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Commit ba88d433 authored by Kristen Carlson Accardi's avatar Kristen Carlson Accardi Committed by Rafael J. Wysocki
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intel_pstate: enable HWP per CPU 



HWP previously was only enabled at driver load time, on the boot
CPU, however, HWP must be enabled per package. Move the code to
enable HWP to the cpufreq driver init path so that it will be
called per CPU.

Signed-off-by: default avatarKristen Carlson Accardi <kristen@linux.intel.com>
Tested-by: default avatarDavid Zhuang <david.zhuang@oracle.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 3a5f5b2e

drivers/cpufreq/intel_pstate.c

+7 −4
Original line number Diff line number Diff line
@@ -484,12 +484,11 @@ static void __init intel_pstate_sysfs_expose_params(void) 
}

/************************** sysfs end ************************/



static void intel_pstate_hwp_enable(void)

static void intel_pstate_hwp_enable(struct cpudata *cpudata)

{

	hwp_active++;

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



	wrmsrl( MSR_PM_ENABLE, 0x1);

	wrmsrl_on_cpu(cpudata->cpu, MSR_PM_ENABLE, 0x1);

}



static int byt_get_min_pstate(void)
@@ -932,6 +931,10 @@ static int intel_pstate_init_cpu(unsigned int cpunum) 
	cpu = all_cpu_data[cpunum];



	cpu->cpu = cpunum;



	if (hwp_active)

		intel_pstate_hwp_enable(cpu);



	intel_pstate_get_cpu_pstates(cpu);



	init_timer_deferrable(&cpu->timer);
@@ -1245,7 +1248,7 @@ static int __init intel_pstate_init(void) 
		return -ENOMEM;



	if (static_cpu_has_safe(X86_FEATURE_HWP) && !no_hwp)

		intel_pstate_hwp_enable();

		hwp_active++;



	if (!hwp_active && hwp_only)

		goto out;