linux-kernel - [PATCH 02/12] x86, pku: define new CR4 bit

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Message-Id: <20150507174133.F07CBF8C@viggo.jf.intel.com>
Date:	Thu, 07 May 2015 10:41:33 -0700
From:	Dave Hansen <dave@...1.net>
To:	dave@...1.net
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org
Subject: [PATCH 02/12] x86, pku: define new CR4 bit


There is a new bit in CR4 for enabling protection keys.

---

 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-1-cr4, arch/x86/include/uapi/asm/processor-flags.h
--- a/arch/x86/include/uapi/asm/processor-flags.h~pkeys-1-cr4,	2015-05-07 10:31:41.384187278 -0700
+++ b/arch/x86/include/uapi/asm/processor-flags.h	2015-05-07 10:31:41.387187413 -0700
@@ -120,6 +120,8 @@
 #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
_
--
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