Pre-binding allows a user TD to launch before a MigTD is launched. For
example, a MigTD can be launched later (on demand) before live migration
is initiated. This avoids resource consumption of running MigTDs when
live migration of user TDs isn't needed.
To support pre-binding, a SHA384 hash of the service TD's measurable
attributes (i.e. SERVTD_INFO_HASH as defined in the TDX 1.5 spec) is
required to be added via the "migtd-hash=" QEMU command line. The hash
identifies the MigTD that can be bound later.
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
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