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-rw-r--r--arch/x86/include/asm/apic.h2
-rw-r--r--arch/x86/kernel/apic/apic.c9
-rw-r--r--arch/x86/kernel/apic/probe_64.c13
-rw-r--r--arch/x86/kernel/apic/x2apic_cluster.c5
-rw-r--r--arch/x86/kernel/apic/x2apic_phys.c10
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. */