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x86/apic: Move x2apic code to one place 

Having several disjunct pieces of code for x2apic support makes
reading the code unnecessarily hard. Move it to one ifdeffed section.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Borislav Petkov <bp@alien8.de>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Tony Luck <tony.luck@intel.com>
Link: http://lkml.kernel.org/r/20150115211702.445212133@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2015-01-15 21:22:12 +00:00
parent 81a46dd824
commit bfb0507029
1 changed files with 28 additions and 30 deletions
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58
arch/x86/kernel/apic/apic.c
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@ -134,9 +134,6 @@ static inline void imcr_apic_to_pic(void)
*/
static int force_enable_local_apic __initdata;
/* Control whether x2APIC mode is enabled or not */
static bool nox2apic __initdata;
/*
* APIC command line parameters
*/
@ -161,33 +158,6 @@ static __init int setup_apicpmtimer(char *s)
__setup("apicpmtimer", setup_apicpmtimer);
#endif
#ifdef CONFIG_X86_X2APIC
int x2apic_mode;
/* x2apic enabled before OS handover */
int x2apic_preenabled;
static int x2apic_disabled;
static int __init setup_nox2apic(char *str)
{
if (x2apic_enabled()) {
int apicid = native_apic_msr_read(APIC_ID);
if (apicid >= 255) {
pr_warning("Apicid: %08x, cannot enforce nox2apic\n",
apicid);
return 0;
}
pr_warning("x2apic already enabled. will disable it\n");
} else
setup_clear_cpu_cap(X86_FEATURE_X2APIC);
nox2apic = true;
return 0;
}
early_param("nox2apic", setup_nox2apic);
#endif
unsigned long mp_lapic_addr;
int disable_apic;
/* Disable local APIC timer from the kernel commandline or via dmi quirk */
@ -1504,7 +1474,35 @@ void __init bsp_end_local_APIC_setup(void)
}
/* Control whether x2APIC mode is enabled or not */
static bool nox2apic __initdata;
#ifdef CONFIG_X86_X2APIC
int x2apic_mode;
/* x2apic enabled before OS handover */
int x2apic_preenabled;
static int x2apic_disabled;
static int __init setup_nox2apic(char *str)
{
if (x2apic_enabled()) {
int apicid = native_apic_msr_read(APIC_ID);
if (apicid >= 255) {
pr_warning("Apicid: %08x, cannot enforce nox2apic\n",
apicid);
return 0;
}
pr_warning("x2apic already enabled. will disable it\n");
} else
setup_clear_cpu_cap(X86_FEATURE_X2APIC);
nox2apic = true;
return 0;
}
early_param("nox2apic", setup_nox2apic);
/*
* Need to disable xapic and x2apic at the same time and then enable xapic mode
*/