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" 145