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x86-32: Use symbolic constants, safer CPUID when enabling EFER.NX
authorH. Peter Anvin <hpa@zytor.com>
Fri, 13 Nov 2009 23:28:13 +0000 (15:28 -0800)
committerH. Peter Anvin <hpa@zytor.com>
Mon, 16 Nov 2009 21:44:56 +0000 (13:44 -0800)
commit8a50e5135af0c243e117e94e27feb8d149c879b4
tree12779c0a7fca8a43c16054e68a24f0315919576ftree
parent196cf0d67acad70ebb2572da489d5cc7066cdd05commit | diff
x86-32: Use symbolic constants, safer CPUID when enabling EFER.NX

Use symbolic constants rather than hard-coded values when setting
EFER.NX in head_32.S, and do a more rigorous test for the validity of
the response when probing for the extended CPUID range.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
LKML-Reference: <1258154897-6770-2-git-send-email-hpa@zytor.com>
Acked-by: Kees Cook <kees.cook@canonical.com>
arch/x86/kernel/head_32.S diff | blob | history
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