x64, x2apic/intr-remap: introduce CONFIG_INTR_REMAP

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 2cfccc987a2605e81f7017f4e055e09ddf8e3da3..0bf8391a7f2daaebf074eed219584c97b47c6f1b 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1651,6 +1651,14 @@ config DMAR_FLOPPY_WA
         workaround will setup a 1:1 mapping for the first
         16M to make floppy (an ISA device) work.
 
+config INTR_REMAP
+       bool "Support for Interrupt Remapping (EXPERIMENTAL)"
+       depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
+       help
+        Supports Interrupt remapping for IO-APIC and MSI devices.
+        To use x2apic mode in the CPU's which support x2APIC enhancements or
+        to support platforms with CPU's having > 8 bit APIC ID, say Y.
+
 source "drivers/pci/pcie/Kconfig"
 
 source "drivers/pci/Kconfig"