From patchwork Wed Feb 17 11:54:19 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 62098 Delivered-To: patch@linaro.org Received: by 10.112.43.199 with SMTP id y7csp2234414lbl; Wed, 17 Feb 2016 03:55:18 -0800 (PST) X-Received: by 10.98.89.139 with SMTP id k11mr1507374pfj.56.1455710118534; Wed, 17 Feb 2016 03:55:18 -0800 (PST) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id d3si1539876pas.116.2016.02.17.03.55.18; Wed, 17 Feb 2016 03:55:18 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-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-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934245AbcBQLzN (ORCPT + 30 others); Wed, 17 Feb 2016 06:55:13 -0500 Received: from foss.arm.com ([217.140.101.70]:60093 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751582AbcBQLzG (ORCPT ); Wed, 17 Feb 2016 06:55:06 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 40BD63A1; Wed, 17 Feb 2016 03:54:16 -0800 (PST) Received: from e103737-lin.cambridge.arm.com (e103737-lin.cambridge.arm.com [10.1.207.150]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 661E13F213; Wed, 17 Feb 2016 03:55:04 -0800 (PST) From: Sudeep Holla To: "Rafael J. Wysocki" , linux-acpi@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, x86@kernel.org, Al Stone , Lorenzo Pieralisi , Mahesh Sivasubramanian , Ashwin Chaugule , Prashanth Prakash , Sudeep Holla Subject: [UPDATE] [PATCH v3 1/5] ACPI / processor : add support for ACPI0010 processor container Date: Wed, 17 Feb 2016 11:54:19 +0000 Message-Id: <1455710059-14380-1-git-send-email-sudeep.holla@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1449065446-26115-2-git-send-email-sudeep.holla@arm.com> References: <1449065446-26115-2-git-send-email-sudeep.holla@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ACPI 6.0 adds support for optional processor container device which may contain child objects that are either processor devices or other processor containers. This allows representing hierarchical processor topologies. It is declared using the _HID of ACPI0010. It is an abstract container used to represent CPU topology and should not be used to hotplug purposes. If no matching handler is found for a device in acpi_scan_attach_handler, acpi_bus_attach does a default enumeration for those devices with valid HID in the acpi namespace. This patch adds a scan handler for these ACPI processor containers to avoid default that enumeration and ensures the platform devices are not created for them. Cc: "Rafael J. Wysocki" Signed-off-by: Sudeep Holla --- drivers/acpi/acpi_processor.c | 17 +++++++++++++++++ include/acpi/processor.h | 1 + 2 files changed, 18 insertions(+) Update: - No change in the patch, just updated commit log -- 1.9.1 diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index 6979186dbd4b..b5e54f2da53d 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -514,7 +514,24 @@ static struct acpi_scan_handler processor_handler = { }, }; +static int acpi_processor_container_attach(struct acpi_device *dev, + const struct acpi_device_id *id) +{ + return 1; +} + +static const struct acpi_device_id processor_container_ids[] = { + { ACPI_PROCESSOR_CONTAINER_HID, }, + { } +}; + +static struct acpi_scan_handler processor_container_handler = { + .ids = processor_container_ids, + .attach = acpi_processor_container_attach, +}; + void __init acpi_processor_init(void) { acpi_scan_add_handler_with_hotplug(&processor_handler, "processor"); + acpi_scan_add_handler(&processor_container_handler); } diff --git a/include/acpi/processor.h b/include/acpi/processor.h index 07fb100bcc68..54d7860cac11 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -9,6 +9,7 @@ #define ACPI_PROCESSOR_CLASS "processor" #define ACPI_PROCESSOR_DEVICE_NAME "Processor" #define ACPI_PROCESSOR_DEVICE_HID "ACPI0007" +#define ACPI_PROCESSOR_CONTAINER_HID "ACPI0010" #define ACPI_PROCESSOR_BUSY_METRIC 10