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intel_pstate: enable HWP per CPU

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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: Kristen Carlson Accardi <kristen@linux.intel.com>
Tested-by: David Zhuang <david.zhuang@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Kristen Carlson Accardi 2015-07-14 09:46:23 -07:00 committed by Rafael J. Wysocki
parent 3a5f5b2e3b
commit ba88d4338f
1 changed files with 7 additions and 4 deletions
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11
drivers/cpufreq/intel_pstate.c
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@ -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;