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[PATCH] x86_64: Force broadcast timer on AMD systems with C3 too. 

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen 2006-03-25 16:31:07 +01:00 committed by Linus Torvalds
parent 7682968b7d
commit bd66334769
1 changed files with 15 additions and 10 deletions
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25
drivers/acpi/processor_idle.c
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@ -876,14 +876,11 @@ static int acpi_processor_power_verify(struct acpi_processor *pr)
{ {
unsigned int i; unsigned int i;
unsigned int working = 0; unsigned int working = 0;
int timer_broadcast = 0;
#ifdef ARCH_APICTIMER_STOPS_ON_C3
struct cpuinfo_x86 *c = cpu_data + pr->id;
cpumask_t mask = cpumask_of_cpu(pr->id); cpumask_t mask = cpumask_of_cpu(pr->id);
if (c->x86_vendor == X86_VENDOR_INTEL) { #ifdef ARCH_APICTIMER_STOPS_ON_C3
on_each_cpu(switch_ipi_to_APIC_timer, &mask, 1, 1); on_each_cpu(switch_ipi_to_APIC_timer, &mask, 1, 1);
}
#endif #endif
for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) { for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) {
@ -896,15 +893,20 @@ static int acpi_processor_power_verify(struct acpi_processor *pr)
case ACPI_STATE_C2: case ACPI_STATE_C2:
acpi_processor_power_verify_c2(cx); acpi_processor_power_verify_c2(cx);
#ifdef ARCH_APICTIMER_STOPS_ON_C3
/* Some AMD systems fake C3 as C2, but still
have timer troubles */
if (cx->valid &&
boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
timer_broadcast++;
#endif
break; break;
case ACPI_STATE_C3: case ACPI_STATE_C3:
acpi_processor_power_verify_c3(pr, cx); acpi_processor_power_verify_c3(pr, cx);
#ifdef ARCH_APICTIMER_STOPS_ON_C3 #ifdef ARCH_APICTIMER_STOPS_ON_C3
if (cx->valid && c->x86_vendor == X86_VENDOR_INTEL) { if (cx->valid)
on_each_cpu(switch_APIC_timer_to_ipi, timer_broadcast++;
&mask, 1, 1);
}
#endif #endif
break; break;
} }
@ -913,6 +915,9 @@ static int acpi_processor_power_verify(struct acpi_processor *pr)
working++; working++;
} }
if (timer_broadcast)
on_each_cpu(switch_APIC_timer_to_ipi, &mask, 1, 1);
return (working); return (working);
} }