Commit 365bd03f authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

intel_idle: Add force_irq_on module param 



For testing purposes.

Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Tested-by: default avatarTony Lindgren <tony@atomide.com>
Tested-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Acked-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: default avatarFrederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20230112195541.967699392@infradead.org
parent f18b0d7e

drivers/idle/intel_idle.c

+6 −1
Original line number Diff line number Diff line
@@ -1837,6 +1837,9 @@ static bool __init intel_idle_verify_cstate(unsigned int mwait_hint) 
	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;
@@ -1889,8 +1892,10 @@ static void __init intel_idle_init_cstates_icpu(struct cpuidle_driver *drv) 
		/* 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) {