From 35e97790f5f1e5cf2b5522c55e3e31d5c81bd226 Mon Sep 17 00:00:00 2001 From: Dave Hansen Date: Fri, 12 Feb 2016 13:02:00 -0800 Subject: [PATCH] x86/mm/pkeys: Add Kconfig option 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 We will hide the prompt for now. Signed-off-by: Dave Hansen Reviewed-by: Thomas Gleixner Cc: Andrew Morton Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Dave Hansen Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Rik van Riel Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20160212210200.DB7055E8@viggo.jf.intel.com Signed-off-by: Ingo Molnar --- arch/x86/Kconfig | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index ab2ed5328f0a..3632cdd03201 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1714,6 +1714,10 @@ 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 -- 2.20.1