[Xen-devel] [PATCH] x86: use cpuid vector 0xb when available for detecting cpu topology

["Han, Weidong" <weidong.han@xxxxxxxxx>]

(Most code is ported from Linux kernel.)

cpuid leaf 0xb provides extended topology enumeration. This interface provides 
the 32-bit x2APIC id of the logical processor and it also provides a new 
mechanism to detect SMT and core siblings (which provides increased 
addressability).


Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>

Attachment: cpuid-leafB.patch
Description: cpuid-leafB.patch

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