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Linux/drivers/pci/pcie/Kconfig

  1 #
  2 # PCI Express Port Bus Configuration
  3 #
  4 config PCIEPORTBUS
  5         bool "PCI Express Port Bus support"
  6         depends on PCI
  7         help
  8           This automatically enables PCI Express Port Bus support. Users can
  9           choose Native Hot-Plug support, Advanced Error Reporting support,
 10           Power Management Event support and Virtual Channel support to run
 11           on PCI Express Ports (Root or Switch).
 12 
 13 #
 14 # Include service Kconfig here
 15 #
 16 config HOTPLUG_PCI_PCIE
 17         bool "PCI Express Hotplug driver"
 18         depends on HOTPLUG_PCI && PCIEPORTBUS
 19         help
 20           Say Y here if you have a motherboard that supports PCI Express Native
 21           Hotplug
 22 
 23           When in doubt, say N.
 24 
 25 source "drivers/pci/pcie/aer/Kconfig"
 26 
 27 #
 28 # PCI Express ASPM
 29 #
 30 config PCIEASPM
 31         bool "PCI Express ASPM control" if EXPERT
 32         depends on PCI && PCIEPORTBUS
 33         default y
 34         help
 35           This enables OS control over PCI Express ASPM (Active State
 36           Power Management) and Clock Power Management. ASPM supports
 37           state L0/L0s/L1.
 38 
 39           ASPM is initially set up by the firmware. With this option enabled,
 40           Linux can modify this state in order to disable ASPM on known-bad
 41           hardware or configurations and enable it when known-safe.
 42 
 43           ASPM can be disabled or enabled at runtime via
 44           /sys/module/pcie_aspm/parameters/policy
 45 
 46           When in doubt, say Y.
 47 
 48 config PCIEASPM_DEBUG
 49         bool "Debug PCI Express ASPM"
 50         depends on PCIEASPM
 51         default n
 52         help
 53           This enables PCI Express ASPM debug support. It will add per-device
 54           interface to control ASPM.
 55 
 56 choice
 57         prompt "Default ASPM policy"
 58         default PCIEASPM_DEFAULT
 59         depends on PCIEASPM
 60 
 61 config PCIEASPM_DEFAULT
 62         bool "BIOS default"
 63         depends on PCIEASPM
 64         help
 65           Use the BIOS defaults for PCI Express ASPM.
 66 
 67 config PCIEASPM_POWERSAVE
 68         bool "Powersave"
 69         depends on PCIEASPM
 70         help
 71           Enable PCI Express ASPM L0s and L1 where possible, even if the
 72           BIOS did not.
 73 
 74 config PCIEASPM_PERFORMANCE
 75         bool "Performance"
 76         depends on PCIEASPM
 77         help
 78           Disable PCI Express ASPM L0s and L1, even if the BIOS enabled them.
 79 endchoice
 80 
 81 config PCIE_PME
 82         def_bool y
 83         depends on PCIEPORTBUS && PM
 84 
 85 config PCIE_DPC
 86         tristate "PCIe Downstream Port Containment support"
 87         depends on PCIEPORTBUS
 88         default n
 89         help
 90           This enables PCI Express Downstream Port Containment (DPC)
 91           driver support.  DPC events from Root and Downstream ports
 92           will be handled by the DPC driver.  If your system doesn't
 93           have this capability or you do not want to use this feature,
 94           it is safe to answer N.
 95 
 96           To compile this driver as a module, choose M here: the module
 97           will be called pcie-dpc.

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