From: Joerg Roedel <joerg.roedel-5C7GfCeVMHo@public.gmane.org>

This patch enables the virtualization of the last branch record MSRs on
SVM if this feature is available in hardware. It also introduces a small
and simple check feature for specific SVM extensions.

Signed-off-by: Joerg Roedel <joerg.roedel-5C7GfCeVMHo@public.gmane.org>

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Joerg Roedel
Operating System Research Center
AMD Saxony LLC & Co. KG