Live migration method and apparatus for virtual machine passthrough device

A live migration apparatus for a virtual machine passthrough device, the apparatus comprising:

• at least one processor;
• and
• a memory storing instructions, the instructions when executed by the at least one processor, cause the at least one processor to perform operations, the operations comprising:
• performing a register state synchronization method by calling a configured register state synchronization interface, to synchronize a register state of a source virtual machine passthrough device to a target virtual machine;
• cancelling a passthrough state of the source virtual machine passthrough device, and migrating the source virtual machine passthrough device to the target virtual machine by iteratively executing multiple rounds of a synchronization operation;
• wherein the synchronization operation comprising:
• performing the register state synchronization method by calling the configured register state synchronization interface, to capture a read/write operation on a register of the source virtual machine passthrough device in a migration process, and executing the captured read/write operation on a register of a target virtual machine passthrough device;
• and
• performing a DMA dirty page synchronization method by calling a configured DMA dirty page transmission interface, to write data corresponding to a DMA dirty page identified by the source virtual machine passthrough device into a memory of the target virtual machine.

A non-transitory computer readable storage medium, storing a computer program thereon, the computer program, when executed by a processor, cause the processor to perform operations, the operations comprising:

• performing a register state synchronization method by calling a configured register state synchronization interface, to synchronize a register state of a source virtual machine passthrough device to a target virtual machine;
• cancelling a passthrough state of the source virtual machine passthrough device, and migrating the source virtual machine passthrough device to the target virtual machine by iteratively executing multiple rounds of a synchronization operation;
• the synchronization operation comprising:
• performing the register state synchronization method by calling the configured register state synchronization interface, to capture a read/write operation on a register of the source virtual machine passthrough device in a migration process, and executing the captured read/write operation on a register of a target virtual machine passthrough device;
• and
• performing a DMA dirty page synchronization method by calling a configured DMA dirty page transmission interface, to write data corresponding to a DMA dirty page identified by the source virtual machine passthrough device into a memory of the target virtual machine.