| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | # |
| 3 | # PCI configuration |
| 4 | # |
| 5 | |
| 6 | source "drivers/pci/pcie/Kconfig" |
| 7 | |
| 8 | config PCI_MSI |
| 9 | bool "Message Signaled Interrupts (MSI and MSI-X)" |
| 10 | depends on PCI |
| 11 | select GENERIC_MSI_IRQ |
| 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 | |
| 24 | config PCI_MSI_IRQ_DOMAIN |
| 25 | def_bool ARC || ARM || ARM64 || X86 |
| 26 | depends on PCI_MSI |
| 27 | select GENERIC_MSI_IRQ_DOMAIN |
| 28 | |
| 29 | config PCI_QUIRKS |
| 30 | default y |
| 31 | bool "Enable PCI quirk workarounds" if EXPERT |
| 32 | depends on PCI |
| 33 | help |
| 34 | This enables workarounds for various PCI chipset bugs/quirks. |
| 35 | Disable this only if your target machine is unaffected by PCI |
| 36 | quirks. |
| 37 | |
| 38 | config PCI_DEBUG |
| 39 | bool "PCI Debugging" |
| 40 | depends on PCI && DEBUG_KERNEL |
| 41 | help |
| 42 | Say Y here if you want the PCI core to produce a bunch of debug |
| 43 | messages to the system log. Select this if you are having a |
| 44 | problem with PCI support and want to see more of what is going on. |
| 45 | |
| 46 | When in doubt, say N. |
| 47 | |
| 48 | config PCI_REALLOC_ENABLE_AUTO |
| 49 | bool "Enable PCI resource re-allocation detection" |
| 50 | depends on PCI |
| 51 | depends on PCI_IOV |
| 52 | help |
| 53 | Say Y here if you want the PCI core to detect if PCI resource |
| 54 | re-allocation needs to be enabled. You can always use pci=realloc=on |
| 55 | or pci=realloc=off to override it. It will automatically |
| 56 | re-allocate PCI resources if SR-IOV BARs have not been allocated by |
| 57 | the BIOS. |
| 58 | |
| 59 | When in doubt, say N. |
| 60 | |
| 61 | config PCI_STUB |
| 62 | tristate "PCI Stub driver" |
| 63 | depends on PCI |
| 64 | help |
| 65 | Say Y or M here if you want be able to reserve a PCI device |
| 66 | when it is going to be assigned to a guest operating system. |
| 67 | |
| 68 | When in doubt, say N. |
| 69 | |
| 70 | config PCI_PF_STUB |
| 71 | tristate "PCI PF Stub driver" |
| 72 | depends on PCI |
| 73 | depends on PCI_IOV |
| 74 | help |
| 75 | Say Y or M here if you want to enable support for devices that |
| 76 | require SR-IOV support, while at the same time the PF itself is |
| 77 | not providing any actual services on the host itself such as |
| 78 | storage or networking. |
| 79 | |
| 80 | When in doubt, say N. |
| 81 | |
| 82 | config XEN_PCIDEV_FRONTEND |
| 83 | tristate "Xen PCI Frontend" |
| 84 | depends on PCI && X86 && XEN |
| 85 | select PCI_XEN |
| 86 | select XEN_XENBUS_FRONTEND |
| 87 | default y |
| 88 | help |
| 89 | The PCI device frontend driver allows the kernel to import arbitrary |
| 90 | PCI devices from a PCI backend to support PCI driver domains. |
| 91 | |
| 92 | config PCI_DISABLE_COMMON_QUIRKS |
| 93 | bool "PCI disable common quirks" |
| 94 | depends on PCI |
| 95 | help |
| 96 | If you don't know what to do here, say N. |
| 97 | |
| 98 | |
| 99 | config PCI_ATS |
| 100 | bool |
| 101 | |
| 102 | config PCI_ECAM |
| 103 | bool |
| 104 | |
| 105 | config PCI_LOCKLESS_CONFIG |
| 106 | bool |
| 107 | |
| 108 | config PCI_IOV |
| 109 | bool "PCI IOV support" |
| 110 | depends on PCI |
| 111 | select PCI_ATS |
| 112 | help |
| 113 | I/O Virtualization is a PCI feature supported by some devices |
| 114 | which allows them to create virtual devices which share their |
| 115 | physical resources. |
| 116 | |
| 117 | If unsure, say N. |
| 118 | |
| 119 | config PCI_PRI |
| 120 | bool "PCI PRI support" |
| 121 | depends on PCI |
| 122 | select PCI_ATS |
| 123 | help |
| 124 | PRI is the PCI Page Request Interface. It allows PCI devices that are |
| 125 | behind an IOMMU to recover from page faults. |
| 126 | |
| 127 | If unsure, say N. |
| 128 | |
| 129 | config PCI_PASID |
| 130 | bool "PCI PASID support" |
| 131 | depends on PCI |
| 132 | select PCI_ATS |
| 133 | help |
| 134 | Process Address Space Identifiers (PASIDs) can be used by PCI devices |
| 135 | to access more than one IO address space at the same time. To make |
| 136 | use of this feature an IOMMU is required which also supports PASIDs. |
| 137 | Select this option if you have such an IOMMU and want to compile the |
| 138 | driver for it into your kernel. |
| 139 | |
| 140 | If unsure, say N. |
| 141 | |
| 142 | config PCI_LABEL |
| 143 | def_bool y if (DMI || ACPI) |
| 144 | depends on PCI |
| 145 | select NLS |
| 146 | |
| 147 | config PCI_HYPERV |
| 148 | tristate "Hyper-V PCI Frontend" |
| 149 | depends on PCI && X86 && HYPERV && PCI_MSI && PCI_MSI_IRQ_DOMAIN && X86_64 |
| 150 | help |
| 151 | The PCI device frontend driver allows the kernel to import arbitrary |
| 152 | PCI devices from a PCI backend to support PCI driver domains. |
| 153 | |
| 154 | source "drivers/pci/hotplug/Kconfig" |
| 155 | source "drivers/pci/controller/Kconfig" |
| 156 | source "drivers/pci/endpoint/Kconfig" |
| 157 | source "drivers/pci/switch/Kconfig" |