We give some new regularity conditions for convex
optimization problems in separated locally convex spaces which
completely characterize the stable strong and strong Lagrange
duality and, respectively, the stable strong and strong Lagrange
duality for the case when a solution of the primal problem is
assumed as known, situations named here total and,
respectively, stable total duality. In particular
instances the conditions we consider turn into some other
constraint qualifications known in the literature, like dual CQ, Farkas-Minkowski CQ, locally Farkas-Minkowski CQ and basic
CQ. We show that our new results extend some existing ones in
the literature.