CN102402453A - System virtual machine for microprocessor without interlocked piped stages (MIPS) platform - Google Patents
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Abstract
The invention aims at the problem that a microprocessor without interlocked piped stages (MIPS) platform is not assisted and supported by hardware, discloses a virtual machine for the MIPS platform by using a lightweight virtualization technology, and provides high-efficiency virtualization infrastructure support for upper-layer application. Modules of the virtual machine mainly comprise physical hardware, a host operating system (OS), a virtual machine inner core, virtual hardware, an equipment model, a client OS and a host quick emulator (QEMU) process. Execution modes of the virtual machine mainly comprise a management mode, an inner core mode and a user mode. According to an application request, by adoption of the virtual machine, the technical problem that an MIPS processor is not assisted and supported by the hardware is solved; and by adoption of a lightweight inner core virtual machine technology, virtualization application requirements in the embedded field can be met, and the virtualization application requirements in the field of servers can be also met. Therefore, the virtual machine has the characteristics of light weight, wide application prospect, remarkable economic benefit and the like.
Description
(1) technical field
The invention discloses a kind of system virtual machine; Relate in particular to a kind of system virtual machine towards the MIPS platform (English is abbreviated as MIPSVM), MIPS refers to " not having the microprocessor of inner interlocking pipelining-stage " (Microprocessor without interlocked piped stages).Belong to field of computer technology.
(2) background technology
System virtualizationization is the research direction that Computer Systems Organization combines with computer system software.It is through increasing monitor of virtual machine (Virtual Machine Monitor, be called for short VMM) between computer system hardware and operating system, the physical resource of computer system is carried out abstract, isolates the tight dependence between hardware system structure and the software; Through multiple physical resources such as the CPU of dynamic organization, internal memory, I/O, make up the virtual machine of a plurality of mutual isolation flexibly, satisfy diversified application demand; Through the time between the excavation application and the concurrency in space, improve the utilization factor of resource.
Intel Virtualization Technology proposes in the sixties in 20th century first, mainly is in order large scale computer hardware to be carried out subregion to improve the hardware utilization factor at that time.In the eighties in 20th century and the nineties, because client-server application program and cheap x86 server and the development of desktop computer, when distributed computing technology was increasingly mature, Intel Virtualization Technology had made no public appearances at that time basically.The nineties in 20th century Windows be widely used and Linux as the appearance of server OS, the industry standard status of having established the x86 server.Along with the growth that x86 server and desktop are disposed, brought newly like an IT infrastructure and running difficult problems such as retractility, dirigibility and poor reliability, this makes Intel Virtualization Technology obtain recovery in recent years.In recent years along with the popularization day by day of cloud computing, the advantage of Intel Virtualization Technology on commercial application embodies day by day.Virtual enterprise's traditional I T infrastructure deployment and the way to manage of having changed significantly improved retractility, dirigibility and the reliability of infrastructure.Its notion has been deep in enterprise even everyone daily work and the life, becomes one of technology with fastest developing speed in the present global software industry.
In recent years; Develop rapidly along with the MIPS cpu performance; The application of MIPS CPU has been not limited only to traditional embedded system field; The high performance MIPS CPU of part also is applied in the commercial server gradually, and also promptly embedded still server field is all to the expansion day by day of MIPS platform and virtualization applications demand thereof.Along with since the Intel Virtualization Technology fast development, comprised the flush bonding processor field of MIPS architecture processor on the other hand, Intel Virtualization Technology has been proposed new demand.Yet, through to X86, PowerPC (PPC), the contrast (table 1) of MIPS etc. can find out that MIPS CPU exists urgent
Table 1
Problem such as need to solve virtual leak and support hardware is not auxiliary virtual, this makes and faces technological challenge towards MIPS Platform Implementation system virtual machine.As do not have the support of appropriate Intel Virtualization Technology, will bring huge resistance embedded with popularization server market to MIPS CPU.The MIPS processor wants in embedded system, and especially server market takies prior one seat, and Intel Virtualization Technology is especially very urgent with the technological breakthrough of the auxiliary support issue of no hardware towards its virtual leak.
The system virtual machine research relevant with the present invention is concluded and is got up can comprise two aspects progress; The system-oriented design of virtual machine with realize that (like one Chinese patent application number is 200610139664.1 to gordian technique, and name is called " a kind of dummy machine system and CPU dispatching method thereof "; The Chinese patent publication number is CN1740989; Name is called " general-purpose built-in type system virtualization page attribute management method "); Key application based on system virtual machine is technological, and (like the Chinese patent publication number is CN102194080A, and name is called " a kind of rootkit testing mechanism and detection method based on kernel virtual machine "; One Chinese patent application number is 02137511.9, and name is called " a kind of virtual machine that is used for embedded systemic software development "; The Chinese patent publication number is CN102243571A, and name is called " a kind of many forms towards embedded Hypervisor show the virtualization operations method ").Realize seeing that representational system comprises the virtualization system DISCO based on MIPS R10000 processor that Stanford University developed in 1997 from virtualization system, and the system software platform OKL4 that increases income that developed of Open Kernel Labs.But sum up existing result of study and realization system; Existing research and invention exist following trend and problem: on architecture; Major part is design, realization and the invention of improvement gordian technique that proposes towards architecture platforms such as X86; In the invention of embedded system platform, virtual machine application technology (virtual machine technique is auxiliary to be realized virtual many form demonstrations and detect [3] [5] etc. as utilizing) is on the high side.Intel Virtualization Technology proposed in the 60-70 age; Basically make no public appearances in the 80-90 age, revive once more, and the system-level virtual machine of main employing in early stage weight is (like QEMU up to the nineties; XEN etc.), there is the bigger problem of performance cost in the system virtual machine based on the heavyweight virtual machine.And along with the popularization of virtual machine range of application, the operating system grade/kernel level virtual machine (like KVM, OPENVZ etc.) of light weight obtains increasingly extensive attention in the recent period.As far as the MIPS platform; At present less relatively towards the system virtualization Study on Technology of MIPS platform; Especially towards its no hardware auxiliary problem (AP), lack based on the research and the invention of the system virtual machine overall architecture design of lightweight virtual machine (kernel virtual machine KVM) and gordian technique thereof (CPU is virtual, internal memory virtualization and IO are virtual etc.).
(3) summary of the invention
1, purpose
The purpose of this invention is to provide a kind of system virtual machine towards the MIPS platform; Assist problems such as support with no hardware to the virtual leak of MIPS platform; It has realized a kind of system virtual machine system towards the MIPS platform based on lightweight kernel virtual machine KVM, for the upper strata virtualization applications provides the system software support.
2, technical scheme
Technical scheme of the present invention is following: a kind of system virtual machine towards the MIPS platform, realize based on KVM, and adopt host's model framework, on module constitutes, mainly comprise:
(1) physical hardware: physical hardware further comprises physical cpu, physical memory, physics peripheral hardware.Physical hardware is the hardware infrastructure of total system virtual machine.
(2) host OS: host OS is that physical hardware provides OS.
(3) virtual machine kernel: the virtual machine kernel further comprises CPU virtualization subsystem, internal memory virtualization subsystem and I/O virtualization subsystem.
(4) virtual hardware: virtual hardware further comprises virtual cpu, virtual memory, virtual peripheral.Virtual hardware is the important output of total system virtual machine, for upper strata client OS and virtualization applications provide the virtual hardware support.
(5) device model: device model provides equipment for host QEMU process.
(6) client OS: client OS is the middleware of upper strata client application and virtual hardware.
(7) host QEMU process: host QEMU process is an amended QEMU of process, and it runs on the user's space of host operating system, mainly contains two effects: 1) as the user's space operation-interface of virtual machine kernel.
2) assist the virtual machine kernel to accomplish the I/O virtualized tasks.
Based on constituting with upper module, the present invention has announced a kind of system virtual machine execution pattern towards the MIPS platform.The execution pattern of being invented has increased a kind of management mode on the basis of two kinds of execution patterns (user model and kernel mode) of original (SuSE) Linux OS.Be that a kind of system virtual machine execution pattern towards the MIPS platform mainly comprises three kinds of execution patterns:
(1) management mode: management mode is used to carry out the client computer kernel code of non-I/O.
(2) kernel mode: kernel mode is used to be implemented to the switching of management mode, and handles code or special instruction that those withdraw from from management mode owing to the I/O operation, and the virtual machine kernel is operated under this pattern.
(3) user model: user model is used to carry out the personal code work of client computer, and host QEMU process also operates under this pattern simultaneously.
Based on constituting with upper module and execution pattern, on core algorithm, the present invention has announced a kind of system virtual machine implementation method towards the MIPS platform, mainly comprises following several steps:
(1) step S1: the host QEMU process under the user model gets into kernel mode through system call.
(2) step S2: in the kernel mode, the virtual machine kernel is virtual machine creating and initialization virtual cpu and virtual memory, returns user model then.
(3) step S3: the host QEMU process under the user model gets into kernel mode once more through system call.
(4) step S4: in the kernel mode, at first implementation step S41, implementation step S42 then.Step S41 and step S42 implementation content are following:
A) step S41: the virtual machine kernel is prepared the running environment of client computer, is written into client code.
B) step S42: according to residing operator scheme before withdrawing from last time, corresponding management mode or the user model of switching to.
(5) step S5: judge whether the client code implementation takes place unusually; As take place unusual, execution in step S6 then.
(6) step S6: get into the virtual machine kernel execute exception that runs on kernel mode and handle operation, carry out S7 after the abnormality processing.
(7) step S7: carry out the I/O visit and judge, if right and wrong I/O visit, execution in step S8.If S10 is carried out in the I/O visit.
A) step S8: execution in step S9 and execution in step S42 promptly finally get into the client code operation again.
B) step S9: internal memory virtualization.
(8) step S10: be withdrawn into the Simulation execution that host QEMU process is carried out the I/O visit, get into the client computer operation after being finished once more.
3, advantage and effect
The system virtual machine that the present invention announced towards the MIPS platform, it compared with prior art, its main advantage is: (1) owing to develop based on the kernel level virtual machine, system has the advantage of lightweight.(2) because all there is the auxiliary problem of supporting of no hardware in existing MIPS processor major part; And MIPS handles in recent years the continuous lifting along with performance; From traditional towards built-in field; Gradually by trial and employings such as server fields, so the present invention has very strong practicality and very wide range of application.
(4) accompanying drawing table explanation
Fig. 1 system virtual machine overall framework synoptic diagram towards the MIPS platform of the present invention
Fig. 2 system virtual machine schematic flow sheet towards the MIPS platform of the present invention
Among the figure:
1, physical hardware, 101, physical cpu, 102, physical memory, 103, the physics peripheral hardware
2, host OS, 3, the virtual machine kernel, 4, the CPU virtualization subsystem, 5, the internal memory virtualization subsystem
6, I/O virtualization subsystem 7, virtual cpu, 8, virtual memory, 9, virtual peripheral
10, virtual hardware, 11, device model, 12, client OS, 13, host QEMU process
(5) embodiment
For making the object of the invention, technical scheme and advantage express clearlyer, the present invention is remake further detailed explanation below in conjunction with accompanying drawing and specific embodiment.With Godson 3A (a kind of typical MIPS platform), shown in Figure 2 like Fig. 1, a kind of system virtual machine towards the MIPS platform, the practical implementation method is following:
On module constituted, a kind of system virtual machine towards the MIPS platform mainly comprised:
(1) physical hardware 1: physical hardware 1 further comprises physical cpu 101, physical memory 102, physics peripheral hardware 103.Physical hardware 1 is the hardware infrastructure of total system virtual machine.
(2) host OS 2: host OS 2 provides OS for physical hardware 1.
(3) the virtual machine kernel 3: virtual machine kernel 3 further comprises CPU virtualization subsystem 4, internal memory virtualization subsystem 5 and I/O virtualization subsystem 6.Virtual machine kernel 3 is cores of total system virtual machine; It is responsible for establishment, destruction, the scheduling of virtual machine; The distribution of virutal machine memory, management; For virtual machine provides the virtual abstract of physical cpu, physical memory and I/O equipment, simultaneously with the collaborative simulation of accomplishing I/O equipment of the device model of host QEMU process.
(4) virtual hardware 10: virtual hardware 10 further comprises virtual cpu 7, virtual memory 8, virtual peripheral 9.Virtual hardware 10 is the important output of total system virtual machine, for upper strata client OS12 and virtualization applications provide the virtual hardware support.
(5) device model 11: device model provides equipment for host QEMU process.
(6) client OS12: client OS is the middleware of upper strata client application and virtual hardware.
(7) host QEMU process 13: host QEMU process is an amended QEMU of process, and it runs on the user's space of host operating system, mainly contains two effects: 1) as the user's space operation-interface of kernel.The virtual machine kernel is the core towards the system virtual machine of MIPS platform, supplies the user's space visit through character device/dev/kvm/.Because kernel not directly uses,, come with kernel mutual so need the instrument of a user's space.Host QEMU process has just been played the part of the instrument of this user's space, makes the user can operate each function in the kernel easily.2) assist kernel to accomplish the I/O virtualized tasks.QEMU itself is a powerful system-level simulator, has the system-wide ability of simulation, and its device model can be simulated multiple common peripheral hardware, and the device model scientific research that makes full use of QEMU efficiently realizes the management and the visit of equipment compactly.
Based on constituting with upper module, in this instance, a kind of system virtual machine execution pattern towards the MIPS platform mainly comprises three kinds of execution patterns:
(1) management mode (Mod1): management mode is used to carry out the client computer kernel code of non-I/O.
(2) kernel mode (Mod3): kernel mode is used to be implemented to the switching of management mode, and handles code or special instruction that those withdraw from from management mode owing to the I/O operation, and the virtual machine kernel is operated under this pattern.
(3) user model (Mod2): user model is used to carry out the personal code work of client computer, and host QEMU process also operates under this pattern simultaneously.
Based on constituting with upper module and execution pattern, on core algorithm, in this instance, a kind of system virtual machine implementation method towards the MIPS platform mainly comprises following several steps:
(1) step S1: the host QEMU process under the user model gets into kernel mode through the IOCTL system call.
(2) step S2: in the kernel mode, the virtual machine kernel is virtual machine creating and initialization virtual cpu and virtual memory, returns user model then.
(3) step S3: the host QEMU process under the user model gets into kernel mode once more through the IOCTL system call.
(4) step S4: in the kernel mode, at first implementation step S41, implementation step S42 then.Step S41 and step S42 implementation content are following:
A) step S41: the virtual machine kernel is prepared the running environment of client computer, is written into client code.
B) step S42: according to residing operator scheme before withdrawing from last time, corresponding management mode or the user model of switching to.
(5) step S5: judge whether the client code implementation takes place unusually; As take place unusual, execution in step S6 then.
(6) step S6: get into the virtual machine kernel execute exception that runs on kernel mode and handle operation, carry out S7 after the abnormality processing.
(7) step S7: carry out the I/O visit and judge, if right and wrong I/O visit, execution in step S8.If S10 is carried out in the I/O visit.
A) step S8: execution in step S9 and execution in step S42 promptly finally get into the client code operation again.
B) step S9: carry out internal memory virtualization.
(8) step S10: be withdrawn into the Simulation execution that host QEMU process is carried out the I/O visit, get into the client computer operation through IOCTL once more after being finished.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only; Although the present invention is specified with reference to the foregoing description; Those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention; And replace any modification or the part that do not break away from the spirit and scope of the present invention, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (2)
1. the system virtual machine towards the MIPS platform is realized based on KVM, adopts host's model framework, and it is characterized in that: this virtual machine mainly comprises:
(1) physical hardware: physical hardware further comprises physical cpu, physical memory, physics peripheral hardware; Physical hardware is the hardware infrastructure of total system virtual machine;
(2) host OS: host OS is that physical hardware provides OS;
(3) virtual machine kernel: the virtual machine kernel further comprises CPU virtualization subsystem, internal memory virtualization subsystem and I/O virtualization subsystem; The virtual machine kernel is the core of total system virtual machine; It is responsible for establishment, destruction, the scheduling of virtual machine; The distribution of virutal machine memory, management; For virtual machine provides the virtual abstract of physical cpu, physical memory and I/O equipment, simultaneously with the collaborative simulation of accomplishing I/O equipment of the device model of host QEMU process;
(4) virtual hardware: virtual hardware further comprises virtual cpu, virtual memory, virtual peripheral; Virtual hardware is the important output of total system virtual machine, for upper strata client OS and virtualization applications provide the virtual hardware support;
(5) device model: device model provides equipment for host QEMU process;
(6) client OS: client OS is the middleware of upper strata client application and virtual hardware;
(7) host QEMU process: host QEMU runs on the user's space of host operating system, mainly contains two effects: 1) as the user's space operation-interface of virtual machine kernel; 2) assist the virtual machine kernel to accomplish the I/O virtualized tasks.
2. the implementation method of a kind of system virtual machine towards the MIPS platform as claimed in claim 1; This implementation method is based on a kind of system virtual machine execution pattern towards the MIPS platform; This execution pattern is on the basis of the user model of original (SuSE) Linux OS and two kinds of execution patterns of kernel mode; Increased a kind of management mode, promptly a kind of system virtual machine execution pattern towards the MIPS platform mainly comprises three kinds of execution patterns: (1) management mode: management mode is used to carry out the client computer kernel code of non-I/O; (2) kernel mode: kernel mode is used to be implemented to the switching of management mode, and handles code or special instruction that those withdraw from from management mode owing to the I/O operation, and the virtual machine kernel is operated under this pattern; (3) user model: user model is used to carry out the personal code work of client computer, and host QEMU process also operates under this pattern simultaneously;
Based on above execution pattern, a kind of system virtual machine implementation method towards the MIPS platform mainly comprises following several steps:
Step S1: the host QEMU process under the user model gets into kernel mode through system call;
Step S2: in the kernel mode, the virtual machine kernel is virtual machine creating and initialization virtual cpu and virtual memory, returns user model then;
Step S3: the host QEMU process under the user model gets into kernel mode once more through system call;
Step S4: in the kernel mode, at first implementation step S41, implementation step S42 then; Step S41 and step S42 implementation content are following:
Step S41: the virtual machine kernel is prepared the running environment of client computer, is written into client code;
Step S42:, correspondingly switch to management mode or user according to residing operator scheme before withdrawing from last time
Pattern;
Step S5: judge whether the client code implementation takes place unusually; As take place unusual, execution in step S6 then;
Step S6: get into the virtual machine kernel execute exception that runs on kernel mode and handle operation, carry out S7 after the abnormality processing;
Step S7: carry out the I/O visit and judge, if right and wrong I/O visit, execution in step S8.If S10 is carried out in the I/O visit;
Step S8: execution in step S9 and execution in step S42 promptly finally get into the client code operation again;
Step S9: internal memory virtualization;
Step S10: be withdrawn into the Simulation execution that host QEMU process is carried out the I/O visit, get into the client computer operation after being finished once more.
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| CN107533575A (en) * | 2015-04-29 | 2018-01-02 | 西门子公司 | The method for for area of computer aided developing the total system being made up of subsystem |
| CN105631321B (en) * | 2015-12-24 | 2019-05-21 | 北京奇虎科技有限公司 | A kind of detection method and device of virtual machine process information |
| CN110178117A (en) * | 2017-02-24 | 2019-08-27 | 株式会社东芝 | Control device |
| CN110178117B (en) * | 2017-02-24 | 2023-06-02 | 株式会社东芝 | Control device |
| CN109460280A (en) * | 2017-09-06 | 2019-03-12 | 中兴通讯股份有限公司 | Run method, the terminal of program |
| CN109460280B (en) * | 2017-09-06 | 2023-06-30 | 中兴通讯股份有限公司 | Method and terminal for running program |
| CN109522087A (en) * | 2018-09-13 | 2019-03-26 | 上海交通大学 | Processor-based Imaginary Mechanism construction method and system |
| CN109522087B (en) * | 2018-09-13 | 2020-07-28 | 上海交通大学 | Virtual mechanism building method and system based on domestic Shenwei processor |
| CN112596921A (en) * | 2020-12-17 | 2021-04-02 | 海光信息技术股份有限公司 | System call processing method and processing device |
| CN112905185A (en) * | 2021-01-25 | 2021-06-04 | 浙江大学 | Embedded Linux kernel dynamic analysis platform based on QEMU |
| CN112905185B (en) * | 2021-01-25 | 2023-10-31 | 浙江大学 | QEMU-based embedded Linux kernel dynamic analysis platform |
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