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 HT_IRQ 55 bool "Interrupts on hypertransport devices" 56 default y 57 depends on PCI && X86_LOCAL_APIC && X86_IO_APIC 58 help 59 This allows native hypertransport devices to use interrupts. 60 61 If unsure say Y. 62 63config PCI_ATS 64 bool 65 66config PCI_IOV 67 bool "PCI IOV support" 68 depends on PCI 69 select PCI_ATS 70 help 71 I/O Virtualization is a PCI feature supported by some devices 72 which allows them to create virtual devices which share their 73 physical resources. 74 75 If unsure, say N. 76 77config PCI_PRI 78 bool "PCI PRI support" 79 depends on PCI 80 select PCI_ATS 81 help 82 PRI is the PCI Page Request Interface. It allows PCI devices that are 83 behind an IOMMU to recover from page faults. 84 85 If unsure, say N. 86 87config PCI_PASID 88 bool "PCI PASID support" 89 depends on PCI 90 select PCI_ATS 91 help 92 Process Address Space Identifiers (PASIDs) can be used by PCI devices 93 to access more than one IO address space at the same time. To make 94 use of this feature an IOMMU is required which also supports PASIDs. 95 Select this option if you have such an IOMMU and want to compile the 96 driver for it into your kernel. 97 98 If unsure, say N. 99 100config PCI_IOAPIC 101 tristate "PCI IO-APIC hotplug support" if X86 102 depends on PCI 103 depends on ACPI 104 depends on HOTPLUG 105 default !X86 106 107config PCI_LABEL 108 def_bool y if (DMI || ACPI) 109 select NLS 110