OVMF.inteltdx.fd
  This is a unified image that includes both the code and varstore.
  It provides the support for Intel TDX (Trust Domain eXtension)
  confidential Virtual Machine.

OVMF.inteltdx.secboot.fd
  This is a unified image that includes both the code and varstore.
  It provides the support for Intel TDX (Trust Domain eXtension)
  confidential Virtual Machine.
  This image has secure boot enabled and contains all the required
  certificates.
