linux-kernel - [tip:x86/smep] x86, cpu: Add SMEP CPU feature in CR4

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Message-ID: <tip-dc23c0bccf5eea171c87b3db285d032b9a5f06c4@git.kernel.org>
Date:	Wed, 18 May 2011 05:13:08 GMT
From:	tip-bot for Fenghua Yu <fenghua.yu@...el.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	fenghua.yu@...el.com, tglx@...utronix.de, hpa@...ux.intel.com
Subject: [tip:x86/smep] x86, cpu: Add SMEP CPU feature in CR4

Commit-ID:  dc23c0bccf5eea171c87b3db285d032b9a5f06c4
Gitweb:     http://git.kernel.org/tip/dc23c0bccf5eea171c87b3db285d032b9a5f06c4
Author:     Fenghua Yu <fenghua.yu@...el.com>
AuthorDate: Tue, 17 May 2011 18:44:27 -0700
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Tue, 17 May 2011 21:06:42 -0700

x86, cpu: Add SMEP CPU feature in CR4

Add support for newly documented SMEP (Supervisor Mode Execution Protection)
CPU feature in CR4.

Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
LKML-Reference: <1305683069-25394-3-git-send-email-fenghua.yu@...el.com>
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/include/asm/processor-flags.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/processor-flags.h b/arch/x86/include/asm/processor-flags.h
index a898a2b..59ab4df 100644
--- a/arch/x86/include/asm/processor-flags.h
+++ b/arch/x86/include/asm/processor-flags.h
@@ -60,6 +60,7 @@
 #define X86_CR4_OSXMMEXCPT 0x00000400 /* enable unmasked SSE exceptions */
 #define X86_CR4_VMXE	0x00002000 /* enable VMX virtualization */
 #define X86_CR4_OSXSAVE 0x00040000 /* enable xsave and xrestore */
+#define X86_CR4_SMEP	0x00100000 /* enable SMEP support */
 
 /*
  * x86-64 Task Priority Register, CR8
--
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