JPH04178859A - Input/output execution system for virtual computer system - Google Patents

Abstract

PURPOSE:To utilize a virtual computer system (VCS) from a remote place by allowing an operating system (OS) in the VCS to input/output data also to/from an I/O device included in another real computer system. CONSTITUTION:When the OS 12 controlled by a virtual computer monitor 11 generates an input/output (I/O) execution instruction, a checking means 114 decides whether the I/O execution instruction is applied to the 1st I/O device 4 included in the 1st real computer system 1 or the 2nd I/O device included in the 2nd real computer system 3. When the instruction is applied to the 1st I/O device 4, the monitor 11 executes the I/O operation of the device 4 in accordance with the instruction, and when the instruction is applied to the 2nd I/O device 5, the 2nd system 3 is instructed to execute the I/O operation of the 2nd I/O device 5 in accordance with the instruction via a communication line 2. Consequently, the VCS can be utilized from a remote place through the simple real computer system.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an input/output execution method for a virtual computer system,
In particular, the present invention relates to an input/output execution method for a virtual computer system that allows input/output from a virtual computer to an input/output device of a real computer system other than the real computer system in which the virtual computer system is operated.

[Prior Art] Conventionally, the input/output operations performed by the operating system on a virtual computer system, that is, the operating system of a virtual computer, are limited to those to input/output devices provided in the real computer system on which the virtual computer system is operated. , input/output devices of other real computer systems were not covered.

[Problem to be solved by the invention]

As mentioned above, conventionally, the input/output operations performed by the operating system on a virtual computer system are
Since the type of input/output device that can be used for input/output processing is limited to the input/output devices of the real computer system that is operating the l system, the types of input/output devices that can be used for input/output processing are the input/output devices that are connected to the real computer system that is operating the virtual computer system. There is a problem that the type of output device is limited, and there is also a problem that the virtual computer system cannot be used from a remote location. Furthermore, when the usage rate of the input/output device is high, there is a problem that the input/output device cannot be used for purposes such as device testing.

The purpose of the present invention is to limit the types of input/output devices that can be used by enabling the operating system on a virtual computer system to perform input/output to input/output devices owned by other real computer systems. The purpose of this invention is to eliminate restrictions on the purpose of use (equipment testing, etc.) when the usage rate is high, and to make it possible to use a virtual computer system from a remote location.

[Means to solve the problem]

In order to achieve the above object, the present invention includes: a first real computer system in which a virtual computer system is operated, which includes a virtual computer monitor and an operating system that is controlled by the virtual needle YTM monitor; and a second real computer system connected via a communication line, the virtual machine monitor is configured to: when the operating system issues an input/output execution instruction, the input/output execution instruction is comprising a check means for determining whether the input is for a first input/output device included in the first real computer system or for a second input/output device included in the second real computer system; If it is determined that the input/output execution command is for the first input/output device, the first
executes the input/output operation according to the input/output execution instruction for the input/output device, and if it is determined that the input/output operation is for the second input/output device, executes the input/output operation for the second actual computer system. Instructing the second input/output device to execute an input/output operation according to the input/output execution instruction via a communication line.

[For production]

When the operating system controlled by the virtual machine monitor issues an input/output execution command, the checking means determines whether the input/output execution command is directed to the first input/output device of the first actual ytm system that operates the virtual machine system. It is determined whether the input is for a second input/output device included in a second real computer system connected to the first real computer system via a communication line.

If it is determined that the input/output execution command is for the first input/output device, the virtual machine monitor executes the input/output operation according to the input/output execution command for the first input/output device. However, if it is determined that the input/output operation is for the second input/output device, the input/output operation according to the input/output execution command is performed on the second actual computer system via the communication line. Instructs to execute.

[Example] Next, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, in which a real computer system 1 in which a virtual computer system is operated, a real computer system 3 connected to the real computer system 1 via a communication line 2, and an actual It consists of an input/output device 4 connected to the electrical system 1 and an input/output device 5 connected to the real computer system 3. In the figure, there is one input/output device connected to each of the actual electrical machinery systems 1 and 3, but a plurality of input/output devices may exist. Furthermore, there may be a plurality of operating systems under the control of the virtual machine monitor 11.

Actual total XIS! The system 1 includes a virtual machine monitor 11 and an operating system (O3) 12 controlled by the virtual machine monitor 11.

The virtual computer monitor 11 has a communication means 111 that performs communication with the actual YTM system 3, and an input/output device of another system that performs processing such as sending input/output requests to the actual computer system 3 via the communication means 111. The output processing means 112, the input/output execution command recognition means 113 that recognizes that the operating system 12 has issued an input/output execution command, and the input/output execution command issued by the operating system 12 is an input/output command! 4.5, and an input/output device that interprets whether the input/output execution command for the input/output device 5 is an input execution command, an output execution command, or another command. An operation interpretation means 115, a completion notification means 116 that notifies the operating system 12 of the completion of an input/output operation, and an own input/output processing means 117 that performs an input/output operation on the input/output device 4.
Contains. The checking means 114 includes a table T in which the identifier of the input/output bag 24.5 and the identifier of the actual computer system 1.3 to which the input/output device 4.5 is connected are registered in correspondence.

The real computer system 3 includes a communication means 31 for communicating with the real computer system 1, a request checking means 32 for determining whether or not it is possible to accept an input/output request from the real computer system 1, and request processing means 33 for performing input/output operations in accordance with input/output requests.

Next, the operation of this embodiment will be explained.

When an input/output execution instruction is issued from the operating system 12 controlled by the virtual computer monitor 11 of the real computer system 1, an interrupt occurs in the virtual computer monitor 11, and the virtual computer monitor 11 is activated by the input/output execution instruction recognition means 113. Recognize it and further check means 1
14, the input/output execution command is actually calculated using YTM system 1.
It is determined whether the input/output bag W4 is connected to the input/output bag W4 connected to the input/output bag W4 connected to the input/output bag W5 connected to the reliability computer system 3. Here, the input/output execution instruction issued by the operating system 12 includes an identifier of the input/output device that executes the input/output, and the checking means 114 checks the identifier of the input/output device included in the input/output execution instruction. Based on the contents of table T, it is determined whether the input/output execution command is for the input/output device 4 connected to the actual computer system 1 or the input/output device 5 connected to the actual computer system 3. to judge whether

If the checking means 114 determines that the input/output execution command is for the input/output device 4 connected to the real computer system 1, the virtual computer monitor 11
uses its own input/output processing means 117 to perform input/output operations on the input/output device 4 in the same manner as before, and when the input/output operation is completed, it issues an input/output execution command using the completion notification means 116. The operating system 12 is notified accordingly.

Further, if the checking means 114 determines that the input/output execution command is for the input/output device 5 connected to the real computer system 3, the virtual computer monitor 11
The input/output execution command issued by the operating system 12 using the input/output operation interpreting means 115 is a command that instructs data input from the input/output device i5. It is determined whether the command is another command (for example, a command to clear information related to human output such as the number of input/output errors held in the actual computer system 3). If the input/output operation interpretation means 115 determines that the input/output execution command is a command other than an instruction for input or output, it notifies the operating system 12 that the input/output execution command cannot be executed. do.

If the input/output operation interpretation means 1]5 determines that the input/output execution command issued by the operating system 12 is an instruction to input data, the virtual machine monitor 1
1 sends an input request to the input/output device 5 to the actual computer system 3 via the communication line 2 using the input/output processing means 112 and communication means 111 of another system, and the communication means 111 receives data or a notification of completion. wait for.

An input request sent from the real computer system 1 to the input/output device 5 is received by the communication means 31 in the real computer system 3, and the request checking means 32 checks that when the communication means 31 receives the input request, the input/output device 5 receives the data. Determine whether input is possible. And input/output device 5
If it is determined that the data input is not possible, the request checking means 32 checks the communication means 311 communication times 11.
2, a completion notification indicating that input is not possible is sent to the actual computer system 1. If it is determined that the input/output device 5 is ready for data input, the request checking means 32 activates the request processing means 33. Thereby, the request processing means 33 inputs data from the input/output bag W5 in accordance with the input request received by the communication means 31, transmits the input data to the actual computer system l via the communication means 315 communication line 2, and transmits the input data to the actual computer system l via the communication means 315 communication line 2. When the input is completed, the communication means 311 transmits a completion notification indicating the input completion state to the actual computer system 1 via the communication circuit M2.

When the communication means 111 receives data from the real computer system 3, the virtual needle Xl5I monitor 11 uses the input/output processing means 112 of another system to transfer the data received by the communication means 111 to the memory in the real computer system 1 (not shown). When the communication means 111 receives a completion notice indicating that input from the real computer system 3 is not possible or a completion notice indicating an input completion state, the communication means 111 sends a message to the other system's input/output processing means 112. The completion notification means 116 is used to notify the operating system 12 that issued the input/output execution command.

Further, if the input/output operation interpretation means 115 determines that the input/output execution command issued by the operating system 12 is an instruction to output data, the virtual machine monitor 11 communicates with the input/output processing means 1121 of the other system. Means 11
1 is used to send an output request to the input/output device 5 to the actual computer system 3 via the communication line 2, and the communication means III
waits for the response from the real computer system 3 to be received.

The output request from the real computer system 1 is received by the communication means 31 in the real computer system 3, and the request checking means 32
When the communication means 31 receives an output request, the input/output bag W5
Determine whether or not it is ready for output. If it is determined that the output is not possible, the communication means 312 sends a completion notification indicating that the output is not possible to the actual computer system 1 via the communication line 2. If it is determined that the output is possible, the communication means 31 sends a response signal indicating that the output is possible to the actual computer system 1 via the communication line 2.

When the communication means 111 receives a completion notification indicating that output is not possible, the virtual machine monitor 11 communicates with the input/output processing means 11 of the other system.
2. Notify the operating system 12 that issued the input/output execution command using the completion notification means 116,
When the communication means 111 receives a response signal indicating that output is possible, the output data is read from the memory (not shown) in the actual computer system 1 using the input/output processing means 112 of another system, and the read data is transferred to the communication means. 111. iii transmission to the actual computer system 3 via the communication line 2.

The request processing means 33 in the actual computer system 3 is the communication means 3
1 receives data from the real computer system 1, it outputs the received data to the input/output device 5 according to the output request already received by the communication means 31, and when the data output is completed, the communication means 312 outputs the data via the communication line 2. A completion notification indicating that data output has been completed is transmitted to the actual computer system 1.

When the communication means 111 receives a completion notification indicating that data output has been completed, the virtual machine monitor 11 communicates with the input/output processing means 112 . The completion notification means 116 is used to notify the operating system 12 that issued the input/output execution instruction.

〔Effect of the invention〕

As explained above, the present invention provides an input/output execution command issued by an operating system on a virtual computer system to a first input/output device of a first real computer system operating the virtual computer system. A checking means is provided for determining whether the object is for a second input/output device of a second real computer system connected to the first real computer system via a communication line, and the checking means determines whether the operating system If it is determined that the input/output execution command issued by is for the first input/output device, the input/output operation is performed for the first input/output device, and the input/output operation is performed for the second input/output device. If it is determined that this is the case, the second real computer system is instructed to execute the input/output operation to the second input/output device according to the input/output execution instruction via the communication line. The first input/output device of the first real computer system that is operating the virtual computer system and the second input/output device of the second real computer system can be connected in the same way without making the operating system aware of it. becomes possible to handle. Therefore, according to the present invention, it is possible to use a virtual computer system from a remote location using a simple real computer system, and the types of input/output devices that can be used are This has the effect of not being limited to the input/output devices that the first real computer system has.

Furthermore, the usage rate of the first input/output device of the first real computer system that operates the virtual computer system is high, and the first input/output device cannot be used for purposes such as device testing. Even in this case, there is an effect that it becomes possible to perform a device test or the like using the second input/output device included in the second real computer system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the invention. In the figure, 1.3...actual computer system, 2...
Communication line, 11... Virtual computer monitor, 12... Operating system (O3), 4.5... Input/output device, 31, 111... Communication means, 32... Request checking means, 33. ...Request processing means, 112...
Input/output processing means of other systems, 113... Input/output execution command recognition means, 114... Checking means, 115... Input/output operation interpretation means, 116... Completion notification means, 117.
...Input/output processing means of own system, T...table.

Claims (2)

[Claims] (1) A first real computer system that includes a virtual computer monitor and an operating system controlled by the virtual computer monitor, and in which the virtual computer system is operated; and a communication line with the first real computer system. and a second real computer system connected thereto, the virtual computer monitor is configured such that when the operating system issues an input/output execution instruction, the input/output execution instruction is transferred to a first real computer system of the first real computer system. or a second input/output device of the second real computer system, the checking means determines whether the input/output execution command is directed to the first input/output device. If it is determined that the device is for an input/output device, the first
executes the input/output operation according to the input/output execution instruction for the input/output device, and if it is determined that the input/output operation is for the second input/output device, executes the input/output operation for the second actual computer system. An input/output execution method for a virtual computer system, comprising instructing the second input/output device to execute an input/output operation according to the input/output execution instruction via a communication line. (2) The input/output execution command includes an identifier of the input/output device that executes the input/output, and the checking means registers the identifier of the input/output device and the identifier of the actual computer system to which the input/output device is connected in correspondence. and whether the input/output execution command is for the first input/output device or not based on the identifier included in the input/output execution command and the contents of the table. 2. The input/output execution method for a virtual computer system according to claim 1, further comprising determining whether the input/output is for a device.