Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932647AbbLNTKc (ORCPT ); Mon, 14 Dec 2015 14:10:32 -0500 Received: from mga01.intel.com ([192.55.52.88]:20904 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932449AbbLNTGV (ORCPT ); Mon, 14 Dec 2015 14:06:21 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,428,1444719600"; d="scan'208";a="13016489" Subject: [PATCH 23/32] x86, pkeys: add Kconfig prompt to existing config option To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, x86@kernel.org, Dave Hansen , dave.hansen@linux.intel.com From: Dave Hansen Date: Mon, 14 Dec 2015 11:06:20 -0800 References: <20151214190542.39C4886D@viggo.jf.intel.com> In-Reply-To: <20151214190542.39C4886D@viggo.jf.intel.com> Message-Id: <20151214190620.1EEBABDF@viggo.jf.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1576 Lines: 46 From: Dave Hansen I don't have a strong opinion on whether we need this or not. Protection Keys has relatively little code associated with it, and it is not a heavyweight feature to keep enabled. However, I can imagine that folks would still appreciate being able to disable it. Here's the option if folks want it. Signed-off-by: Dave Hansen Reviewed-by: Thomas Gleixner --- b/arch/x86/Kconfig | 10 ++++++++++ 1 file changed, 10 insertions(+) diff -puN arch/x86/Kconfig~pkeys-40-kconfig-prompt arch/x86/Kconfig --- a/arch/x86/Kconfig~pkeys-40-kconfig-prompt 2015-12-14 10:42:49.213090279 -0800 +++ b/arch/x86/Kconfig 2015-12-14 10:42:49.216090413 -0800 @@ -1682,8 +1682,18 @@ config X86_INTEL_MPX If unsure, say N. config X86_INTEL_MEMORY_PROTECTION_KEYS + prompt "Intel Memory Protection Keys" def_bool y + # Note: only available in 64-bit mode depends on CPU_SUP_INTEL && X86_64 + ---help--- + Memory Protection Keys provides a mechanism for enforcing + page-based protections, but without requiring modification of the + page tables when an application changes protection domains. + + For details, see Documentation/x86/protection-keys.txt + + If unsure, say y. config EFI bool "EFI runtime service support" _ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/