From patchwork Mon Oct 8 16:51:36 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: srinivas pandruvada X-Patchwork-Id: 10631051 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 05B85112B for ; Mon, 8 Oct 2018 16:55:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E8E412623D for ; Mon, 8 Oct 2018 16:55:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DCD132973B; Mon, 8 Oct 2018 16:55:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5202B28894 for ; Mon, 8 Oct 2018 16:55:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726439AbeJIAHy (ORCPT ); Mon, 8 Oct 2018 20:07:54 -0400 Received: from mga02.intel.com ([134.134.136.20]:2780 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726291AbeJIAHy (ORCPT ); Mon, 8 Oct 2018 20:07:54 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Oct 2018 09:55:16 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,357,1534834800"; d="scan'208";a="269512543" Received: from spandruv-desk.jf.intel.com ([10.54.75.31]) by fmsmga005.fm.intel.com with ESMTP; 08 Oct 2018 09:51:37 -0700 From: Srinivas Pandruvada To: rjw@rjwysocki.net, lenb@kernel.org, robert.moore@intel.com, erik.schmauss@intel.com Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, devel@acpica.org, linux-pm@vger.kernel.org, pprakash@codeaurora.org, george.cherian@cavium.com, Srinivas Pandruvada Subject: [RESEND][PATCH] ACPI / CPPC: Add support for guaranteed performance Date: Mon, 8 Oct 2018 09:51:36 -0700 Message-Id: <20181008165136.9288-1-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 2.17.1 Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The Continuous Performance Control Package can have guaranteed performance field. Add support to read guaranteed performance. Signed-off-by: Srinivas Pandruvada --- No changes. But adding CC to mailing lists. Documentation/acpi/cppc_sysfs.txt | 2 ++ drivers/acpi/cppc_acpi.c | 10 ++++++++-- include/acpi/cppc_acpi.h | 1 + 3 files changed, 11 insertions(+), 2 deletions(-) diff --git a/Documentation/acpi/cppc_sysfs.txt b/Documentation/acpi/cppc_sysfs.txt index f20fb445135d..812574d30717 100644 --- a/Documentation/acpi/cppc_sysfs.txt +++ b/Documentation/acpi/cppc_sysfs.txt @@ -22,6 +22,7 @@ $ ls -lR /sys/devices/system/cpu/cpu0/acpi_cppc/ /sys/devices/system/cpu/cpu0/acpi_cppc/: total 0 -r--r--r-- 1 root root 65536 Mar 5 19:38 feedback_ctrs +-r--r--r-- 1 root root 65536 Mar 5 19:38 guaranteed_perf -r--r--r-- 1 root root 65536 Mar 5 19:38 highest_perf -r--r--r-- 1 root root 65536 Mar 5 19:38 lowest_freq -r--r--r-- 1 root root 65536 Mar 5 19:38 lowest_nonlinear_perf @@ -33,6 +34,7 @@ total 0 -------------------------------------------------------------------------------- +* guaranteed_perf : Guaranteed performance of this processor (abstract scale). * highest_perf : Highest performance of this processor (abstract scale). * nominal_perf : Highest sustained performance of this processor (abstract scale). * lowest_nonlinear_perf : Lowest performance of this processor with nonlinear diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index d9ce4b162e2c..5babb9402f11 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -153,6 +153,7 @@ __ATTR(_name, 0444, show_##_name, NULL) } \ define_one_cppc_ro(member_name) +show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, guaranteed_perf); show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, highest_perf); show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, lowest_perf); show_cppc_data(cppc_get_perf_caps, cppc_perf_caps, nominal_perf); @@ -189,6 +190,7 @@ static struct attribute *cppc_attrs[] = { &nominal_perf.attr, &nominal_freq.attr, &lowest_freq.attr, + &guaranteed_perf.attr, NULL }; @@ -1061,9 +1063,9 @@ int cppc_get_perf_caps(int cpunum, struct cppc_perf_caps *perf_caps) { struct cpc_desc *cpc_desc = per_cpu(cpc_desc_ptr, cpunum); struct cpc_register_resource *highest_reg, *lowest_reg, - *lowest_non_linear_reg, *nominal_reg, + *lowest_non_linear_reg, *nominal_reg, *guaranteed_reg, *low_freq_reg = NULL, *nom_freq_reg = NULL; - u64 high, low, nom, min_nonlinear, low_f = 0, nom_f = 0; + u64 high, low, guaranteed, nom, min_nonlinear, low_f = 0, nom_f = 0; int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpunum); struct cppc_pcc_data *pcc_ss_data = NULL; int ret = 0, regs_in_pcc = 0; @@ -1079,6 +1081,7 @@ int cppc_get_perf_caps(int cpunum, struct cppc_perf_caps *perf_caps) nominal_reg = &cpc_desc->cpc_regs[NOMINAL_PERF]; low_freq_reg = &cpc_desc->cpc_regs[LOWEST_FREQ]; nom_freq_reg = &cpc_desc->cpc_regs[NOMINAL_FREQ]; + guaranteed_reg = &cpc_desc->cpc_regs[GUARANTEED_PERF]; /* Are any of the regs PCC ?*/ if (CPC_IN_PCC(highest_reg) || CPC_IN_PCC(lowest_reg) || @@ -1107,6 +1110,9 @@ int cppc_get_perf_caps(int cpunum, struct cppc_perf_caps *perf_caps) cpc_read(cpunum, nominal_reg, &nom); perf_caps->nominal_perf = nom; + cpc_read(cpunum, guaranteed_reg, &guaranteed); + perf_caps->guaranteed_perf = guaranteed; + cpc_read(cpunum, lowest_non_linear_reg, &min_nonlinear); perf_caps->lowest_nonlinear_perf = min_nonlinear; diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h index 8e0b8250a139..cf59e6210d27 100644 --- a/include/acpi/cppc_acpi.h +++ b/include/acpi/cppc_acpi.h @@ -104,6 +104,7 @@ enum cppc_regs { * today. */ struct cppc_perf_caps { + u32 guaranteed_perf; u32 highest_perf; u32 nominal_perf; u32 lowest_perf;