NTB: Introduce MSI library

[tomoyo/tomoyo-test1.git] / drivers / ntb / Kconfig

diff --git a/drivers/ntb/Kconfig b/drivers/ntb/Kconfig
index 95944e5..5760764 100644 (file)
--- a/drivers/ntb/Kconfig
+++ b/drivers/ntb/Kconfig
@@ -12,6 +12,17 @@ menuconfig NTB
 
 if NTB
 
+config NTB_MSI
+       bool "MSI Interrupt Support"
+       depends on PCI_MSI
+       help
+        Support using MSI interrupt forwarding instead of (or in addition to)
+        hardware doorbells. MSI interrupts typically offer lower latency
+        than doorbells and more MSI interrupts can be made available to
+        clients. However this requires an extra memory window and support
+        in the hardware driver for creating the MSI interrupts.
+
+        If unsure, say N.
 source "drivers/ntb/hw/Kconfig"
 
 source "drivers/ntb/test/Kconfig"