US 11,442,732 B2 · Processor and instruction execution method

Abstract

A processor comprises a trusted execution environment and a non-trusted execution environment. The processor further comprises a common resource accessible in both the trusted execution environment and the non-trusted execution environment and an instruction processing device including circuitry configured to fetch an instruction for decoding and execute the decoded instruction. The instruction processing device includes circuitry further configured to determine consistency between a current execution environment of the processor and a resource status in response to a result from instruction decoding indicating that instruction involves access to the common resource, and load content corresponding to the current execution environment into the common resource in response to a determination that the current execution environment is inconsistent with the resource status, wherein the resource status indicates an execution environment corresponding to content in the common resource. A corresponding instruction execution method in the processor is also disclosed.

Claims28

Dependent claims

A processor comprising:

a trusted execution environment;
a non-trusted execution environment;
a common resource accessible in both the trusted execution environment and the non-trusted execution environment;
and
an instruction processing device having circuitry configured to:
fetch an instruction for decoding,
determine consistency between a current execution environment of the processor and a resource status in response to a result from decoding the instruction indicating that the instruction involves access to the common resource, and
load content corresponding to the current execution environment into the common resource if it is determined that the current execution environment is inconsistent with the resource status, wherein the resource status indicates an execution environment corresponding to content in the common resource.

5 more elements

An instruction execution method in a processor comprising a trusted execution environment, a non-trusted execution environment, and a common resource accessible in both the trusted execution environment and the non-trusted execution environment, the method comprising:

fetching an instruction for decoding;
determining consistency between a current execution environment of the processor and a resource status in response to a result from instruction decoding indicating that the instruction involves access to the common resource, wherein the resource status indicates an execution environment corresponding to content in the common resource;
and
loading content corresponding to the current execution environment into the common resource in response to a determination that the current execution environment is inconsistent with the resource status.

1 more element

A non-transitory computer readable medium that stores a set of instructions that is executable by one or more processors of an apparatus to cause the apparatus to initiate an instruction execution method in a processor comprising a trusted execution environment, a non-trusted execution environment, and a common resource accessible in both the trusted execution environment and the non-trusted execution environment, the method comprising:

fetching an instruction;
determining consistency between a current execution environment of the processor and a resource status in response to a result from instruction decoding indicating that the instruction involves access to the common resource, wherein the resource status indicates an execution environment corresponding to content in the common resource;
and
loading content corresponding to the current execution environment into the common resource in response to a determination that the current execution environment is inconsistent with the resource status.

1 more element

Dependencies are inferred from the claim text.

Processor and instruction execution method

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Processor and instruction execution method

Life of this patent

Abstract

Claims28