From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753235AbbDAArL (ORCPT ); Tue, 31 Mar 2015 20:47:11 -0400 Received: from mga03.intel.com ([134.134.136.65]:52694 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753001AbbDAAqc (ORCPT ); Tue, 31 Mar 2015 20:46:32 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,503,1422950400"; d="scan'208";a="707029034" Subject: [PATCH 16/16] x86, mpx: allow mixed binaries again To: linux-kernel@vger.kernel.org Cc: x86@kernel.org, tglx@linutronix.de, Dave Hansen , dave.hansen@linux.intel.com From: Dave Hansen Date: Tue, 31 Mar 2015 17:46:44 -0700 References: <20150401004623.894DF37A@viggo.jf.intel.com> In-Reply-To: <20150401004623.894DF37A@viggo.jf.intel.com> Message-Id: <20150401004644.7024D02F@viggo.jf.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dave Hansen We explicitly disable allowing 32-bit binaries to enable MPX on 64-bit kernels. Re-allow that. Signed-off-by: Dave Hansen --- b/arch/x86/mm/mpx.c | 6 ------ 1 file changed, 6 deletions(-) diff -puN arch/x86/mm/mpx.c~x86-mpx-allow-mixed-binaries-again arch/x86/mm/mpx.c --- a/arch/x86/mm/mpx.c~x86-mpx-allow-mixed-binaries-again 2015-03-31 16:42:17.106221023 -0700 +++ b/arch/x86/mm/mpx.c 2015-03-31 16:42:17.109221158 -0700 @@ -370,12 +370,6 @@ static __user void *task_get_bounds_dir( return MPX_INVALID_BOUNDS_DIR; /* - * 32-bit binaries on 64-bit kernels are currently - * unsupported. - */ - if (IS_ENABLED(CONFIG_X86_64) && test_thread_flag(TIF_IA32)) - return MPX_INVALID_BOUNDS_DIR; - /* * The bounds directory pointer is stored in a register * only accessible if we first do an xsave. */ _