[PATCH v4 02/29] x86/mm: add ARCH_PKEY_BITS to Kconfig

[Joey Gouly]

The new config option specifies how many bits are in each PKEY.

Signed-off-by: Joey Gouly <joey.gouly at arm.com>
Cc: Thomas Gleixner <tglx at linutronix.de>
Cc: Ingo Molnar <mingo at redhat.com>
Cc: Borislav Petkov <bp at alien8.de>
Cc: Dave Hansen <dave.hansen at linux.intel.com>
Cc: H. Peter Anvin <hpa at zytor.com>
Cc: x86 at kernel.org
---
 arch/x86/Kconfig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 928820e61cb5..109e767d36e7 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1879,6 +1879,10 @@ config X86_INTEL_MEMORY_PROTECTION_KEYS
 
 	  If unsure, say y.
 
+config ARCH_PKEY_BITS
+	int
+	default 4
+
 choice
 	prompt "TSX enable mode"
 	depends on CPU_SUP_INTEL
-- 
2.25.1