KVM: SVM: Add support for SEV-ES capability in KVM

Add support to KVM for determining if a system is capable of supporting
SEV-ES as well as determining if a guest is an SEV-ES guest.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <e66792323982c822350e40c7a1cf67ea2978a70b.1607620209.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 files changed