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 7*38b6a1cfSJiang 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 201da177e4SLinus Torvaldsconfig PCI_DEBUG 211da177e4SLinus Torvalds bool "PCI Debugging" 221da177e4SLinus Torvalds depends on PCI && DEBUG_KERNEL 231da177e4SLinus Torvalds help 241da177e4SLinus Torvalds Say Y here if you want the PCI core to produce a bunch of debug 251da177e4SLinus Torvalds messages to the system log. Select this if you are having a 261da177e4SLinus Torvalds problem with PCI support and want to see more of what is going on. 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds When in doubt, say N. 291da177e4SLinus Torvalds 30b07f2ebcSYinghai Luconfig PCI_REALLOC_ENABLE_AUTO 31b07f2ebcSYinghai Lu bool "Enable PCI resource re-allocation detection" 32b07f2ebcSYinghai Lu depends on PCI 33b07f2ebcSYinghai Lu help 34b07f2ebcSYinghai Lu Say Y here if you want the PCI core to detect if PCI resource 35b07f2ebcSYinghai Lu re-allocation needs to be enabled. You can always use pci=realloc=on 36b07f2ebcSYinghai Lu or pci=realloc=off to override it. Note this feature is a no-op 37b07f2ebcSYinghai Lu unless PCI_IOV support is also enabled; in that case it will 38b07f2ebcSYinghai Lu automatically re-allocate PCI resources if SR-IOV BARs have not 39b07f2ebcSYinghai Lu been allocated by the BIOS. 40b07f2ebcSYinghai Lu 41b07f2ebcSYinghai Lu When in doubt, say N. 42b07f2ebcSYinghai Lu 43c70e0d9dSChris Wrightconfig PCI_STUB 44c70e0d9dSChris Wright tristate "PCI Stub driver" 45c70e0d9dSChris Wright depends on PCI 46c70e0d9dSChris Wright help 47c70e0d9dSChris Wright Say Y or M here if you want be able to reserve a PCI device 48c70e0d9dSChris Wright when it is going to be assigned to a guest operating system. 49c70e0d9dSChris Wright 50c70e0d9dSChris Wright When in doubt, say N. 51c70e0d9dSChris Wright 52956a9202SRyan Wilsonconfig XEN_PCIDEV_FRONTEND 53956a9202SRyan Wilson tristate "Xen PCI Frontend" 54956a9202SRyan Wilson depends on PCI && X86 && XEN 55956a9202SRyan Wilson select PCI_XEN 56fce263c1SKonrad Rzeszutek Wilk select XEN_XENBUS_FRONTEND 57956a9202SRyan Wilson default y 58956a9202SRyan Wilson help 59956a9202SRyan Wilson The PCI device frontend driver allows the kernel to import arbitrary 60956a9202SRyan Wilson PCI devices from a PCI backend to support PCI driver domains. 61956a9202SRyan Wilson 628b955b0dSEric W. Biedermanconfig HT_IRQ 638b955b0dSEric W. Biederman bool "Interrupts on hypertransport devices" 648b955b0dSEric W. Biederman default y 65fbab41ccSAdrian Bunk depends on PCI && X86_LOCAL_APIC && X86_IO_APIC 668b955b0dSEric W. Biederman help 678b955b0dSEric W. Biederman This allows native hypertransport devices to use interrupts. 688b955b0dSEric W. Biederman 698b955b0dSEric W. Biederman If unsure say Y. 70d1b054daSYu Zhao 71db3c33c6SJoerg Roedelconfig PCI_ATS 72db3c33c6SJoerg Roedel bool 73db3c33c6SJoerg Roedel 74d1b054daSYu Zhaoconfig PCI_IOV 75d1b054daSYu Zhao bool "PCI IOV support" 76d1b054daSYu Zhao depends on PCI 77db3c33c6SJoerg Roedel select PCI_ATS 78d1b054daSYu Zhao help 79d1b054daSYu Zhao I/O Virtualization is a PCI feature supported by some devices 80d1b054daSYu Zhao which allows them to create virtual devices which share their 81d1b054daSYu Zhao physical resources. 82d1b054daSYu Zhao 83d1b054daSYu Zhao If unsure, say N. 84204d49a5SBjorn Helgaas 85c320b976SJoerg Roedelconfig PCI_PRI 86c320b976SJoerg Roedel bool "PCI PRI support" 87c54420d3SJoerg Roedel depends on PCI 88c320b976SJoerg Roedel select PCI_ATS 89c320b976SJoerg Roedel help 90c320b976SJoerg Roedel PRI is the PCI Page Request Interface. It allows PCI devices that are 91c320b976SJoerg Roedel behind an IOMMU to recover from page faults. 92c320b976SJoerg Roedel 93c320b976SJoerg Roedel If unsure, say N. 94c320b976SJoerg Roedel 95086ac11fSJoerg Roedelconfig PCI_PASID 96086ac11fSJoerg Roedel bool "PCI PASID support" 97086ac11fSJoerg Roedel depends on PCI 98086ac11fSJoerg Roedel select PCI_ATS 99086ac11fSJoerg Roedel help 100086ac11fSJoerg Roedel Process Address Space Identifiers (PASIDs) can be used by PCI devices 101086ac11fSJoerg Roedel to access more than one IO address space at the same time. To make 102086ac11fSJoerg Roedel use of this feature an IOMMU is required which also supports PASIDs. 103086ac11fSJoerg Roedel Select this option if you have such an IOMMU and want to compile the 104086ac11fSJoerg Roedel driver for it into your kernel. 105086ac11fSJoerg Roedel 106086ac11fSJoerg Roedel If unsure, say N. 107086ac11fSJoerg Roedel 108204d49a5SBjorn Helgaasconfig PCI_IOAPIC 10977410439SYinghai Lu bool "PCI IO-APIC hotplug support" if X86 110204d49a5SBjorn Helgaas depends on PCI 111204d49a5SBjorn Helgaas depends on ACPI 11277410439SYinghai Lu depends on X86_IO_APIC 113b95a7bd7SJan Beulich default !X86 1146058989bSNarendra_K@Dell.com 1158a226e00SRandy Dunlapconfig PCI_LABEL 1168a226e00SRandy Dunlap def_bool y if (DMI || ACPI) 1178a226e00SRandy Dunlap select NLS 11845361a4fSThomas Petazzoni 11945361a4fSThomas Petazzonisource "drivers/pci/host/Kconfig" 120