xref: /linux/drivers/pci/pcie/Kconfig (revision 0d456bad36d42d16022be045c8a53ddbb59ee478) 
1#
2# PCI Express Port Bus Configuration
3#
4config PCIEPORTBUS
5	bool "PCI Express 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#
16config HOTPLUG_PCI_PCIE
17	tristate "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	  To compile this driver as a module, choose M here: the
24	  module will be called pciehp.
25
26	  When in doubt, say N.
27
28source "drivers/pci/pcie/aer/Kconfig"
29
30#
31# PCI Express ASPM
32#
33config PCIEASPM
34	bool "PCI Express ASPM control" if EXPERT
35	depends on PCI && PCIEPORTBUS
36	default y
37	help
38	  This enables OS control over PCI Express ASPM (Active State
39	  Power Management) and Clock Power Management. ASPM supports
40	  state L0/L0s/L1.
41
42	  ASPM is initially set up by the firmware. With this option enabled,
43	  Linux can modify this state in order to disable ASPM on known-bad
44	  hardware or configurations and enable it when known-safe.
45
46	  ASPM can be disabled or enabled at runtime via
47	  /sys/module/pcie_aspm/parameters/policy
48
49	  When in doubt, say Y.
50config PCIEASPM_DEBUG
51	bool "Debug PCI Express ASPM"
52	depends on PCIEASPM
53	default n
54	help
55	  This enables PCI Express ASPM debug support. It will add per-device
56	  interface to control ASPM.
57
58choice
59	prompt "Default ASPM policy"
60	default PCIEASPM_DEFAULT
61	depends on PCIEASPM
62
63config PCIEASPM_DEFAULT
64        bool "BIOS default"
65	depends on PCIEASPM
66	help
67	  Use the BIOS defaults for PCI Express ASPM.
68
69config PCIEASPM_POWERSAVE
70        bool "Powersave"
71	depends on PCIEASPM
72	help
73	  Enable PCI Express ASPM L0s and L1 where possible, even if the
74	  BIOS did not.
75
76config PCIEASPM_PERFORMANCE
77        bool "Performance"
78	depends on PCIEASPM
79	help
80	  Disable PCI Express ASPM L0s and L1, even if the BIOS enabled them.
81endchoice
82
83config PCIE_PME
84	def_bool y
85	depends on PCIEPORTBUS && PM_RUNTIME && EXPERIMENTAL && ACPI
86