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| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2006-01-11 22:44:24 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 19:04:54 -0800 |
| commit | d25bf7e5fe73b5b6d2246ab0be08ae35d718456b (patch) | |
| tree | 472749fef9b017e9a4d94f9e07a29dc44c3294cb /arch/x86_64/kernel/time.c | |
| parent | 6eb0a0fd059598ee0d49c6283ce25cccd743e9fc (diff) | |
| download | linux-rt-d25bf7e5fe73b5b6d2246ab0be08ae35d718456b.tar.gz | |
[PATCH] x86_64: Handle missing local APIC timer interrupts on C3 state
Whenever we see that a CPU is capable of C3 (during ACPI cstate init), we
disable local APIC timer and switch to using a broadcast from external timer
interrupt (IRQ 0).
Patch below adds the code for x86_64.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/time.c')
| -rw-r--r-- | arch/x86_64/kernel/time.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c index 43c9fa0f8d5f..211bf0e51d9d 100644 --- a/arch/x86_64/kernel/time.c +++ b/arch/x86_64/kernel/time.c @@ -471,6 +471,11 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) write_sequnlock(&xtime_lock); +#ifdef CONFIG_X86_LOCAL_APIC + if (using_apic_timer) + smp_send_timer_broadcast_ipi(); +#endif + return IRQ_HANDLED; } |