Computer system and method for accessing virtual machine

A computer system for accessing virtual machine, comprising:

• a host driver, installed in a host operating system;
• a virtual machine, installed in said host operating system, wherein said host operating system or a host application program is for issuing at least one access instruction, said access instruction is then transmitted to said virtual machine via said host driver, said virtual machine comprising:
• a hypervisor, comprising an expansion module, wherein said expansion module receives said access instruction, and performs a format conversion process for said access instruction so that the instruction format of said access instruction can be recognized by said virtual machine;
• and
• a guest operating system, comprising:
• a guest driver;
• a guest service program, wherein said guest driver receives said access instruction from said expansion module and transmits said access instruction to said guest service program, said guest service program will recognize that said access instruction is a read instruction, a write instruction, or a control instruction;
• and
• a first hardware driver;
• and
• a real hardware, wherein said first hardware driver is connected to said real hardware via a hardware pass-through unit, said guest service program transmits said access instruction to said real hardware via said first hardware driver and said hardware pass-through unit so as to access said real hardware, therefore obtain a second access result, and then transmit said second access result to said host operating system or said host application program.

A method for accessing virtual machine, said method being applied to a computer system that will regard said virtual machine as a system device, a peripheral device, or an application program, said computer system comprising a host operating system installed with a host driver and a virtual machine, said virtual machine comprising a hypervisor and a guest operating system, in which said hypervisor comprises an expansion module, said guest operating system comprises a guest driver, a guest service program, and a guest application program, said method comprising the following steps of:

• issuing an access instruction from said host operating system or a host application program;
• transmitting said access instruction to said virtual machine via said host driver;
• receiving said access instruction via said expansion module of said hypervisor by said virtual machine and performing a format conversion process for said access instruction by said expansion module of said hypervisor so that the instruction format of said access instruction can be recognized by said virtual machine;
• transmitting said access instruction to said guest service program via said guest driver by said expansion module of said hypervisor;
• and
• accessing said guest application program according to the indication of said access instruction by said guest service program so as to obtain a first access result and then transmit said first access result to said host operating system or said host application program.

A method for accessing virtual machine, said method being applied to a computer system that will regard said virtual machine as a system device, a peripheral device, or an application program, said computer system comprising a host operating system installed with a host driver and a virtual machine, said virtual machine comprising a hypervisor and a guest operating system, in which said hypervisor comprises an expansion module, said guest operating system comprises a guest driver, a guest service program, and a first hardware driver, said first hardware driver is connected to a real hardware via a hardware pass-through unit, said method comprising the steps of:

• issuing an access instruction from said host operating system or a host application program;
• transmitting said access instruction to said virtual machine via said host driver;
• receiving said access instruction via said expansion module of said hypervisor by said virtual machine and performing a format conversion process for said access instruction by said expansion module of said hypervisor so that the instruction format of said access instruction can be recognized by said virtual machine;
• transmitting said access instruction to said guest service program via said guest driver by said expansion module of said hypervisor;
• and
• transmitting said access instruction to said real hardware via said first hardware driver and said hardware pass-through unit by said guest service program so as to access said real hardware, therefore obtain a second access result, and then transmit said second access result to said host operating system or said host application program.