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

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

diff --git arch/x86/Kconfig arch/x86/Kconfig
index 007bab9f2a0e..683c0a64efe2 100644
--- arch/x86/Kconfig
+++ arch/x86/Kconfig

@@ -1889,6 +1889,10 @@ 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