1#
  2# PCI configuration
  3#
  4config ARCH_SUPPORTS_MSI
  5	bool
  6	default n
 
 
 
  7
  8config PCI_MSI
  9	bool "Message Signaled Interrupts (MSI and MSI-X)"
 10	depends on PCI
 11	depends on ARCH_SUPPORTS_MSI
 12	help
 13	   This allows device drivers to enable MSI (Message Signaled
 14	   Interrupts).  Message Signaled Interrupts enable a device to
 15	   generate an interrupt using an inbound Memory Write on its
 16	   PCI bus instead of asserting a device IRQ pin.
 17
 18	   Use of PCI MSI interrupts can be disabled at kernel boot time
 19	   by using the 'pci=nomsi' option.  This disables MSI for the
 20	   entire system.
 21
 22	   If you don't know what to do here, say Y.
 23
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 24config PCI_DEBUG
 25	bool "PCI Debugging"
 26	depends on PCI && DEBUG_KERNEL
 27	help
 28	  Say Y here if you want the PCI core to produce a bunch of debug
 29	  messages to the system log.  Select this if you are having a
 30	  problem with PCI support and want to see more of what is going on.
 31
 32	  When in doubt, say N.
 33
 34config PCI_REALLOC_ENABLE_AUTO
 35	bool "Enable PCI resource re-allocation detection"
 36	depends on PCI
 
 37	help
 38	  Say Y here if you want the PCI core to detect if PCI resource
 39	  re-allocation needs to be enabled. You can always use pci=realloc=on
 40          or pci=realloc=off to override it.  Note this feature is a no-op
 41          unless PCI_IOV support is also enabled; in that case it will
 42          automatically re-allocate PCI resources if SR-IOV BARs have not
 43          been allocated by the BIOS.
 44
 45	  When in doubt, say N.
 46
 47config PCI_STUB
 48	tristate "PCI Stub driver"
 49	depends on PCI
 50	help
 51	  Say Y or M here if you want be able to reserve a PCI device
 52	  when it is going to be assigned to a guest operating system.
 53
 54	  When in doubt, say N.
 55
 56config XEN_PCIDEV_FRONTEND
 57        tristate "Xen PCI Frontend"
 58        depends on PCI && X86 && XEN
 59        select HOTPLUG
 60        select PCI_XEN
 61	select XEN_XENBUS_FRONTEND
 62        default y
 63        help
 64          The PCI device frontend driver allows the kernel to import arbitrary
 65          PCI devices from a PCI backend to support PCI driver domains.
 66
 67config HT_IRQ
 68	bool "Interrupts on hypertransport devices"
 69	default y
 70	depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
 71	help
 72	   This allows native hypertransport devices to use interrupts.
 73
 74	   If unsure say Y.
 
 75
 76config PCI_ATS
 77	bool
 78
 79config PCI_IOV
 80	bool "PCI IOV support"
 81	depends on PCI
 82	select PCI_ATS
 83	help
 84	  I/O Virtualization is a PCI feature supported by some devices
 85	  which allows them to create virtual devices which share their
 86	  physical resources.
 87
 88	  If unsure, say N.
 89
 90config PCI_PRI
 91	bool "PCI PRI support"
 92	depends on PCI
 93	select PCI_ATS
 94	help
 95	  PRI is the PCI Page Request Interface. It allows PCI devices that are
 96	  behind an IOMMU to recover from page faults.
 97
 98	  If unsure, say N.
 99
100config PCI_PASID
101	bool "PCI PASID support"
102	depends on PCI
103	select PCI_ATS
104	help
105	  Process Address Space Identifiers (PASIDs) can be used by PCI devices
106	  to access more than one IO address space at the same time. To make
107	  use of this feature an IOMMU is required which also supports PASIDs.
108	  Select this option if you have such an IOMMU and want to compile the
109	  driver for it into your kernel.
110
111	  If unsure, say N.
112
113config PCI_IOAPIC
114	tristate "PCI IO-APIC hotplug support" if X86
115	depends on PCI
116	depends on ACPI
117	depends on HOTPLUG
118	default !X86
119
120config PCI_LABEL
121	def_bool y if (DMI || ACPI)
 
122	select NLS

  1# SPDX-License-Identifier: GPL-2.0
  2#
  3# PCI configuration
  4#
  5
  6source "drivers/pci/pcie/Kconfig"
  7
  8config PCI_BUS_ADDR_T_64BIT
  9	def_bool y if (ARCH_DMA_ADDR_T_64BIT || 64BIT)
 10	depends on PCI
 11
 12config PCI_MSI
 13	bool "Message Signaled Interrupts (MSI and MSI-X)"
 14	depends on PCI
 15	select GENERIC_MSI_IRQ
 16	help
 17	   This allows device drivers to enable MSI (Message Signaled
 18	   Interrupts).  Message Signaled Interrupts enable a device to
 19	   generate an interrupt using an inbound Memory Write on its
 20	   PCI bus instead of asserting a device IRQ pin.
 21
 22	   Use of PCI MSI interrupts can be disabled at kernel boot time
 23	   by using the 'pci=nomsi' option.  This disables MSI for the
 24	   entire system.
 25
 26	   If you don't know what to do here, say Y.
 27
 28config PCI_MSI_IRQ_DOMAIN
 29	def_bool ARC || ARM || ARM64 || X86
 30	depends on PCI_MSI
 31	select GENERIC_MSI_IRQ_DOMAIN
 32
 33config PCI_QUIRKS
 34	default y
 35	bool "Enable PCI quirk workarounds" if EXPERT
 36	depends on PCI
 37	help
 38	  This enables workarounds for various PCI chipset bugs/quirks.
 39	  Disable this only if your target machine is unaffected by PCI
 40	  quirks.
 41
 42config PCI_DEBUG
 43	bool "PCI Debugging"
 44	depends on PCI && DEBUG_KERNEL
 45	help
 46	  Say Y here if you want the PCI core to produce a bunch of debug
 47	  messages to the system log.  Select this if you are having a
 48	  problem with PCI support and want to see more of what is going on.
 49
 50	  When in doubt, say N.
 51
 52config PCI_REALLOC_ENABLE_AUTO
 53	bool "Enable PCI resource re-allocation detection"
 54	depends on PCI
 55	depends on PCI_IOV
 56	help
 57	  Say Y here if you want the PCI core to detect if PCI resource
 58	  re-allocation needs to be enabled. You can always use pci=realloc=on
 59	  or pci=realloc=off to override it.  It will automatically
 60	  re-allocate PCI resources if SR-IOV BARs have not been allocated by
 61	  the BIOS.
 
 62
 63	  When in doubt, say N.
 64
 65config PCI_STUB
 66	tristate "PCI Stub driver"
 67	depends on PCI
 68	help
 69	  Say Y or M here if you want be able to reserve a PCI device
 70	  when it is going to be assigned to a guest operating system.
 71
 72	  When in doubt, say N.
 73
 74config XEN_PCIDEV_FRONTEND
 75        tristate "Xen PCI Frontend"
 76        depends on PCI && X86 && XEN
 
 77        select PCI_XEN
 78	select XEN_XENBUS_FRONTEND
 79        default y
 80        help
 81          The PCI device frontend driver allows the kernel to import arbitrary
 82          PCI devices from a PCI backend to support PCI driver domains.
 83
 84config PCI_ATS
 85	bool
 
 
 
 
 86
 87config PCI_ECAM
 88	bool
 89
 90config PCI_LOCKLESS_CONFIG
 91	bool
 92
 93config PCI_IOV
 94	bool "PCI IOV support"
 95	depends on PCI
 96	select PCI_ATS
 97	help
 98	  I/O Virtualization is a PCI feature supported by some devices
 99	  which allows them to create virtual devices which share their
100	  physical resources.
101
102	  If unsure, say N.
103
104config PCI_PRI
105	bool "PCI PRI support"
106	depends on PCI
107	select PCI_ATS
108	help
109	  PRI is the PCI Page Request Interface. It allows PCI devices that are
110	  behind an IOMMU to recover from page faults.
111
112	  If unsure, say N.
113
114config PCI_PASID
115	bool "PCI PASID support"
116	depends on PCI
117	select PCI_ATS
118	help
119	  Process Address Space Identifiers (PASIDs) can be used by PCI devices
120	  to access more than one IO address space at the same time. To make
121	  use of this feature an IOMMU is required which also supports PASIDs.
122	  Select this option if you have such an IOMMU and want to compile the
123	  driver for it into your kernel.
124
125	  If unsure, say N.
126
 
 
 
 
 
 
 
127config PCI_LABEL
128	def_bool y if (DMI || ACPI)
129	depends on PCI
130	select NLS
131
132config PCI_HYPERV
133        tristate "Hyper-V PCI Frontend"
134        depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64
135        help
136          The PCI device frontend driver allows the kernel to import arbitrary
137          PCI devices from a PCI backend to support PCI driver domains.
138
139source "drivers/pci/hotplug/Kconfig"
140source "drivers/pci/cadence/Kconfig"
141source "drivers/pci/dwc/Kconfig"
142source "drivers/pci/host/Kconfig"
143source "drivers/pci/endpoint/Kconfig"
144source "drivers/pci/switch/Kconfig"