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