svm: Fix for AMD erratum 383 on Family 10h CPUs

svm: Fix for AMD erratum 383 on Family 10h CPUs

This patches implements the workaround of AMD erratum 383 on family
10h CPUs. It destroys the guest VM when a MC error with a special
pattern is detected. Without this patch, a guest VM failure can
potentially crash Xen hypervisor and the whole system. The erratum
will be published in next version of guide.

Signed-off-by: Wei Huang <wei.huang2@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Christoph Egger <christoph.egger@amd.com>