US 2026/0072592 A1 · DEVICE ACCESS METHOD AND APPARATUS

Abstract

Embodiments of this application provide a device access method and apparatus. The method is applied to a first device. The first device includes a secure world and a non-secure world. The method includes: The first device receives first request information sent by a server, where the first request information is used to request the first device to determine a first memory address, and the first memory address corresponds to a first MMIO address in a secure world of the server; and the first device determines the first memory address in the secure world of the first device based on the first request information. According to the foregoing method, a data channel established between the server and the first device cannot be stolen by software in the non-secure world, so that a confidential computing requirement of a tenant in a heterogeneous computing architecture scenario is met.

Claims20

Dependent claims

A device access method, wherein the method is applied to a first device, the first device comprises a secure world and a non-secure world, and the method comprises:

receiving, by the first device, first request information sent by a server, wherein the first request information is used to request the first device to determine a first memory address, and the first memory address corresponds to a first memory mapped input/output (MMIO) address in a secure world of the server;
and
determining, by the first device, the first memory address in the secure world of the first device based on the first request information.

A device access apparatus, comprising a processor, wherein the processor is configured to:

be coupled to a storage, and read and execute instructions and/or program code in the storage, to cause the device access apparatus to:
receive a first request information sent by a server, wherein the first request information is used to request the first device to determine a first memory address, and the first memory address corresponds to a first memory mapped input/output (MMIO) address in a secure world of the server;
and
determine the first memory address in the secure world of the first device based on the first request information;
or
to cause the device access apparatus to
determine a first MMIO address in the secure world of the server;
send the first request information to a first device, wherein the first request information is used to request the first device to determine a first memory address in a secure world of the first device, and the first memory address corresponds to the first MMIO address;
and
access the first memory address by using the first MMIO address.

7 more elements

A non-transitory computer-readable medium, wherein the computer-readable medium stores program code, and when the computer program code is run on a computer, the computer is caused to:

receive a first request information sent by a server, wherein the first request information is used to request the first device to determine a first memory address, and the first memory address corresponds to a first memory mapped input/output (MMIO) address in a secure world of the server;
and
determine the first memory address in the secure world of the first device based on the first request information;
or
the computer is caused to
determine a first MMIO address in the secure world of the server;
send the first request information to a first device, wherein the first request information is used to request the first device to determine a first memory address in a secure world of the first device, and the first memory address corresponds to the first MMIO address;
and
access the first memory address by using the first MMIO address.

6 more elements

Dependencies are inferred from the claim text.

Device access method and apparatus

Life of this patent

Device access method and apparatus

Life of this patent

Abstract

Claims20