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_STUB 35 tristate "PCI Stub driver" 36 depends on PCI 37 help 38 Say Y or M here if you want be able to reserve a PCI device 39 when it is going to be assigned to a guest operating system. 40 41 When in doubt, say N. 42 43config XEN_PCIDEV_FRONTEND 44 tristate "Xen PCI Frontend" 45 depends on PCI && X86 && XEN 46 select HOTPLUG 47 select PCI_XEN 48 select XEN_XENBUS_FRONTEND 49 default y 50 help 51 The PCI device frontend driver allows the kernel to import arbitrary 52 PCI devices from a PCI backend to support PCI driver domains. 53 54config XEN_PCIDEV_FE_DEBUG 55 bool "Xen PCI Frontend debugging" 56 depends on XEN_PCIDEV_FRONTEND && PCI_DEBUG 57 help 58 Say Y here if you want the Xen PCI frontend to produce a bunch of debug 59 messages to the system log. Select this if you are having a 60 problem with Xen PCI frontend support and want to see more of what is 61 going on. 62 63 When in doubt, say N. 64 65config HT_IRQ 66 bool "Interrupts on hypertransport devices" 67 default y 68 depends on PCI && X86_LOCAL_APIC && X86_IO_APIC 69 help 70 This allows native hypertransport devices to use interrupts. 71 72 If unsure say Y. 73 74config PCI_ATS 75 bool 76 77config PCI_IOV 78 bool "PCI IOV support" 79 depends on PCI 80 select PCI_ATS 81 help 82 I/O Virtualization is a PCI feature supported by some devices 83 which allows them to create virtual devices which share their 84 physical resources. 85 86 If unsure, say N. 87 88config PCI_PRI 89 bool "PCI PRI support" 90 select PCI_ATS 91 help 92 PRI is the PCI Page Request Interface. It allows PCI devices that are 93 behind an IOMMU to recover from page faults. 94 95 If unsure, say N. 96 97config PCI_PASID 98 bool "PCI PASID support" 99 depends on PCI 100 select PCI_ATS 101 help 102 Process Address Space Identifiers (PASIDs) can be used by PCI devices 103 to access more than one IO address space at the same time. To make 104 use of this feature an IOMMU is required which also supports PASIDs. 105 Select this option if you have such an IOMMU and want to compile the 106 driver for it into your kernel. 107 108 If unsure, say N. 109 110config PCI_IOAPIC 111 bool 112 depends on PCI 113 depends on ACPI 114 depends on HOTPLUG 115 default y 116 117config PCI_LABEL 118 def_bool y if (DMI || ACPI) 119 select NLS 120