#
# PCI configuration
#
-config PCI_USE_VECTOR
- bool "Vector-based interrupt indexing (MSI)"
- depends on (X86_LOCAL_APIC && X86_IO_APIC && !X86_64) || IA64
+config PCI_MSI
+ bool "Message Signaled Interrupts (MSI and MSI-X)"
+ 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.