From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
To: rjw@rjwysocki.net, len.brown@intel.com, viresh.kumar@linaro.org
Cc: linux-pm@vger.kernel.org,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Subject: [PATCH 4/4] cpufreq: intel_pstate: Add powersave policy support
Date: Fri, 4 Dec 2015 16:08:38 -0800 [thread overview]
Message-ID: <1449274118-15575-5-git-send-email-srinivas.pandruvada@linux.intel.com> (raw)
In-Reply-To: <1449274118-15575-1-git-send-email-srinivas.pandruvada@linux.intel.com>
Implement support for powersave policy. The powersave policy will limit
the max performance to P-State = Maximum Efficiency Ratio.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
drivers/cpufreq/intel_pstate.c | 49 ++++++++++++++++++++++++++++++++++--------
1 file changed, 40 insertions(+), 9 deletions(-)
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 61b7118..417d020 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -189,8 +189,23 @@ static struct perf_limits ondemand_limits = {
.min_sysfs_pct = 0,
};
-#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
+static struct perf_limits powersave_limits = {
+ .no_turbo = 1,
+ .turbo_disabled = 1,
+ .max_perf_pct = 0,
+ .max_perf = int_tofp(1),
+ .min_perf_pct = 0,
+ .min_perf = int_tofp(1),
+ .max_policy_pct = 0,
+ .max_sysfs_pct = 0,
+ .min_policy_pct = 0,
+ .min_sysfs_pct = 0,
+};
+
+#if defined(CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE)
static struct perf_limits *limits = &performance_limits;
+#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE)
+static struct perf_limits *limits = &powersave_limits;
#else
static struct perf_limits *limits = &ondemand_limits;
#endif
@@ -1143,13 +1158,26 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy)
return 0;
}
- pr_debug("intel_pstate: set ondemand\n");
- limits = &ondemand_limits;
- limits->min_policy_pct = (policy->min * 100) / policy->cpuinfo.max_freq;
- limits->min_policy_pct = clamp_t(int, limits->min_policy_pct, 0 , 100);
- limits->max_policy_pct = DIV_ROUND_UP(policy->max * 100,
- policy->cpuinfo.max_freq);
- limits->max_policy_pct = clamp_t(int, limits->max_policy_pct, 0 , 100);
+ if (policy->policy == CPUFREQ_POLICY_POWERSAVE) {
+ pr_debug("intel_pstate: set powersave\n");
+ limits = &powersave_limits;
+ limits->min_policy_pct = (policy->cpuinfo.min_freq * 100) /
+ policy->cpuinfo.max_freq;
+ limits->min_policy_pct = clamp_t(int, limits->min_policy_pct,
+ 0, 100);
+ limits->max_policy_pct = limits->min_policy_pct;
+ } else {
+ pr_debug("intel_pstate: set ondemand\n");
+ limits = &ondemand_limits;
+ limits->min_policy_pct = (policy->min * 100) /
+ policy->cpuinfo.max_freq;
+ limits->min_policy_pct = clamp_t(int, limits->min_policy_pct,
+ 0, 100);
+ limits->max_policy_pct = DIV_ROUND_UP(policy->max * 100,
+ policy->cpuinfo.max_freq);
+ limits->max_policy_pct = clamp_t(int, limits->max_policy_pct,
+ 0, 100);
+ }
/* Normalize user input to [min_policy_pct, max_policy_pct] */
limits->min_perf_pct = max(limits->min_policy_pct,
@@ -1181,7 +1209,8 @@ static int intel_pstate_verify_policy(struct cpufreq_policy *policy)
cpufreq_verify_within_cpu_limits(policy);
if (policy->policy != CPUFREQ_POLICY_ONDEMAND &&
- policy->policy != CPUFREQ_POLICY_PERFORMANCE)
+ policy->policy != CPUFREQ_POLICY_PERFORMANCE &&
+ policy->policy != CPUFREQ_POLICY_POWERSAVE)
return -EINVAL;
return 0;
@@ -1234,6 +1263,8 @@ static int intel_pstate_available_policies(u8 *mask)
{
*mask = CPUFREQ_POLICY_PERFORMANCE | CPUFREQ_POLICY_ONDEMAND;
+ if (!hwp_active)
+ *mask |= CPUFREQ_POLICY_POWERSAVE;
return 0;
}
--
2.4.3
next prev parent reply other threads:[~2015-12-05 0:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-05 0:08 [PATCH 0/4] cpufreq governors and Intel P state driver compatibility Srinivas Pandruvada
2015-12-05 0:08 ` [PATCH 1/4] cpufreq: Add configurable generic policies Srinivas Pandruvada
2015-12-07 9:33 ` Viresh Kumar
2015-12-07 15:03 ` Srinivas Pandruvada
2015-12-05 0:08 ` [PATCH 2/4] cpufreq: Add ondemand as a generic policy Srinivas Pandruvada
2015-12-07 9:34 ` Viresh Kumar
2015-12-05 0:08 ` [PATCH 3/4] cpufreq: intel_pstate: Change powersave to ondemand policy Srinivas Pandruvada
2015-12-05 0:08 ` Srinivas Pandruvada [this message]
2015-12-08 14:35 ` [PATCH 0/4] cpufreq governors and Intel P state driver compatibility Thomas Renninger
2015-12-08 17:43 ` Srinivas Pandruvada
2015-12-09 15:02 ` Thomas Renninger
2015-12-09 16:12 ` Srinivas Pandruvada
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