linux-kernel - [PATCH v2 0/4] Enable SMEP CPU Feature

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Date:	Mon, 16 May 2011 14:34:41 -0700
From:	"Fenghua Yu" <fenghua.yu@...el.com>
To:	"Ingo Molnar" <mingo@...e.hu>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"H Peter Anvin" <hpa@...or.com>,
	"Asit K Mallick" <asit.k.mallick@...el.com>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Avi Kivity" <avi@...hat.com>,
	"Arjan van de Ven" <arjan@...radead.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Andi Kleen" <andi@...stfloor.org>
Cc:	"linux-kernel" <linux-kernel@...r.kernel.org>,
	"Fenghua Yu" <fenghua.yu@...el.com>
Subject: [PATCH v2 0/4] Enable SMEP CPU Feature

From: Fenghua Yu <fenghua.yu@...el.com>

Intel new CPU supports SMEP (Supervisor Mode Execution Protection). SMEP
prevents kernel from executing code in application. Updated Intel SDM describes
this CPU feature. The document will be published soon.

Note: This patch set doesn't enable the SMEP feature in KVM. If it's needed,
another patch will be pushed for enabling the feature in KVM.

Fenghua Yu (4):
  x86, cpu: Add CPU flags for SMEP
  x86, cpu: Add SMEP CPU feature in CR4
  x86, head_32/64.S: Enable SMEP
  x86/kernel/common.c: Disable SMEP by kernel option nosmep

 Documentation/kernel-parameters.txt    |    4 ++++
 arch/x86/include/asm/cpufeature.h      |    1 +
 arch/x86/include/asm/processor-flags.h |    1 +
 arch/x86/kernel/cpu/common.c           |   22 ++++++++++++++++++++++
 arch/x86/kernel/cpu/scattered.c        |    1 +
 arch/x86/kernel/head_32.S              |   17 +++++++++++++----
 arch/x86/kernel/head_64.S              |   13 +++++++++++--
 7 files changed, 53 insertions(+), 6 deletions(-)

-- 
1.7.2

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