[PATCH v2 41/44] intel_idle: Add force_irq_on module param
From: Peter Zijlstra <peterz@infradead.org>
Date: 2022-09-19 10:20:14
Also in:
linux-acpi, linux-alpha, linux-arch, linux-arm-msm, linux-clk, linux-m68k, linux-mips, linux-omap, linux-perf-users, linux-pm, linux-riscv, linux-s390, linux-sh, linux-tegra, linux-um, lkml, loongarch, sparclinux, virtualization
For testing purposes. Signed-off-by: Peter Zijlstra (Intel) <peterz@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) {