[GitHub/LineageOS/android_kernel_samsung_universal7580.git] / drivers / pci / Kconfig

#
# PCI configuration
#
config ARCH_SUPPORTS_MSI
	bool
	default n

config PCI_MSI
	bool "Message Signaled Interrupts (MSI and MSI-X)"
	depends on PCI
	depends on ARCH_SUPPORTS_MSI
	help
	   This allows device drivers to enable MSI (Message Signaled
	   Interrupts).  Message Signaled Interrupts enable a device to
	   generate an interrupt using an inbound Memory Write on its
	   PCI bus instead of asserting a device IRQ pin.

	   Use of PCI MSI interrupts can be disabled at kernel boot time
	   by using the 'pci=nomsi' option.  This disables MSI for the
	   entire system.

	   If you don't know what to do here, say Y.

config PCI_DEBUG
	bool "PCI Debugging"
	depends on PCI && DEBUG_KERNEL
	help
	  Say Y here if you want the PCI core to produce a bunch of debug
	  messages to the system log.  Select this if you are having a
	  problem with PCI support and want to see more of what is going on.

	  When in doubt, say N.

config PCI_REALLOC_ENABLE_AUTO
	bool "Enable PCI resource re-allocation detection"
	depends on PCI
	help
	  Say Y here if you want the PCI core to detect if PCI resource
	  re-allocation needs to be enabled. You can always use pci=realloc=on
          or pci=realloc=off to override it.  Note this feature is a no-op
          unless PCI_IOV support is also enabled; in that case it will
          automatically re-allocate PCI resources if SR-IOV BARs have not
          been allocated by the BIOS.

	  When in doubt, say N.

config PCI_STUB
	tristate "PCI Stub driver"
	depends on PCI
	help
	  Say Y or M here if you want be able to reserve a PCI device
	  when it is going to be assigned to a guest operating system.

	  When in doubt, say N.

config XEN_PCIDEV_FRONTEND
        tristate "Xen PCI Frontend"
        depends on PCI && X86 && XEN
        select HOTPLUG
        select PCI_XEN
	select XEN_XENBUS_FRONTEND
        default y
        help
          The PCI device frontend driver allows the kernel to import arbitrary
          PCI devices from a PCI backend to support PCI driver domains.

config HT_IRQ
	bool "Interrupts on hypertransport devices"
	default y
	depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
	help
	   This allows native hypertransport devices to use interrupts.

	   If unsure say Y.

config PCI_ATS
	bool

config PCI_IOV
	bool "PCI IOV support"
	depends on PCI
	select PCI_ATS
	help
	  I/O Virtualization is a PCI feature supported by some devices
	  which allows them to create virtual devices which share their
	  physical resources.

	  If unsure, say N.

config PCI_PRI
	bool "PCI PRI support"
	depends on PCI
	select PCI_ATS
	help
	  PRI is the PCI Page Request Interface. It allows PCI devices that are
	  behind an IOMMU to recover from page faults.

	  If unsure, say N.

config PCI_PASID
	bool "PCI PASID support"
	depends on PCI
	select PCI_ATS
	help
	  Process Address Space Identifiers (PASIDs) can be used by PCI devices
	  to access more than one IO address space at the same time. To make
	  use of this feature an IOMMU is required which also supports PASIDs.
	  Select this option if you have such an IOMMU and want to compile the
	  driver for it into your kernel.

	  If unsure, say N.

config PCI_IOAPIC
	tristate "PCI IO-APIC hotplug support" if X86
	depends on PCI
	depends on ACPI
	depends on HOTPLUG
	default !X86

config PCI_LABEL
	def_bool y if (DMI || ACPI)
	select NLS
Commit	Line	Data
1da177e4 LT	1	#
	2	# PCI configuration
	3	#
f282b970 DW	4	config ARCH_SUPPORTS_MSI
	5	bool
	6	default n
	7
1da177e4 LT	8	config PCI_MSI
	9	bool "Message Signaled Interrupts (MSI and MSI-X)"
	10	depends on PCI
f282b970	11	depends on ARCH_SUPPORTS_MSI
1da177e4 LT	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
309e57df MW	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
3196180a	22	If you don't know what to do here, say Y.
1da177e4	23
1da177e4 LT	24	config 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
b07f2ebc YL	34	config 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
c70e0d9d CW	47	config 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
956a9202 RW	56	config XEN_PCIDEV_FRONTEND
	57	tristate "Xen PCI Frontend"
	58	depends on PCI && X86 && XEN
	59	select HOTPLUG
	60	select PCI_XEN
fce263c1	61	select XEN_XENBUS_FRONTEND
956a9202 RW	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
8b955b0d EB	67	config HT_IRQ
	68	bool "Interrupts on hypertransport devices"
	69	default y
fbab41cc	70	depends on PCI && X86_LOCAL_APIC && X86_IO_APIC
8b955b0d EB	71	help
	72	This allows native hypertransport devices to use interrupts.
	73
	74	If unsure say Y.
d1b054da	75
db3c33c6 JR	76	config PCI_ATS
	77	bool
	78
d1b054da YZ	79	config PCI_IOV
	80	bool "PCI IOV support"
	81	depends on PCI
db3c33c6	82	select PCI_ATS
d1b054da YZ	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.
204d49a5	89
c320b976 JR	90	config PCI_PRI
c320b976 JR	91	bool "PCI PRI support"
c54420d3	92	depends on PCI
c320b976 JR	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
086ac11f JR	100	config 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
204d49a5	113	config PCI_IOAPIC
b95a7bd7	114	tristate "PCI IO-APIC hotplug support" if X86
204d49a5 BH	115	depends on PCI
	116	depends on ACPI
	117	depends on HOTPLUG
b95a7bd7	118	default !X86
6058989b	119
8a226e00 RD	120	config PCI_LABEL
	121	def_bool y if (DMI \|\| ACPI)
	122	select NLS