* Revisit Boot Information Blob address passing for the different conditions of cold and warm boot for first and secondary execution contexts.
https://review.trustedfirmware.org/c/hafnium/hafnium/+/16859/comment/616b1857_3bd24a55/
* Harden to SPMD to only accept a direct resp. from the SPMC after converying a 'power management' direct request
https://review.trustedfirmware.org/c/hafnium/hafnium/+/16766/comment/efa3b5f9_fad547ec/
* Revisit cpu off and vCPU off usage in spmd handler:
https://review.trustedfirmware.org/c/hafnium/hafnium/+/18788/comment/53c3c571_341d1dd9/
* Create a vm helper function for use by plat_psci_cpu_resume and psci_primary_vm_handler
https://review.trustedfirmware.org/c/hafnium/hafnium/+/16861/3/src/arch/aarch64/plat/psci/spmc.c#63