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cpufreq: intel_pstate: Enable HWP by default

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commit 7791e4aa59ad724e0b4c8b4dea547a5735108972 upstream.

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: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Srinivas Pandruvada 2016-02-25 15:09:19 -08:00 • committed by Greg Kroah-Hartman
parent eae31bc183
commit f5a80c5d9c
1 changed files with 22 additions and 12 deletions
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34
drivers/cpufreq/intel_pstate.c
View file

@ -1361,6 +1361,11 @@ 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;
@ -1370,17 +1375,16 @@ 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);
@ -1389,17 +1393,20 @@ 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;
@ -1410,6 +1417,9 @@ 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();