From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752880AbbI1TVn (ORCPT ); Mon, 28 Sep 2015 15:21:43 -0400 Received: from mga14.intel.com ([192.55.52.115]:6479 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751901AbbI1TSZ (ORCPT ); Mon, 28 Sep 2015 15:18:25 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,604,1437462000"; d="scan'208";a="570003162" Subject: [PATCH 19/25] x86, pkeys: add Kconfig prompt to existing config option To: dave@sr71.net Cc: borntraeger@de.ibm.com, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, dave.hansen@linux.intel.com From: Dave Hansen Date: Mon, 28 Sep 2015 12:18:24 -0700 References: <20150928191817.035A64E2@viggo.jf.intel.com> In-Reply-To: <20150928191817.035A64E2@viggo.jf.intel.com> Message-Id: <20150928191824.B9C1E342@viggo.jf.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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 2015-09-28 11:39:49.547346582 -0700 +++ b/arch/x86/Kconfig 2015-09-28 11:39:49.551346764 -0700 @@ -1696,8 +1696,18 @@ 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" _