Method for Managing Memory of Virtual Machine, Physical Host, PCIE Device and Configuration Method Thereof, and Migration Management Device

A method for configuring a Peripheral Component Interconnect Express (PCIE) device, comprising:

• receiving, by a PCIE device, an address of a base address table (BAT) on each virtual machine and a function number corresponding to each virtual machine, wherein the PCIE device is connected to a physical host, one or more virtual machines run on the physical host, the PCIE device is a hardware device that supports the single-root I/O virtualization (SR-IOV) standard, and the PCIE device has a physical function (PF) and a virtual function (VF), wherein a unique function number is configured for each PF and each VF separately, wherein each virtual machine comprises the BAT, wherein the BAT is generated by a virtual machine, to which the BAT belongs, according to a memory allocated to one or more services carried on the PCIE device, the memory allocated to each service comprises a plurality of memory blocks, each of the plurality of memory blocks is used to save working information of a corresponding service, each memory block is a section of memory space in which guest physical addresses are consecutive, the BAT comprises a chip logic address table (CLAT) entry base address corresponding to each service, and a CLAT comprises a first address of each memory block;
• and
• saving a correspondence between the address of the BAT and the function number into a virtual machine configuration table (VCT).

A physical host, configured to:

• allocate a memory to one or more services carried on a Peripheral Component Interconnect Express (PCIE) device, wherein the memory allocated to each service comprises a plurality of memory blocks, each of the plurality of memory blocks is used to save working information of a corresponding service, and each memory block is a section of memory space in which guest physical addresses are consecutive, wherein a virtual machine runs on the physical host, the physical host is connected to the PCIE device, the PCIE device is a hardware device that supports the single-root I/O virtualization (SR-IOV) standard, and the PCIE device has at least one physical function (PF) and at least one virtual function (VF), wherein a unique function number is configured for each PF and each VF separately;
• generate a base address table (BAT) and a chip logic address table (CLAT) according to the memory allocated to each service, wherein the BAT comprises a CLAT entry base address corresponding to each service, and the CLAT comprises a first address of each memory block;
• and
• send an address of the BAT and a function number corresponding to the virtual machine to the PCIE device.