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In order to protect the security of hardware and software, manufacturers are also hollowing out their minds.AMD recently filed a new patent application to protect GPU memory instructions from malicious exploitation.
The technical principle is more complicated, simply speakingUtilize the system's master-slave relationship and use the instruction stream of both to check for any errors that may occur during execution.
First, the protected system converts the request from the device to a null operation instruction such as NOP (No OPeration), modifies the memory arbiter, and transmits N master and N slave global/shared instructions per clock cycle. The master request is sent to the memory system, and then the slave request is checked for errors, and then the master request is sent to the FIFO (first in first out) memory buffer, and the slave request is saved in the register.
Finally, compare the two requests from the register and FIFO buffer, and if there is an error, go back again and continue without further error.