From patchwork Wed Mar 2 18:09:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ionela Voinescu X-Patchwork-Id: 12766523 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D8D6C433EF for ; Wed, 2 Mar 2022 18:10:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244029AbiCBSKq (ORCPT ); Wed, 2 Mar 2022 13:10:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58488 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244429AbiCBSKq (ORCPT ); Wed, 2 Mar 2022 13:10:46 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 1699775232; Wed, 2 Mar 2022 10:10:01 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A2923139F; Wed, 2 Mar 2022 10:10:01 -0800 (PST) Received: from e108754-lin.cambridge.arm.com (unknown [10.1.195.34]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C9CF43F73D; Wed, 2 Mar 2022 10:09:59 -0800 (PST) From: Ionela Voinescu To: Sudeep Holla , "Rafael J . Wysocki" , Thomas Gleixner , Ingo Molnar , Giovanni Gherdovich , Catalin Marinas , Will Deacon , Valentin Schneider , Dietmar Eggemann , Sean Kelley Cc: Pierre Gondois , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 1/3] x86, ACPI: rename init_freq_invariance_cppc to arch_init_invariance_cppc Date: Wed, 2 Mar 2022 18:09:11 +0000 Message-Id: <20220302180913.13229-2-ionela.voinescu@arm.com> X-Mailer: git-send-email 2.29.2.dirty In-Reply-To: <20220302180913.13229-1-ionela.voinescu@arm.com> References: <20220302180913.13229-1-ionela.voinescu@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org init_freq_invariance_cppc() was called in acpi_cppc_processor_probe(), after CPU performance information and controls were populated from the per-cpu _CPC objects. But these _CPC objects provide information that helps with both CPU (u-arch) and frequency invariance. Therefore, change the function name to a more generic one, while adding the arch_ prefix, as this function is expected to be defined differently by different architectures. Signed-off-by: Ionela Voinescu Tested-by: Valentin Schneider Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Giovanni Gherdovich Cc: "Rafael J. Wysocki" Acked-by: Rafael J. Wysocki --- arch/x86/include/asm/topology.h | 2 +- drivers/acpi/cppc_acpi.c | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h index 2f0b6be8eaab..5ec70f186775 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -223,7 +223,7 @@ static inline void arch_set_max_freq_ratio(bool turbo_disabled) #if defined(CONFIG_ACPI_CPPC_LIB) && defined(CONFIG_SMP) void init_freq_invariance_cppc(void); -#define init_freq_invariance_cppc init_freq_invariance_cppc +#define arch_init_invariance_cppc init_freq_invariance_cppc #endif #endif /* _ASM_X86_TOPOLOGY_H */ diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 866560cbb082..bfd142ab4e07 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -633,8 +633,8 @@ static bool is_cppc_supported(int revision, int num_ent) * ) */ -#ifndef init_freq_invariance_cppc -static inline void init_freq_invariance_cppc(void) { } +#ifndef arch_init_invariance_cppc +static inline void arch_init_invariance_cppc(void) { } #endif /** @@ -816,7 +816,7 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr) goto out_free; } - init_freq_invariance_cppc(); + arch_init_invariance_cppc(); kfree(output.pointer); return 0; From patchwork Wed Mar 2 18:09:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ionela Voinescu X-Patchwork-Id: 12766524 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8795DC433F5 for ; Wed, 2 Mar 2022 18:10:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244446AbiCBSKz (ORCPT ); Wed, 2 Mar 2022 13:10:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59052 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244437AbiCBSKy (ORCPT ); Wed, 2 Mar 2022 13:10:54 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 17FF67E58E; Wed, 2 Mar 2022 10:10:07 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D2B821424; Wed, 2 Mar 2022 10:10:06 -0800 (PST) Received: from e108754-lin.cambridge.arm.com (unknown [10.1.195.34]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 0EB7E3F73D; Wed, 2 Mar 2022 10:10:04 -0800 (PST) From: Ionela Voinescu To: Sudeep Holla , "Rafael J . Wysocki" , Thomas Gleixner , Ingo Molnar , Giovanni Gherdovich , Catalin Marinas , Will Deacon , Valentin Schneider , Dietmar Eggemann , Sean Kelley Cc: Pierre Gondois , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 2/3] arch_topology: obtain cpu capacity using information from CPPC Date: Wed, 2 Mar 2022 18:09:12 +0000 Message-Id: <20220302180913.13229-3-ionela.voinescu@arm.com> X-Mailer: git-send-email 2.29.2.dirty In-Reply-To: <20220302180913.13229-1-ionela.voinescu@arm.com> References: <20220302180913.13229-1-ionela.voinescu@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Define topology_init_cpu_capacity_cppc() to use highest performance values from _CPC objects to obtain and set maximum capacity information for each CPU. acpi_cppc_processor_probe() is a good point at which to trigger the initialization of CPU (u-arch) capacity values, as at this point the highest performance values can be obtained from each CPU's _CPC objects. Architectures can therefore use this functionality through arch_init_invariance_cppc(). The performance scale used by CPPC is a unified scale for all CPUs in the system. Therefore, by obtaining the raw highest performance values from the _CPC objects, and normalizing them on the [0, 1024] capacity scale, used by the task scheduler, we obtain the CPU capacity of each CPU. While an ACPI Notify(0x85) could alert about a change in the highest performance value, which should in turn retrigger the CPU capacity computations, this notification is not currently handled by the ACPI processor driver. When supported, a call to arch_init_invariance_cppc() would perform the update. Signed-off-by: Ionela Voinescu Tested-by: Valentin Schneider Cc: Sudeep Holla Acked-by: Sudeep Holla Tested-by: Yicong Yang --- drivers/base/arch_topology.c | 40 +++++++++++++++++++++++++++++++++++ include/linux/arch_topology.h | 4 ++++ 2 files changed, 44 insertions(+) diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c index 976154140f0b..ad2d95920ad1 100644 --- a/drivers/base/arch_topology.c +++ b/drivers/base/arch_topology.c @@ -339,6 +339,46 @@ bool __init topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu) return !ret; } +#ifdef CONFIG_ACPI_CPPC_LIB +#include + +void topology_init_cpu_capacity_cppc(void) +{ + struct cppc_perf_caps perf_caps; + int cpu; + + if (likely(acpi_disabled || !acpi_cpc_valid())) + return; + + raw_capacity = kcalloc(num_possible_cpus(), sizeof(*raw_capacity), + GFP_KERNEL); + if (!raw_capacity) + return; + + for_each_possible_cpu(cpu) { + if (!cppc_get_perf_caps(cpu, &perf_caps) && + (perf_caps.highest_perf >= perf_caps.nominal_perf) && + (perf_caps.highest_perf >= perf_caps.lowest_perf)) { + raw_capacity[cpu] = perf_caps.highest_perf; + pr_debug("cpu_capacity: CPU%d cpu_capacity=%u (raw).\n", + cpu, raw_capacity[cpu]); + continue; + } + + pr_err("cpu_capacity: CPU%d missing/invalid highest performance.\n", cpu); + pr_err("cpu_capacity: partial information: fallback to 1024 for all CPUs\n"); + goto exit; + } + + topology_normalize_cpu_scale(); + schedule_work(&update_topology_flags_work); + pr_debug("cpu_capacity: cpu_capacity initialization done\n"); + +exit: + free_raw_capacity(); +} +#endif + #ifdef CONFIG_CPU_FREQ static cpumask_var_t cpus_to_visit; static void parsing_done_workfn(struct work_struct *work); diff --git a/include/linux/arch_topology.h b/include/linux/arch_topology.h index cce6136b300a..58cbe18d825c 100644 --- a/include/linux/arch_topology.h +++ b/include/linux/arch_topology.h @@ -11,6 +11,10 @@ void topology_normalize_cpu_scale(void); int topology_update_cpu_topology(void); +#ifdef CONFIG_ACPI_CPPC_LIB +void topology_init_cpu_capacity_cppc(void); +#endif + struct device_node; bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu); From patchwork Wed Mar 2 18:09:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ionela Voinescu X-Patchwork-Id: 12766525 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 77315C433EF for ; Wed, 2 Mar 2022 18:10:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244436AbiCBSKz (ORCPT ); Wed, 2 Mar 2022 13:10:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59052 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244444AbiCBSKy (ORCPT ); Wed, 2 Mar 2022 13:10:54 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 6F8EB90CDC; Wed, 2 Mar 2022 10:10:10 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 3F6AE139F; Wed, 2 Mar 2022 10:10:10 -0800 (PST) Received: from e108754-lin.cambridge.arm.com (unknown [10.1.195.34]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 6990B3F73D; Wed, 2 Mar 2022 10:10:08 -0800 (PST) From: Ionela Voinescu To: Sudeep Holla , "Rafael J . Wysocki" , Thomas Gleixner , Ingo Molnar , Giovanni Gherdovich , Catalin Marinas , Will Deacon , Valentin Schneider , Dietmar Eggemann , Sean Kelley Cc: Pierre Gondois , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 3/3] arm64, topology: enable use of init_cpu_capacity_cppc() Date: Wed, 2 Mar 2022 18:09:13 +0000 Message-Id: <20220302180913.13229-4-ionela.voinescu@arm.com> X-Mailer: git-send-email 2.29.2.dirty In-Reply-To: <20220302180913.13229-1-ionela.voinescu@arm.com> References: <20220302180913.13229-1-ionela.voinescu@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Now that the arch topology driver provides a method of setting CPU capacity values based on information on highest performance from CPPC, use this functionality on arm64 platforms. Signed-off-by: Ionela Voinescu Acked-by: Catalin Marinas Tested-by: Valentin Schneider Cc: Catalin Marinas Cc: Will Deacon --- arch/arm64/include/asm/topology.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/include/asm/topology.h b/arch/arm64/include/asm/topology.h index f386b90a79c8..9fab663dd2de 100644 --- a/arch/arm64/include/asm/topology.h +++ b/arch/arm64/include/asm/topology.h @@ -24,6 +24,10 @@ void update_freq_counters_refs(void); #define arch_scale_freq_capacity topology_get_freq_scale #define arch_scale_freq_invariant topology_scale_freq_invariant +#ifdef CONFIG_ACPI_CPPC_LIB +#define arch_init_invariance_cppc topology_init_cpu_capacity_cppc +#endif + /* Replace task scheduler's default cpu-invariant accounting */ #define arch_scale_cpu_capacity topology_get_cpu_scale