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authorAndi Kleen <ak@suse.de>2006-03-25 16:31:07 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 09:10:56 -0800
commitbd6633476922b7b51227f7f704c2546e763ae5ed (patch)
tree4e9844781419fe600c3e9f3e9dab8207f8dd12dd /drivers
parent7682968b7d4d42bb076051b962c3926b4c98539a (diff)
[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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/processor_idle.c25
1 files changed, 15 insertions, 10 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index eb730a80952..2be89589594 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -876,14 +876,11 @@ static int acpi_processor_power_verify(struct acpi_processor *pr)
{
unsigned int i;
unsigned int working = 0;
-
-#ifdef ARCH_APICTIMER_STOPS_ON_C3
- struct cpuinfo_x86 *c = cpu_data + pr->id;
+ int timer_broadcast = 0;
cpumask_t mask = cpumask_of_cpu(pr->id);
- if (c->x86_vendor == X86_VENDOR_INTEL) {
- on_each_cpu(switch_ipi_to_APIC_timer, &mask, 1, 1);
- }
+#ifdef ARCH_APICTIMER_STOPS_ON_C3
+ on_each_cpu(switch_ipi_to_APIC_timer, &mask, 1, 1);
#endif
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:
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;
case ACPI_STATE_C3:
acpi_processor_power_verify_c3(pr, cx);
#ifdef ARCH_APICTIMER_STOPS_ON_C3
- if (cx->valid && c->x86_vendor == X86_VENDOR_INTEL) {
- on_each_cpu(switch_APIC_timer_to_ipi,
- &mask, 1, 1);
- }
+ if (cx->valid)
+ timer_broadcast++;
#endif
break;
}
@@ -913,6 +915,9 @@ static int acpi_processor_power_verify(struct acpi_processor *pr)
working++;
}
+ if (timer_broadcast)
+ on_each_cpu(switch_APIC_timer_to_ipi, &mask, 1, 1);
+
return (working);
}