From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751715AbdKHJIh (ORCPT ); Wed, 8 Nov 2017 04:08:37 -0500 Received: from mx2.suse.de ([195.135.220.15]:55410 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751081AbdKHJIC (ORCPT ); Wed, 8 Nov 2017 04:08:02 -0500 From: Juergen Gross To: linux-kernel@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, boris.ostrovsky@oracle.com, pbonzini@redhat.com, rkrcmar@redhat.com, rjw@rjwysocki.net, len.brown@intel.com, pavel@ucw.cz, Juergen Gross Subject: [PATCH 1/3] x86/acpi: add test for ACPI_FADT_NO_VGA 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> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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) { -- 2.12.3