x64, x2apic/intr-remap: x2apic cluster mode support

x2apic cluster mode support.

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>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/x86/kernel/genapic_64.c b/arch/x86/kernel/genapic_64.c
index 6657de609dcb..1029e178cdf7 100644
--- a/arch/x86/kernel/genapic_64.c
+++ b/arch/x86/kernel/genapic_64.c
@@ -38,6 +38,8 @@ void __init setup_apic_routing(void)
 {
         if (uv_system_type == UV_NON_UNIQUE_APIC)
                 genapic = &apic_x2apic_uv_x;
+        else if (cpu_has_x2apic && intr_remapping_enabled)
+                genapic = &apic_x2apic_cluster;
         else
 #ifdef CONFIG_ACPI
         /*