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-rw-r--r--arch/arc/kernel/smp.c25
1 files changed, 18 insertions, 7 deletions
diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c
index 4cb3add77c75..f183cc648851 100644
--- a/arch/arc/kernel/smp.c
+++ b/arch/arc/kernel/smp.c
@@ -126,11 +126,6 @@ void start_kernel_secondary(void)
current->active_mm = mm;
cpumask_set_cpu(cpu, mm_cpumask(mm));
- notify_cpu_starting(cpu);
- set_cpu_online(cpu, true);
-
- pr_info("## CPU%u LIVE ##: Executing Code...\n", cpu);
-
/* Some SMP H/w setup - for each cpu */
if (plat_smp_ops.init_per_cpu)
plat_smp_ops.init_per_cpu(cpu);
@@ -138,7 +133,10 @@ void start_kernel_secondary(void)
if (machine_desc->init_per_cpu)
machine_desc->init_per_cpu(cpu);
- arc_local_timer_setup();
+ notify_cpu_starting(cpu);
+ set_cpu_online(cpu, true);
+
+ pr_info("## CPU%u LIVE ##: Executing Code...\n", cpu);
local_irq_enable();
preempt_disable();
@@ -346,6 +344,10 @@ irqreturn_t do_IPI(int irq, void *dev_id)
/*
* API called by platform code to hookup arch-common ISR to their IPI IRQ
+ *
+ * Note: If IPI is provided by platform (vs. say ARC MCIP), their intc setup/map
+ * function needs to call call irq_set_percpu_devid() for IPI IRQ, otherwise
+ * request_percpu_irq() below will fail
*/
static DEFINE_PER_CPU(int, ipi_dev);
@@ -353,7 +355,16 @@ int smp_ipi_irq_setup(int cpu, int irq)
{
int *dev = per_cpu_ptr(&ipi_dev, cpu);
- arc_request_percpu_irq(irq, cpu, do_IPI, "IPI Interrupt", dev);
+ /* Boot cpu calls request, all call enable */
+ if (!cpu) {
+ int rc;
+
+ rc = request_percpu_irq(irq, do_IPI, "IPI Interrupt", dev);
+ if (rc)
+ panic("Percpu IRQ request failed for %d\n", irq);
+ }
+
+ enable_percpu_irq(irq, 0);
return 0;
}