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

To: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] [PATCH] x86: use cpuid vector 0xb when available for detecting cpu topology
From: "Han, Weidong" <weidong.han@xxxxxxxxx>
Date: Fri, 16 Jul 2010 16:13:56 +0800
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Cc: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
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Thread-topic: [Xen-devel] [PATCH] x86: use cpuid vector 0xb when available for detecting cpu topology
(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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