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Please apply this patch to xen-4.0 tree.


This patch moves xsave option setting and initilization to CPU common
file. Without this Xen would crash on __context_switch() on xsave-capable
AMD CPUs. The crash was due to cpu_has_xsave reports true in domain.c
while xsave space wasn't initialized. This patch is adopted from xen
upstream.

Signed-off-by: Wei Huang <wei.huang2@amd.com>