From: Joey Gouly <joey.gouly@arm.com>
Date: Thu, 22 Aug 2024 15:10:45 +0000 (+0100)
Subject: x86/mm: add ARCH_PKEY_BITS to Kconfig
X-Git-Tag: v6.12-rc1~221^2~2^2~21
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5626f8d45e0951f418cfc06ad8be71e3f51e585f;p=thirdparty%2Flinux.git

x86/mm: add ARCH_PKEY_BITS to Kconfig

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

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
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>
Link: https://lore.kernel.org/r/20240822151113.1479789-3-joey.gouly@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
---

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 007bab9f2a0e3..683c0a64efe2d 100644
--- a/arch/x86/Kconfig
+++ b/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