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authorPeter Zijlstra <peterz@infradead.org>2023-01-12 22:43:57 +0300
committerIngo Molnar <mingo@kernel.org>2023-01-13 13:48:17 +0300
commit365bd03ff63fb7433a49c453472cf54830b677bf (patch)
treef07e3d32f87ec8dff2ccc200f77f80637e565435 /drivers/idle
parentf18b0d7ee815abb33eb1cc540fdde64fbb922d1a (diff)
downloadlinux-365bd03ff63fb7433a49c453472cf54830b677bf.tar.xz
intel_idle: Add force_irq_on module param
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
Diffstat (limited to 'drivers/idle')
-rw-r--r--drivers/idle/intel_idle.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 7b996a09fa69..e2d64a8f9422 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -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) {