From: tip-bot for Fenghua Yu <fenghua.yu@intel.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com,
fenghua.yu@intel.com, tglx@linutronix.de, hpa@linux.intel.com
Subject: [tip:x86/smep] x86, cpu: Add SMEP CPU feature in CR4
Date: Wed, 18 May 2011 05:13:08 GMT [thread overview]
Message-ID: <tip-dc23c0bccf5eea171c87b3db285d032b9a5f06c4@git.kernel.org> (raw)
In-Reply-To: <1305683069-25394-3-git-send-email-fenghua.yu@intel.com>
Commit-ID: dc23c0bccf5eea171c87b3db285d032b9a5f06c4
Gitweb: http://git.kernel.org/tip/dc23c0bccf5eea171c87b3db285d032b9a5f06c4
Author: Fenghua Yu <fenghua.yu@intel.com>
AuthorDate: Tue, 17 May 2011 18:44:27 -0700
Committer: H. Peter Anvin <hpa@linux.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@intel.com>
LKML-Reference: <1305683069-25394-3-git-send-email-fenghua.yu@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.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
next prev parent reply other threads:[~2011-05-18 5:13 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-18 1:44 [PATCH v3 0/4] Enable SMEP CPU Feature Fenghua Yu
2011-05-18 1:44 ` [PATCH v3 1/4] x86, cpu: Add CPU flags for SMEP Fenghua Yu
2011-05-18 4:01 ` [tip:x86/cpufeature] x86, cpufeature: Add cpufeature flag " tip-bot for Fenghua Yu
2011-05-18 1:44 ` [PATCH v3 2/4] x86, cpu: Add SMEP CPU feature in CR4 Fenghua Yu
2011-05-18 5:13 ` tip-bot for Fenghua Yu [this message]
2011-05-18 1:44 ` [PATCH v3 3/4] x86, head_32/64.S: Enable SMEP Fenghua Yu
2011-05-18 1:44 ` [PATCH v3 4/4] x86/kernel/cpu/common.c: Disable SMEP by kernel option nosmep Fenghua Yu
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