[PATCH v2 41/44] intel_idle: Add force_irq_on module param

[Peter Zijlstra]

For testing purposes.

Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org>
---
 drivers/idle/intel_idle.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -1787,6 +1787,9 @@ static bool __init intel_idle_verify_cst
        return true;
 }
 
+static bool force_irq_on __read_mostly;
+module_param(force_irq_on, bool, 0444);
+
 static void __init intel_idle_init_cstates_icpu(struct cpuidle_driver *drv)
 {
        int cstate;
@@ -1838,8 +1841,10 @@ static void __init intel_idle_init_cstat
                /* Structure copy. */
                drv->states[drv->state_count] = cpuidle_state_table[cstate];
 
-               if (cpuidle_state_table[cstate].flags & CPUIDLE_FLAG_IRQ_ENABLE)
+               if ((cpuidle_state_table[cstate].flags & 
CPUIDLE_FLAG_IRQ_ENABLE) || force_irq_on) {
+                       printk("intel_idle: forced intel_idle_irq for state 
%d\n", cstate);
                        drv->states[drv->state_count].enter = intel_idle_irq;
+               }
 
                if (cpu_feature_enabled(X86_FEATURE_KERNEL_IBRS) &&
                    cpuidle_state_table[cstate].flags & CPUIDLE_FLAG_IBRS) {