Please modify the Linux kernel, here is the instruction.

x86, cpu: Use AMD errata checking framework for erratum 383
http://groups.google.com/group/fa.linux.kernel/browse_thread/thread/5e76406ac58d508f/ee9e86da2ef4aabf?show_docid=ee9e86da2ef4aabf&pli=1

CPU erratum codes locate in the files below. You have to replace the files below and recompile kernel amd
arch/x86/include/asm/processor.h
arch/x86/kernel/cpu/amd.c
arch/x86/kvm/svm.c

This link has document for compile and upgrade kernel. It is a little bit complicated.
http://www.howtoforge.com/kernel_compilation_centos

Or you can use Fedora14 without kernel modification.