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