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x86, cpu: Add SMEP CPU feature in CR4

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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>
This commit is contained in:
Fenghua Yu 2011-05-17 18:44:27 -07:00 committed by H. Peter Anvin
parent d0281a257f
commit dc23c0bccf
1 changed files with 1 additions and 0 deletions
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arch/x86/include/asm/processor-flags.h
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@ -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