Computer System, Method for Accessing Peripheral Component Interconnect Express Endpoint Device, and Apparatus

摘要

A computer system and a method are provided for accessing a peripheral component interconnect express (PCIe) endpoint device. The computer system includes a processor, a PCIe bus, and an access proxy. The access proxy connects to the processor and the PCIe endpoint device; the processor acquires an operation instruction, where the operation instruction instructs the processor to access the PCIe endpoint device through the access proxy, and send an access request to the access proxy according to the operation instruction; and the access proxy sends a response message of the access request to the processor after receiving the access request sent by the processor. Because the processor does not directly access the PCIe endpoint device to be accessed but completes access through the access proxy, thereby avoiding a machine check exception (MCE) reset for the processor.

主权项

1. An access proxy, wherein the access proxy applies to a computer system, wherein the computer system comprises a processor and a peripheral component interconnect express (PCIe) bus, wherein the PCIe bus connects to at least one PCIe endpoint device, wherein the access proxy connects to the processor and the PCIe endpoint device, and wherein the access proxy is configured to:
receive a request for accessing the PCIe endpoint device from the processor; and return a response message of the access request to the processor regardless of whether access to the PCIe endpoint device is successful, to prevent the processor from generating a machine check exception (MCE) reset.