1# 2# PCI configuration 3# 4config ARCH_SUPPORTS_MSI 5 bool 6 default n 7 8config PCI_MSI 9 bool "Message Signaled Interrupts (MSI and MSI-X)" 10 depends on PCI 11 depends on ARCH_SUPPORTS_MSI 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_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 34config 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 47config 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 56config XEN_PCIDEV_FRONTEND 57 tristate "Xen PCI Frontend" 58 depends on PCI && X86 && XEN 59 select HOTPLUG 60 select PCI_XEN 61 select XEN_XENBUS_FRONTEND 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 67config HT_IRQ 68 bool "Interrupts on hypertransport devices" 69 default y 70 depends on PCI && X86_LOCAL_APIC && X86_IO_APIC 71 help 72 This allows native hypertransport devices to use interrupts. 73 74 If unsure say Y. 75 76config PCI_ATS 77 bool 78 79config PCI_IOV 80 bool "PCI IOV support" 81 depends on PCI 82 select PCI_ATS 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. 89 90config PCI_PRI 91 bool "PCI PRI support" 92 depends on PCI 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 100config 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 113config PCI_IOAPIC 114 tristate "PCI IO-APIC hotplug support" if X86 115 depends on PCI 116 depends on ACPI 117 depends on HOTPLUG 118 default !X86 119 120config PCI_LABEL 121 def_bool y if (DMI || ACPI) 122 select NLS 123