diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | 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 c40a900e155..d3ec746aede 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 */ |