From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Linux PM <linux-pm@vger.kernel.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
Viresh Kumar <viresh.kumar@linaro.org>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
Zhang Rui <rui.zhang@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
Doug Smythies <dsmythies@telus.net>
Subject: [PATCH v3 2/4] cpufreq: Introduce CPUFREQ_GOV_STRICT_TARGET
Date: Tue, 10 Nov 2020 18:26:10 +0100 [thread overview]
Message-ID: <11987196.RHpQgyFsab@kreacher> (raw)
In-Reply-To: <11312387.r5AVKgp8zO@kreacher>
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Introduce a new governor flag, CPUFREQ_GOV_STRICT_TARGET, for the
governors that want the target frequency to be set exactly to the
given value without leaving any room for adjustments on the hardware
side and set this flag for the powersave and performance governors.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/cpufreq/cpufreq_performance.c | 1 +
drivers/cpufreq/cpufreq_powersave.c | 1 +
include/linux/cpufreq.h | 3 +++
3 files changed, 5 insertions(+)
Index: linux-pm/drivers/cpufreq/cpufreq_performance.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/cpufreq_performance.c
+++ linux-pm/drivers/cpufreq/cpufreq_performance.c
@@ -20,6 +20,7 @@ static void cpufreq_gov_performance_limi
static struct cpufreq_governor cpufreq_gov_performance = {
.name = "performance",
.owner = THIS_MODULE,
+ .flags = CPUFREQ_GOV_STRICT_TARGET,
.limits = cpufreq_gov_performance_limits,
};
Index: linux-pm/drivers/cpufreq/cpufreq_powersave.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/cpufreq_powersave.c
+++ linux-pm/drivers/cpufreq/cpufreq_powersave.c
@@ -21,6 +21,7 @@ static struct cpufreq_governor cpufreq_g
.name = "powersave",
.limits = cpufreq_gov_powersave_limits,
.owner = THIS_MODULE,
+ .flags = CPUFREQ_GOV_STRICT_TARGET,
};
MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
Index: linux-pm/include/linux/cpufreq.h
===================================================================
--- linux-pm.orig/include/linux/cpufreq.h
+++ linux-pm/include/linux/cpufreq.h
@@ -575,6 +575,9 @@ struct cpufreq_governor {
/* For governors which change frequency dynamically by themselves */
#define CPUFREQ_GOV_DYNAMIC_SWITCHING BIT(0)
+/* For governors wanting the target frequency to be set exactly */
+#define CPUFREQ_GOV_STRICT_TARGET BIT(1)
+
/* Pass a target to the cpufreq driver */
unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy,
next prev parent reply other threads:[~2020-11-10 17:28 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-09 16:49 [PATCH v2 0/4] cpufreq: intel_pstate: Handle powersave governor correctly in the passive mode with HWP Rafael J. Wysocki
2020-11-09 16:51 ` [PATCH v2 1/4] cpufreq: Introduce governor flags Rafael J. Wysocki
2020-11-10 2:41 ` Viresh Kumar
2020-11-10 12:36 ` Rafael J. Wysocki
2020-11-09 16:52 ` [PATCH v2 2/4] cpufreq: Introduce CPUFREQ_GOV_FLAG_STRICT_TARGET Rafael J. Wysocki
2020-11-10 2:41 ` Viresh Kumar
2020-11-09 16:53 ` [PATCH v2 3/4] cpufreq: Add strict_target to struct cpufreq_policy Rafael J. Wysocki
2020-11-10 2:47 ` Viresh Kumar
2020-11-10 12:37 ` Rafael J. Wysocki
2020-11-09 16:55 ` [PATCH v2 4/4] cpufreq: intel_pstate: Take CPUFREQ_GOV_FLAG_STRICT_TARGET into account Rafael J. Wysocki
2020-11-10 2:48 ` Viresh Kumar
2020-11-10 17:21 ` [PATCH v3 0/4] cpufreq: intel_pstate: Handle powersave governor correctly in the passive mode with HWP Rafael J. Wysocki
2020-11-10 17:25 ` [PATCH v3 1/4] cpufreq: Introduce governor flags Rafael J. Wysocki
2020-11-10 17:26 ` Rafael J. Wysocki [this message]
2020-11-10 17:26 ` [PATCH v3 3/4] cpufreq: Add strict_target to struct cpufreq_policy Rafael J. Wysocki
2020-11-10 17:27 ` [PATCH v3 4/4] cpufreq: intel_pstate: Take CPUFREQ_GOV_STRICT_TARGET into account Rafael J. Wysocki
2020-11-10 21:37 ` [PATCH v3 0/4] cpufreq: intel_pstate: Handle powersave governor correctly in the passive mode with HWP Doug Smythies
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