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Subject[PATCH v2 0/4] x86: clear XD_DISABLED flag on Intel to regain NX
This will clear the MSR_IA32_MISC_ENABLE_XD_DISABLE bit so that NX cannot
be inappropriately controlled by the BIOS on Intel CPUs. If NX actually
needs to be disabled, "noexec=off" can be used.

Based on feedback from HPA, this was reworked to extend the existing
"verify_cpu" routines, and to more tightly confine which CPUs will call
MSR_IA32_MISC_ENABLE. Since it includes some re-arrangements of files, I
tried to break the patches up into their logical steps.

-Kees

--
Kees Cook
Ubuntu Security Team


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