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Commit 914bebfa authored by Yinghai Lu's avatar Yinghai Lu Committed by Ingo Molnar
Browse files

x86: use disable_apic in 32bit 



change the enable_local_apic to static force_enable_local_apic for 32bit

Signed-off-by: default avatarYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent a04ad82d

arch/x86/kernel/apic_32.c

+8 −7
Original line number Diff line number Diff line
@@ -55,9 +55,10 @@ unsigned long mp_lapic_addr; 
/*

 * Knob to control our willingness to enable the local APIC.

 *

 * -1=force-disable, +1=force-enable

 * +1=force-enable

 */

int enable_local_apic;

static int force_enable_local_apic;

int disable_apic;



/* Local APIC timer verification ok */

static int local_apic_timer_verify_ok;
@@ -1099,7 +1100,7 @@ static int __init detect_init_APIC(void) 
	u32 h, l, features;



	/* Disabled by kernel option? */

	if (enable_local_apic < 0)

	if (disable_apic)

		return -1;



	switch (boot_cpu_data.x86_vendor) {
@@ -1122,7 +1123,7 @@ static int __init detect_init_APIC(void) 
		 * Over-ride BIOS and try to enable the local APIC only if

		 * "lapic" specified.

		 */

		if (enable_local_apic <= 0) {

		if (!force_enable_local_apic) {

			printk(KERN_INFO "Local APIC disabled by BIOS -- "

			       "you can enable it with \"lapic\"\n");

			return -1;
@@ -1208,7 +1209,7 @@ int apic_version[MAX_APICS]; 


int __init APIC_init_uniprocessor(void)

{

	if (enable_local_apic < 0)

	if (disable_apic)

		clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);



	if (!smp_found_config && !cpu_has_apic)
@@ -1682,14 +1683,14 @@ static void apic_pm_activate(void) { } 
 */

static int __init parse_lapic(char *arg)

{

	enable_local_apic = 1;

	force_enable_local_apic = 1;

	return 0;

}

early_param("lapic", parse_lapic);



static int __init parse_nolapic(char *arg)

{

	enable_local_apic = -1;

	disable_apic = 1;

	clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);

	return 0;

}

arch/x86/kernel/setup.c

+0 −4
Original line number Diff line number Diff line
@@ -598,11 +598,7 @@ void __init setup_arch(char **cmdline_p) 


	if (acpi_mps_check()) {

#ifdef CONFIG_X86_LOCAL_APIC

#ifdef CONFIG_X86_32

		enable_local_apic = -1;

#else

		disable_apic = 1;

#endif

#endif

		clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);

	}

include/asm-x86/apic.h

+0 −4
Original line number Diff line number Diff line
@@ -40,11 +40,7 @@ extern int local_apic_timer_c2_ok; 


extern int ioapic_force;



#ifdef CONFIG_X86_64

extern int disable_apic;

#else

extern int enable_local_apic;

#endif

/*

 * Basic functions accessing APICs.

 */