Not needed any more, SMM + 64-bit PEI + S3 suspend works now. Fixed by commits: -8bd2028f9a
("MdeModulePkg: Supporting S3 in 64bit PEI") -6acf72901a
("UefiCpuPkg: Supporting S3 in 64bit PEI") See also https://bugzilla.tianocore.org/show_bug.cgi?id=4195 Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Ray Ni <ray.ni@intel.com>