RE: [sv-ec] Virtual interface initialized with inst_name.modport

With the changes in Mantis 1330, you can now declare a virtual interface
of a particular modport type.  You can assign a value to it from an
interface or virtual interface with that same modport type.  You can
also assign a value to it from an interface or virtual interface with
no modport.  It isn't explicitly stated, but the reverse is not allowed.
You cannot assign an interface or virtual interface with a modport to
a virtual interface without a modport.

A modport can be used to provide restricted access to an interface.  If
the recipient could assign the modport to an unrestricted virtual
interface, then they could use that virtual interface to improperly
bypass the restriction.

Steven Sharp
sharp@cadence.com


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