From patchwork Fri Jan 23 00:44:41 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: al.stone@linaro.org X-Patchwork-Id: 5690301 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 89B23C058D for ; Fri, 23 Jan 2015 00:49:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E9FAF2026F for ; Fri, 23 Jan 2015 00:49:19 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id AB3FA2026D for ; Fri, 23 Jan 2015 00:49:18 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YESOi-0003aT-5d; Fri, 23 Jan 2015 00:46:52 +0000 Received: from mail-ie0-f178.google.com ([209.85.223.178]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YESNK-0001wt-0P for linux-arm-kernel@lists.infradead.org; Fri, 23 Jan 2015 00:45:29 +0000 Received: by mail-ie0-f178.google.com with SMTP id rp18so4603927iec.9 for ; Thu, 22 Jan 2015 16:45:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=eaJ7FZhZvu7rTaiiVjBBzHpeNjRrtQUt+wr5yJbgRmg=; b=la5x1eIpopuTttdPBoOws4nEEpcQKqiNI5+xtI5KEd9ZX7wvtlkBRfXOT0RiJmhpFW ZBp2NCdmByw1pxRIKBDP3UzbyKLH+Do/eH2e8Wj8EhHavwISL5RP2ZeF8/HPQgPpudWL qXvKIOXCkwpgJc9B+8OE6bjfhv2cgaCjm7oEh6NFq9EArDCw+3DU05U3R/X762xzZO8w RsBCtIhhvQhFCtrk4HsSzPC3aglBX/mFiwjghdqDOQNMWqwzNcOmWNFDF5sFNaYhg9Dr xpuxbxW7f6GKs5HuC36BPS8VJlRqYCkBVNoWaM116AVdiSYKoqRazeLQSmMFQ+mLoXn7 vU7A== X-Gm-Message-State: ALoCoQlaYqQpoDplY/+0csY0eJ7UqyKUidmQ0YDWgEeEXWQwTM/NKv4g3vO4oZjfAqxAbGuMSRWn X-Received: by 10.50.50.140 with SMTP id c12mr8288719igo.5.1421973904604; Thu, 22 Jan 2015 16:45:04 -0800 (PST) Received: from fidelio.ahs3.com (c-50-134-239-249.hsd1.co.comcast.net. [50.134.239.249]) by mx.google.com with ESMTPSA id k18sm4026037igt.5.2015.01.22.16.45.02 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 22 Jan 2015 16:45:03 -0800 (PST) From: al.stone@linaro.org To: tony.luck@intel.com, fenghua.yu@intel.com, rjw@rjwysocki.net, catalin.marinas@arm.com, will.deacon@arm.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, lenb@kernel.org, robert.moore@intel.com Subject: [PATCH 4/7] ia64: ACPI: create arch-dependent version of acpi_osi_handler() Date: Thu, 22 Jan 2015 17:44:41 -0700 Message-Id: <1421973884-13029-5-git-send-email-al.stone@linaro.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1421973884-13029-1-git-send-email-al.stone@linaro.org> References: <1421973884-13029-1-git-send-email-al.stone@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150122_164526_134673_CF7E7D4E X-CRM114-Status: GOOD ( 18.03 ) X-Spam-Score: -0.7 (/) Cc: linaro-kernel@lists.linaro.org, linux-ia64@vger.kernel.org, linaro-acpi@lists.linaro.org, patches@linaro.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devel@acpica.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Al Stone In order to deprecate the use of _OSI for arm64 or other new architectures, we need to make the default handler something we can change for various platforms. This patch moves the definition of acpi_osi_handler() -- the function used by ACPICA as a callback for evaluating _OSI -- into arch- dependent ACPI files. The declaration of acpi_os_handler() was moved in a previous patch. No functional change for ia64. Signed-off-by: Al Stone --- arch/ia64/kernel/acpi/Makefile | 2 +- arch/ia64/kernel/acpi/osi.c | 119 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 120 insertions(+), 1 deletion(-) create mode 100644 arch/ia64/kernel/acpi/osi.c diff --git a/arch/ia64/kernel/acpi/Makefile b/arch/ia64/kernel/acpi/Makefile index 8c12745..475b530 100644 --- a/arch/ia64/kernel/acpi/Makefile +++ b/arch/ia64/kernel/acpi/Makefile @@ -1 +1 @@ -obj-$(CONFIG_ACPI) += acpi.o acpi-ext.o +obj-$(CONFIG_ACPI) += acpi.o acpi-ext.o osi.o diff --git a/arch/ia64/kernel/acpi/osi.c b/arch/ia64/kernel/acpi/osi.c new file mode 100644 index 0000000..80dbc8a --- /dev/null +++ b/arch/ia64/kernel/acpi/osi.c @@ -0,0 +1,119 @@ +/* + * osi.c - _OSI implementation (moved from drivers/acpi/osl.c) + * + * Copyright (C) 2000 Andrew Henroid + * Copyright (C) 2001, 2002 Andy Grover + * Copyright (C) 2001, 2002 Paul Diefenbaugh + * Copyright (c) 2008 Intel Corporation + * Author: Matthew Wilcox + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "internal.h" + +#define _COMPONENT ACPI_OS_SERVICES +ACPI_MODULE_NAME("osl"); + +/* + * The story of _OSI(Linux) + * + * From pre-history through Linux-2.6.22, + * Linux responded TRUE upon a BIOS OSI(Linux) query. + * + * Unfortunately, reference BIOS writers got wind of this + * and put OSI(Linux) in their example code, quickly exposing + * this string as ill-conceived and opening the door to + * an un-bounded number of BIOS incompatibilities. + * + * For example, OSI(Linux) was used on resume to re-POST a + * video card on one system, because Linux at that time + * could not do a speedy restore in its native driver. + * But then upon gaining quick native restore capability, + * Linux has no way to tell the BIOS to skip the time-consuming + * POST -- putting Linux at a permanent performance disadvantage. + * On another system, the BIOS writer used OSI(Linux) + * to infer native OS support for IPMI! On other systems, + * OSI(Linux) simply got in the way of Linux claiming to + * be compatible with other operating systems, exposing + * BIOS issues such as skipped device initialization. + * + * So "Linux" turned out to be a really poor chose of + * OSI string, and from Linux-2.6.23 onward we respond FALSE. + * + * BIOS writers should NOT query _OSI(Linux) on future systems. + * Linux will complain on the console when it sees it, and return FALSE. + * To get Linux to return TRUE for your system will require + * a kernel source update to add a DMI entry, + * or boot with "acpi_osi=Linux" + */ + +static struct osi_linux { + unsigned int enable:1; + unsigned int dmi:1; + unsigned int cmdline:1; + unsigned int default_disabling:1; +} osi_linux = {0, 0, 0, 0}; + +u32 acpi_osi_handler(acpi_string interface, u32 supported) +{ + if (!strcmp("Linux", interface)) { + + printk_once(KERN_NOTICE FW_BUG PREFIX + "BIOS _OSI(Linux) query %s%s\n", + osi_linux.enable ? "honored" : "ignored", + osi_linux.cmdline ? " via cmdline" : + osi_linux.dmi ? " via DMI" : ""); + } + + if (!strcmp("Darwin", interface)) { + /* + * Apple firmware will behave poorly if it receives positive + * answers to "Darwin" and any other OS. Respond positively + * to Darwin and then disable all other vendor strings. + */ + acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); + supported = ACPI_UINT32_MAX; + } + + return supported; +} +