Introduce tdx_kvm_init() and invoke it in kvm_confidential_guest_init()
if it's a TDX VM.
Set ms->require_guest_memfd to require kvm guest memfd allocation for any
memory backend. More TDX specific initialization will be added later.
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
38b04243ce