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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 4D91DC2BA83 for ; Thu, 13 Feb 2020 15:02:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2FE0224650 for ; Thu, 13 Feb 2020 15:02:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727763AbgBMPCB (ORCPT ); Thu, 13 Feb 2020 10:02:01 -0500 Received: from mga12.intel.com ([192.55.52.136]:60288 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726937AbgBMPB7 (ORCPT ); Thu, 13 Feb 2020 10:01:59 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Feb 2020 07:01:59 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,437,1574150400"; d="scan'208";a="313748477" Received: from nntpdsd52-183.inn.intel.com ([10.125.52.183]) by orsmga001.jf.intel.com with ESMTP; 13 Feb 2020 07:01:54 -0800 From: roman.sudarikov@linux.intel.com To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, linux-kernel@vger.kernel.org, eranian@google.com, bgregg@netflix.com, ak@linux.intel.com, kan.liang@linux.intel.com, gregkh@linuxfoundation.org Cc: alexander.antonov@intel.com, roman.sudarikov@linux.intel.com Subject: [PATCH v6 1/3] perf x86: Infrastructure for exposing an Uncore unit to PMON mapping Date: Thu, 13 Feb 2020 18:01:46 +0300 Message-Id: <20200213150148.5627-2-roman.sudarikov@linux.intel.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20200213150148.5627-1-roman.sudarikov@linux.intel.com> References: <20200213150148.5627-1-roman.sudarikov@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Roman Sudarikov Intel® Xeon® Scalable processor family (code name Skylake-SP) makes significant changes in the integrated I/O (IIO) architecture. The new solution introduces IIO stacks which are responsible for managing traffic between the PCIe domain and the Mesh domain. Each IIO stack has its own PMON block and can handle either DMI port, x16 PCIe root port, MCP-Link or various built-in accelerators. IIO PMON blocks allow concurrent monitoring of I/O flows up to 4 x4 bifurcation within each IIO stack. Software is supposed to program required perf counters within each IIO stack and gather performance data. The tricky thing here is that IIO PMON reports data per IIO stack but users have no idea what IIO stacks are - they only know devices which are connected to the platform. Understanding IIO stack concept to find which IIO stack that particular IO device is connected to, or to identify an IIO PMON block to program for monitoring specific IIO stack assumes a lot of implicit knowledge about given Intel server platform architecture. Usage example: ls /sys/devices/uncore__/die* Each Uncore unit type, by its nature, can be mapped to its own context, for example: 1. CHA - each uncore_cha_ is assigned to manage a distinct slice of LLC capacity; 2. UPI - each uncore_upi_ is assigned to manage one link of Intel UPI Subsystem; 3. IIO - each uncore_iio_ is assigned to manage one stack of the IIO module; 4. IMC - each uncore_imc_ is assigned to manage one channel of Memory Controller. Implementation details: Optional callback added to struct intel_uncore_type to discover and map Uncore units to PMONs: int (*set_mapping)(struct intel_uncore_type *type) Details of IIO Uncore unit mapping to IIO PMON: Each IIO stack is either DMI port, x16 PCIe root port, MCP-Link or various built-in accelerators. For Uncore IIO Unit type, the mapping file holds bus numbers of devices, which can be monitored by that IIO PMON block on each die. Co-developed-by: Alexander Antonov Signed-off-by: Alexander Antonov Signed-off-by: Roman Sudarikov --- arch/x86/events/intel/uncore.c | 5 +++++ arch/x86/events/intel/uncore.h | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c index 86467f85c383..98ab8539f126 100644 --- a/arch/x86/events/intel/uncore.c +++ b/arch/x86/events/intel/uncore.c @@ -843,10 +843,12 @@ static int uncore_pmu_register(struct intel_uncore_pmu *pmu) .read = uncore_pmu_event_read, .module = THIS_MODULE, .capabilities = PERF_PMU_CAP_NO_EXCLUDE, + .attr_update = pmu->type->attr_update, }; } else { pmu->pmu = *pmu->type->pmu; pmu->pmu.attr_groups = pmu->type->attr_groups; + pmu->pmu.attr_update = pmu->type->attr_update; } if (pmu->type->num_boxes == 1) { @@ -954,6 +956,9 @@ static int __init uncore_type_init(struct intel_uncore_type *type, bool setid) type->pmu_group = &uncore_pmu_attr_group; + if (type->set_mapping) + type->set_mapping(type); + return 0; err: diff --git a/arch/x86/events/intel/uncore.h b/arch/x86/events/intel/uncore.h index bbfdaa720b45..8821f35e32f0 100644 --- a/arch/x86/events/intel/uncore.h +++ b/arch/x86/events/intel/uncore.h @@ -72,7 +72,12 @@ struct intel_uncore_type { struct uncore_event_desc *event_descs; struct freerunning_counters *freerunning; const struct attribute_group *attr_groups[4]; + const struct attribute_group **attr_update; struct pmu *pmu; /* for custom pmu ops */ + /* PMON's topologies */ + u64 *topology; + /* mapping Uncore units to PMON ranges */ + int (*set_mapping)(struct intel_uncore_type *type); }; #define pmu_group attr_groups[0] -- 2.19.1