[PATCH v2 0/4] Enable SMEP CPU Feature

[Fenghua Yu]

From: Fenghua Yu <fenghua.yu@xxxxxxxxx>

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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