METHOD, COMPUTER SYSTEM, AND APPARATUS FOR ACCESSING PERIPHERAL COMPONENT INTERCONNECT EXPRESS ENDPOINT DEVICE

摘要

Embodiments of the present invention relate to a peripheral component interconnect express endpoint device accessing method, a computer system, and an apparatus. A state of an access request sent by a processor is monitored, and a simulation response message for the access request is sent to the processor when it is determined that the PCIe endpoint device sends no response message for the access request. Therefore, according to the simulation response message, the processor can confirm completion of the procedure corresponding to the previously sent access request, and shut down a timer for timing the access request and clear the buffered access request, thereby keeping normal processing in the processor and avoiding the MCE resetting problem that arises from accumulation of access requests in the processor.

主权项

1. A computer, comprising:
a processor, configured to obtain an operation instruction for accessing the PCIe endpoint device, and send an access request to a peripheral component interconnect express (PCIe) endpoint device according to the operation instruction; a PCIe bus, configured to connect to a PCIe endpoint device; a simulation response module, configured to monitor a state of the access request, and wherein the state of the access request comprises finished or unfinished, an unfinished state indicates that the PCIe endpoint device sends no response message for the access request; if the state of the access request is unfinished when a preset trigger condition is fulfilled, obtain a simulation response message for the access request, and send the simulation response message to the processor.