From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-f41.google.com (mail-oi0-f41.google.com [209.85.218.41]) by kanga.kvack.org (Postfix) with ESMTP id D362D6B0009 for ; Wed, 6 Jan 2016 19:01:48 -0500 (EST) Received: by mail-oi0-f41.google.com with SMTP id o124so303368648oia.1 for ; Wed, 06 Jan 2016 16:01:48 -0800 (PST) Received: from mga02.intel.com (mga02.intel.com. [134.134.136.20]) by mx.google.com with ESMTP id j9si2363688obw.29.2016.01.06.16.01.14 for ; Wed, 06 Jan 2016 16:01:14 -0800 (PST) Subject: [PATCH 03/31] x86, pkeys: Add Kconfig option From: Dave Hansen Date: Wed, 06 Jan 2016 16:01:09 -0800 References: <20160107000104.1A105322@viggo.jf.intel.com> In-Reply-To: <20160107000104.1A105322@viggo.jf.intel.com> Message-Id: <20160107000109.E671EBF4@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 a Kconfig prompt 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. Note that, with disabled-features.h, the checks in the code for protection keys are always the same: cpu_has(c, X86_FEATURE_PKU) With the config option disabled, this essentially turns into an #ifdef. We will hide the prompt for now. Signed-off-by: Dave Hansen Reviewed-by: Thomas Gleixner --- b/arch/x86/Kconfig | 4 ++++ 1 file changed, 4 insertions(+) diff -puN arch/x86/Kconfig~pkeys-01-kconfig arch/x86/Kconfig --- a/arch/x86/Kconfig~pkeys-01-kconfig 2016-01-06 15:50:03.902078982 -0800 +++ b/arch/x86/Kconfig 2016-01-06 15:50:03.905079117 -0800 @@ -1680,6 +1680,10 @@ config X86_INTEL_MPX If unsure, say N. +config X86_INTEL_MEMORY_PROTECTION_KEYS + def_bool y + depends on CPU_SUP_INTEL && X86_64 + config EFI bool "EFI runtime service support" depends on ACPI _ -- 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