srivatsa.bhat at linux
Jun 1, 2012, 2:14 AM
Post #1 of 2
(32 views)
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[PATCH 18/27] powerpc, smpboot: Use generic SMP booting infrastructure
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From: Nikunj A. Dadhania <nikunj [at] linux>
Convert powerpc to use the generic framework to boot secondary CPUs.
Signed-off-by: Nikunj A. Dadhania <nikunj [at] linux>
Cc: Benjamin Herrenschmidt <benh [at] kernel>
Cc: Paul Mackerras <paulus [at] samba>
Cc: Thomas Gleixner <tglx [at] linutronix>
Cc: Yong Zhang <yong.zhang0 [at] gmail>
Cc: Paul Gortmaker <paul.gortmaker [at] windriver>
Cc: linuxppc-dev [at] lists
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat [at] linux>
---
arch/powerpc/kernel/smp.c | 26 +++++++++++++++-----------
1 files changed, 15 insertions(+), 11 deletions(-)
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 1928058a..96c3718 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -544,16 +544,18 @@ static struct device_node *cpu_to_l2cache(int cpu)
/* Activate a secondary processor. */
void __devinit start_secondary(void *unused)
{
+ smpboot_start_secondary(unused);
+}
+
+void __cpuinit __cpu_pre_starting(void *unused)
+{
unsigned int cpu = smp_processor_id();
- struct device_node *l2_cache;
- int i, base;
atomic_inc(&init_mm.mm_count);
current->active_mm = &init_mm;
smp_store_cpu_info(cpu);
set_dec(tb_ticks_per_jiffy);
- preempt_disable();
cpu_callin_map[cpu] = 1;
if (smp_ops->setup_cpu)
@@ -567,8 +569,16 @@ void __devinit start_secondary(void *unused)
if (system_state == SYSTEM_RUNNING)
vdso_data->processorCount++;
#endif
- notify_cpu_starting(cpu);
- set_cpu_online(cpu, true);
+}
+
+void __cpuinit __cpu_post_online(void *unused)
+{
+ unsigned int cpu;
+ struct device_node *l2_cache;
+ int i, base;
+
+ cpu = smp_processor_id();
+
/* Update sibling maps */
base = cpu_first_thread_sibling(cpu);
for (i = 0; i < threads_per_core; i++) {
@@ -596,12 +606,6 @@ void __devinit start_secondary(void *unused)
of_node_put(np);
}
of_node_put(l2_cache);
-
- local_irq_enable();
-
- cpu_idle();
-
- BUG();
}
int setup_profiling_timer(unsigned int multiplier)
--
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