x86: add apic probe for genapic 64bit - fix
intr_remapping_enabled get assigned later, so need to check that
in setup_apic_routing
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/genapic_64.c b/arch/x86/kernel/genapic_64.c
index b3ba969..6c9bfc9 100644
--- a/arch/x86/kernel/genapic_64.c
+++ b/arch/x86/kernel/genapic_64.c
@@ -16,6 +16,7 @@
#include <linux/ctype.h>
#include <linux/init.h>
#include <linux/hardirq.h>
+#include <linux/dmar.h>
#include <asm/smp.h>
#include <asm/ipi.h>
@@ -42,6 +43,11 @@
*/
void __init setup_apic_routing(void)
{
+ if (genapic == &apic_x2apic_phys || genapic == &apic_x2apic_cluster) {
+ if (!intr_remapping_enabled)
+ genapic = &apic_flat;
+ }
+
if (genapic == &apic_flat) {
if (max_physical_apicid >= 8)
genapic = &apic_physflat;
diff --git a/arch/x86/kernel/genx2apic_cluster.c b/arch/x86/kernel/genx2apic_cluster.c
index ef3f318..fed9f68 100644
--- a/arch/x86/kernel/genx2apic_cluster.c
+++ b/arch/x86/kernel/genx2apic_cluster.c
@@ -14,7 +14,7 @@
static int __init x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
- if (cpu_has_x2apic && intr_remapping_enabled)
+ if (cpu_has_x2apic)
return 1;
return 0;
diff --git a/arch/x86/kernel/genx2apic_phys.c b/arch/x86/kernel/genx2apic_phys.c
index 3229c68..958d537 100644
--- a/arch/x86/kernel/genx2apic_phys.c
+++ b/arch/x86/kernel/genx2apic_phys.c
@@ -21,7 +21,7 @@
static int __init x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
- if (cpu_has_x2apic && intr_remapping_enabled && x2apic_phys)
+ if (cpu_has_x2apic && x2apic_phys)
return 1;
return 0;