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Message-Id: <20160129181650.F1EBAE1E@viggo.jf.intel.com>
Date: Fri, 29 Jan 2016 10:16:50 -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 05/31] 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 2016-01-28 15:52:18.493318327 -0800
+++ b/arch/x86/include/uapi/asm/processor-flags.h 2016-01-28 15:52:18.497318510 -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
_
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