1# 2# PCI configuration 3# 4config PCI_MSI 5 bool "Message Signaled Interrupts (MSI and MSI-X)" 6 depends on PCI 7 select GENERIC_MSI_IRQ 8 help 9 This allows device drivers to enable MSI (Message Signaled 10 Interrupts). Message Signaled Interrupts enable a device to 11 generate an interrupt using an inbound Memory Write on its 12 PCI bus instead of asserting a device IRQ pin. 13 14 Use of PCI MSI interrupts can be disabled at kernel boot time 15 by using the 'pci=nomsi' option. This disables MSI for the 16 entire system. 17 18 If you don't know what to do here, say Y. 19 20config PCI_MSI_IRQ_DOMAIN 21 bool 22 depends on PCI_MSI 23 select GENERIC_MSI_IRQ_DOMAIN 24 25config PCI_DEBUG 26 bool "PCI Debugging" 27 depends on PCI && DEBUG_KERNEL 28 help 29 Say Y here if you want the PCI core to produce a bunch of debug 30 messages to the system log. Select this if you are having a 31 problem with PCI support and want to see more of what is going on. 32 33 When in doubt, say N. 34 35config PCI_REALLOC_ENABLE_AUTO 36 bool "Enable PCI resource re-allocation detection" 37 depends on PCI 38 help 39 Say Y here if you want the PCI core to detect if PCI resource 40 re-allocation needs to be enabled. You can always use pci=realloc=on 41 or pci=realloc=off to override it. Note this feature is a no-op 42 unless PCI_IOV support is also enabled; in that case it will 43 automatically re-allocate PCI resources if SR-IOV BARs have not 44 been allocated by the BIOS. 45 46 When in doubt, say N. 47 48config PCI_STUB 49 tristate "PCI Stub driver" 50 depends on PCI 51 help 52 Say Y or M here if you want be able to reserve a PCI device 53 when it is going to be assigned to a guest operating system. 54 55 When in doubt, say N. 56 57config XEN_PCIDEV_FRONTEND 58 tristate "Xen PCI Frontend" 59 depends on PCI && X86 && XEN 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 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_LABEL 114 def_bool y if (DMI || ACPI) 115 select NLS 116 117source "drivers/pci/host/Kconfig" 118