From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932432AbbFGSi5 (ORCPT ); Sun, 7 Jun 2015 14:38:57 -0400 Received: from mga14.intel.com ([192.55.52.115]:65416 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751003AbbFGShG (ORCPT ); Sun, 7 Jun 2015 14:37:06 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,569,1427785200"; d="scan'208";a="706922099" Subject: [PATCH 19/19] 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: Sun, 07 Jun 2015 11:37:06 -0700 References: <20150607183700.7E78D631@viggo.jf.intel.com> In-Reply-To: <20150607183700.7E78D631@viggo.jf.intel.com> Message-Id: <20150607183706.70277DAD@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 Reviewed-by: Thomas Gleixner --- 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 2015-06-01 10:24:26.813749587 -0700 +++ b/arch/x86/mm/mpx.c 2015-06-01 10:24:26.816749722 -0700 @@ -367,12 +367,6 @@ static __user void *mpx_get_bounds_dir(v 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. */ _