JPH01316833A - System for changing constitution of virtual computer system - Google Patents

Abstract

PURPOSE:To heighten the flexibility of a virtual compute system by constituting a system so that device allocation information to a guest operating system can be changed freely. CONSTITUTION:A device managing means (I/O driver) 2 controls an I/O instruction from the guest operating system based on the device allocation information 1 representing the allocation of each device on the guest operating system. A constitution change means (constitution change utility) 4 can change the device allocation information 1 by a console 5 consisting of a CRT, a keyboard, and a mouse, etc. A constitution change informing means 3 informs the change of the device allocation information by the constitution change means 4 to a device managing means 2. A system loader (VMM loader that is a part of a monitor in the virtual computer system) 6 develops the device allocation information on a memory at the time of starting up the system.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for changing the configuration of a virtual computer system.

[Prior Art] In a virtual computer system for a large computer, it is necessary to allocate devices (peripherals) to each of multiple operating systems (guest operating systems). How to allocate each device was given as system-generated information before starting the guest operating system.

[Problem to be solved by the invention]

As mentioned above, in conventional virtual computer systems, it is necessary to assign system generation information before starting the guest operating system, and even if there is a change in the system configuration, the guest operating system This had to be done before the launch. Therefore, the system configuration cannot be changed after the guest operating system has started up, and there is a drawback that flexible operation cannot be performed. Additionally, device assignments are valid only within the range defined by the guest operating system's system configuration, so if you attempt to change device assignments beyond that range, the system creation of the guest operating system must be done. It had the disadvantage of having an impact.

On the other hand, in conventional virtual computer systems, there is no concept of sharing disks (hard disks, floppy disks, etc.) between different guest operating systems, and it is not possible to set or change them using system-generated information. However, the disadvantage was that the degree of freedom in system configuration was low.

The present invention has been proposed in view of the above points, and its purpose is to make it possible to freely change the system configuration after starting the guest operating system, and also to freely share disks. The purpose of this invention is to provide a method for changing the configuration of a virtual computer system.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a loading means for deploying device allocation information to a guest operating system of a virtual machine system on a memory at the time of system startup, and a loading means for loading device allocation information to a guest operating system of a virtual machine system, and a device management means for managing devices based on the above information; a configuration change means for displaying the device allocation information on a display and allowing modifications and changes; and a configuration change notification means for notifying the device management means of the modified information. I am trying to prepare for this.

[Effect]

In the configuration change method of a virtual computer system of the present invention, the loading means develops device allocation information for the guest operating system of the virtual computer system on the memory at the time of system startup, and the device management means stores the device allocation information to the guest operating system of the virtual computer system. A configuration change means displays the device allocation information on a display and enables modification and change, and a configuration change notification means notifies the device management means of the modified information.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram showing an embodiment of a configuration change method of a virtual computer system according to the present invention. In FIG. 1, this embodiment includes device allocation information 1 indicating the allocation of each device to the guest operating system, and device management means (I10
driver) 2 and a configuration change means (configuration change utility) 4 that allows device allocation information 1 to be changed using a console 5 consisting of a CRT, keyboard, mouse, etc.
, a configuration change notification means 3 that notifies the device management means 2 that the device allocation information 1 has been changed by the configuration change means 4; It consists of a VMM loader (VMM loader) 6 which is a part of the monitor of the computer system.

FIG. 2 shows an example of the logical configuration of the device allocation information 1 in FIG. 1, and the device allocation information l is
Device name, device status, device mode corresponding to device number.

It is a collection of information such as available O3 indicating the number of the guest operating system that can access the device. Note that RFU is a reserve item for future use.

FIG. 3(a) shows an example of the data structure of the status in the device allocation information 1 in FIG. 2, and the illustrated state is expressed by the value of each bit. Also,
FIG. 3(b) shows an example of the data structure of the mode in the device allocation information 1 in FIG. 2, and it is possible to set whether it can be shared by a plurality of guest operating systems. Moreover, FIG. 3(C) shows an example of the data structure of usable O3 in the device allocation information 1 in FIG.
0 to guest operating system #7.

FIG. 4 shows an example of the operation of changing the device allocation information 1, where (a) is before the change and (b) is after the change. That is, for the device allocation information I expanded on the memory by the system loader 6, for example, if the user wants to also allocate the FD unit #l that is allocated to the guest operating system #l to the guest operating system #3. , the device number 21 of the device allocation information 1 is changed by the configuration change means 4 using the console 5.
The usable O8 column of FD unit #1 is set from 02 (00000010 in bits) to 0A (00001OI).
By changing to O), the FD unit #1, which before the change could only be accessed from the guest operating system #1, can now be accessed from the guest operating system #3 as well, from the correspondence shown in FIG. 3(C). In other words, the floppy disk inserted in FD unit #1 can now be shared between guest operating system #1 and guest operating system #3, and the floppy disk inserted in FD unit #1 can be shared by guest operating system #1 or guest operating system #3.
When there is a request for access to 1, the device management means 2 permits the access.

〔Effect of the invention〕

As explained above, in the virtual machine system configuration change method of the present invention, the device allocation information to the guest operating system can be freely changed using the console etc., so the system configuration can be changed after the guest operating system is started. In addition to making dynamic changes possible, disks can also be shared freely, which has the effect of increasing the flexibility of the virtual computer system.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an example of the configuration change method of a virtual computer system of the present invention, FIG. 2 is a logical configuration diagram showing an example of device allocation information in FIG. 1, and FIG. FIG. 4 is a data structure diagram of the status, mode, and usable O5 in the device assignment information, and FIG. 4 is an explanatory diagram of the operation of changing the device assignment information. In the figure, 1: device allocation information, 2: device management means, 3: configuration change notification means, 4: configuration change means, 5: console, 6: system loader.

Claims (1)

[Scope of Claims] Loading means for deploying device allocation information for a guest operating system of a virtual computer system onto memory at system startup; device management means for managing devices based on the device allocation information; A configuration of a virtual computer system characterized by comprising: a configuration change means for displaying device allocation information on a display and allowing correction/change; and a configuration change notification means for notifying the device management means of the corrected information. Change method.