# # 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