PCIe debug实战:Surprise Down error DL_Active 跳变到 DL_Inactive(即从Physical LinkUp = 1b跳变到Physical LinkUp = 0b)。Surprise Down Error的定义强调了操作系统不知情,因此操作系统能感知的且会导致链路状态从link debug pcie error debug实战 pcied 2025-10-22 09:51 2