From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753906AbcGVK0y (ORCPT ); Fri, 22 Jul 2016 06:26:54 -0400 Received: from terminus.zytor.com ([198.137.202.10]:47938 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753842AbcGVK0w (ORCPT ); Fri, 22 Jul 2016 06:26:52 -0400 Date: Fri, 22 Jul 2016 03:25:36 -0700 From: tip-bot for Andy Lutomirski Message-ID: Cc: tglx@linutronix.de, toshi.kani@hp.com, jpoimboe@redhat.com, keescook@chromium.org, mingo@kernel.org, peterz@infradead.org, brgerst@gmail.com, torvalds@linux-foundation.org, akpm@linux-foundation.org, luto@kernel.org, bp@alien8.de, mario_limonciello@dell.com, dvlasenk@redhat.com, mcgrof@suse.com, linux-kernel@vger.kernel.org, hpa@zytor.com, mjg59@srcf.ucam.org Reply-To: luto@kernel.org, bp@alien8.de, akpm@linux-foundation.org, mario_limonciello@dell.com, mcgrof@suse.com, dvlasenk@redhat.com, mjg59@srcf.ucam.org, linux-kernel@vger.kernel.org, hpa@zytor.com, jpoimboe@redhat.com, tglx@linutronix.de, toshi.kani@hp.com, peterz@infradead.org, mingo@kernel.org, brgerst@gmail.com, torvalds@linux-foundation.org, keescook@chromium.org In-Reply-To: <55bd591115498440d461857a7b64f349a5d911f3.1469135598.git.luto@kernel.org> References: <55bd591115498440d461857a7b64f349a5d911f3.1469135598.git.luto@kernel.org> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/boot] x86/boot: Clarify what x86_legacy_features.reserve_bios_regions does Git-Commit-ID: 30f027398b329c75c8f23a3c13be240b50866fdc X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 30f027398b329c75c8f23a3c13be240b50866fdc Gitweb: http://git.kernel.org/tip/30f027398b329c75c8f23a3c13be240b50866fdc Author: Andy Lutomirski AuthorDate: Thu, 21 Jul 2016 14:16:51 -0700 Committer: Ingo Molnar CommitDate: Fri, 22 Jul 2016 11:46:01 +0200 x86/boot: Clarify what x86_legacy_features.reserve_bios_regions does It doesn't just control probing for the EBDA -- it controls whether we detect and reserve the <1MB BIOS regions in general. Signed-off-by: Andy Lutomirski Cc: Andrew Morton Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Josh Poimboeuf Cc: Kees Cook Cc: Linus Torvalds Cc: Luis R. Rodriguez Cc: Mario Limonciello Cc: Matthew Garrett Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Toshi Kani Link: http://lkml.kernel.org/r/55bd591115498440d461857a7b64f349a5d911f3.1469135598.git.luto@kernel.org Signed-off-by: Ingo Molnar --- arch/x86/include/asm/x86_init.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h index c519c05..66c15a0 100644 --- a/arch/x86/include/asm/x86_init.h +++ b/arch/x86/include/asm/x86_init.h @@ -168,8 +168,9 @@ struct x86_legacy_devices { * struct x86_legacy_features - legacy x86 features * * @rtc: this device has a CMOS real-time clock present - * @reserve_bios_regions: it's safe to search for the EBDA signature in the hardware's - * low RAM + * @reserve_bios_regions: boot code will search for the EBDA address and the + * start of the 640k - 1M BIOS region. If false, the platform must + * ensure that its memory map correctly reserves sub-1MB regions as needed. * @devices: legacy x86 devices, refer to struct x86_legacy_devices * documentation for further details. */