1# 2# PCI configuration 3# 4config ARCH_SUPPORTS_MSI 5 bool 6 7config PCI_MSI 8 bool "Message Signaled Interrupts (MSI and MSI-X)" 9 depends on PCI 10 depends on ARCH_SUPPORTS_MSI 11 help 12 This allows device drivers to enable MSI (Message Signaled 13 Interrupts). Message Signaled Interrupts enable a device to 14 generate an interrupt using an inbound Memory Write on its 15 PCI bus instead of asserting a device IRQ pin. 16 17 Use of PCI MSI interrupts can be disabled at kernel boot time 18 by using the 'pci=nomsi' option. This disables MSI for the 19 entire system. 20 21 If you don't know what to do here, say Y. 22 23config PCI_DEBUG 24 bool "PCI Debugging" 25 depends on PCI && DEBUG_KERNEL 26 help 27 Say Y here if you want the PCI core to produce a bunch of debug 28 messages to the system log. Select this if you are having a 29 problem with PCI support and want to see more of what is going on. 30 31 When in doubt, say N. 32 33config PCI_REALLOC_ENABLE_AUTO 34 bool "Enable PCI resource re-allocation detection" 35 depends on PCI 36 help 37 Say Y here if you want the PCI core to detect if PCI resource 38 re-allocation needs to be enabled. You can always use pci=realloc=on 39 or pci=realloc=off to override it. Note this feature is a no-op 40 unless PCI_IOV support is also enabled; in that case it will 41 automatically re-allocate PCI resources if SR-IOV BARs have not 42 been allocated by the BIOS. 43 44 When in doubt, say N. 45 46config PCI_STUB 47 tristate "PCI Stub driver" 48 depends on PCI 49 help 50 Say Y or M here if you want be able to reserve a PCI device 51 when it is going to be assigned to a guest operating system. 52 53 When in doubt, say N. 54 55config XEN_PCIDEV_FRONTEND 56 tristate "Xen PCI Frontend" 57 depends on PCI && X86 && XEN 58 select HOTPLUG 59 select PCI_XEN 60 select XEN_XENBUS_FRONTEND 61 default y 62 help 63 The PCI device frontend driver allows the kernel to import arbitrary 64 PCI devices from a PCI backend to support PCI driver domains. 65 66config HT_IRQ 67 bool "Interrupts on hypertransport devices" 68 default y 69 depends on PCI && X86_LOCAL_APIC && X86_IO_APIC 70 help 71 This allows native hypertransport devices to use interrupts. 72 73 If unsure say Y. 74 75config PCI_ATS 76 bool 77 78config PCI_IOV 79 bool "PCI IOV support" 80 depends on PCI 81 select PCI_ATS 82 help 83 I/O Virtualization is a PCI feature supported by some devices 84 which allows them to create virtual devices which share their 85 physical resources. 86 87 If unsure, say N. 88 89config PCI_PRI 90 bool "PCI PRI support" 91 depends on PCI 92 select PCI_ATS 93 help 94 PRI is the PCI Page Request Interface. It allows PCI devices that are 95 behind an IOMMU to recover from page faults. 96 97 If unsure, say N. 98 99config PCI_PASID 100 bool "PCI PASID support" 101 depends on PCI 102 select PCI_ATS 103 help 104 Process Address Space Identifiers (PASIDs) can be used by PCI devices 105 to access more than one IO address space at the same time. To make 106 use of this feature an IOMMU is required which also supports PASIDs. 107 Select this option if you have such an IOMMU and want to compile the 108 driver for it into your kernel. 109 110 If unsure, say N. 111 112config PCI_IOAPIC 113 tristate "PCI IO-APIC hotplug support" if X86 114 depends on PCI 115 depends on ACPI 116 depends on HOTPLUG 117 default !X86 118 119config PCI_LABEL 120 def_bool y if (DMI || ACPI) 121 select NLS 122