MEMORY ACCESS METHOD AND RELATED DEVICE

This application provides a memory access method and a related device. The method includes: A second apparatus sends a first access request to a first apparatus, where the first access request includes an identity number, a first security check value, and first information, and the first information includes a first physical address. The first apparatus receives the first access request from the second apparatus, obtains a second security check value through computation based on the identity number and the first information, and determines an access permission of the second apparatus for the first physical address based on the first security check value and the second security check value. According to embodiments of this application, a security risk caused by accessing memory space by using a physical address can be avoided.