11da177e4SLinus Torvalds# 21da177e4SLinus Torvalds# PCI configuration 31da177e4SLinus Torvalds# 41da177e4SLinus Torvaldsconfig PCI_MSI 51da177e4SLinus Torvalds bool "Message Signaled Interrupts (MSI and MSI-X)" 61da177e4SLinus Torvalds depends on PCI 738b6a1cfSJiang Liu select GENERIC_MSI_IRQ 81da177e4SLinus Torvalds help 91da177e4SLinus Torvalds This allows device drivers to enable MSI (Message Signaled 101da177e4SLinus Torvalds Interrupts). Message Signaled Interrupts enable a device to 111da177e4SLinus Torvalds generate an interrupt using an inbound Memory Write on its 121da177e4SLinus Torvalds PCI bus instead of asserting a device IRQ pin. 131da177e4SLinus Torvalds 14309e57dfSMatthew Wilcox Use of PCI MSI interrupts can be disabled at kernel boot time 15309e57dfSMatthew Wilcox by using the 'pci=nomsi' option. This disables MSI for the 16309e57dfSMatthew Wilcox entire system. 17309e57dfSMatthew Wilcox 183196180aSJesse Barnes If you don't know what to do here, say Y. 191da177e4SLinus Torvalds 203878eaefSJiang Liuconfig PCI_MSI_IRQ_DOMAIN 213878eaefSJiang Liu bool 223878eaefSJiang Liu depends on PCI_MSI 233878eaefSJiang Liu select GENERIC_MSI_IRQ_DOMAIN 243878eaefSJiang Liu 251da177e4SLinus Torvaldsconfig PCI_DEBUG 261da177e4SLinus Torvalds bool "PCI Debugging" 271da177e4SLinus Torvalds depends on PCI && DEBUG_KERNEL 281da177e4SLinus Torvalds help 291da177e4SLinus Torvalds Say Y here if you want the PCI core to produce a bunch of debug 301da177e4SLinus Torvalds messages to the system log. Select this if you are having a 311da177e4SLinus Torvalds problem with PCI support and want to see more of what is going on. 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds When in doubt, say N. 341da177e4SLinus Torvalds 35b07f2ebcSYinghai Luconfig PCI_REALLOC_ENABLE_AUTO 36b07f2ebcSYinghai Lu bool "Enable PCI resource re-allocation detection" 37b07f2ebcSYinghai Lu depends on PCI 38b07f2ebcSYinghai Lu help 39b07f2ebcSYinghai Lu Say Y here if you want the PCI core to detect if PCI resource 40b07f2ebcSYinghai Lu re-allocation needs to be enabled. You can always use pci=realloc=on 41b07f2ebcSYinghai Lu or pci=realloc=off to override it. Note this feature is a no-op 42b07f2ebcSYinghai Lu unless PCI_IOV support is also enabled; in that case it will 43b07f2ebcSYinghai Lu automatically re-allocate PCI resources if SR-IOV BARs have not 44b07f2ebcSYinghai Lu been allocated by the BIOS. 45b07f2ebcSYinghai Lu 46b07f2ebcSYinghai Lu When in doubt, say N. 47b07f2ebcSYinghai Lu 48c70e0d9dSChris Wrightconfig PCI_STUB 49c70e0d9dSChris Wright tristate "PCI Stub driver" 50c70e0d9dSChris Wright depends on PCI 51c70e0d9dSChris Wright help 52c70e0d9dSChris Wright Say Y or M here if you want be able to reserve a PCI device 53c70e0d9dSChris Wright when it is going to be assigned to a guest operating system. 54c70e0d9dSChris Wright 55c70e0d9dSChris Wright When in doubt, say N. 56c70e0d9dSChris Wright 57956a9202SRyan Wilsonconfig XEN_PCIDEV_FRONTEND 58956a9202SRyan Wilson tristate "Xen PCI Frontend" 59956a9202SRyan Wilson depends on PCI && X86 && XEN 60956a9202SRyan Wilson select PCI_XEN 61fce263c1SKonrad Rzeszutek Wilk select XEN_XENBUS_FRONTEND 62956a9202SRyan Wilson default y 63956a9202SRyan Wilson help 64956a9202SRyan Wilson The PCI device frontend driver allows the kernel to import arbitrary 65956a9202SRyan Wilson PCI devices from a PCI backend to support PCI driver domains. 66956a9202SRyan Wilson 678b955b0dSEric W. Biedermanconfig HT_IRQ 688b955b0dSEric W. Biederman bool "Interrupts on hypertransport devices" 698b955b0dSEric W. Biederman default y 70*2f600025SJiang Liu depends on PCI && X86_LOCAL_APIC 718b955b0dSEric W. Biederman help 728b955b0dSEric W. Biederman This allows native hypertransport devices to use interrupts. 738b955b0dSEric W. Biederman 748b955b0dSEric W. Biederman If unsure say Y. 75d1b054daSYu Zhao 76db3c33c6SJoerg Roedelconfig PCI_ATS 77db3c33c6SJoerg Roedel bool 78db3c33c6SJoerg Roedel 79d1b054daSYu Zhaoconfig PCI_IOV 80d1b054daSYu Zhao bool "PCI IOV support" 81d1b054daSYu Zhao depends on PCI 82db3c33c6SJoerg Roedel select PCI_ATS 83d1b054daSYu Zhao help 84d1b054daSYu Zhao I/O Virtualization is a PCI feature supported by some devices 85d1b054daSYu Zhao which allows them to create virtual devices which share their 86d1b054daSYu Zhao physical resources. 87d1b054daSYu Zhao 88d1b054daSYu Zhao If unsure, say N. 89204d49a5SBjorn Helgaas 90c320b976SJoerg Roedelconfig PCI_PRI 91c320b976SJoerg Roedel bool "PCI PRI support" 92c54420d3SJoerg Roedel depends on PCI 93c320b976SJoerg Roedel select PCI_ATS 94c320b976SJoerg Roedel help 95c320b976SJoerg Roedel PRI is the PCI Page Request Interface. It allows PCI devices that are 96c320b976SJoerg Roedel behind an IOMMU to recover from page faults. 97c320b976SJoerg Roedel 98c320b976SJoerg Roedel If unsure, say N. 99c320b976SJoerg Roedel 100086ac11fSJoerg Roedelconfig PCI_PASID 101086ac11fSJoerg Roedel bool "PCI PASID support" 102086ac11fSJoerg Roedel depends on PCI 103086ac11fSJoerg Roedel select PCI_ATS 104086ac11fSJoerg Roedel help 105086ac11fSJoerg Roedel Process Address Space Identifiers (PASIDs) can be used by PCI devices 106086ac11fSJoerg Roedel to access more than one IO address space at the same time. To make 107086ac11fSJoerg Roedel use of this feature an IOMMU is required which also supports PASIDs. 108086ac11fSJoerg Roedel Select this option if you have such an IOMMU and want to compile the 109086ac11fSJoerg Roedel driver for it into your kernel. 110086ac11fSJoerg Roedel 111086ac11fSJoerg Roedel If unsure, say N. 112086ac11fSJoerg Roedel 1138a226e00SRandy Dunlapconfig PCI_LABEL 1148a226e00SRandy Dunlap def_bool y if (DMI || ACPI) 1158a226e00SRandy Dunlap select NLS 11645361a4fSThomas Petazzoni 11745361a4fSThomas Petazzonisource "drivers/pci/host/Kconfig" 118