5 files changed, 18 insertions, 21 deletions
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index dce1bf696cc..a6208dc7463 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -146,7 +146,7 @@ static inline u64 native_x2apic_icr_read(void)
 	return val;
 }
 
-extern int x2apic;
+extern int x2apic, x2apic_phys;
 extern void check_x2apic(void);
 extern void enable_x2apic(void);
 extern void enable_IR_x2apic(void);
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index c12823eb55b..47c2d12e5cf 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1265,14 +1265,7 @@ void __cpuinit end_local_APIC_setup(void)
 #ifdef CONFIG_X86_X2APIC
 void check_x2apic(void)
 {
-	int msr, msr2;
-
-	if (!cpu_has_x2apic)
-		return;
-
-	rdmsr(MSR_IA32_APICBASE, msr, msr2);
-
-	if (msr & X2APIC_ENABLE) {
+	if (x2apic_enabled()) {
 		pr_info("x2apic enabled by BIOS, switching to x2apic ops\n");
 		x2apic_preenabled = x2apic = 1;
 	}
diff --git a/arch/x86/kernel/apic/probe_64.c b/arch/x86/kernel/apic/probe_64.c
index 70935dd904d..e7c163661c7 100644
--- a/arch/x86/kernel/apic/probe_64.c
+++ b/arch/x86/kernel/apic/probe_64.c
@@ -50,9 +50,16 @@ static struct apic *apic_probe[] __initdata = {
 void __init default_setup_apic_routing(void)
 {
 #ifdef CONFIG_X86_X2APIC
-	if (apic == &apic_x2apic_phys || apic == &apic_x2apic_cluster) {
-		if (!intr_remapping_enabled)
-			apic = &apic_flat;
+	if (x2apic && (apic != &apic_x2apic_phys &&
+#ifdef CONFIG_X86_UV
+		       apic != &apic_x2apic_uv_x &&
+#endif
+		       apic != &apic_x2apic_cluster)) {
+		if (x2apic_phys)
+			apic = &apic_x2apic_phys;
+		else
+			apic = &apic_x2apic_cluster;
+		printk(KERN_INFO "Setting APIC routing to %s\n", apic->name);
 	}
 #endif
 
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index 4e39d9ad4d5..354b9c45601 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -14,10 +14,7 @@ DEFINE_PER_CPU(u32, x86_cpu_to_logical_apicid);
 
 static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
-	if (cpu_has_x2apic)
-		return 1;
-
-	return 0;
+	return x2apic_enabled();
 }
 
 /* Start with all IRQs pointing to boot CPU.  IRQ balancing will shift them. */
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index d2d52eb9f7e..5bcb174409b 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -10,7 +10,7 @@
 #include <asm/apic.h>
 #include <asm/ipi.h>
 
-static int x2apic_phys;
+int x2apic_phys;
 
 static int set_x2apic_phys_mode(char *arg)
 {
@@ -21,10 +21,10 @@ early_param("x2apic_phys", set_x2apic_phys_mode);
 
 static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
-	if (cpu_has_x2apic && x2apic_phys)
-		return 1;
-
-	return 0;
+	if (x2apic_phys)
+		return x2apic_enabled();
+	else
+		return 0;
 }
 
 /* Start with all IRQs pointing to boot CPU.  IRQ balancing will shift them. */