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intel_idle: Add force_irq_on module param

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For testing purposes.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Tested-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20230112195541.967699392@infradead.org
This commit is contained in:
Peter Zijlstra 2023-01-12 20:43:57 +01:00 committed by Ingo Molnar
parent f18b0d7ee8
commit 365bd03ff6
1 changed files with 6 additions and 1 deletions
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7
drivers/idle/intel_idle.c
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@ -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) {