linux-kernel - [PATCH 07/33] x86, pkeys: define new CR4 bit

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Date:	Fri, 12 Feb 2016 13:02:02 -0800
From:	Dave Hansen <dave@...1.net>
To:	linux-kernel@...r.kernel.org
Cc:	linux-mm@...ck.org, x86@...nel.org, torvalds@...ux-foundation.org,
	Dave Hansen <dave@...1.net>, dave.hansen@...ux.intel.com
Subject: [PATCH 07/33] x86, pkeys: define new CR4 bit


From: Dave Hansen <dave.hansen@...ux.intel.com>

There is a new bit in CR4 for enabling protection keys.  We
will actually enable it later in the series.

Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
---

 b/arch/x86/include/uapi/asm/processor-flags.h |    2 ++
 1 file changed, 2 insertions(+)

diff -puN arch/x86/include/uapi/asm/processor-flags.h~pkeys-02-cr4 arch/x86/include/uapi/asm/processor-flags.h
--- a/arch/x86/include/uapi/asm/processor-flags.h~pkeys-02-cr4	2016-02-12 10:44:16.803272741 -0800
+++ b/arch/x86/include/uapi/asm/processor-flags.h	2016-02-12 10:44:16.807272924 -0800
@@ -118,6 +118,8 @@
 #define X86_CR4_SMEP		_BITUL(X86_CR4_SMEP_BIT)
 #define X86_CR4_SMAP_BIT	21 /* enable SMAP support */
 #define X86_CR4_SMAP		_BITUL(X86_CR4_SMAP_BIT)
+#define X86_CR4_PKE_BIT		22 /* enable Protection Keys support */
+#define X86_CR4_PKE		_BITUL(X86_CR4_PKE_BIT)
 
 /*
  * x86-64 Task Priority Register, CR8
_