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authorThomas Gleixner <tglx@linutronix.de>2007-10-17 18:04:32 +0200
committerThomas Gleixner <tglx@inhelltoy.tec.linutronix.de>2007-10-17 20:15:13 +0200
commit3dfbc88464934fb6924a388bc03961d44f387926 (patch)
tree3ddb9a50bb2df909d6e629783bd41301541feceb
parente6d5a11dad44b8ae18ca8fc4ecb72ccccfa0a2d2 (diff)
x86: C1E late detection fix. Really switch off lapic timer
Doh, I completely missed that devices marked DUMMY are not running the set_mode function. So we force broadcasting, but we keep the local APIC timer running. Let the clock event layer mark the device _after_ switching it off. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/x86/kernel/apic_64.c3
-rw-r--r--kernel/time/tick-broadcast.c18
2 files changed, 4 insertions, 17 deletions
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c
index 09b82093bc7..2250c654eac 100644
--- a/arch/x86/kernel/apic_64.c
+++ b/arch/x86/kernel/apic_64.c
@@ -974,15 +974,12 @@ void __init setup_boot_APIC_clock (void)
*/
void __cpuinit check_boot_apic_timer_broadcast(void)
{
- struct clock_event_device *levt = &per_cpu(lapic_events, boot_cpu_id);
-
if (!disable_apic_timer ||
(lapic_clockevent.features & CLOCK_EVT_FEAT_DUMMY))
return;
printk(KERN_INFO "AMD C1E detected late. Force timer broadcast.\n");
lapic_clockevent.features |= CLOCK_EVT_FEAT_DUMMY;
- levt->features |= CLOCK_EVT_FEAT_DUMMY;
local_irq_enable();
clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_FORCE, &boot_cpu_id);
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index fab9dd8bbd6..8cfb8b2ce77 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -222,20 +222,8 @@ static void tick_do_broadcast_on_off(void *why)
if (!dev || !(dev->features & CLOCK_EVT_FEAT_C3STOP))
goto out;
- /*
- * Defect device ?
- */
- if (!tick_device_is_functional(dev)) {
- /*
- * AMD C1E wreckage fixup:
- *
- * Device was registered functional in the first
- * place. Now the secondary CPU detected the C1E
- * misfeature and notifies us to fix it up
- */
- if (*reason != CLOCK_EVT_NOTIFY_BROADCAST_FORCE)
- goto out;
- }
+ if (!tick_device_is_functional(dev))
+ goto out;
switch (*reason) {
case CLOCK_EVT_NOTIFY_BROADCAST_ON:
@@ -246,6 +234,8 @@ static void tick_do_broadcast_on_off(void *why)
clockevents_set_mode(dev,
CLOCK_EVT_MODE_SHUTDOWN);
}
+ if (*reason == CLOCK_EVT_NOTIFY_BROADCAST_FORCE)
+ dev->features |= CLOCK_EVT_FEAT_DUMMY;
break;
case CLOCK_EVT_NOTIFY_BROADCAST_OFF:
if (cpu_isset(cpu, tick_broadcast_mask)) {