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