From patchwork Thu Aug 18 21:16:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Linton X-Patchwork-Id: 12947987 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 08105C32789 for ; Thu, 18 Aug 2022 21:24:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345934AbiHRVYs (ORCPT ); Thu, 18 Aug 2022 17:24:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60696 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347108AbiHRVYR (ORCPT ); Thu, 18 Aug 2022 17:24:17 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 6FBCDDEA45; Thu, 18 Aug 2022 14:16:59 -0700 (PDT) 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 3871316F8; Thu, 18 Aug 2022 14:16:32 -0700 (PDT) Received: from mammon-tx2.austin.arm.com (mammon-tx2.austin.arm.com [10.118.28.62]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 8B6C03F67D; Thu, 18 Aug 2022 14:16:30 -0700 (PDT) From: Jeremy Linton To: linux-acpi@vger.kernel.org Cc: rafael@kernel.or, lenb@kernel.org, viresh.kumar@linaro.org, robert.moore@intel.com, punit.agrawal@bytedance.com, lukasz.luba@arm.com, ionela.voinescu@arm.com, pierre.gondois@arm.com, linux-kernel@vger.kernel.org, devel@acpica.org, linux-pm@vger.kernel.org, Jeremy Linton Subject: [PATCH v3 2/2] cpufreq: CPPC: Change FIE default Date: Thu, 18 Aug 2022 16:16:19 -0500 Message-Id: <20220818211619.4193362-3-jeremy.linton@arm.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220818211619.4193362-1-jeremy.linton@arm.com> References: <20220818211619.4193362-1-jeremy.linton@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org FIE is mostly implemented as PCC mailboxes on arm machines. This was enabled by default without any data suggesting that it does anything but hurt system performance. Lets change the default to 'n' until hardware appears which clearly benefits. Signed-off-by: Jeremy Linton --- drivers/cpufreq/Kconfig.arm | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm index 954749afb5fe..ad66d8f15db0 100644 --- a/drivers/cpufreq/Kconfig.arm +++ b/drivers/cpufreq/Kconfig.arm @@ -22,7 +22,7 @@ config ACPI_CPPC_CPUFREQ config ACPI_CPPC_CPUFREQ_FIE bool "Frequency Invariance support for CPPC cpufreq driver" depends on ACPI_CPPC_CPUFREQ && GENERIC_ARCH_TOPOLOGY - default y + default n help This extends frequency invariance support in the CPPC cpufreq driver, by using CPPC delivered and reference performance counters.