From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A49A8C2D0E7 for ; Thu, 26 Mar 2020 23:26:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7C602208FE for ; Thu, 26 Mar 2020 23:26:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585265217; bh=2SnIw+qa73YvKL5CuWhDtXX7O/rmDnHV2j0BMtChfm0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ymrgj39ZUQzktxoznXBUyiAAUj3j0o4TYn2lMQrww56bK+E7yEP3Aoy/y9G+hb8RL 3TtkKih2i/SbXlFAwIxmSpSv0ERV+hRUDoTO6Df4omQWs2lZpmtdi2Br94EXdOhI5n dEJqgWhU46U+X3zvXu0yeOTCJbAW0gRdcUi1d9lM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727600AbgCZXZJ (ORCPT ); Thu, 26 Mar 2020 19:25:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:45786 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726067AbgCZXZJ (ORCPT ); Thu, 26 Mar 2020 19:25:09 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B1031208FE; Thu, 26 Mar 2020 23:25:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585265108; bh=2SnIw+qa73YvKL5CuWhDtXX7O/rmDnHV2j0BMtChfm0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UIHILtaEFfu45B4VCv4vEOsk4r95gJZM1U15r24xgtdumnedSIFSQK0Q4it7fzTzL 20MhHY//1fxihAKiCaxO+SUDcSLT6CMjEnW2omLecl07WV+8NXJoISD2OIBXTLedsW 0FkpMA6wpSVxXLVyT8zO6NltFokMNb6PjsLLOpLQ= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Len Brown , Sasha Levin , linux-pm@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 11/15] tools/power turbostat: Fix missing SYS_LPI counter on some Chromebooks Date: Thu, 26 Mar 2020 19:24:51 -0400 Message-Id: <20200326232455.8029-11-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200326232455.8029-1-sashal@kernel.org> References: <20200326232455.8029-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Len Brown [ Upstream commit 1f81c5efc020314b2db30d77efe228b7e117750d ] Some Chromebook BIOS' do not export an ACPI LPIT, which is how Linux finds the residency counter for CPU and SYSTEM low power states, that is exports in /sys/devices/system/cpu/cpuidle/*residency_us When these sysfs attributes are missing, check the debugfs attrubte from the pmc_core driver, which accesses the same counter value. Signed-off-by: Len Brown Signed-off-by: Sasha Levin --- tools/power/x86/turbostat/turbostat.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index fb665fdc722a4..2233cf722c692 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -299,6 +299,10 @@ int *irqs_per_cpu; /* indexed by cpu_num */ void setup_all_buffers(void); +char *sys_lpi_file; +char *sys_lpi_file_sysfs = "/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us"; +char *sys_lpi_file_debugfs = "/sys/kernel/debug/pmc_core/slp_s0_residency_usec"; + int cpu_is_not_present(int cpu) { return !CPU_ISSET_S(cpu, cpu_present_setsize, cpu_present_set); @@ -2844,8 +2848,6 @@ int snapshot_gfx_mhz(void) * * record snapshot of * /sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us - * - * return 1 if config change requires a restart, else return 0 */ int snapshot_cpu_lpi_us(void) { @@ -2865,17 +2867,14 @@ int snapshot_cpu_lpi_us(void) /* * snapshot_sys_lpi() * - * record snapshot of - * /sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us - * - * return 1 if config change requires a restart, else return 0 + * record snapshot of sys_lpi_file */ int snapshot_sys_lpi_us(void) { FILE *fp; int retval; - fp = fopen_or_die("/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us", "r"); + fp = fopen_or_die(sys_lpi_file, "r"); retval = fscanf(fp, "%lld", &cpuidle_cur_sys_lpi_us); if (retval != 1) @@ -4743,10 +4742,16 @@ void process_cpuid() else BIC_NOT_PRESENT(BIC_CPU_LPI); - if (!access("/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us", R_OK)) + if (!access(sys_lpi_file_sysfs, R_OK)) { + sys_lpi_file = sys_lpi_file_sysfs; BIC_PRESENT(BIC_SYS_LPI); - else + } else if (!access(sys_lpi_file_debugfs, R_OK)) { + sys_lpi_file = sys_lpi_file_debugfs; + BIC_PRESENT(BIC_SYS_LPI); + } else { + sys_lpi_file_sysfs = NULL; BIC_NOT_PRESENT(BIC_SYS_LPI); + } if (!quiet) decode_misc_feature_control(); -- 2.20.1