Dell products l.p. (20250094272). PCIE DPC SMI STORM PREVENTION SYSTEM
PCIE DPC SMI STORM PREVENTION SYSTEM
Organization Name
Inventor(s)
Tuyet-Huong Thi Nguyen of Cedar Park TX US
Austin Patrick Bolen of Austin TX US
PCIE DPC SMI STORM PREVENTION SYSTEM
This abstract first appeared for US patent application 20250094272 titled 'PCIE DPC SMI STORM PREVENTION SYSTEM
Original Abstract Submitted
a peripheral component interconnect express (pcie) downstream port containment (dpc) system management interrupt (smi) storm prevention system includes a basic input/output system (bios) subsystem coupled to a first pcie device. in response to an error being experienced in the first pcie device and causing the first pcie device to perform dpc operations, the bios subsystem receives a plurality of smis that are each configured to begin a system management mode (smm). the bios subsystem tracks a number of the plurality of smis in a bios database and determines when the number of the plurality of smis has reached a dpc smi storm threshold. in response to the number of the plurality of smis reaching the dpc smi storm threshold, the bios subsystem prevents use of a link to the first pcie device and prevents an operating system from performing recovery operations to recover the first pcie device from the error.
