# # PCI Express Port Bus Configuration # config PCIEPORTBUS bool "PCI Express Port Bus support" depends on PCI help This automatically enables PCI Express Port Bus support. Users can choose Native Hot-Plug support, Advanced Error Reporting support, Power Management Event support and Virtual Channel support to run on PCI Express Ports (Root or Switch). # # Include service Kconfig here # config HOTPLUG_PCI_PCIE bool "PCI Express Hotplug driver" depends on HOTPLUG_PCI && PCIEPORTBUS help Say Y here if you have a motherboard that supports PCI Express Native Hotplug When in doubt, say N. source "drivers/pci/pcie/aer/Kconfig" # # PCI Express ASPM # config PCIEASPM bool "PCI Express ASPM control" if EXPERT depends on PCI && PCIEPORTBUS default y help This enables OS control over PCI Express ASPM (Active State Power Management) and Clock Power Management. ASPM supports state L0/L0s/L1. ASPM is initially set up by the firmware. With this option enabled, Linux can modify this state in order to disable ASPM on known-bad hardware or configurations and enable it when known-safe. ASPM can be disabled or enabled at runtime via /sys/module/pcie_aspm/parameters/policy When in doubt, say Y. config PCIEASPM_DEBUG bool "Debug PCI Express ASPM" depends on PCIEASPM default n help This enables PCI Express ASPM debug support. It will add per-device interface to control ASPM. choice prompt "Default ASPM policy" default PCIEASPM_DEFAULT depends on PCIEASPM config PCIEASPM_DEFAULT bool "BIOS default" depends on PCIEASPM help Use the BIOS defaults for PCI Express ASPM. config PCIEASPM_POWERSAVE bool "Powersave" depends on PCIEASPM help Enable PCI Express ASPM L0s and L1 where possible, even if the BIOS did not. config PCIEASPM_PERFORMANCE bool "Performance" depends on PCIEASPM help Disable PCI Express ASPM L0s and L1, even if the BIOS enabled them. endchoice config PCIE_PME def_bool y depends on PCIEPORTBUS && PM config PCIE_DPC bool "PCIe Downstream Port Containment support" depends on PCIEPORTBUS default n help This enables PCI Express Downstream Port Containment (DPC) driver support. DPC events from Root and Downstream ports will be handled by the DPC driver. If your system doesn't have this capability or you do not want to use this feature, it is safe to answer N. config PCIE_PTM bool "PCIe Precision Time Measurement support" default n depends on PCIEPORTBUS help This enables PCI Express Precision Time Measurement (PTM) support. This is only useful if you have devices that support PTM, but it is safe to enable even if you don't.