From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Sun, 09 Aug 2015 00:11:11 +0200 (CEST) Received: from mail.linuxfoundation.org ([140.211.169.12]:41317 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S27011739AbbHHWKiTRMvf (ORCPT ); Sun, 9 Aug 2015 00:10:38 +0200 Received: from localhost (c-50-170-35-168.hsd1.wa.comcast.net [50.170.35.168]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 6027D273; Sat, 8 Aug 2015 22:10:32 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Paul Burton , Markos Chandras , linux-mips@linux-mips.org, Matthew Fortune , Ralf Baechle Subject: [PATCH 4.1 014/123] MIPS: Require O32 FP64 support for MIPS64 with O32 compat Date: Sat, 8 Aug 2015 15:08:12 -0700 Message-Id: <20150808220718.346788976@linuxfoundation.org> X-Mailer: git-send-email 2.5.0 In-Reply-To: <20150808220717.771230091@linuxfoundation.org> References: <20150808220717.771230091@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 48738 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: gregkh@linuxfoundation.org Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips 4.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Paul Burton commit 4e9d324d4288b082497c30bc55b8ad13acc7cf01 upstream. MIPS32r6 code requires FP64 (ie. FR=1) support. Building a kernel with support for MIPS32r6 binaries but without support for O32 with FP64 is therefore a problem which can lead to incorrectly executed userland. CONFIG_MIPS_O32_FP64_SUPPORT is already selected when the kernel is configured for MIPS32r6, but not when the kernel is configured for MIPS64r6 with O32 compat support. Select CONFIG_MIPS_O32_FP64_SUPPORT in such configurations to prevent building kernels which execute MIPS32r6 userland incorrectly. Signed-off-by: Paul Burton Cc: Markos Chandras Cc: linux-mips@linux-mips.org Cc: Matthew Fortune Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/10674/ Signed-off-by: Ralf Baechle Signed-off-by: Greg Kroah-Hartman --- arch/mips/Kconfig | 1 + 1 file changed, 1 insertion(+) --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1417,6 +1417,7 @@ config CPU_MIPS64_R6 select CPU_SUPPORTS_HIGHMEM select CPU_SUPPORTS_MSA select GENERIC_CSUM + select MIPS_O32_FP64_SUPPORT if MIPS32_O32 help Choose this option to build a kernel for release 6 or later of the MIPS64 architecture. New MIPS processors, starting with the Warrior