Xen devel - Jan 2011 - [PATCH 1/2] xen/pv: blacklist inappropriate new CPUID bits

Hi,

there are some new CPUID bits (and leaves) which Dom0 and PV domains
should not see to avoid trouble, since we don''t emulate the features.
This affects 2.6.37+ kernels on upcoming CPUs.
The most prominent one is a topology leaf, which contains information
specific to the physical CPU, not the virtual one. To avoid confusion
(and possibly crashes) due to a confused Dom0 scheduler simply disable
these bits.
Version 2 including DomU support.

Signed-off-by: Andre Przywara <andre.przywara@amd.com>

-- 
Andre Przywara
AMD-Operating System Research Center (OSRC), Dresden, Germany



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