaces by a plurality of virtual machine guests emulated on a host computer system. A token received from a given one of the virtual machine guests is used to identify a particular host data space. The guest also supplies an offset. The offset and the identified host data space are then used to derive a host absolute address representative of a data location in the host data space.
CA002050834A 1990-10-02 1991-09-06 Multiple controlled data-space facility Expired - Fee Related CA2050834C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/577,395 US5230069A (en) 1990-10-02 1990-10-02 Apparatus and method for providing private and shared access to host address and data spaces by guest programs in a virtual machine computer system
US577,395 1990-10-02

Publications (2)

Publication Number Publication Date
CA2050834A1 true CA2050834A1 (en) 1992-04-03
CA2050834C CA2050834C (en) 1995-12-12

Family

ID=24308531

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002050834A Expired - Fee Related CA2050834C (en) 1990-10-02 1991-09-06 Multiple controlled data-space facility

Country Status (4)

Country Link
US (1) US5230069A (en)
EP (1) EP0478978A3 (en)
JP (1) JPH0769844B2 (en)
CA (1) CA2050834C (en)

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Also Published As

Publication number Publication date
JPH04247528A (en) 1992-09-03
CA2050834C (en) 1995-12-12
EP0478978A2 (en) 1992-04-08
JPH0769844B2 (en) 1995-07-31
US5230069A (en) 1993-07-20
EP0478978A3 (en) 1993-03-24

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