[PATCH 26/37] x86, pkeys: add Kconfig prompt to existing config option

From: Dave Hansen
Date: Mon Nov 16 2015 - 22:35:53 EST

From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>

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 <dave.hansen@xxxxxxxxxxxxxxx>

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 2015-11-16 12:36:25.794461970 -0800
+++ b/arch/x86/Kconfig 2015-11-16 19:22:09.251726882 -0800
@@ -1682,8 +1682,18 @@ config X86_INTEL_MPX
If unsure, say N.

+ 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"
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