1# 2# PCI configuration 3# 4config PCI_BUS_ADDR_T_64BIT 5 def_bool y if (ARCH_DMA_ADDR_T_64BIT || 64BIT) 6 depends on PCI 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 bool 26 depends on PCI_MSI 27 select GENERIC_MSI_IRQ_DOMAIN 28 29config PCI_DEBUG 30 bool "PCI Debugging" 31 depends on PCI && DEBUG_KERNEL 32 help 33 Say Y here if you want the PCI core to produce a bunch of debug 34 messages to the system log. Select this if you are having a 35 problem with PCI support and want to see more of what is going on. 36 37 When in doubt, say N. 38 39config PCI_REALLOC_ENABLE_AUTO 40 bool "Enable PCI resource re-allocation detection" 41 depends on PCI 42 help 43 Say Y here if you want the PCI core to detect if PCI resource 44 re-allocation needs to be enabled. You can always use pci=realloc=on 45 or pci=realloc=off to override it. Note this feature is a no-op 46 unless PCI_IOV support is also enabled; in that case it will 47 automatically re-allocate PCI resources if SR-IOV BARs have not 48 been allocated by the BIOS. 49 50 When in doubt, say N. 51 52config PCI_STUB 53 tristate "PCI Stub driver" 54 depends on PCI 55 help 56 Say Y or M here if you want be able to reserve a PCI device 57 when it is going to be assigned to a guest operating system. 58 59 When in doubt, say N. 60 61config XEN_PCIDEV_FRONTEND 62 tristate "Xen PCI Frontend" 63 depends on PCI && X86 && XEN 64 select PCI_XEN 65 select XEN_XENBUS_FRONTEND 66 default y 67 help 68 The PCI device frontend driver allows the kernel to import arbitrary 69 PCI devices from a PCI backend to support PCI driver domains. 70 71config HT_IRQ 72 bool "Interrupts on hypertransport devices" 73 default y 74 depends on PCI && X86_LOCAL_APIC 75 help 76 This allows native hypertransport devices to use interrupts. 77 78 If unsure say Y. 79 80config PCI_ATS 81 bool 82 83config PCI_IOV 84 bool "PCI IOV support" 85 depends on PCI 86 select PCI_ATS 87 help 88 I/O Virtualization is a PCI feature supported by some devices 89 which allows them to create virtual devices which share their 90 physical resources. 91 92 If unsure, say N. 93 94config PCI_PRI 95 bool "PCI PRI support" 96 depends on PCI 97 select PCI_ATS 98 help 99 PRI is the PCI Page Request Interface. It allows PCI devices that are 100 behind an IOMMU to recover from page faults. 101 102 If unsure, say N. 103 104config PCI_PASID 105 bool "PCI PASID support" 106 depends on PCI 107 select PCI_ATS 108 help 109 Process Address Space Identifiers (PASIDs) can be used by PCI devices 110 to access more than one IO address space at the same time. To make 111 use of this feature an IOMMU is required which also supports PASIDs. 112 Select this option if you have such an IOMMU and want to compile the 113 driver for it into your kernel. 114 115 If unsure, say N. 116 117config PCI_LABEL 118 def_bool y if (DMI || ACPI) 119 select NLS 120 121source "drivers/pci/host/Kconfig" 122