Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
---
arch/x86/kernel/apic_64.c | 35 +++++++++++++++++++++++------------
1 files changed, 23 insertions(+), 12 deletions(-)
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c
index c40a900..d3ec746 100644
--- a/arch/x86/kernel/apic_64.c
+++ b/arch/x86/kernel/apic_64.c
@@ -82,10 +82,23 @@ static __init int setup_apicpmtimer(char *s)
__setup("apicpmtimer", setup_apicpmtimer);
#endif
-int disable_x2apic;
+#ifdef CONFIG_X86_64
+#define HAVE_X2APIC
+#endif
+
+#ifdef HAVE_X2APIC
int x2apic;
/* x2apic enabled before OS handover */
int x2apic_preenabled;
+int disable_x2apic;
+static __init int setup_nox2apic(char *str)
+{
+ disable_x2apic = 1;
+ setup_clear_cpu_cap(X86_FEATURE_X2APIC);
+ return 0;
+}
+early_param("nox2apic", setup_nox2apic);
+#endif
unsigned long mp_lapic_addr;
int disable_apic;
@@ -228,6 +241,7 @@ static struct apic_ops xapic_ops = {
struct apic_ops __read_mostly *apic_ops = &xapic_ops;
EXPORT_SYMBOL_GPL(apic_ops);
+#ifdef HAVE_X2APIC
static void x2apic_wait_icr_idle(void)
{
/* no need to wait for icr idle in x2apic */
@@ -261,6 +275,7 @@ static struct apic_ops x2apic_ops = {
.wait_icr_idle = x2apic_wait_icr_idle,
.safe_wait_icr_idle = safe_x2apic_wait_icr_idle,
};
+#endif
/**
* enable_NMI_through_LVT0 - enable NMI through local vector table 0
@@ -1125,6 +1140,7 @@ void __cpuinit end_local_APIC_setup(void)
apic_pm_activate();
}
+#ifdef HAVE_X2APIC
void check_x2apic(void)
{
int msr, msr2;
@@ -1243,6 +1259,7 @@ end:
return;
}
+#endif /* HAVE_X2APIC */
/*
* Detect and enable local APICs on non-SMP boards.
@@ -1291,10 +1308,12 @@ void __init early_init_lapic_mapping(void)
*/
void __init init_apic_mappings(void)
{
+#ifdef HAVE_X2APIC
if (x2apic) {
boot_cpu_physical_apicid = read_apic_id();
return;
}
+#endif
/*
* If no local APIC can be found then set up a fake all
@@ -1335,8 +1354,9 @@ int __init APIC_init_uniprocessor(void)
printk(KERN_INFO "Apic disabled by BIOS\n");
return -1;
}
-
+#ifdef HAVE_X2APIC
enable_IR_x2apic();
+#endif
setup_apic_routing();
verify_local_APIC();
@@ -1672,7 +1692,7 @@ static int lapic_resume(struct sys_device *dev)
local_irq_save(flags);
-#ifdef CONFIG_X86_64
+#ifdef HAVE_X2APIC
if (x2apic)
enable_x2apic();
else
@@ -1836,15 +1856,6 @@ __cpuinit int apic_is_clustered_box(void)
return (clusters > 2);
}
-static __init int setup_nox2apic(char *str)
-{
- disable_x2apic = 1;
- clear_cpu_cap(&boot_cpu_data, X86_FEATURE_X2APIC);
- return 0;
-}
-early_param("nox2apic", setup_nox2apic);
-
-
/*
* APIC command line parameters
*/
--
1.5.4.5
--
