From owner-freebsd-arm@FreeBSD.ORG Fri Mar 6 16:22:46 2015 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C7A71976 for ; Fri, 6 Mar 2015 16:22:46 +0000 (UTC) Received: from phabric-backend.isc.freebsd.org (phabric-backend.isc.freebsd.org [IPv6:2001:4f8:3:ffe0:406a:0:50:2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id A7B6DE86 for ; Fri, 6 Mar 2015 16:22:46 +0000 (UTC) Received: from phabric-backend.isc.freebsd.org (phabric-backend.isc.freebsd.org [127.0.1.5]) by phabric-backend.isc.freebsd.org (8.14.9/8.14.9) with ESMTP id t26GMk8T074896 for ; Fri, 6 Mar 2015 16:22:46 GMT (envelope-from root@phabric-backend.isc.freebsd.org) Received: (from root@localhost) by phabric-backend.isc.freebsd.org (8.14.9/8.14.9/Submit) id t26GMkgI074895; Fri, 6 Mar 2015 16:22:46 GMT (envelope-from root) Date: Fri, 6 Mar 2015 16:22:46 +0000 To: freebsd-arm@freebsd.org From: "zbb (Zbigniew Bodek)" Subject: [Differential] [Request, 1 lines] D2017: Allow to disable alignment faults in the kernel configuration file Message-ID: X-Priority: 3 Thread-Topic: D2017: Allow to disable alignment faults in the kernel configuration file X-Herald-Rules: none X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-Cc: Thread-Index: M2IwYjY0ZDAxMWY3ZTNlM2Y4OWM0M2JjYjUz X-Phabricator-Sent-This-Message: Yes X-Mail-Transport-Agent: MetaMTA X-Auto-Response-Suppress: All X-Phabricator-Mail-Tags: , , , MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="utf-8" X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Mar 2015 16:22:46 -0000 zbb created this revision. zbb added reviewers: imp, ian, andrew. zbb added a subscriber: freebsd-arm. REVISION SUMMARY This patch allows taking advantage of disabling alignment fault handling on ARM platforms. Although some CPU instructions are capable to operate on unaligned addresses they may still as a side effect report it. This option allows to avoid related performance overhead, but suppresses this notification. Submitted by: Wojciech Macek Obtained from: Semihalf REVISION DETAIL https://reviews.freebsd.org/D2017 AFFECTED FILES sys/conf/options.arm To: zbb, imp, ian, andrew Cc: freebsd-arm