# # PCI configuration # config PCI_MSI bool "Message Signaled Interrupts (MSI and MSI-X)" depends on PCI help This allows device drivers to enable MSI (Message Signaled Interrupts). Message Signaled Interrupts enable a device to generate an interrupt using an inbound Memory Write on its PCI bus instead of asserting a device IRQ pin. Use of PCI MSI interrupts can be disabled at kernel boot time by using the 'pci=nomsi' option. This disables MSI for the entire system. If you don't know what to do here, say Y. config PCI_DEBUG bool "PCI Debugging" depends on PCI && DEBUG_KERNEL help Say Y here if you want the PCI core to produce a bunch of debug messages to the system log. Select this if you are having a problem with PCI support and want to see more of what is going on. When in doubt, say N. config PCI_REALLOC_ENABLE_AUTO bool "Enable PCI resource re-allocation detection" depends on PCI help Say Y here if you want the PCI core to detect if PCI resource re-allocation needs to be enabled. You can always use pci=realloc=on or pci=realloc=off to override it. Note this feature is a no-op unless PCI_IOV support is also enabled; in that case it will automatically re-allocate PCI resources if SR-IOV BARs have not been allocated by the BIOS. When in doubt, say N. config PCI_STUB tristate "PCI Stub driver" depends on PCI help Say Y or M here if you want be able to reserve a PCI device when it is going to be assigned to a guest operating system. When in doubt, say N. config XEN_PCIDEV_FRONTEND tristate "Xen PCI Frontend" depends on PCI && X86 && XEN select PCI_XEN select XEN_XENBUS_FRONTEND default y help The PCI device frontend driver allows the kernel to import arbitrary PCI devices from a PCI backend to support PCI driver domains. config HT_IRQ bool "Interrupts on hypertransport devices" default y depends on PCI && X86_LOCAL_APIC && X86_IO_APIC help This allows native hypertransport devices to use interrupts. If unsure say Y. config PCI_ATS bool config PCI_IOV bool "PCI IOV support" depends on PCI select PCI_ATS help I/O Virtualization is a PCI feature supported by some devices which allows them to create virtual devices which share their physical resources. If unsure, say N. config PCI_PRI bool "PCI PRI support" depends on PCI select PCI_ATS help PRI is the PCI Page Request Interface. It allows PCI devices that are behind an IOMMU to recover from page faults. If unsure, say N. config PCI_PASID bool "PCI PASID support" depends on PCI select PCI_ATS help Process Address Space Identifiers (PASIDs) can be used by PCI devices to access more than one IO address space at the same time. To make use of this feature an IOMMU is required which also supports PASIDs. Select this option if you have such an IOMMU and want to compile the driver for it into your kernel. If unsure, say N. config PCI_IOAPIC bool "PCI IO-APIC hotplug support" if X86 depends on PCI depends on ACPI depends on X86_IO_APIC default !X86 config PCI_MSM bool "MSM PCIe Controller driver" depends on ARCH_MSM && PCI select PCI_DOMAINS select PCI_DOMAINS_GENERIC select PCI_MSI help Enables the PCIe functionality by configuring PCIe core on MSM chipset and by enabling the ARM PCI framework extension. The PCIe core is essential for communication between the host and an endpoint. If unsure, say N. config SEC_BSP_PCIE_DEV bool "PCIE debug feature for developers" depends on PCI_MSM && SEC_BSP config SEC_BSP_PCIE_LINKFAIL_PANIC bool "PCIE debug feature. Make panic when linkup failure after linkdown" depends on PCI_MSM && SEC_BSP config PCI_LABEL def_bool y if (DMI || ACPI) select NLS source "drivers/pci/host/Kconfig"