JPH01263836A - Information transfer system for virtual computer system - Google Patents

Abstract

PURPOSE:To reduce the address conversion loss which is caused when the information is transferred between a real computer and a virtual computer by using a transfer instruction that can designate one of two transfer objects via a logical address of the real computer and the other transfer object via a logical address of the virtual computer respectively. CONSTITUTION:A real memory space 101 is divided into four spaces, i.e., a real computer memory space 102 and the virtual computer memory spaces 103 to 105. Each of these four spaces is divided into the fixed number of pages and a real page is attained with the segment and page numbers shown in a logical address. For instance, an address alpha of a real computer logical space 6 shows a real page 113 together with an address beta of a virtual computer logical space 13 showing a real page 123 respectively. Furthermore the spaces 103 to 105 are not defined in the space 6 and therefore the accesses given to the spaces 103 to 105 must be all designated in the virtual computer logical addresses.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a virtual computer system in an information processing device, and particularly relates to the information transfer capability 1 of a virtual total 1Ea system.

[Conventional technology]

Virtual computer systems were created based on the desire to evaluate newly developed software systems without causing any disturbance to the operational system. By providing an independent operating system to a virtual machine, it is possible to build a highly reliable system in which the failure of one operating system does not affect other operating systems, and to make effective use of hardware resources. At the same time, the field of use of virtual 31' machine systems is expanding, such as the operation of different operating systems on i Usually, it has a control program called a virtual computer monitor, and by simulating control instructions executed by the virtual computer with software, it fills the resource gap between the virtual computer and the real computer.

A typical work element of this operation requires a transport instruction to exchange information between the storage space of the virtual machine and the storage space of the real computer.

Here, a method for implementing a transfer command in the prior art will be explained with reference to FIG.

In FIG. 4, the real storage space 201 is the real computer storage space 202.
FIG. 2 is a block diagram showing how the storage space is divided into virtual computer storage spaces 203 to 205. This type of computer also employs a generally well-known virtual memory system, so the real memory space 201 is divided into pages of a fixed capacity.
The real page is reached by tracing control structures such as a segment table (hereinafter abbreviated as S'F) and a page table (hereinafter abbreviated as r)T) from the segment number and page number indicated at the logical address.

For example, on the logical space of the actual 1γ machine BM, the logical address α is
Real page 213 via ST211 and PT212
is pointing to. Further, in the logical space of the virtual machine VM3, the logical address β points to the real page 223 via 5T221 and PT222.

Conventionally, the γ space 202 described by such a real computer BM is
real page 213 and storage space 20 of virtual machine VM3
When executing a transfer command that exchanges information with the real page 223 in 5, the actual total 11, the virtual total q machine RM, and the virtual total q machine VM3.
Because there was no transfer command that could specify addresses in different logical spaces, virtual total) 11:a address space 205
Considering this as an extension of the actual computer storage space 202, the rough total) 7aB
It attached it to the logical space of M, converted the logical address of the virtual computer VM3 to the logical address of the real computer BM, and then issued the transfer command.

For example, the logical address β on the logical space of the virtual computer VM3 mentioned above points to the real page 223 via the control structure in the storage space 205 of the virtual computer iVM3, but this real page 223 is simultaneously connected to the real computer. It is pointed to by a logical address δ on the storage space 202 of BM via 5T211 and PT214, and the logical address β of the virtual machine VM3 is pasted to the logical address δ of the real computer HM. Real computer storage space 2 of such virtual computer storage space 205
02, and then points to the respective real pages 213 and 223 using the logical address α and the logical address δ in the logical space F of the real 81 computer BM, and transfers the information+U. It was technology.

[Problem to be solved by the invention]

In the conventional information transfer method of the virtual computer system described above, it is necessary to convert the logical address in the logical space of the virtual machine to be transferred to a logical address in the logical space of the real computer before executing the existing transfer instruction. Therefore, there is a drawback that the software execution time required for converting the logical address is excessive.

In addition, since it was necessary to paste a part of the logical space of the actual computer 'ia to the virtual computer storage space, the logical space of the actual computer cannot be freely used by the real computer, and in effect, the logical space of the actual computer 'ia is The disadvantage is that the logical space is reduced.

In view of the above-mentioned points, it is an object of the present invention to reduce the overhead loss associated with mutual information transfer between the logical space of a real computer and the logical space of a virtual computer, and to attach the virtual computer storage space to the logical space of the real computer. An object of the present invention is to provide an information transfer method for a virtual computer system that eliminates the need for virtual computer system logical space and makes the most effective use of the logical space of a real computer.

[Means to solve the problem]

Information transfer power L (of the virtual computer system of the present invention) is a virtual computer number that specifies a virtual 1γ machine in a virtual 3γ machine system that can operate multiple virtual iJ computers on - of a real computer; A specifying means for specifying a logical address on the logical space of the virtual old computer, a logical address on the logical space of the real computer, and a capacity to be transferred, and a logical address on the logical space of the virtual computer specified by the specifying means. Actual total from
Q. A machine instruction for transferring capacity information to a logical address in the logical space of the machine.

Furthermore, the information transfer method of the virtual computer system of the present invention is as follows:
In a virtual computer system that can operate multiple virtual computers on a real computer, the virtual machine number that identifies the virtual computer, the logical address in the logical space of the virtual computer, and the logical space address of the real computer are A specifying means for specifying a logical address and a customer address to be transferred, and transferring the capacity information from the logical address on the logical space of the real computer specified by this specifying means to the logical address on the logical space of the virtual computer. Equipped with one machine instruction.

[Effect]

In the information transfer method of the virtual computer system of the present invention, the specifying means specifies the virtual computer number that specifies the virtual computer, the logical address in the logical space of the virtual computer, the logical address in the logical space of the real computer, and the capacity to be transferred. The machine instruction transfers the capacity information from the logical address in the logical space of the virtual machine specified by the specifying means to the logical address in the logical space of the real computer.

Further, in the information transfer method of the virtual computer system of the present invention, the specifying means transfers the virtual computer number for specifying the virtual computer, the logical address in the logical space of the virtual computer, the logical address in the logical space of the real computer, and the like. The capacity is specified, and the machine instruction transfers the capacity information from the logical address in the logical space of the real computer specified by the specifying means to the logical address in the logical space of the virtual computer.

〔Example〕

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing a virtual computer system to which the information transfer method r:( of one embodiment of the present invention is applied. This virtual 1γ machine system has a total of 11 actual machines BM and a real computer A virtual machine monitor VMM running on 8M,
Multiple virtual machine monitors (3 shown in the figure) are realized on the VMM.
Specify the virtual machines VMI, VM2, and VM3, the virtual machine number that identifies the virtual machine, the logical address in the logical space of the virtual machine, the logical address in the logical space of the real computer BM, and the capacity to be migrated. It is configured to include a general-purpose register group 3 as a specifying means, a transfer instruction execution means 4 for executing a transfer instruction, and an address translation mechanism 5 for converting a logical address into a real address. Note that 6 is a real computer logical space, 11 to 13 are virtual computer storage spaces, and 101 is a virtual computer storage space.
is real storage space, 102 is real computer storage space, 103-1
05 indicates the temporary space and the old calculator space, respectively.

FIG. 2 shows the transfer of information between the actual computer I3M (7) logical space 6 and the logical spaces 11 to 3 of the virtual machines VMI to VM3 in the information transfer method of the virtual computer system of this embodiment. FIG. 3 is a diagram illustrating an example of an instruction format of a machine instruction (transfer instruction) to be executed. Here, opc.

and C fields indicate the instruction code and instruction auxiliary code of this machine instruction, respectively, and I) I
The R field is the real computer BM and the virtual computer VM.
Indicates the transfer direction, such as which logical space of I to VM3 should be transferred to the opposite logical space (Ft I
It is W. In addition, the GRl, GRl, and GR3 fields indicate the number of each general-purpose register, and the two general-purpose registers, number indicated by GRI field 1' and number +1, contain machine number and virtual machine number in virtual counter'. A total of xi logical addresses in the logical space are stored, and the general-purpose register with the number indicated in the GR2 field contains the actual logical address of the machine BM in the logical space 6.
The transfer capacity is stored in the general-purpose register whose logical address above is the number indicated by the GR3 field.

Next, the operation of the information transfer method of the virtual computer system of this embodiment configured as described above will be explained.

Referring to FIG. 3, the real storage space 101 includes the real computer storage space 102 and the virtual computer storage space lO:)~10
Each memory space is divided into pages of a fixed capacity, and the real page is reached by following control structures such as ST and PT from the segment number and page number indicated at the logical address. For example, the total 'J7 machine BM
In the logical space 6''2, the logical address α is 5TIII and P
It points to real page 113 via T112. Also,
In the logical space 13F of the virtual iI computer VM3, the logical address β is connected to the real page 123 via 5T121 and PT122.
is pointing to. Furthermore, virtual machine storage space 103-1
05 is not defined in the logical space 6 of the real computer BM (nor the control structure -■-), so it is not defined in the virtual computer storage space 10.
All accesses to areas 3 to 105 are made using the virtual machine number 'Ji' and the logical space 11 to VM3 of virtual machine VMI-VM3.
It must be specified by a logical address on 13.

For example, when this machine command is executed on the virtual old 19 machine monitor VMM, the logical address α indicated by GR2 is transferred to real page 11 via 5TIII and PT112.
3, and on the other hand, the virtual address '13 indicated by GRI: machine VM3 and the logical address β indicated by GR1+l reach 5.
The real page 123 is reached via T121 and PT122, and the D I
A transfer is performed in the direction indicated in the R field.

As shown in FIG. 1, a'r L < means the virtual machine number of the virtual machine VMS, the logical address of the logical space 130 of the virtual machine VM3, and the general-purpose register of the general-purpose register group 3.
After the logical address and transfer capacity of the logical space 6L of the real computer BM are specified, for example, the virtual computer monitor V
When the transfer instruction is executed in MM, the transfer instruction execution means 4 of the real computer BM-1 refers to the general-purpose 1/register group 3, specifies the virtual and calculation waiting needle (γ mechanism M3, and transfers the transfer instruction to the virtual alW machine VM.
The logical address of the logical space 13+ of 3 is converted by the address translation mechanism 5 to the virtual address 11 on the old 05! ! Convert to 11=The logical addresses in the logical space 6 of the actual BM of 11 machines are converted into real addresses in the real computer storage space 102 by the address conversion mechanism 5. As a result, real page 1
13 and real page 123 are respectively specified, the transfer command execution means 4 transfers the information of the specified transfer capacity &J in the direction indicated in the I) I R field of this machine instruction.

Note that this machine instruction even includes means for specifying the virtual machine number of the virtual machine, the logical address in the logical space of the virtual computer, the logical address in the logical space of the real computer, and the transfer capacity. It is clear that the command format is not limited to that shown in FIG. 2 of the above embodiment.

〔Effect of the invention〕

As explained above, in the virtual machine JT machine system, the present invention is configured to transfer one target by a logical address in the logical space of the actual computer, and the other by a virtual machine number and a logical address in the logical space of the virtual computer. 1 transfer command that can be specified for each
This eliminates the need to attach the virtual computer storage space to the real computer's logical space, and eliminates the need for mutual information between the real computer's logical space and the virtual computer's logical space, which has conventionally occurred. This has the effect of reducing the burden of performing logical address conversion using rough hardware during transfer, and also of making the most effective use of the actual logical space of the machine.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a virtual computer system to which the information transfer method of an embodiment of the present invention is applied, and FIG. 2 is a machine instruction (transfer instruction) used in the information transfer method of the virtual computer system of this embodiment. 3 is a block diagram illustrating the allocation of real storage space to a real computer and a virtual computer in the information transfer method of the virtual computer system of this embodiment, and FIG. 4 is a diagram illustrating the prior art FIG. 2 is a block diagram showing allocation of real storage space to a real A4 computer and a virtual computer in FIG. In the figure, "C1" 3...General-purpose register group, 4...Movement instruction execution means, 5...Address translation mechanism, 6...Actual Computer logical space, 11-13...Virtual, calculation a logical space, 101
...Actual storage space, 102 ...Actual total'! i, machine memory space, 103
~105...Virtual computer storage space, 11L 12
1.131 ... Segment table, 112, 122.1
32 ・Page table, 113, 123.133 ・
・Real page, 8M...Real computer, VM1 to VM3 ・Temporary m=l computer, VMM......Virtual at) 7 machine monitors.

Claims (2)

[Claims] (1) In a virtual computer system that can run multiple virtual computers on a real computer, the virtual computer number that identifies the virtual computer, the logical address in the logical space of the virtual computer, and the logical address in the logical space of the real computer. A specification means for specifying a logical address and a capacity to be transferred, and a machine instruction for transferring capacity information from a logical address in a logical space of a virtual machine specified by this specifying means to a logical address in a logical space of a real computer. An information transfer method for a virtual computer system, comprising: (2) In a virtual computer system that can run multiple virtual computers on a real computer, the virtual computer number that identifies the virtual computer, the logical address in the logical space of the virtual computer, and the logical address in the logical space of the real computer. A specification means for specifying a logical address and a capacity to be transferred; and a machine instruction for transferring capacity information from a logical address in a logical space of a real computer specified by the specifying means to a logical address in a logical space of a virtual computer. An information transfer method for a virtual computer system, comprising: