#
# PCI configuration
#
-config PCI_USE_VECTOR
- bool "Vector-based interrupt indexing (MSI)"
+config PCI_MSI
+ bool "Message Signaled Interrupts (MSI and MSI-X)"
+ depends on PCI
depends on (X86_LOCAL_APIC && X86_IO_APIC) || IA64
- default n
help
- This replaces the current existing IRQ-based index interrupt scheme
- with the vector-base index scheme. The advantages of vector base
- over IRQ base are listed below:
- 1) Support MSI implementation.
- 2) Support future IOxAPIC hotplug
-
- Note that this allows the device drivers to enable MSI, Message
- Signaled Interrupt, on all MSI capable device functions detected.
- Message Signal Interrupt enables an MSI-capable hardware device to
- send an inbound Memory Write on its PCI bus instead of asserting
- IRQ signal on device IRQ pin.
+ 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.
If you don't know what to do here, say N.
lspci can provide the same data, as well as much more. lspci is a part of
the pci-utils package, which should be installed by your distribution.
- See Documentation/Changes for information on where to get the latest
+ See <file:Documentation/Changes> for information on where to get the latest
version.
When in doubt, say N.
-config PCI_NAMES
- bool "PCI device name database"
- depends on PCI
- ---help---
- By default, the kernel contains a database of all known PCI device
- names to make the information in /proc/pci, /proc/ioports and
- similar files comprehensible to the user.
-
- This database increases size of the kernel image by about 80KB. This
- memory is freed after the system boots up if CONFIG_HOTPLUG is not set.
-
- Anyway, if you are building an installation floppy or kernel for an
- embedded system where kernel image size really matters, you can disable
- this feature and you'll get device ID numbers instead of names.
+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 Y.
+ When in doubt, say N.