System and method for managing expansion read-only memory and management host thereof

An expansion read-only memory (ROM) management method, comprising:

• establishing at least one address lookup table to assign at least one virtual function and at least one expansion ROM corresponding to the at least one virtual function to at least one computer host;
• providing data in at least one shadow register block corresponding to the at least one expansion ROM to the at least one computer host according to the at least one address lookup table when the at least one computer host issues a request to obtain a size of the at least one expansion ROM of the at least one virtual function;
• the at least one computer host assigning at least one memory block of the at least one computer host to the at least one expansion ROM according to the data in the at least one shadow register block;
• and
• providing data of the at least one expansion ROM to the at least one computer host according to the at least one memory block when the at least one computer host issues a request to obtain the data of the at least one expansion ROM through at least one bridge.

A management host, comprising:

• a switch comprising at least one bridge, wherein the at least one bridge is respectively coupled to at least one corresponding computer host;
• an PO virtualization device coupled to the switch and having at least one virtual function;
• and
• a management processor coupled to the switch and establishing at least one address lookup table to assign the at least one virtual function and at least one expansion ROM corresponding to the at least one virtual function to the at least one computer host, wherein
• when the at least one computer host issues a request to obtain a size of the at least one expansion ROM of the at least one virtual function, the management processor provides data in at least one shadow register block corresponding to the at least one expansion ROM to the at least one computer host according to the at least one address lookup table,
• the at least one computer host assigns at least one memory block to the at least one expansion ROM according to the data in the at least one shadow register block, wherein
• when the at least one computer host issues a request to obtain the data of the at least one expansion ROM through the at least one bridge, the management processor provides data of the at least one expansion ROM to the at least one computer host according to the at least one memory block.