From patchwork Wed Nov 8 09:07:37 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?SsO8cmdlbiBHcm/Dnw==?= X-Patchwork-Id: 10048041 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 91B4960247 for ; Wed, 8 Nov 2017 09:10:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 884FE29446 for ; Wed, 8 Nov 2017 09:10:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7D30F2A181; Wed, 8 Nov 2017 09:10:25 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2F42329446 for ; Wed, 8 Nov 2017 09:10:25 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eCML5-0007w0-KW; Wed, 08 Nov 2017 09:08:03 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eCML4-0007vS-ET for xen-devel@lists.xenproject.org; Wed, 08 Nov 2017 09:08:02 +0000 Received: from [193.109.254.147] by server-8.bemta-6.messagelabs.com id F8/05-13910-179C20A5; Wed, 08 Nov 2017 09:08:01 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrOLMWRWlGSWpSXmKPExsVyuP0Ov27hSaY og39X+Cy+b5nM5MDocfjDFZYAxijWzLyk/IoE1ox3mz+wFnRwVXw/V9nA+ICji5GTQ0LASOLt xH9MXYxcHEICCxkljnX3MoMk2ARUJTZcP8UKYosIZEgcXPmSFaSIWeAOo8Ty51sYQRLCAjYS3 07eYgexWYAaGu82gjXzCphI7L4ynQlig7xEx4HJLCA2p4CpxMr5q9lAbCGgmnn/rjJNYORewM iwilG9OLWoLLVI10IvqSgzPaMkNzEzR9fQwEwvN7W4ODE9NScxqVgvOT93EyPQuwxAsINx9mX /Q4ySHExKoryvypiihPiS8lMqMxKLM+KLSnNSiw8xynBwKEnwTjoBlBMsSk1PrUjLzAGGGUxa goNHSYRX/ihQmre4IDG3ODMdInWK0Zjj2czXDcwc0662NjELseTl56VKifNWgEwSACnNKM2DG wQL/0uMslLCvIxApwnxFKQW5WaWoMq/YhTnYFQS5mUBmcKTmVcCt+8V0ClMQKfsD2EAOaUkES El1cA4836U3oGSxw7qM/4c0tj4v1U46cd+0y9zX1/4Nvvs3ZLgefZdS06uVZuZyZPq1Zd2QUB tQ9LslSZPntdnGMtu+FTNZFF33UD55R+u2HvbE7alf+C9r7Lh9fd30Zel+HZu52ZmOHNvRvQP Lcs9ykF7q696+pbc3MK0KGUuG9PO75seHr9vd/TufCWW4oxEQy3mouJEAPeX2nV6AgAA X-Env-Sender: jgross@suse.com X-Msg-Ref: server-11.tower-27.messagelabs.com!1510132080!83700532!1 X-Originating-IP: [195.135.220.15] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 9.4.45; banners=-,-,- X-VirusChecked: Checked Received: (qmail 42505 invoked from network); 8 Nov 2017 09:08:01 -0000 Received: from mx2.suse.de (HELO mx2.suse.de) (195.135.220.15) by server-11.tower-27.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 8 Nov 2017 09:08:01 -0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 5F0FAAC07; Wed, 8 Nov 2017 09:08:00 +0000 (UTC) From: Juergen Gross To: linux-kernel@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org Date: Wed, 8 Nov 2017 10:07:37 +0100 Message-Id: <20171108090739.26491-2-jgross@suse.com> X-Mailer: git-send-email 2.12.3 In-Reply-To: <20171108090739.26491-1-jgross@suse.com> References: <20171108090739.26491-1-jgross@suse.com> Cc: Juergen Gross , len.brown@intel.com, rkrcmar@redhat.com, rjw@rjwysocki.net, mingo@redhat.com, pavel@ucw.cz, hpa@zytor.com, pbonzini@redhat.com, tglx@linutronix.de, boris.ostrovsky@oracle.com Subject: [Xen-devel] [PATCH 1/3] x86/acpi: add test for ACPI_FADT_NO_VGA X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add a test for ACPI_FADT_NO_VGA when scanning the FADT and set the new flag x86_platform.legacy.no_vga accordingly. Signed-off-by: Juergen Gross --- arch/x86/include/asm/x86_init.h | 1 + arch/x86/kernel/acpi/boot.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h index 8a1ebf9540dd..75a60fa52a8a 100644 --- a/arch/x86/include/asm/x86_init.h +++ b/arch/x86/include/asm/x86_init.h @@ -195,6 +195,7 @@ enum x86_legacy_i8042_state { struct x86_legacy_features { enum x86_legacy_i8042_state i8042; int rtc; + int no_vga; int reserve_bios_regions; struct x86_legacy_devices devices; }; diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 079535e53e2a..ef9e02e614d0 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -961,6 +961,11 @@ static int __init acpi_parse_fadt(struct acpi_table_header *table) x86_platform.legacy.rtc = 0; } + if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { + pr_debug("ACPI: probing for VGA not safe\n"); + x86_platform.legacy.no_vga = 1; + } + #ifdef CONFIG_X86_PM_TIMER /* detect the location of the ACPI PM Timer */ if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {