From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f179.google.com (mail-pf0-f179.google.com [209.85.192.179]) by kanga.kvack.org (Postfix) with ESMTP id 1AD586B026C for ; Mon, 14 Dec 2015 14:06:33 -0500 (EST) Received: by pfnn128 with SMTP id n128so110001583pfn.0 for ; Mon, 14 Dec 2015 11:06:32 -0800 (PST) Received: from mga01.intel.com (mga01.intel.com. [192.55.52.88]) by mx.google.com with ESMTP id t74si18779133pfa.170.2015.12.14.11.06.21 for ; Mon, 14 Dec 2015 11:06:21 -0800 (PST) Subject: [PATCH 23/32] x86, pkeys: add Kconfig prompt to existing config option 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: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, x86@kernel.org, Dave Hansen , dave.hansen@linux.intel.com 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org