| 1 | # |
| 2 | # PCI configuration |
| 3 | # |
| 4 | config ARCH_SUPPORTS_MSI |
| 5 | bool |
| 6 | |
| 7 | config 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 | |
| 23 | config 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 | |
| 33 | config 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 | |
| 46 | config 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 | |
| 55 | config XEN_PCIDEV_FRONTEND |
| 56 | tristate "Xen PCI Frontend" |
| 57 | depends on PCI && X86 && XEN |
| 58 | select PCI_XEN |
| 59 | select XEN_XENBUS_FRONTEND |
| 60 | default y |
| 61 | help |
| 62 | The PCI device frontend driver allows the kernel to import arbitrary |
| 63 | PCI devices from a PCI backend to support PCI driver domains. |
| 64 | |
| 65 | config 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 | |
| 74 | config PCI_ATS |
| 75 | bool |
| 76 | |
| 77 | config 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 | |
| 88 | config PCI_PRI |
| 89 | bool "PCI PRI support" |
| 90 | depends on PCI |
| 91 | select PCI_ATS |
| 92 | help |
| 93 | PRI is the PCI Page Request Interface. It allows PCI devices that are |
| 94 | behind an IOMMU to recover from page faults. |
| 95 | |
| 96 | If unsure, say N. |
| 97 | |
| 98 | config PCI_PASID |
| 99 | bool "PCI PASID support" |
| 100 | depends on PCI |
| 101 | select PCI_ATS |
| 102 | help |
| 103 | Process Address Space Identifiers (PASIDs) can be used by PCI devices |
| 104 | to access more than one IO address space at the same time. To make |
| 105 | use of this feature an IOMMU is required which also supports PASIDs. |
| 106 | Select this option if you have such an IOMMU and want to compile the |
| 107 | driver for it into your kernel. |
| 108 | |
| 109 | If unsure, say N. |
| 110 | |
| 111 | config PCI_IOAPIC |
| 112 | tristate "PCI IO-APIC hotplug support" if X86 |
| 113 | depends on PCI |
| 114 | depends on ACPI |
| 115 | default !X86 |
| 116 | |
| 117 | config PCI_LABEL |
| 118 | def_bool y if (DMI || ACPI) |
| 119 | select NLS |
| 120 | |
| 121 | source "drivers/pci/host/Kconfig" |