Method and system for providing virtual NVRAM based on trusted execution environment

Abstract

The invention provides a method for providing a virtual NVRAM (Non-Volatile Random Access Memory) based on a trusted execution environment. The method comprises the following steps: a memory region establishment step: dividing a memory region with a preset size in the trusted execution environment as a memory region of the virtual NVRAM; a read-write operation step: enabling the virtual NVRAM to wait for a read-write request, and execute a corresponding read-write operation when receiving the read-write request; a shutdown backup step: when the device is shut down, backing up data in the virtual NVRAM divided in the trusted execution environment into a disk before the trusted execution environment is closed; and a startup reading step: when the equipment is started, firstly starting a trusted execution environment, reading the data backed up in the disk into the virtual NVRAM, and starting the virtual NVRAM. The method has the advantages that existing mobile equipment hardware is not modified, data is not lost during power failure, data in the virtual NVRAM cannot be lost when an operating system of the mobile equipment crashes or has errors, and the performance of the mobile equipment can be improved.

Description

technical field [0001] The present invention relates to the field of data reliability, in particular to a method and a system method for providing virtual NVRAM (Non-Volatile Random Access Memory, Non-Volatile Random Access Memory) for devices based on a trusted execution environment. Background technique [0002] Random access memory, referred to as memory (RAM), is an important part of a computer system and is used to store computing data in the CPU. Compared with external storage devices such as disks, RAM is characterized by high speed and small capacity, but data will be lost when power is turned off. Although the disk can store data permanently, it is very slow and not suitable for direct access by the CPU. So in mobile devices, RAM often acts as a disk cache. Software programs on mobile devices, such as Android operating systems, chat software, game software, etc., are generally installed on external storage such as disks, but these software cannot be used directly ...

AI Technical Summary

Problems solved by technology

First, due to the high cost of the existing high-speed NVRAM, it is not suitable for mobile electronic devices such as mobile phones and tablets purchased by ordinary consumers.

Second, because the energy consumption of existing NVRAM is much higher than that of existing RAM, the power supply design of existing mobile devices is not enough to support normal use time

The third is that ordinary consumers often install a large number of third-party software on mobile devices, which affects the stability of the operating system and may also lead to the loss of data in NVRAM

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