From patchwork Wed Jun 26 21:37:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Linton X-Patchwork-Id: 167861 Delivered-To: patch@linaro.org Received: by 2002:a92:4782:0:0:0:0:0 with SMTP id e2csp1463550ilk; Wed, 26 Jun 2019 14:37:32 -0700 (PDT) X-Google-Smtp-Source: APXvYqyfJb5YDcZ7yp4peuHHqvDOXV4DqtDcwY7wYDYagXd1jkZ8/Z3VxI5EbBLJo+9v94dCnJff X-Received: by 2002:a65:4c4a:: with SMTP id l10mr95625pgr.231.1561585052264; Wed, 26 Jun 2019 14:37:32 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1561585052; cv=none; d=google.com; s=arc-20160816; b=QMqJh34jzi2oFJo103JUm6VXTo8k2IWLMzjzGL83Siw1ixAOlZHh9qVkfWVCN+F7/I wFRGbD1EYt0yL2xvjHrWsvadsFF9Jrnjuh+yn+5NXmvAJnwY2IoAQoj0LJNxR1yhkjv9 ozbuXKwfc4IBWrFnUEAljvfLjYmMmcVRRYf7mGn1vGPManKi9uCE2EooQqkjJgIfQWcS ifMP9VV0FqqWAzeqwlPKc6PiBh8yAARYpDZ0tBsLuf0ywel9M58BUlLbSh41+ot3oZCj N+2zcRSAczuYiLbOxiad7fh5BIcD0DtI7QZ8zJnNFrv2BEvAF3rhZ1gz2TX4W4dDliY5 a9+Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from; bh=qeYnH1FfbZxmOiqVo9WwuwWMO9JilwL/iNe9lsmXTqY=; b=G+FNRtFCbSQuUM1z6IABushhCc5BU2ohl73NXrfOiSL+Ha1XJmdY8PivyYaHL+h+y4 fkxx0MVlpAOotLgJVg312v8kuEyhCsG9PkGv39DyoTLsHSjsFR72wDb6OZMxtKSNxD/T cagr6OWH1KVqjfW05ZX82ljaEr107eFzTq168ptyuaK9hZUT6bbkNMrqp8m+AsF/fU6a dLfUjzhIEYAT+K8d/2UufSknmKnd/AVsog2Vh8LIceFR2K4RE8JB5b1MJisRLyZPrvsG 6sCMHxzAQCsCRAuy1syXQRVMbBwJekB5PZCZr1rlVJdTw8FJ/Fdyx/uOlItwJTacqQz2 RMow== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-acpi-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id g11si265977plo.433.2019.06.26.14.37.31; Wed, 26 Jun 2019 14:37:32 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-acpi-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-acpi-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726239AbfFZVhb (ORCPT + 8 others); Wed, 26 Jun 2019 17:37:31 -0400 Received: from foss.arm.com ([217.140.110.172]:41418 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726223AbfFZVhb (ORCPT ); Wed, 26 Jun 2019 17:37:31 -0400 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 4F6E12B; Wed, 26 Jun 2019 14:37:30 -0700 (PDT) Received: from mammon-tx2.austin.arm.com (mammon-tx2.austin.arm.com [10.118.30.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 33EF13F246; Wed, 26 Jun 2019 14:37:30 -0700 (PDT) From: Jeremy Linton To: linux-arm-kernel@lists.infradead.org Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, rjw@rjwysocki.net, lenb@kernel.org, mark.rutland@arm.com, lorenzo.pieralisi@arm.com, sudeep.holla@arm.com, Jeremy Linton Subject: [PATCH v5 0/4] arm64: SPE ACPI enablement Date: Wed, 26 Jun 2019 16:37:14 -0500 Message-Id: <20190626213718.39423-1-jeremy.linton@arm.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org This patch series enables the Arm Statistical Profiling Extension (SPE) on ACPI platforms. This is possible because ACPI 6.3 uses a previously reserved field in the MADT to store the SPE interrupt number, similarly to how the normal PMU is described. If a consistent valid interrupt exists across all the cores in the system, a platform device is registered. That then triggers the SPE module, which runs as normal. We also add the ability to parse the PPTT for IDENTICAL cores. We then use this to sanity check the single SPE device we create. This creates a bit of a problem with respect to the specification though. The specification says that its legal for multiple tree's to exist in the PPTT. We handle this fine, but what happens in the case of multiple tree's is that the lack of a common node with IDENTICAL set forces us to assume that there are multiple non-IDENTICAL cores in the machine. v4->v5: Remove error returns from arm_spe_acpi_register_device() Add some review/test tags v3->v4: Rebase to 5.2. Minor formatting, patch rearrangement. Add missing `inline` in static header definition. Drop ARM_SPE_ACPI and just use ARM_SPE_PMU. v2->v3: Previously a function pointer was being used to handle the more complex node checking required by the IDENTICAL flag. This version simply checks for the IDENTICAL flag and calls flag_identical() to preform the revision and next node checks. (I think after reading Raphael's comments for the Nth time, this is actually what he was suggesting, which I initially miss interpreted). Modify subject of first patch so that its clear a that its a capitalization change rather, than a logical C 'case' change. v1->v2: Wrap the code which creates the SPE device in a new CONFIG_ARM_SPE_ACPI ifdef. Move arm,spe-v1 device name into common header file Some comment/case sensitivity/function name changes. Jeremy Linton (4): ACPI/PPTT: Modify node flag detection to find last IDENTICAL ACPI/PPTT: Add function to return ACPI 6.3 Identical tokens arm_pmu: acpi: spe: Add initial MADT/SPE probing perf: arm_spe: Enable ACPI/Platform automatic module loading arch/arm64/include/asm/acpi.h | 3 ++ drivers/acpi/pptt.c | 61 ++++++++++++++++++++++++++--- drivers/perf/arm_pmu_acpi.c | 72 +++++++++++++++++++++++++++++++++++ drivers/perf/arm_spe_pmu.c | 12 +++++- include/linux/acpi.h | 5 +++ include/linux/perf/arm_pmu.h | 2 + 6 files changed, 147 insertions(+), 8 deletions(-) -- 2.21.0 Acked-by: Rafael J. Wysocki