Xen devel - Apr 2010 - [PATCH] intel_txt: to add more strict check to detect VMX disabled by BIOS

This patch is to add more strict check to detect if VMX is disabled by BIOS.

According to the Intel SDM 3B spec,
- Bit 1 enables VMXON in SMX operation. If this bit is clear, execution of
VMXON in SMX operation causes a general-protection exception.
- Bit 2 enables VMXON outside SMX operation. If this bit is clear, execution of
VMXON outside SMX operation causes a general-protection exception.

Signed-off-by: Shane Wang <shane.wang@intel.com>

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