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Commit 2e7c2838 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

x86-64: add "local_apic_timer_c2_ok" here too 



Needed for any architecture that claims ARCH_APICTIMER_STOPS_ON_C3,
not just i386.

I'm hoping Thomas will clean this up a bit later..

Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent cad6a84a

Documentation/kernel-parameters.txt

+1 −1
Original line number Diff line number Diff line
@@ -780,7 +780,7 @@ and is between 256 and 4096 characters. It is defined in the file 
	lapic		[IA-32,APIC] Enable the local APIC even if BIOS

			disabled it.



	lapic_timer_c2_ok	[IA-32,APIC] trust the local apic timer in

	lapic_timer_c2_ok	[IA-32,x86-64,APIC] trust the local apic timer in

			C2 power state.



	lasi=		[HW,SCSI] PARISC LASI driver for the 53c700 chip

arch/x86_64/kernel/apic.c

+11 −0
Original line number Diff line number Diff line
@@ -47,6 +47,10 @@ int apic_calibrate_pmtmr __initdata; 


int disable_apic_timer __initdata;



/* Local APIC timer works in C2? */

int local_apic_timer_c2_ok;

EXPORT_SYMBOL_GPL(local_apic_timer_c2_ok);



static struct resource *ioapic_resources;

static struct resource lapic_resource = {

	.name = "Local APIC",
@@ -1192,6 +1196,13 @@ static __init int setup_nolapic(char *str) 
} 

early_param("nolapic", setup_nolapic);



static int __init parse_lapic_timer_c2_ok(char *arg)

{

	local_apic_timer_c2_ok = 1;

	return 0;

}

early_param("lapic_timer_c2_ok", parse_lapic_timer_c2_ok);



static __init int setup_noapictimer(char *str) 

{ 

	if (str[0] != ' ' && str[0] != 0)

include/asm-x86_64/apic.h

+1 −0
Original line number Diff line number Diff line
@@ -102,5 +102,6 @@ void switch_ipi_to_APIC_timer(void *cpumask); 
#define ARCH_APICTIMER_STOPS_ON_C3	1



extern unsigned boot_cpu_id;

extern int local_apic_timer_c2_ok;



#endif /* __ASM_APIC_H */