Add a new module parameter called "no_acpi" to the intel_idle driver
to allow the driver to be prevented from using ACPI _CST via kernel
command line.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
#ifdef CONFIG_ACPI_PROCESSOR_CSTATE
#include <acpi/processor.h>
+static bool no_acpi __read_mostly;
+module_param(no_acpi, bool, 0444);
+MODULE_PARM_DESC(no_acpi, "Do not use ACPI _CST for building the idle states list");
+
static struct acpi_processor_power acpi_state_table;
/**
{
unsigned int cpu;
+ if (no_acpi) {
+ pr_debug("Not allowed to use ACPI _CST\n");
+ return false;
+ }
+
for_each_possible_cpu(cpu) {
struct acpi_processor *pr = per_cpu(processors, cpu);