From patchwork Sat Nov 4 10:59:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Guittot X-Patchwork-Id: 13445451 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C3F43C150 for ; Sat, 4 Nov 2023 10:59:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="OLJZ/NAf" Received: from mail-lj1-x236.google.com (mail-lj1-x236.google.com [IPv6:2a00:1450:4864:20::236]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00F80D4C for ; Sat, 4 Nov 2023 03:59:16 -0700 (PDT) Received: by mail-lj1-x236.google.com with SMTP id 38308e7fff4ca-2c5087d19a6so38943631fa.0 for ; Sat, 04 Nov 2023 03:59:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1699095555; x=1699700355; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=TkZaHixUrwPrJIZcMAT2UI1CVMoJazwhG5L/qYNHDpM=; b=OLJZ/NAf4ZEf45K0m9be9tlxklipxKiEah3Lfiw9MRb55oJkvQevIb88wp9EAb2egV ZlzaMnhwvzTIl/PpPCD9eNcJAv6QEb0PimPNwsV7wGNPZ+zGz6HqUj5ZaIJdcRDe4U2n n33vMenx3zLynMJvznF38JJXbmc90bRyw4vYBufEza0/Wafj5aMcmYn83AVXJ3QsaUgL D4AUVBUS39tmQZd8mHslkvW5yZNqbsEx2svupRPqvgeMbkJsMI84dp5rAtyr8FkxZDWd mNwb63WHrjHrSpKHSPEWQ4fm07zIGKGIn2XJvmucFkIO7AKhLIyLbYwY24f8af0Bh8RO wQKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1699095555; x=1699700355; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=TkZaHixUrwPrJIZcMAT2UI1CVMoJazwhG5L/qYNHDpM=; b=DC7VcOOvr6sMqXEFevm71J6MtG3YNaDD8uPeDg1L43vQisQpy4PyxzYdX9Z6M9N2sK C8ROr3am/rZOH0xxlHJhIbozQIxciGIhZHTmQv/niPM+huXl/rOPqhfx/igqU5IEHDpp gYEhy61512lkf4rfLY9Ugsf9+Qi8LhWLRhi8tgCEjHmPKCpcemQuUFvH17Uhe3Eozs8j oO4Ske6/3+DxO3KeqTdLzF8F9s0AZhNMQFLca8QKGBq090YIi+qPd8ullYURpu8SxWcH /SpVb0JBMli3V8gXGr2o23Z2F7TzxgDaIZvobcJ5VvGAzHqoPjdkgFNNLkHENiAKNyiI ljMg== X-Gm-Message-State: AOJu0YwD41YlxlyC0ByarpRD0SzRgNqklBqhVWk3I5QWw4+i9jqUw/yp sA0xxnEp+9g/abXRB+Gd6keacQ== X-Google-Smtp-Source: AGHT+IGatMiVkHBmtEgXSS+pWzzTWU/5QphnZgu+ruqZQUWWzvRdCWO28Yzol+5QNvFneAB53ahKPA== X-Received: by 2002:a2e:7a17:0:b0:2c2:a337:5ea with SMTP id v23-20020a2e7a17000000b002c2a33705eamr19234202ljc.27.1699095555017; Sat, 04 Nov 2023 03:59:15 -0700 (PDT) Received: from vingu-book.. ([2a01:e0a:f:6020:3172:eb13:5bac:126a]) by smtp.gmail.com with ESMTPSA id p6-20020a05600c358600b004053a6b8c41sm5315809wmq.12.2023.11.04.03.59.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 04 Nov 2023 03:59:14 -0700 (PDT) From: Vincent Guittot To: linux@armlinux.org.uk, catalin.marinas@arm.com, will@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, sudeep.holla@arm.com, gregkh@linuxfoundation.org, rafael@kernel.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, viresh.kumar@linaro.org, lenb@kernel.org, robert.moore@intel.com, lukasz.luba@arm.com, ionela.voinescu@arm.com, pierre.gondois@arm.com, beata.michalska@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org Cc: conor.dooley@microchip.com, suagrfillet@gmail.com, ajones@ventanamicro.com, lftan@kernel.org, Vincent Guittot Subject: [PATCH v5 2/7] cpufreq: Use the fixed and coherent frequency for scaling capacity Date: Sat, 4 Nov 2023 11:59:02 +0100 Message-Id: <20231104105907.1365392-3-vincent.guittot@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231104105907.1365392-1-vincent.guittot@linaro.org> References: <20231104105907.1365392-1-vincent.guittot@linaro.org> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 cpuinfo.max_freq can change at runtime because of boost as an example. This implies that the value could be different from the frequency that has been used to compute the capacity of a CPU. The new arch_scale_freq_ref() returns a fixed and coherent frequency that can be used to compute the capacity for a given frequency. Signed-off-by: Vincent Guittot Acked-by: Viresh Kumar Reviewed-by: Lukasz Luba Tested-by: Lukasz Luba Acked-by: Rafael J. Wysocki --- drivers/cpufreq/cpufreq.c | 4 ++-- include/linux/cpufreq.h | 1 + 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 60ed89000e82..8c4f9c2f9c44 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -454,7 +454,7 @@ void cpufreq_freq_transition_end(struct cpufreq_policy *policy, arch_set_freq_scale(policy->related_cpus, policy->cur, - policy->cpuinfo.max_freq); + arch_scale_freq_ref(policy->cpu)); spin_lock(&policy->transition_lock); policy->transition_ongoing = false; @@ -2174,7 +2174,7 @@ unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy, policy->cur = freq; arch_set_freq_scale(policy->related_cpus, freq, - policy->cpuinfo.max_freq); + arch_scale_freq_ref(policy->cpu)); cpufreq_stats_record_transition(policy, freq); if (trace_cpu_frequency_enabled()) { diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 71d186d6933a..738dcddf3cfe 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -1211,6 +1211,7 @@ void arch_set_freq_scale(const struct cpumask *cpus, { } #endif + /* the following are really really optional */ extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs;