JPS6069737A - Virtual computer display control system - Google Patents

Abstract

PURPOSE:To allow one display type console to use an operating system in common by controlling whether a display screen is a virtual computer control screen or virtual computer use screen. CONSTITUTION:A virtual computer 10 is a device assigned a virtual hardware resource by a virtual computer control part (CP)11. When the display screen is the CP screen, an operating system (OS)12 when generating an instruction SIO for the OS screen checks a screen mode indication part 18 to confirm that the instruction can not be outputted, and that is reported to the OS12 through a device busy information part 16; when a timer processing part 17 causes a timer interruption, a screen switching part 22 switches the display screen to the OS screen in response to the report from the timer interruption processing part 26. The contents of the current display screen are shunted to a CP screen shunting area 2, and then the contents of an OS screen shunting area 4 are outputted to a console 20 to restore the OS screen and also places the indication part 18 in OS mode.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a virtual computer Disgray control system, in particular, a virtual computer control unit and an operating system (O8) running on a virtual machine that are integrated into one Disgray type system. console without conflicting display screens.
This invention relates to a virtual computer display control method that allows the virtual computer to be used as if it were independently occupied.

■) Prior art and problems A virtual computer system consists of real hardware including a central processing unit and various peripheral devices, and a virtual machine that controls a virtual machine (VM) by preparing a virtual computer environment. Sonobe (
cp) and a software group including a sprout rating system (O3) that executes data processing while being aware of the virtual needle n machine as if it were a real device.

Conventionally, it operates on the above-mentioned CP and VM. When the ``s'' and ``s'' shared a single system console, only a tigress type console was used. In the case of a printer type console, since messages are hard-copied, output is generally performed line by line, and there is little need to re-edit messages across multiple lines to make them easier to read. On the other hand, in the case of display devices, while there is generally a limit to the size of the display screen, the display format of the entire screen can be freely determined, making it possible to efficiently edit and output messages in an easy-to-read format. I can hope for it. However, if the display device is used as a common console between the CP and the O8 running on 7M, it is important to define a uniform display format for messages between the CP and the O8 in terms of compatibility and independence. Because it is difficult from
Messages from the CP and O8 would be mixed and output on one screen. Therefore, even if a display device was used as a system console, it was not possible to take advantage of the advantages of the display device. First, because the output format was similar to that of a typewriter-type console, it was thought that the conventional typewriter-type console was disadvantageous in that it could not make hard copies.

(Q. Purpose and Structure of the Invention The present invention aims to solve the above-mentioned problems by making it possible for a single display-type console to be shared by the CP and the O8 running on the VM, and by making it possible for the CP and the O8 running on the VM to The purpose is to prevent conflicts between messages from CP and messages from O3.In particular, the display screen is divided between CP and O3.
If the display screen is divided into 8 and 8, there will be a problem in processing the message display request from the O8 when the display screen is for the CP. We aim to report Pinot to O8 and create competitive fl+lI seedlings 11 without modifying the existing O8 or degrading its operability.

Therefore, the virtual computer display control method of the present invention provides a display type console in a virtual computer system in which a virtual computer is operated under a virtual 1' computer system, and at least a display screen of the display type console. a screen mode instruction section indicating whether the screen is a virtual computer control screen or a virtual computer use screen; - Equipped with a device busy notification section that notifies the device busy, and a screen control section that switches the screen mode and notifies the virtual machine of the device end after a predetermined time has elapsed since the device busy notification. Hereinafter, an explanation will be given according to an embodiment with reference to the drawings.

(2) Embodiments of the invention FIGS. 1 and 2 are explanatory diagrams of the outline of control according to the present invention,
FIG. 3 shows the configuration of an embodiment of the present invention.

In Figure 1, 1 is the virtual computer control screen of the display type console (hereinafter referred to as the 62 screen), 2 is the 02 screen save area, 3 is the virtual computer use screen of the display type console (hereinafter referred to as the O8 screen), and 4 is the O8 screen. Represents an evacuation area.

In the case of the present invention, for example, a C
There are 02 screen 1 mode and O8 screen 3 mode as the display screen states of the 0 day Solay type console which uses a display type console consisting of an RT display and a keyboard. The CP2 on-screen mode is a state in which CP commands for controlling the vM can be input, and only messages from the CP are displayed on the display screen at that time. On the other hand, the mode of the O8 screen 3 is a state in which OS commands can be input, and a screen that can be freely controlled by the O8 itself can be created.

Switching from 02 screen 1 to O8 screen 3 is performed, for example, in the following cases. First, at the initial program load (IPL) of the O8, the screen is automatically switched to the O8 screen 3. In this switching, the content displayed on the CP2 screen is saved to the 02 screen save area 2 secured in a predetermined storage area.

As O8 screen 3, the cleared display screen is carried over to O8 screen 1. Next, the BEGIN command executed with the CP command also performs a cutting sequence from 02 screen 1 to O8 screen 3. The display screen of the 008 screen 3 is read out from the O8 screen save area 4 and restored. The same applies below.

Also, so-called program attention 2 (PA2
) key is also pressed. Furthermore, as will be described later with reference to FIG. 2, the O8 performs input/output activation (SIQ: 5
tart engineeringnpLLtQtLtptbt) command, the O
8 Switching to screen 3 is performed.

Switching from the O8 screen 3 to the CP screen is performed, for example, in the following cases. When the PA2 key is pressed in the O8 screen 3 mode, the screen is switched to the 02 screen 1. In this case, the contents of the OS screen 3 are saved in the O8 screen save area 4, and the display on the 02 screen 1 is restored from the 02 screen save area 2. This saving and restoring is performed in the same way at the time of the following switching p.

A failure occurred in O85, and the OS was unable to continue processing.
In other words, disable weight (DL3αhltwa
It is also possible to switch to the CP screen even if the screen is in the CP screen. Also, when there is an emergency message from the CP to the operator, or when, for example, 44 lines of normal messages from the CP have accumulated, switching from 08 screen 3 to 02 screen 1 is performed.

Particularly in the case of the present invention, when in the CP screen modification mode, O8
issues an SIO command to change the o”s screen,
For example, the control is performed as shown in FIG.

Note that since the O8 is processed assuming that it occupies the console, the SIO command may frequently be issued when the 02 screen 1 is displayed. Assuming that in response to the issuance of an SIO command by the OS, the CP screen is immediately switched to O8 screen 3 unconditionally, when the 4th controller is about to enter a CP command on the CP screen, for example, the operation will be executed. Unable to continue. Further, for example, when there are a large number of consecutive OS messages, it becomes impossible to maintain the state of 02 screen 1.

Therefore, as shown in Fig. 2, when the OS issues an SIO command, if it is in the CP screen mode, the so-called condition code CC =i as the execution result and device busy as the channel status word. After a predetermined period of time, for example 60 seconds, 02
Switch from screen 1 to O8 screen 3 and notify O8 of the device end interrupt. During this time, the O8 can continue other processing without stopping, and learns that the console is now available by receiving a device end interrupt pseudo-generated by the CP. If the SIO command suspended due to the previous device busy is executed again, output to the O8 screen 3, etc. will be performed. On the other hand, the operator can check the 02 screen 1 and input necessary CP commands during the 60 second grace period.

The time at the device end interrupt size from the above device busy report does not necessarily have to be 60 seconds, but
It is desirable that the console input/output monitoring time is shorter than the usual 3 minutes, and that the time does not interfere with the operator's operations on the 02 screen 1.

FIG. 3 shows a block diagram of an embodiment of the present invention. In the figure, numerals 2 and 4 correspond to those in FIG. 1, 10 is a virtual machine (VM), 11 is a virtual machine control unit (CP), 1
2 is an operating system (O8), 13 is an application processing unit, 14 is a program interrupt handler, 15 is a start I10 simulator, 16 is a device busy notification unit, 17 is a timer processing unit, 18 is a screen mode instruction unit, 1
9 is the input/output management section, 2o is the display type console,
21 is a screen control unit, 22 is a screen switching unit, 23 is an attention processing unit, 24 is a device end notification unit, 25 is an input/output interrupt processing unit, 26 is a timer interrupt processing unit, 27 is a temporary 18I10 reflection unit, and 28 is a CP message control unit, 2
9 is a message queue management section, 30-1 to 30-
3 represents the cp message queue.

VM 10 uses virtual hardware resources as CPII
This is the device assigned by. CPll is vMl
o, manages memory mapping tables, issues commands related to input/output to real input/output devices, handles various interrupts, etc. The OS 12 operates various application processing units 13 that operate under it.
performs the data processing required by the user while utilizing various functions of the 0812. O8 authentication processes vMIO as one independent computer. However, since 0812 runs in so-called Zoloprem mode, SIO
When the instruction is issued, a program interrupt is generated due to the prohibition of the use of privileged instructions, and control is transferred to the program interrupt handler 14 of the CpH.

The program interrupt handler 14 analyzes the cause of the program interrupt and executes processing according to the cause. If it is due to the issuance of an SIO command, it is checked whether the SIO command was issued from the OS 12, and then the start I10 simulator 15 is notified. Start I10 simulator 15 is
0812 created channel command word (CC
W), performs address conversion, etc. as necessary, and makes it possible to actually issue an SIO instruction.

The device busy notification unit 16 notifies the device busy described in FIG. 2, especially when the SIO command targets the display type console 20. At this time, the timer processing unit F is requested to set a timer for 60 seconds.

The screen mode instruction unit 18 is a display type console 2
This is to store whether the current display screen of 0 is the 02 screen or the O8 screen. In addition, in case the screen cannot be changed immediately even though the screen needs to be changed, for example, because an input/output command is in the middle of execution, a bending bit is also provided to indicate the condition. .

The input/output management unit 19 executes SIO commands to actual input/output devices. The display type console 20 includes, for example, a CRT display and a keyboard. Screen control unit 211d, screen switching unit 2 that switches from the CP screen to the O8 screen or from the O8 screen to the CP screen
2, an attention processing unit 23 that processes attention due to pressing of the PA2 key, and a device end notification unit 24 that notifies the pseudo device end explained in FIG. The input/output interrupt processing unit 25 receives and processes input/output interrupts. The timer interrupt processing unit 26 receives interrupts from clock controllers and regulators for the timer set by the timer processing unit 17.

The virtual I10 reflection unit 27 notifies the execution processing result of the SIO command issued by 0812. Normally, control is transferred to the beginning of the input/output interrupt handler that the 0812 has, and it is simulated as if an input/output interrupt had actually occurred.

The CP message control unit 28 controls messages issued by CpH and to be displayed on the CP screen. For example, since the message queue management unit 29 cannot immediately output a CP message to Yang Jin whose display type console 20 is in the O8m mode, the message queue management unit 29 outputs a CP message queue 3o −1 in one pulse of issuing a CP message.
, 30-2, . . .

For example, suppose that the 0812 issues an SIO command to the display type console 20 when the screen mode instruction unit 18 indicates the O8 screen mode. In this case, the SIO instruction is detected by the program interrupt hand 14, checked by the start I10 simulator 15, and immediately executed via the input/output management section 19. When the input/output processing is completed, a notification is sent to the screen control unit 21 via the input/output interrupt processing unit 25, and the execution result of the SIO command is notified from the virtual I10 reflection unit 27 to the OS12. Note that the screen control unit 21 checks the bending bit at this time.

On the other hand, when the CP screen is displayed, OS 12
If an IO command is issued, it will be processed as follows. When the start I10 simulator 15U is notified of an SIO command from the program interrupt handler 14, it checks the screen mode instruction section 18.

In this case, since it is in the CP screen mode, it recognizes that it cannot output immediately, and activates the device busy notification section 16. The device busy notification unit 1G notifies 0812 that the device is busy, and also requests the timer processing unit 17 to set a 60 second timer. 60
When a timer interrupt occurs after seconds have elapsed, the screen switching unit 22 first switches from the 02 screen to the O3 screen in response to a notification from the timer interrupt processing unit 26. In this switching, the content of the current display screen is read out by an input/output command and saved to the 02 screen save area 2, then the content read from the O8 screen save area 4 is output to the display type console 20, and the content read from the O8 screen save area 4 is output to the display type console 20. restore. Then, the screen switching is completed by setting the mode of the screen mode instruction section 18 to the O8 screen mode. Note that if the screen switching cannot be processed immediately, a bending bit is set in the screen mode instruction section 18.
Execute the switch after the bending condition is removed. When the 02 screen is switched to the 08 screen, the device end notification unit 24 displays a pseudo device.
The end is notified to the virtual I10 reflection unit 27. virtual I10
The device end interrupt is reported from the reflection unit 27 to 0812, and 0812 is sent to the display type console 20.
to know that it is ready for use.

The O8 screen can be updated by issuing the SIO command again.

In the 02 screen mode, when there is a message from the CpH to the operator, the CP message control unit 28 immediately outputs the message to the display type console 20. However, in the O8 screen mode, the CP message cannot be output, so the message queue management section 29 outputs the CP message queue 30-1.
30-2. ...close it and keep it. If there is an urgent message that has a significant impact on system operation,
Or, for example, if 44 lines of normal CP messages are accumulated, the CP message control section 28 sends a message to the screen control section 2.
A request is made to switch the screen to 1. In the same way as the above switching process from the 02 screen to the O8 screen, the 02 screen is changed from the O8 screen to the O8 screen.
The screen is switched to a state where the CP message can be output.

For example, when the PA2 key is pressed, a so-called attention interruption occurs. This interrupt is notified to the attention processing unit 23, and the attention processing unit 23c
9. Find out the cause of the interrupt caused by pressing the PA2 key using the read modify command. This activates the screen switching section 22 and switches the screen. Note that switching by a BEGIN command or the like is performed in the same manner, so the explanation will be omitted.

(5) As described in detail, according to the present invention, a display type console can be used in a virtual computer system by taking advantage of the advantages of the display. In particular, control similar to the control of display screens such as manual frames and program frames, which are known from displays such as Service Zorosetza (SVP), is realized in the virtual machine control unit and O8 of the virtual machine. 0 that becomes possible

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are explanatory diagrams of the control overview according to the present invention,
FIG. 3 shows the configuration of an embodiment of the present invention. In the figure, 1 is the cp screen, 3 is the O8 screen, 10 is the virtual computer, 11 is the virtual computer control unit, 12 is the operating
system, 16 is a denoise busy notification sound b518 is a screen mode instruction section, 20 is a display type console,
21 represents the screen control unit, 22 represents the screen switching unit, and 24 represents the device end notification unit. Patent applicant: Fujitsu Ltd. Representative Patent Attorney 6 1) Hiroshi (gut1 person)

Claims (1)

[Claims] In a virtual computer system in which a virtual computer is operated under a virtual computer control unit, a display type console is provided, and at least it is possible to indicate whether the display screen of the Disgray type console is a virtual computer control screen or a virtual computer use screen. a screen mode instruction section for indicating the device busy; a device busy notification section for notifying the device busy in response to a display request from the virtual computer when the screen mode instruction section indicates a virtual machine control screen; A virtual computer display gray control method comprising: a screen control unit that notifies the virtual computer of a device end by switching the screen mode after a predetermined time has elapsed from notification.