Commit 7791e4aa authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Rafael J. Wysocki
Browse files

cpufreq: intel_pstate: Enable HWP by default 



If the processor supports HWP, enable it by default without checking
for the cpu model. This will allow to enable HWP in all supported
processors without driver change.

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 34b08705

drivers/cpufreq/intel_pstate.c

+22 −12
Original line number Diff line number Diff line
@@ -1400,6 +1400,11 @@ static inline bool intel_pstate_platform_pwr_mgmt_exists(void) { return false; } 
static inline bool intel_pstate_has_acpi_ppc(void) { return false; }

#endif /* CONFIG_ACPI */



static const struct x86_cpu_id hwp_support_ids[] __initconst = {

	{ X86_VENDOR_INTEL, 6, X86_MODEL_ANY, X86_FEATURE_HWP },

	{}

};



static int __init intel_pstate_init(void)

{

	int cpu, rc = 0;
@@ -1409,17 +1414,16 @@ static int __init intel_pstate_init(void) 
	if (no_load)

		return -ENODEV;



	if (x86_match_cpu(hwp_support_ids) && !no_hwp) {

		copy_cpu_funcs(&core_params.funcs);

		hwp_active++;

		goto hwp_cpu_matched;

	}



	id = x86_match_cpu(intel_pstate_cpu_ids);

	if (!id)

		return -ENODEV;



	/*

	 * The Intel pstate driver will be ignored if the platform

	 * firmware has its own power management modes.

	 */

	if (intel_pstate_platform_pwr_mgmt_exists())

		return -ENODEV;



	cpu_def = (struct cpu_defaults *)id->driver_data;



	copy_pid_params(&cpu_def->pid_policy);
@@ -1428,17 +1432,20 @@ static int __init intel_pstate_init(void) 
	if (intel_pstate_msrs_not_valid())

		return -ENODEV;



hwp_cpu_matched:

	/*

	 * The Intel pstate driver will be ignored if the platform

	 * firmware has its own power management modes.

	 */

	if (intel_pstate_platform_pwr_mgmt_exists())

		return -ENODEV;



	pr_info("Intel P-state driver initializing.\n");



	all_cpu_data = vzalloc(sizeof(void *) * num_possible_cpus());

	if (!all_cpu_data)

		return -ENOMEM;



	if (static_cpu_has_safe(X86_FEATURE_HWP) && !no_hwp) {

		pr_info("intel_pstate: HWP enabled\n");

		hwp_active++;

	}



	if (!hwp_active && hwp_only)

		goto out;
@@ -1449,6 +1456,9 @@ static int __init intel_pstate_init(void) 
	intel_pstate_debug_expose_params();

	intel_pstate_sysfs_expose_params();



	if (hwp_active)

		pr_info("intel_pstate: HWP enabled\n");



	return rc;

out:

	get_online_cpus();

CRA Git | Maintained and supported by SUSTech CRA and CCSE